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SERVICE MANUALCOMPACT COMPONENT SYSTEM
No.21026Sep. 2001
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
MX-GT98V/MX-GT95VMX-GT88V/MX-GT85V
MX-G78V/MX-G75V
Safety precautionsImportant for laser productsPreventing static electricityDisassembly methodAdjustment method
1-21-31-41-51-29
Flow of functional operation until TOC readMaintenance of laser pickupReplacement of laser pickupDescription of major ICs
1-331-341-341-35~49
Contents
(No MIC jack and MIC LEVEL volume for UN ver.)
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
COMPACT
DIGITAL VIDEO
COMPACT
DIGITAL AUDIO
Area suffix
US -------- SingaporeUN --------------Asean
SP-MXGT98VSP-MXGT95V
SP-MXGT98VSP-MXGT95V
CA-MXGT98VCA-MXGT95V
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-2
1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.
2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturer's warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.
3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.
4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.
5. Leakage current check (Electrical shock hazard testing)After re-assembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.Do not use a line isolation transformer during this check.
Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).Alternate check methodPlug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground.Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).
1. This equipment has been designed and manufactured to meet international safety standards.2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.3. Repairs must be made in accordance with the relevant safety standards.4. It is essential that safety critical components are replaced by approved parts.5. If mains voltage selector is provided, check setting for local voltage.
Good earth ground
Place this probe on each exposedmetal part.
AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)
1500 10W
0.15 F AC TYPE
!Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.
In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " " mark nearby are critical for safety. When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer. (Except the J&C version)
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-3
Important for laser products
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
4.CAUTION : The compact disc player uses invisible laser
radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are defeated. It is
dangerous to defeat the safety switches.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.
VARNING : Osynlig laserstrålning är denna del är öppnad
och spårren är urkopplad. Betrakta ej strålen.
VARO : Avattaessa ja suojalukitus ohitettaessa olet
alttiina näkymättömälle lasersäteilylle.Älä katso
säteeseen.
ADVARSEL : Usynlig laserstråling ved åbning , når
sikkerhedsafbrydere er ude af funktion. Undgå
udsættelse for stråling.
ADVARSEL : Usynlig laserstråling ved åpning,når
sikkerhetsbryteren er avslott. unngå utsettelse
for stråling.
Position of labels
WARNING LABEL
! CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.
DANGER : Invisibie laser radiation
when open and interlock or
defeated.
AVOID DIRECT EXPOSURE TO
BEAM (e)
VARNING : Osynlig laserstrålning
är denna del är öppnad och spårren
är
urkopplad. Betrakta ej strålen.
(s)
VARO : Avattaessa ja suojalukitus
ohitettaessa olet alttiina
näkymättömälle lasersäteilylle.Älä
katso säteeseen. (d)
ADVARSEL :Usynlig laserstråling
ved åbning , når
sikkerhedsafbrydere er ude af
funktion. Undgå udsættelse for
stråling. (f)
CLASS 1LASER PRODUCT
CLASS 1LASER PRODUCT
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-4
Preventing static electricity1. Grounding to prevent damage by static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
2. About the earth processing for the destruction prevention by static electricity In the equipment which uses optical pick-up (laser diode), optical pick-up is destroyed by the static electricity of the work environment.Be careful to use proper grounding in the area where repairs are being performed.
2-1 Ground the workbench Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.
2-2 Ground yourself Use an anti-static wrist strap to release any static electricity built up in your body.
3. Handling the optical pickup1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.)
2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode.
4. Handling the traverse unit (optical pickup)1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector.
3. Handle the flexible cable carefully as it may break when subjected to strong force.
4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it
Conductive material (conductive sheet) or iron plate
(caption)Anti-static wrist strap
Attention when traverse unit is decomposed
1. Remove the disk stopper and T. bracket on the CD changer mechanism assembly. 2. Disconnect the harness from connector on the CD motor board.3. CD traverse unit is put up as shown in Fig.1. 4. Solder is put up before the card wire is removed from connector CN601 on the CD servo control board as shown in Fig. 2. (When the wire is removed without putting up solder, the CD pick-up assembly might destroy.) 5. Please remove solder after connecting the card wire with CN601 when you install picking up in the substrate.
*Please refer to "Disassembly method" in the text for pick-up and how to detach the CD traverse mechanism.
Soldering
Fig.1
Fig.2
CD changermechanism
assembly
CD traverse unit
Flexible cable
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-5
Remove the six screws A on the back of the body.
Remove the two screws B on both sides of the body.
Remove the metal cover from the body by lifting the rear part of the cover.
1.
2.
3.
Disassembly method<Main body>
Removing the metal cover (See Fig.1 to 3)
Do not break the front panel tab fitted to the metal cover.
CAUTION: Fig.1
Fig.2
Fig.3
A
AA
Metal cover
Metal cover
B
Metal cover
B
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-6
Prior to performing the following procedure, remove the metal cover.
Disconnect the wire from connector CN705 on the amplifier board.
Remove the plastic rivet attaching the main board to the front assembly on the right side of the body.
Disconnect the card wire from connector CN561 on the main board.
Remove the two screws C on the upper side of the body and the two screws D on the back of the rear panel.
Pull both the rear panel and the front panel assembly to the outside, then remove the CD changer mechanism assembly by lifting the rear part of the assembly.
1.
2.
3.
4.
5.
Disconnect the card wire from connector CN504 on the inner side of the main board on the right side of the body. Remove the CD mechanism assembly.
6.
Removing the CD changer mechanism assembly (See Fig.4 and 6)
Prior to performing the following procedure, remove the metal cover and the CD changer mechanism assembly.
Turn over the CD changer mechanism assembly and remove the two screws E attaching the fan.
1.
Removing the fan (See Fig.7)
To prevent damage to the CD fitting, be sure to pull both the rear panel and the front panel assembly enough to remove the CD changer mechanism assembly.
CAUTION:
At this point, one card wire on the underside of the CD mechanism assembly is still connected.
REFERENCE:
Fig.4
Fig.5
Fig.6
Fig.7
Front panel assembly
CC
CD changer mechanism assembly
Rear panel
Main boardCN561
CN504
CD changer mechanism assembly
DMain boardCN561
Front panel assembly
Rear panel
CD changer mechanism assembly Front panel assembly
Amplifier boardCN705
CN504
Fan
EE
CD changer mechanism assembly
Rear panel
Plastic rivet
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-7
Prior to performing the following procedure, remove the metal cover and CD changer mechanism assembly.
Disconnect the card wires from connector CN870, CN871 and CN315 on the main board respectively.
Remove the wire clamp and disconnect the wire from connector CN703 on the amplifier board.
Disconnect the wire from connector CN220 on the transformer board.
Remove the two screws F on the bottom of the body.
Release the two joints a on the lower right and left sides of the body using a screwdriver, and remove the front panel assembly toward the front.
1.
2.
3.
4.
5.
Removing the front panel assembly (See Fig.8 to 11)
Fig.9
Fig.10
Fig.11
F
(Bottom)
Joint a
Joint a
Front panel assembly
Front panel assembly
Fig.8
Wire clampAmplifier boardCN703
Main boardCN870
CN871
CN315
Transformer boardCN220
Front panel assembly
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-8
Prior to performing the following procedure, remove the metal cover.
Disconnect the card wire from connector CN1 on the tuner board on the right side of the body.
Remove the plastic rivet fixing the tuner board.
Remove the two screws G on the back of the body.
1.
2.
3.
Removing the tuner board (See Fig.12)
Prior to performing the following procedure, remove the metal cover and the CD changer mechanism assembly.
Remove the screw H attaching the rear cover on the back of the body.
Push each tab of the four joints b in the direction of the arrow and release.
Remove the fifteen screws G attaching the rear panel.
Disengage the joints c on each lower side of the rear panel using a screwdriver and remove the rear panel backward.
1.
2.
3.
4.
Removing the rear cover / rear panel(See Fig.13 to 16)
Fig.12
Fig.13
Fig.14
Fig.15Fig.16
CN1Plastic rivet
Tuner boardRear panel
Rear panelH
G
Joint bJoint b
Rear cover
Rear panel
G
G
G G
G
Joint cJoint c Rear panel Rear panel
G
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-9
Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly, the rear panel and the antenna board.
Disconnect the card wires from connector CN870, CN871 and CN315 on the main board.
Disconnect the wires from connector CN704 and CN706 on the amplifier board.
Remove the screw I attaching the main board on the right side ofthe body.
Disconnect connector CN211 and CN212 on the main board from the regulator board.
1.
2.
3.
4.
Removing the main board (See Fig.17 and 18)
Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly and the rear panel.
Disconnect connector CN217 on the speaker board from the regulator board.
1.
Removing the speaker board (See Fig.19)
It is not necessary to remove the main board.
REFERENCE:
Fig.17
Fig.18
Fig.19
Front panel assembly
Amplifier boardCN704CN706
Main boardCN870
CN871CN315
Main board
Front panel assembly
I CN211CN212
Regulator board
Regulator boardCN217
Speaker board
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-10
Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly and the rear panel.
Disconnect the wires from connector CN703, CN704 and CN706 on the amplifier board respectively.
Remove the two wire clamps attaching the wire to the amplifier board and the voltage board.
Disconnect connector CN215 on the amplifier board and CN216 on the voltage board from the regulator board (The heat sink will be detached at once).
Remove the four screws J attaching the amplifier board to the heat sink.
Remove the two screws K, the board bracket and the voltage board.
1.
2.
3.
4.
5.
Removing the amplifier board / voltage board / heat sink (See Fig.21 and 22)
Prior to performing the following procedure, remove the metal cover, the CD changermechanism assembly and the rear panel.
Remove a wire clamp on the power board.
Disconnect the wire from connector CN218, CN219 and CN250 on the power board.
Disconnect connector CN251 on the power board from the regulator board.
1.
2.
3.
Removing the power board (See Fig.20)
It is not necessary to remove the power board.
REFERENCE:
Fig.21
Fig.20
Fig.22
Amplifier boardCN704CN706
CN216Regulator board
CN215
Wire clamp
Wire clamp
CN703
Voltage board
Amplifier board
Heat sink
Voltage board
J
J
K
CN218Power board
CN219
Wire clampCN251
CN250
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-11
Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly and the rear panel.
Disconnect the wires from connector CN218 and CN219 on the power board.
Disconnect the wire from connector CN204 on the regulator board.
Release the wire from the stopper on the regulator board.
Remove the four screws L attaching the transformer assembly.
1.
2.
3.
4.
Removing the power transformer assembly (See Fig.23 and 24)
Prior to performing the following procedure, remove metal cover, CD changer mechanism assembly, rear panel, antenna board, main board, amplifier board, voltage board, power board and speaker board.
Disconnect the wire from connector CN204 on the regulator board.
Release the wire from the stopper on the regulator board.
Remove the two screws M attaching the regulator board.
1.
2.
3.
Removing the regulator board (See Fig.25)
Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly and the rear panel.
Disconnect the wire from connector CN250 on the power board.
Remove the wire clamp from the power board.
Move the power cord stopper upward and pull out it from the base chassis.
1.
2.
3.
Removing the power cord (See Fig.26)
Fig.23
Fig.24
Fig.25
Fig.26
CN219
Regulator boardCN204
Power transformer assembly
Power transformer assembly Regulator board
CN204
L L
M
M
Power transformer assembly
Power board
CN218
Stopper
Regulator boardCN204
Stopper
Power boardCN250
Power cord stopper
Wire clampBase chassis
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-12
<Front panel assembly>Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly and the front panel assembly.
Disconnect the card wire from connector CN306 on the head amplifier & mechanism control board.
Remove the seven screws N attaching the cassette mechanism assembly.
1.
2.
Removing the cassette mechanism assembly (See Fig.27)
Remove the four screws O attaching the stay bracket.
Disconnect the card wires from connector CN316 and CN880 on the display system control board.
Remove the six screws P attaching the display system control board.
If necessary, disconnect the wire from connector CN911 on the front side of the display system control board and unsolder FW915.
1.
2.
3.
4.
Removing the display system control board (See Fig.28 to 30)
Remove the three screws Q attaching the CD eject board.
If necessary, unsolder FW915 on the CD eject board.
1.
2.
Removing the CD eject board (See Fig.30 and 31)
Fig.27
Head amplifier & mechanismcontrol board CN306 N
N
N
N
Cassette mechanism assembly
Fig.28
Fig.29
Fig.30Fig.31
O
Display system control board Stay bracket
P
P
P
P
CN316
CN880
FW915(Solding)
P
Display system control board
FW915
FW915
CD eject board
CN911
Display system control board
CD eject boardFW915
(Solding)
Q
Q
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-13
Prior to performing the following procedure, remove the display system control board.
Pull out the preset knob on the front panel.
Remove the four screws R attaching the preset / tuning switch board.
If necessary, unsolder FW901 on the preset / tuning switch board.
1.
2.
3.
Removing the preset / tuning switch board (See Fig.32 and 33)
Prior to performing the following procedure, remove the display system control board and the preset / tuning switch board.
Pull out the volume knob on the front panel and remove the nut. Pull out the surround mode knob, the mic level knob and the surround woofer level knob toward the front.
Remove the thirteen screws S attaching the operation switch board. (CA-MXG75V / MXG78V, CA-MXGT85V / MXGT88V)
Remove the twelve screws S attaching the operation switch board. (CA-MXGT95V / MXGT98V)
Release each tab of the seven joints g retaining the operation switch board.
1.
2.
3.
Removing the operation switch board (See Fig.33 and 34)
Fig.32
Fig.33
Fig.34
Preset / tuning switch board
R
R
Volume knob Nut
Surround woofer level knob
Surround mode knobPreset knob
S
SSSS
S
SJoint g
Joint g
Joint g
Joints g
Joints g
Operation switch board
Fig.34
S
SSSS
S
SJoint g
Joint g
Joint g
Joints g
Joints g
Operation switch board
Mic level knob
CA-MXG75V / MXG78VCA-MXGT85V / MXGT88V
(CA-MXGT95V / MXGT98V)
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-14
Remove the four screws A attaching the front panel on the front of the body.
Pull out the front panel toward the front and disconnect the wire from the two speaker terminals of the speaker (tweeter) on the back of the front panel.
1.
2.
<Speaker section>[for MX-GT98V/MX-GT95V]
Removing the front panel (See Fig.1 and 2)
Prior to performing the following procedures, remove the front panel.
Remove the two screws B attaching the speaker (tweeter) on the back of the front panel.
1.
Removing the speaker (tweeter) (See Fig.3)
Prior to performing the following procedures, remove the front panel.
Remove the six screws C attaching the sub panel on the back of the front panel.
Pull out the sub panel toward the front.
1.
2.
Removing the sub panel (See Fig.4)
Fig.1
Fig.2
Fig.3Fig.4
A
A
A
A
BSub panel
Speaker (tweeter)
C
C
Speaker (tweeter)
Speaker terminals
CSpeaker (tweeter)
Front panel
Front panel
Front panel
Front panel
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-15
Prior to performing the following procedures, remove the front panel.
Remove the four screws E attaching the speaker (squawker) on the front of the body.
Disconnect the wire from the two speaker terminals of the speaker (squawker).
1.
2.
Removing the speaker (squawker) (See Fig.5)
Prior to performing the following procedures, remove the front panel.
Remove the eight screws D attaching the punch panel on the front of the body.
Remove the six screws F attaching the speaker (woofer) on the front of the body.
Remove the speaker (woofer) toward the front and disconnect the wire from the two speaker terminals.
1.
2.
3.
Removing the speaker (woofer) (See Fig.6 and 7)
Remove the four screws G attaching the duct on the upper side of the body.
Move the duct upwards and pull out backward.
1.
2.
Removing the duct (See Fig.8)
Fig.5
Fig.6
Fig.7Fig.8
D
Speaker (squawker)
D
EE
Speaker (woofer)
F
Front panel
GDuct
G
Speaker (squawker)
Punch panel
F
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-16
Remove the four screws A attaching the front panel on the front of the body.
Pull out the front panel toward the front.
1.
2.
[for MX-GT88V/MX-GT85V]
Removing the front panel (See Fig.1)
Prior to performing the following procedures, remove the front panel.
Remove the two screws B attaching the speaker (tweeter) on the front of the body.
Disconnect the wire from two speaker terminals of the speaker (tweeter).
1.
2.
Removing the supeaker (tweete) (See Fig.2)
Prior to performing the following procedures, remove the front panel.
Remove the four screws C attaching the speaker (squawker) on the front of the body.
Disconnect the wire from the two speaker terminals of the speaker (squawker).
1.
2.
Removing the speaker (squawker)(See Fig.3)
Fig.1
Fig.2
Fig.3
A A
AA
Front panel
B
Speaker (squawker)
Spealer (tweeter)
Speaker (squawker)
CC
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-17
Prior to performing the following procedures, remove the front paenel.
Remove the six screws D attaching the punch panel on the front of the body.
Remove the four screws E attaching the speaker (woofer) on the front of the body.
Pull out the speaker (woofer) toward the front and disconnect the wire from the two speaker terminals.
1.
2.
3.
Removing the speaker (woofer) (See Fig.4 and 5)
Prior to performing the following procedures, remove the front panel.
Remove the six screws F attaching the sub panel on the back of the front panel.
Remove the sub panel toward the front.
1.
2.
Removing the sub panel (See Fig.6 )
Remove the four screws G attaching the duct on the upper side of the body.
Move the duct upwards and pull out backward.
1.
2.
Removing the duct (See Fig.7)
Fig.4
Fig.5
Fig.6Fig.7
D
Punch panel
D
EE
Speaker (woofer)
Sub panel
FFFront paenl
GDuct
G
Front paenl
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-18
Remove the six screws A on the side of the body.1.
Removing the side cover (See Fig.1)
Prior to performing the following procedure, remove the side cover.
Remove the four screws B on the side of the body.
Disconnect the red and black wires from the speaker terminals on the squawker speaker.
1.
2.
Removing the squawker speaker (See Fig.2)
Prior to performing the following procedure, remove the side cover.
Pull out the saran net toward the front while disengaging the four joints a.
Remove the two screws C and D respectively.
Remove the front cover toward the front and disconnect the yellow and black wires from the two tweeter speaker terminals.
1.
2.
3.
Removing the front cover (See Fig.3 to 5)
[for MX-G78V/MX-G75V]
Fig.1
Fig.2
Fig.3
A
A
AA
Side cover
BSquawker speaker
B
Joints a
Joints a
Saran net
Fig.4
Front cover
C C
DD
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-19
Prior to performing the following procedure, remove the side cover and the front cover.
Remove the four screws E on the front of the body.
Pull out the woofer speaker toward the front and disconnect the wire (yellow and black,blue and black) from the two speaker terminals.
1.
2.
Removing the woofer speaker (See Fig.6)
Prior to performing the following procedure, remove the side cover and the front cover.
Remove the two screws F attaching the tweeter speaker on the back of the front cover.
1.
Removing the tweeter speaker (See Fig.7)
Fig.5
Fig.6
Fig.7
Woofer speaker
E
Tweeter speaker
E
Tweeter speaker
Front cover
F
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-20
Removing the CD Servo control board (See Fig.1)
Removing the CD tray assembly (See Fig.2~4)1.2.3. 4.5.
6.
7.
8.
9.
Remove the front panel assembly.Remove the CD changer mechanism assembly.Remove the CD Servo control board.Remove the screw B' retaining the lod stopper.From the T.bracket section "b" and clamper base section "c" , remove both of the edges fixing the rod(See Fig.2 and 3).Remove the screw B retaining the disc stopper (See Fig.3).Remove the three screws C retaining the T.bracket (See Fig.3).Remove the screw D retaining the clamper assembly (See Fig.3).From the left side face of the chassis assembly, remove the one screw E retaining both of the return spring and lock lever(See Fig. 4).By removing the pawl at the section "d" fixing the return spring, dismount the return spring(See Fig.4).Remove the three lock levers(See Fig.4).
10.
11.
Fig.1
Fig.2
Fig.3Fig.4
1.Remove the metal cover.2.Remove the CD changer mechanism assembly.3.From bottom side the CD changer mechanism assembly, remove the four screws A retaining the CD servo control board.4.Absorb the four soldered positions "a" of the right and left motors with a soldering absorber.5.Pull out the earth wire on the CD changer mechanism assembly.6.Disconnect the connector CN854 on the CD servo control board.7.Disconnect the card wire CN601 and the connector CN801 on the CD servo control board.
CN601
CN801
b
c
E
Rod
T.Braket
Clamper base
T.Braket Disc stopper
Lod stopper(C/J version only)
Clamper ass'y
b
a
C C
B'
D
C
d
Lock lever
Return spring
CD servo control board
CN651
CN854
aa
A
A
AA
CN151
CN652
B
Earthwire
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-21
11.
12.
Check whether the lifter unit stopper has been caught into the hole at the section "e" of CD tray assembly as shown in Fig.5.Make sure that the driver unit elevator is positioned as shown in Fig.6 from to the second or fifth hole on the left side face of the CD changer mechanism assembly.
Fig.5
Fig.7
Fig.6
Fig.8 Fig.9
[Caution] In case the driver unit elevator is not at above position, set the elevator to the position as shown in Fig.7 by manually turning the pulley gear as shown in Fig.8.
13.
14.
15.
Manually turn the motor pulley in the clockwise direction until the lifter unit stopper is lowered from the section "e" of CD tray assembly(See Fig.8).Pull out all of the three stages of CD tray assembly in the arrow direction "f" until these stages stop (See Fig.6).At the position where the CD tray assembly has stopped, pull out the CD tray assembly while pressing the two pawls "g and g' " on the back side of CD tray assembly(See Fig.9). In this case, it is easy to pull out the assembly when it is pulled out first from the stage CD tray assembly.
CD 3
CD 2
CD 1
CD trayassembly
e
Drive unit of elevator
CD tray assembly
f
Refer to Fig.7 Pawl
Chassis assembly
Pulley gear
Motor pulley
Pawl ,
CD tray assembly
Stopper
g
g g'
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-22
Removing the CD loading mechanism assembly(See Fig.10)
1.
2.
While turning the cams R1 and R2 assembly in the arrow direction "h" ,align the shaft "i" of the CD loading mechanism assembly to the position shown in Fig.10.Remove the four screws F retaining the CD loading mechanism assembly.
Removing the CD traverse mechanism (See Fig.11 and 12 )
1.
2.
For dismounting only the CD traverse mechanism without removing the CD loading mechanism assembly, align the shaft "j" of the CD loading mechanism assembly to the position shown Fig.11 while turning the cam R1 and R2 assembly in the arrow direction "k" .By raising the CD loading mechanism assembly in the arrow direction "l", remove the assembly from the lifter unit
Fig.10
Fig.12
Fig.11
Fig.13
Removing the CD pick unit (See Fig.13 )
1.
2.
3.
4.
Move the cam gear in the arrow direction "m" . Then, the CD pickup unit will be moved in the arrow direction "n" .According to the above step, shift the CD pickup unit to the center position.While pressing the stopper retaining the shaft in the arrow direction "o" , pull out the shaft in the arrow direction "p".After dismounting the shaft from the CD pickup unit, remove the CD pickup unit
Cams R1, R2 assembly
i
CD loading mechanism assembly
h
FF
F F
Arrow
Lifter unit
CD traverse mechanism
l
n
o p
m
Arrow
Cam R1, R2 assembly
kArrow
j
CD Pickup unit
CD loadingmechanism
Shaft
Cam gear
ShaftShaft
Stopper Stopper
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-23
Removing the try select switch board (See Fig.14)
1.
2.
Remove the two screws G retaining the tray select switch board.Disconnect the tray select switch board from connector CN804 on the CD servo control board.
Fig.15
Fig.14
Fig.16
Removing the cam unit (See Fig.15 ~17 )
1.2.
3.4.
5.
Remove the CD loading mechanism assembly.While turning the cam gear "q", align the Paul "r" position of the drive unit to the notch position(Fig.16) on the cam gear "q".Pull out the drive unit and cylinder gear(See Fig.17).While turning the cam gear "q", align the Paul "s" position of the select lever to the notch position(Fig.18) on the cam gear "q".Remove the four screws H retaining the cam unit(cam gear "q" and cams R1/R2 assembly)(See Fig.18).
Cam gear qDrive unit
r
G
H
J
H
Chassis assembly
Tray select switch board
CN854
CN851
CN804
Cylinder gear
Drive unit
Fig.17
Select lever
Cams R1, R2 assemblyCam unitCam gear q
s
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-24
Fig.18
Fig.20Fig.19
Fig.21
[Note] When the chassis assembly is turned over under the conditions wherein the gear bracket and belt have been removed, then the pulley gear as well as the gear, etc. constituting the gear unit can possibly be separated to pieces. In such a case, assemble these parts by referring to the assembly and configuration diagram in Fig. 21.
Removing the actuator motor and belt (See Fig.18~21)
1.
2.
3.
4.
5.
Remove the two screws I retaining the gear bracket (See Fig.18).While pressing the pawl "t" fixing the gear bracket in the arrow direction, remove the gear bracket (See Fig.18).From the notch "u section" on the chassis assembly fixing the edge of gear bracket, remove and take out the gear bracket(See Fig. 19).Remove the belts respectively from the right and left actuator motor pulleys and pulley gears(See Fig. 18).After turning over the chassis assembly, remove the actuator motor while spreading the four pawls "v" fixing the right and left actuator motors in the arrow direction(See Fig. 20).
Pulley gear
Belt
Motor pulley
BeltPulley gear
Motor pulley
Gear bracket
t
I
I
Pawl
v
Actuator motor
v
Chassis assembly
u
Gear bracket
Pulley gear
Gear B
Cylinder gear
Gross gear U
Gear CGross gear LSelect gear
Gear B
Gear C
Pulley gear
Assembly and Configuration Diagram
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-25
Fig.22
[Caution] To reassemble the cylinder gear, etc.with the cam unit (cam gear and cans R1/R2 assembly), gear unit and drive unit, align the position of the pawl "x" on the drive unit to that of the notch on the cam gear "q". Then, make sure that the gear unit is engaged by turning the cam gear "q" (See Fig. 24).
Removing the cams R1/R2 assembly and cam gear q(See Fig.22)
1.
2.
3.4.
Remove the slit washer fixing the cams R1 and R2 assembly.By removing the two pawls "w" fixing the cam R1, separate R2 from R1.Remove the slit washer fixing the cam gear "q".Pull out the cam gear "q" from the C.G. base assembly.
Removing the C.G. base assembly (See Fig.22 and 23)
Remove the three screws J retaining the C.G. base assembly.
Fig.23
Slit washer
Pawl
Cam R2Slit washer
Cam gear q
Cam switch board
C.G. base assembly
Cam R1Pawl
Cam gear q
Notch
Cylinder gear
Gear bracket
Cam R1, R2 assembly
Gear unit
Drive unit
xPawl
ww
J
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-26
< Cassette mechanism section >
Removing the playback,recording and eraser heads (See Fig.1~3)
1. While shifting the trigger arms seen on the right side of the head mount in the arrow direction,turn the flywheel R in counterclockwise direction until the head mount has gone out with a click (See Fig. 1).2. When the flywheel R is rotated in counterclockwise direction, the playback / recording & eraser head will be turned in counterclockwise direction from the position in Fig.2 to that in Fig.3.3. At this position, disconnect the flexible P.C.board (outgoing from the playback head) from the connector CN301 on the head amp. and mechanism control P.C. board.4. Remove the flexible P.C.board from the chassis base.5. Remove the spring "a" from behind the playback / recording head.6. Loosen the reversing azimuth screw retaining the playback head.7. Take out the playback head from the front of the head mount.8. The recording and eraser heads should also be removed similarly according to Steps 1~7 above.
Reassembling the playback, recording and eraser heads (See Fig.3)
1. Reassemble the playback head from the front of the head mount to the position as shown in Fig.3.2. Fix the reversing azimuth screw.3. Set the spring a from behind the playback head.4. Attach the flexible P.C.board to the chassis base as shown in Fig.3.5. The recording and eraser heads should also be reassembled similarly according to Steps 1~4 above.
Cassette mechanism
Flywheel R
Trigger armHead mount
(Mechanism A side)
(Mechanism A side)
Playback/Recording &eraser head
FlexibleP.C.board
Spring "a"
Trigger arm
Head amplifier & mechanismcontrol P.C. board
Flywheel R
CN301
Fig.1
Fig.2
Playback head Reversing azimuthscrew
Headmount
FlexibleP.C.board
Spring "a"
FPC holderHead amplifier &mechanism controlP.C. board
CN302
(Mechanism B side)Fig.3
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-27
Removing the head amp. and mechanism control board (See Fig. 4)
1.Remove the cassette mechanism assembly.2.After turning over the cassette mechanism assembly,remove the five screws "A" retaining the head amplifier & mechanism control board.3.Disconnect the connectors CN303 on the board and the connectors CN301 and on CN302 both the right and left side reel pulse boards.4.When necessary, remove the 4pin parallel wire soldered to the main motor
Removing the capstan motor assembly (See Fig.5 to 7)1.Remove the six screws "B" retaining capstan motor assembly (See Fig. 5).2.While raising the capstan motor, remove the capstan belts A and B respectively from the motor pulley (See Fig. 6).
Caution 1: Be sure to handle the capstan belts so carefully that these belts will not be stained by grease and other foreign matter. Moreover, these belts should be hand while referring to the capstan belt hanging method.(See Fig.6 and 7)
Flexibleboard
Flexibleboard
CN302 CN301
CN303
Head amplifier &mechanism control board
Capstan motorassembly
Capstanbelt A
Capstanbelt B
Motor pulley
Capstanbelt A
Capstanbelt B
Capstan motor
A A A
AA
B B
BBBB
Fig.4
Fig.5
Fig.7 Fig.6
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-28
Removing the capstan motor (See Fig. 8)
From the joint bracket, remove the two screws "C"retaining the capstan motor.
Removing the flywheel (See Fig. 9,10)
1.Remove the head amp. and mechanism control P.C.Board.2.Remove the capstan motor assembly.3.After turning over the cassette mechanism, remove the two slit washers "b" fixing the capstan shafts R and L, and pull out the flywheels R and L respectively from behind the cassette mechanism.
Removing the reel pulse board and solenoid(See Fig. 11)
1.Remove the five pawls (c,d,e,f,g) retaining the reel pulse P.C.Board.2.From the surface of the reel pulse P.C.Board parts, remove the two pawls "h" and "i" retaining the solenoid.
Capstan motor
Jointbracket
Flywheel R Flywheel L
Flywheel R Flywheel L
Slitwasher "a"
Slitwasher "b"
Reel pulse board
Solenoid
Solenoid
C
C
a b
c d e f g
h i
Fig.8
Fig.9
Fig.11
Fig.10
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-29
Adjustment method
Measurement instruments required for adjustment
Measurement conditionsPower supply voltage AC110/127/230-240V(50/60Hz): US,UN model
Measurementoutput terminal : Speaker out : TP101(Mesuring for TUNER/DECK/CD) : Dummy load 6ohm
Radio input signalAM modulation frequency : 400HzModulation factor : 30%FM modulation frequency : 400HzFrequency displacement : 22.5kHz
Frequency RangeAM 531kHz~1710kHz : US,UN model
FM 87.5MHz~108MHz
Standard measurement positions of volumeand switchPower : Standby (Light STANDBY Indicator)Sub woofer VOL. : MinimumSound mode : OFFMain VOL. : 0 MinimumTraverse mecha set position : Disc 1Mic MIX VOL : MAX (Only US,UN ver.)ECHO : OFF
Precautions for measurement1. Apply 30pF and 33kohm to the IF sweeper output side and 0.082 F and 100kohm in series to the sweeper input side.2. The IF sweeper output level should be made as low as possible within the adjustable range.3. Since the IF sweeper is a fixed device, there is no need to adjust this sweeper.4. Since a ceramic oscillator is used, there is no need to perform any MPX adjustment.5. Since a fixed coil is used, there is no need to adjust the FM tracking.6. The input and output earth systems are separated. In case of simultaneously measuring the voltage in both of the input and output systems with an electronic voltmeter for two channels, therefore, the earth should be connected particularly.7. In the case of BTL connection amplifier, the minus terminal of speaker is not for earthing. Therefore, be sure not to connect any other earth terminal to this terminal. This system is of an OTL system.
1. Low frequency oscillator, This oscillator should have a capacity to output 0dBs to 600ohm at an oscillation frequency of 50Hz-20kHz. 2. Attenuator impedance : 600ohm 3. Electronic voltmeter 4. Frequency counter 5. Wow flutter meter 6. Test tape VT703L : Head azimuth VT712 : For Tape speed and wow flutter ( 3kHz) VT724 : For Reference level (1kHz) VT703L : For Head angle(10kHz)7. Blank tape TAPE : AC-225, 8. Torque gauge : For play and back tension Forward ; TW2111A, Reverse ; TW2121A Fast Forward and Rewind ; TW2231A9. Test disc : CTS-1000(12cm),GRG-1211(8cm)10. Jitter meter
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-30
Arrangement of adjusting positions
Cassette mechanism section (Mechanism A section) Cassette mechanism section (Back side)
Cassette Mechanism Unit Section
Head azimuthadjusting screw(Forward side)
Head azimuthadjusting screw(Reverse side)
Head azimuthadjusting screw(Forward side)
Head azimuthadjusting screw(Reverse side)
Playbackhead
Playback, recording and eraserheads or playback head
Tape speed ADJ
Bias ADJ L
Bias ADJ R
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-31
1.Playback the test tape VT703L.2.With the playback mechanism or recording & playback mechanism, adjust the head azimuth screw so that the forward and reverse output levels become maximum.After adjustment,lock the head azimuth at least by half a turn.3.In either case,this adjustment should be performed in both the forward and reverse directions with the head azimuth screw.
<Constant speed>Adjust VR301 so that the frequency counter readingbecomes 3,000Hz 60Hz when playing back the test tape VT712(3kHz)with the playback mechanismor playback and recording mechanism after endingforward winding of the tape.
Confirmationof head angle
Confirmationof tape speed
Test tape:VT7036LMeasurementoutput terminal:Speaker terminalSpeaker R(Load resistor:6 ):Headphone terminal
Test tape:VT712(3kHz)Measurementoutput terminal:Headphone terminal
Maximumoutput
Tape speedof decks(A and B):3,000Hz 60Hz
Adjust the headazimuth screwonly when the head has beenchanged.
VR301
Items Measurementconditions Measurement method Standard
valuesAdjustingpositions
Tape recorder section
Items Measurementconditions Measurement method Standard
valuesAdjustingpositions
After setting to the double speed motor, confirmthat the frequency counter reading becomes4,800+400/-300Hz when the test tape VT712(3kHz) has been play back with the playbackmechanism.
When the test tape VT712(3kHz) has been playedback with the playback mechanism or recording andplayback mechanism at the beginning of forwardwinding, the frequency counter reading of the difference between both of the mechanisms shouldbe 6.0Hz or less.
When the test tape VT712(3kHz) has been playedback with the playback mechanism or recording andplayback mechanism at the beginning of forwardwinding the frequency counter reading of wow &flutter should be 0.25% or less(WRMS).
Double tapespeed
Differencebetween theforward andreverse speed.P.mecha andR/P mechaspeed
Wow & flutter
Test tape:VT712(3kHz)Measurementoutput terminal:Speaker terminalSpeaker R(Load resistance:6 )measurementoutput terminal:Headphone terminal
Test tape:VT712(3kHz)Measurementoutput terminal:Headphone terminal
4,800+400/-300Hz
60Hz orless
with in 0.25%JIS(WTD)
Playback
mechanism side
Both the playback
and recording &
playback
mechanism
Both the playback
and recording &
playback
mechanism
Reference values for confirmation items
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-32
Items Measurementconditions Measurement method Standard
valuesAdjustingpositions
1.With the recording and playback mechanism, load the test tapes(AC-225 to TYP ),and set the mechanism to the recording and pausing conditions in advance.2.After connecting 100 in series to the recorder head,measure the bias current with a valve voltmeter at both of the terminals.3.After resetting the [PAUSE] mode,start recording. At this time,adjust VR101 for LcH and VR201 for RcH so that the recording bias current values become 4.0 A (TYP ).
1.With the recording and playback mechanism,load the test tape(AC-225 to TYP ),and set the mechanism to the recording and pausing condition in advance.2.While repetitively inputting the reference frequency signal of 1kHz and 10kHz from OSC IN, record and playback the test tape.3.While recording and playing back the test tape in TYP ,adjust VR101 for LcH and VR201 for RcH so that the output deviation between 1kHz and 10kHz becomes -1dB 2dB.
Adjustment ofrecording biascurrent(Referencevalue)
Adjustment ofrecording andplaybackfrequencycharacteristics
*Mode : Forward or reverse mode*Recording mode*Test tape : AC-225 Measurement outputterminal :Both recording and headphone terminals
Reference frequency:1kHz and 10kHz (REF:-20dB)Test tape:TYP AC-225Measurement inputterminal:OSC IN
AC-225:4.20 A
Outputdeviationbetween1kHz and10kH:-1dB 2dB
LcH:VR101RcH:VR201
LcH:VR101RcH:VR201
Electrical performance
Items Measurementconditions Measurement method Standard
valuesAdjustingpositions
1.While changing over to and from BIAS 1 and 2, confirm that the frequency is changed.2.With the recording and playback mechanism. load the test tape (AC-225 to TYP ),and set the mechanism to the recording and pausing conditions in advance.3.Confirm that the BIAS TP frequency on the P.C.board is 100kHz 6kHz.
1.With the recording and playback mechanism, load the test tapes(AC-225 to TYP ),and set the mechanism to the recording and pausing condition in advance.2.After setting to the recording conditions,connect 1M in series to the eraser head on the recording and playback mechanism side,and measure the eraser current from both of the eraser terminal.
Recordingbias frequency
Eraser current(Referencevalue)
*Recording andplayback side forwardor reverse*Test tape:TYP AC-225*Measurement terminal BIAS TP onP.C.board
*Recording and playback side forward or reverse*Recording mode*Test tape:AC-225Measurement terminalBoth of the eraserhead
100kHz+9kHz-7kHz
TYP:75mA
Reference values for electrical function confirmation items
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-33
Flow of functional operation until TOC read
Slider turns REST SW ON.
Automatic tuningof TE offset
Laser ON
Detection of disc
Automatic measurement ofFocus S-curve amplitude
Automatic tuning of Focus offset
Disc is rotated
Focus servo ON(Tracking servo ON)
Automatic tuning ofTracking error balance
Automatic measurement ofTracking error amplitude
Automatic tuning ofFocus error balance
Disc to bebraked to stop
Trackingservoon states
Trackingservooff states
Disc statesto rotate TOC reading
finishesAutomatic measurementof TE amplitude and automatic tuning ofTE balance
500mv/div 2ms/div Fig.1
Approx.3secpin 25 ofIC601(TE)
Approx 1.8V
VREF
Tracking error waveform at TOC reading
Power ON Play Key
Confirm that the Focus errorS-cuve signal at the pin28 ofIC651 is approx.2Vp-p
Confirm that the signal frompin24 IC651 is 0V as a accelerated pulse during approx.400ms.
Confirm the waveform ofthe Tracking error signal.at the pin 25 of IC601 (R604)(See fig-1)
Automatic tuning ofFocus error gain
Automatic tuning ofTracking error gain
TOC reading
Play a disc
Confirm the eys-patternat the lead of TP1
Confirm that the voltage at the pin5
of CN801 is "H"\"L"\"H".
Check Point
Check that the voltage at the
pin40 of IC651 is + 5V?
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-34
Turn off the power switch and, disconnect thepower cord from the ac outlet.
Replace the pickup with a normal one.(Refer to "Pickup Removal" on the previous page)
Plug the power cord in, and turn the power on.At this time, check that the laser emits for about 3seconds and the objective lens moves up and down.Note: Do not observe the laser beam directly.
Play a disc.
Check the eye-pattern at TP1.
Finish.
Maintenance of laser pickup
(1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab.
(2) Life of the laser diode When the life of the laser diode has expired, the following symptoms will appear. 1. The level of RF output (EFM output : ampli tude of eye pattern) will below.
Is the level ofRFOUT under
1.25V 0.22Vp-p?Replace it.
NO
YES
O.K
(3) Semi-fixed resistor on the APC PC board The semi-fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power. Since this adjustment should be performed to match the characteristics of the whole optical block, do not touch the semi-fixed resistor. If the laser power is lower than the specified value, the laser diode is almost worn out, and the laser pickup should be replaced. If the semi-fixed resistor is adjusted while the pickup is functioning normally, the laser pickup may be damaged due to excessive current.
Replacement of laser pickup
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-35
1 2 3 4 5 6 7 8 9 10 11 12
131415161718192021222324
AMP
PreSourceCTRL
AMPALC
ALCAMPAMP
EQ
CTRL ALC
REPPLEREJ
Pre
Pre
L1 L2
R1 R2 NF2
NF1 OUT1
OUT2
EQ1
EQ2 CTL2
CTL1
RIN2
RIN1
RNF2
RNF1
ROUT2
ROUT1
LC LPF GND
EQCTL RF VCC
AN7345K (IC302) : PB/REC amp.
2. Pin Function
PinNo. Symbol I/O Function FunctionI/OSymbol
PinNo.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
I
I
16
17
18
19
20
21
22
23
24 I
I
O
I
I
Playback amplifier output
I
I
I
RIN1
OUT1
1. Block diagram
Playback amplifier inputR1
R2 I Playback amplifier input
NF2 Playback amplifier negative feedback
OUT2 Playback amplifier output
EQ2 I Equlaizer
CTL2 I Pre Amplifier input swithing time
constant
RIN2 I Recording amplifier input
RNF2 I Recording amplifier negative feedback
ROUT2
O
Recording amplifier outputO
LC I ALC low cut
LPF I ALC low pass filter
GND I
Vcc Power supply
RF I Repple filter
EQCTL EQ control
ROUT1 O Recording amplifier output
RNF1 Recording amplifier negative feedback
I Recording amplifier input
CTL1 Pre amplifier input swithing control
EQ1 Equlayzer
Playback amplifier negative feedbackNF1
L2 I
L1
Playback amplifier input
Playback amplifier input
Description of major ICs
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-36
12345678
9,1011
12,131415
16~192021222324252627282930313233343536373839
40~41424344
45,4647484950
KCMNDMSTATKCLK
DATAOUTDATAIN
CKBEATVDD
OSC2,1VSS
XI,XOMMODVREF-
KEY1~4SLCKEY1SLCKEY2SLCKEY3
SPIVREF+MRDYRESETP OPENP CLOSEVOLLED
MSIECHO2ECHO1REMIN
PHOTOAPHOTOB
INHRDSCLK
PRTEXTCE
BASSVOL+/-RDS-DATA
SPIASPIB
VOL+/-MPX
FVOLDAVOLCLK
BASSLED
SVC3 Serial data outputSVC3 status input inputSVC3 Serial clock inputSLC/TUNER data outputTUNER data inputSLC/TUNER clockBeat cut signal output of TUNERPower supply +5VOscillation terminal (8MHz)Connect to GNDSub clock (32.768kHz)Connect to GNDConnect to GNDKey matrix input 1~4Tape B playback/recording detect switchTape B playback detect switchTape A playback detect switchSPI INAD port voltage referenceVC3 ReadyReset signal inputRolling panel open detection signal inputRolling panel close detection signal inputLED Control signal output (VOL)MS detector signal inputEcho ON/OFF(Not used)Echo ON/OFF(Not used)Remote control signal inputTape A mechanism running detection signal inputTape B mechanism running detection signal inputInhibit signal inputClock signal input from IC3 (B/E/EN model)Protector inputEXT IC Chip enableBass volume rotary encoder input(+/-)RDS data input from IC3(B/E/EN model)SPI Control ASPI Control BVolume rotary encoder input (+/-)Stereo detectFront volume data output
OIIOIOO-
I/O-
I/O--IIIIIIIIIIOI--IIIIII-II--IIOOO
Pin No. Symbol I/O Function
MN101C35DEA (IC810) : System controller
Pin function (1/2)
Clock signal output to IC436LED Control signal output (BASS)
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-37
51~6364~87
888990919293949596979899100
G13~G1P1~P24SLCCE
AUX LEDDOORCL
DOOR OPENCDLED
TAPE LEDTU LEDSMUTEBTU+POUTTUCE
VC3RESETVPP
FL grid control signal outputFL segment control signal outputSLC Chip enable signal output to IC303,IC304LED Control signal output (AUX)Rolling panel motor control signal outputRolling panel motor control signal outputLED Control signal output (CD)LED Control signal output (TAPE)LED Control signal output (TUNER)System mute control signal outputTuner supply controlPower ON/OFFTUNER Chip enable signal outputVC3 reset outputPower supply
OOOOOOOOOOOOOO-
Pin No. Symbol I/O Function
Pin function (2/2)
STROBE
DATA
CLOCK
Q1
Q2
Q3
Q4
Vss
Vdd
OUTPUT ENABLE
Q5
Q6
Q7
Q8
Q's
Qs
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1.Pin layout
8-STAGESHIFT REGISTER
8-BITLATHES
3-STATEOUTPUTS
1
2
3
15
Q1 Q8
10
9
DATA
CLOCK
STROBE
OUTPUTENABLE
PARALLEL OUTPUT
Q's
QsSERIALOUTPUT
2.Block diagram
BU4094BCF (IC303) : Serial to parallel port extension
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-38
TEN
TEOUT
TEBPF
VDET
VCCGND
FBALTBALGCTLPD
LD
VREF
RFIN
RFN4 5 6 7 8 11 12 13 14
RFOUT
RF_EQ AGC BDO OFTR
3TENV
9
10
15
22
23
21
20
NRFDET
SUBT
SUBT
BCA
BCA
BCA
BCA
GCA
GCA
GCA
GCAAMP
AMP
AMP
AMP
19
18
2
VDET
32
31
30
29
27
28
17+
-
-
+
-
+
-
+
1
316252624
-+
-+
-+
-+
A
B
C
D
E
F
A+C
B+D
F
E
CAGC ARF CBDO BDO COFTR OFTR
3TOUT
CEA
NRFDETFEN
FEOUT
1.Block diagram
2. Pin function
AN22000A-W (IC601) : Digital servo head amp.
Pin No.1234
567
89
10
Function APC amp. input terminalAPC amp. output terminalPower terminalInversion input terminal for RF addition amplifierRF add amp. output terminalAGC input terminalCapacity connecting terminal for AGC loop filerAGC output terminalCapacity connecting terminal for HPF amplifier3TENV output terminal
Pin No.2223242526272829303132
FunctionFE amp. reverse input terminalFE amp. output terminalGCTL & APC terminalFBAL control terminalTBALcontrlo terminalTracking signal input terminal 1Tracking signal input terminal 2Focus signal input terminal 4Focus signal input terminal 2Focus signal input terminal 3Focus signal input terminal 1
Pin No.11
1213
1415161718192021
FunctionFor envelope detection at the dark side of RFBDO output terminalFor envelope detection at the blight side of RFOFTR output terminalNRFDET output terminalGroundVRER output terminalVDET output terminalVDET input terminalTE amp. output terminalTE amp. reverse input terminal
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-39
LOGIC
SW2 SW1
L+R
L-R
L
R
+++
+
+
--
-
-
- +
+
+
-
-
C16
B15
A14
ROUT13
LP12
LP11
LP10
RIN9
1VCC
2MIC
3LOUT
4FK
5TK
6LIN
7BIAS
8GND
BA3837 (IC466) : Mic mixer
1.Block diagram
12345678910111213141516
VCCMIC INLOUT
FKTKLIN
BIASGNDRIN
LPF1LPF2LPF3ROUT
CONTACONTBCONTC
Power supplyMicrophone mixing inputChannel L outputNon connectNon connectChannel L inputSignal biasConnect to GNDChannel R inputConnects to LPF time constant elementConnects to LPF time constant elementLPF outpoutChannel R outputMode select input AMode select input BMode select input C
-IO--II-IOOOOIII
Pin No. Symbol I/O Description
2.Pin function
1OUT1
2-IN1
3+IN1
4
8
7
6
5VEE
VCC
OUT2
-IN2
+IN22
1
-
+ -
+
BA15218 (IC481, IC501, IC502, IC526, IC571) : Op. amp.
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-40
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
OSC
CO
UN
TE
R
A/D
SR
AM
D/A
MIX
- + - +
GND
ECHO VR
BIAS
DAINT IN
DAINT OUT
DALPF IN
DALPF OUT
MIX OUT
CR
MUTE
VCC
ADINT IN
ADINT OUT
ADLPF OUT
ADLPF IN
MIX IN
123456789101112131415161718
GNDECHO VR
BIASDAINT IN
DAINT OUTDALPF IN
DALPF OUTMIX OUTMIX IN
ADLPF INADLPF OUTADINT OUTADINT IN
VCCNC2
MUTECR
Connect GNDEcho level controlNon connectAnalog part DC biasDA side integrator inputDA side integrator outputDA side LPF inputDAside LPF outputMix AMP output for original tone& echo toneMix AMP input pin for original toneAD side LPF inputAD side LPF outputAD side integrator outputAD side integrator inputPower supplyNon connectMute control signal inputCR pin for oscillator
-I--IOIOOIIOOI--I-
Pin No. Symbol I/O Descriptions
2.Pin function
1.Pin layout & block diagram
BU9253AS (IC902) : LPF & Echo mix.
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-41
2. Pin Function
PinNo. Symbol I/O Function FunctionI/OSymbol
PinNo.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
FM IN
AM MIX
FM IF
AM IF
GND
TUNED
STEREO
VCC
FM DET
AM SD
FM VSM
AM VSM
MUTE
FM/AM
MONO/ST O
I
I/O
O
O
I
O
I
I
I
O
O
IIII
I
This is an input terminal of FM IFsignal.
This is an out put terminal for AMmixer.
Bypass of FM IF
Input of AM IF Signal.
This is the device ground terminal.
When the set is tuning, this terminal
becomes "L".
Stereo indicator output. Stereo "L",Mono: "H"
This is the power supply terminal.
FM detect transformer.
This is a terminal of AM ceramic filter.
Adjust FM SD sensitivity.
Adjust AM SD sensitivity.
When the signal of IF REQ of IC121(
LC72131) appear, the signal of FM/AM
IF output. //Muting control input.
Change over the FM/AM input.
"H" :FM, "L" : AM
Stereo : "H", Mono: "L"
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30 OSC BUFFER
AM OSC
REG
AM RF
AFC
AM AGC
O
I
O
I
I
I
AM Local oscillation Signal output.
This is a terminal of AM Localoscillation circuit.
Register value between pin 26 and pin28
desides the frequency width of the
input signal.
AM RF signal input.
This is an output terminal of voltage
for FM-AFC.
This is an AGC voltage input terminal
for AM
O
O
I
O
AM detection output.
FM detection output.
Mpx input terminal
O
O
I
Left channel signal output.
Right channel signal output.
Input terminal of the left channel post
AMP.
Input terminal of the right channel
post AMP.I
O
Mpx Left channel signal output.
Mpx Right channel signal output.
L OUT
R OUT
L IN
R IN
RO
LO
IF IN
FM OUT
AM DET
1. Block Diagram
ALC
BUFF
AM
OSC
REG
AMMIX
FMRF.AMP
AGC
AM IF DET
SDCOMP
AMS-METER
FMS-METER
FM IFPMDET
S-CLRVEAM/FMIF-BUFF
TUNING DRIVE
GND VCC
STEREO DRIVE
MUTE
DECODERANIT-BIRDIE
STEREO 5N SW
P-DET
PILOTDET
FF19k
FF19k
FF38k
VCO384KHz / 2 /LS
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
1 2 3 4 6 7 8 9 10 11 12 13 14 155
LA1838 (IC1) : FM AM IF amp. & detector, FM MPX decoder
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-42
24 23 22 21 20 19Gnd
18 17 16 15 14 13
7 8 9 10 11 12Gnd
1 2 3 4 5 6
Levelshift
B T Ldriver
Levelshift
B T Ldriver
B T Ldriver
11kohm
11kohm
Levelshift
B T Ldriver
Levelshift
Regulator
RESET
11kohm
11kohm
- +- +
Vcc
Vcc Vref Vin4 Vg4 Vo8 Vo7
Vcc Mute Vin1 Vg1 Vo1 Vo2 Vo3 Vo4 Vg2 Vin2 Reg out
Reg In
Vo6 Vo5 Vg3 Vin3 Cd Res
LA6541-X (IC801) : Servo driver1. Pin Layout & block diagram
2. Pin function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Vcc
Mute
Vin1
Vg1
Vo1
Vo2
Vo3
Vo4
Vg2
Vin2
Reg Out
Reg In
Res
Cd
Vin3
Vg3
Vo5
Vo6
Vo7
Vo8
Vg4
Vin4
Vref
Vcc
Power supply (Shorted to pin 24)
All BTL amplifier outputs ON/OFF
BTL AMP 1 input pin
BTL AMP 1 input pin (For gain adjustment)
BTL AMP 1 input pin (Non inverting side)
BTL AMP 1 input pin (Inverting side)
BTL AMP 2 input pin (Inverting side)
BTL AMP 2 input pin (Non inverting side)
BTL AMP 2 input pin (For gain adjustment)
BTL AMP 2 input pin
External transistor collector (PNP) connection. 5V power supply output
External transistor (PNP) base connection
Reset output
Reset output delay time setting (Capacitor connected externally)
BTL AMP 3 input pin
BTL AMP 3 input pin (For gain adjustment)
BTL AMP 3 output pin (Non inverting side)
BTL AMP 3 output pin (Inverting side)
BTL AMP 4 output pin (Inverting side)
BTL AMP 4 output pin (Non inverting side)
BTL AMP 4 output pin (For gain adjustment)
BTL AMP 4 output pin
Level shift circuit's reference voltage application
Power supply (Shorted to pin 1)
PinNo. Symbol Function
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-43
1. Pin layout1234567891011
2221201918171615141312
XTFM/AM
CEDI
CLOCKDO
FM/ST/VCOAM/FM
SDIN
XTGNDLPFOUTLPFINPDVCCFMINAMIN
IFCONTIFIN
PinNo.
1
2
3
4
5
6
7
8
9
10
11
PinNo.
12
13
14
15
16
17
18
19
20
21
22
Symbol
XT
FM/AM
CE
DI
CLOCK
DO
FM/ST/VCO
AM/FM
LW
MW
SDIN
Symbol
IFIN
IFCONT
AMIN
FMIN
VCC
PD
LPFIN
LPFOUT
GND
XT
Function
X'tal oscillator connect (75kHz)
LOW:FM mode
When data output/input for 4pin(input) and
6pin(output): H
Input for receive the serial data from
controller
Sync signal input use
Data output for Controller
Output port
"Low": MW mode
Open state after the power on reset
Input/output port
Input/output port
Data input/output
Function
IF counter signal input
IF signal output
Not use
AM Local OSC signal output
FM Local OSC signal input
Power suplly(VDD=4.5-5.5V)
When power ON:Reset circuit move
PLL charge pump output(H: Local OSC
frequency Height than Reference frequency.
L: Low Agreement: Height impedance)
Input for active lowpassfilter of PLL
Output for active lowpassfilter of PLL
Connected to GND
X'tal oscillator(75KHz)
I/O
I
O
I
I
I
O
O
O
I/O
I/O
I/O
I/O
I
O
-
I
I
-
O
I
O
-
I
ReferenceDriver
PhaseDetector
Charge Pump
UnlockDetector
UniversalCounter
Swallow Counter1/16,1/17 4bit
12bitProgrammable
DriverS
Swallow Counter1/16,1/17 4bit
Data Shift Register & Latch
Poweron
Reset
C2BI/F
1/2
7 8 2 11 13
21
17
6
5
4
3
15
16
22
1 18
19
20
12
2. Block diagram
3. Pin function
LC72136N (IC2) : PLL frequency synthesizer
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-44
1
4
R1
TR1
TR3
TR2
TR4
TR5
TR6
TR8
R8C2
TR14 TR15
TR16
R14
R11
R13
R12
R10
R9
TR9
TR10
TR12
TR13
TR11
TR7
C1
D1
R6
R3
R4
R5
R7
13 11 14 15
9
8
125 67 10
2
R2
SUB
STK402-050[MX-GT98/95V], STK402-030[MX-GT88/85V, MX-G78/75V] (IC601): Power amp.
1.Pin layout
2.Block diagram
1 15
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-45
TR
1T
R2
R1
C1
TR
3T
R4
D6
R3
TR
6
C2
R4
R5
TR
5
R2
D1
R6
TR
7
R7
TR
9
TR
10T
R8
TR
20
R13 R
16
R19
TR
18
R14
R15
R16
TR
17
R17
D12
TR
12T
R11
C11
C12
R11
TR
14T
R13
TR
15 R12
TR
41R
41
D41 D51
TR
32
R31C
ompa
rato
r
Com
para
tor
D53
D52D42
D43
SU
B
1 3 2 7 5 4 6
129
811
10
1813
17
14 15 16
STK412-010[MX-GT98V/GT95V], STK412-000[MX-GT88V/GT85V],STK412-090[MX-G78V/G75V] (IC701) : Power amp.
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-46
11
12
13
14
10
9
8
7
15 16 27 26 25 23 24
6
30
1
29
5
34
222212019281817
L-IN1
L-IN2
L-IN3
L-IN4
R-IN1
R-IN2
R-IN3
R-IN4
MU
XO
UT
INR
TR
EB
LE(R
)
MIN
(R)
MO
UT
(R)
BIN
(R)
BO
UT
(R)
CR
EF
AGND
Vs
ROUT
DIG-GND
SDA
SCL
LOUT
BO
UT
(L)
BIN
(L)
MO
T(L
)
MIN
(L)
TR
EB
LE(L
)
INL
MU
XO
UT
VOLUME
VOLUME
TREBLE
TREBLE
MIDLE
MIDLE
SPEAKERATTRIGHT
SPEAKERATTLEFT
BASS
BASS
SUPPLY
G
G
I C BUS DECODER LATCHES20/30dB
2dB STEP
INPUT MULTIPLEXER GAIN
CSLDIG GNDTREBLE(R)TREBLE(L)MIN(L)MOUT(L)BOUT(L)BIN(L)BOUT(R)BIN(R)MOUT(R)MIN(R)INRMUXOUTRINL
SDACRE
VsAGNDROUTLOUTR-IN4R-IN3R-IN2R-IN1L-IN1L-IN2L-IN3L-IN4
MUXOUTL TDA7439
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
TDA7439 (IC436) : Control volume
1.Pin layout
2.Block diagram
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-47
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
BIASC
VREFC
RPEF
NC
NC
NC
CIN
AIN
VCC
SPI-A
SPI-B
SPI-C
SPICSB
NC
NC
TEST
AOUT
GND
Decoupling condenser connection terminal.
Decoupling condenser connection terminal.
Reference resistance connection terminal.
Non connect.
Non connect.
Non connect.
Connected to GND of audio system through a condenser.
Inputs the audio signal through a condenser.
Power supply terminal.
Output selection control terminal.
Output selection control terminal.
Output selection control terminal.
Output selection control terminal.
Non connect.
Non connect.
Connected to GND upon normal use.
Multi-plexor output terminal.
Connect to GND.
-
-
-
-
-
-
-
I
-
O
O
O
O
-
-
-
O
-
No. Symbol I/O Function
2.Pin Function
1.Block Diagrams
BA3835S[MX-GT98/95V] (IC812) : SPI B.P.F.
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
BIAS
VREF
REFERENCECURRENT
MPXA-C
RES
PEAKHOLD
105HzBPF
RES
PEAKHOLD
340HzBPF
RES
PEAKHOLD
1kHzBPF
RES
PEAKHOLD
3.4kHzBPF
RES
PEAKHOLD
10.5kHzBPF
DIF
DEC
BIASC
VREFC
RREF
N.C.
N.C.
DIFOUT
CIN
AIN
VCC A
B
C
SEL
N.C.
N.C.
TEST
AOUT
GND
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-48
1
2
3
4
5
6
7
8
9 10
11
12
13
14
15
16
17
18Vss
DATA
CLOCK
LCK
Q0
Q1
Q2
Q3
Q4
VDD
OE
Q11
Q10
Q9
Q8
Q7
Q6
Q5
CONTROLCIRCUIT
OU
TP
UT
BU
FF
ER
(OP
EN
DR
AIN
)
12B
IT S
TR
AG
E R
ES
IST
ER
12B
IT S
HIF
T R
ES
IST
ER
1.Terminal Layout
1
2
3
4
5~16
17
18
Vss
DATA
CLOCK
LCK
Q0~Q11
OE
VDD
-
I
I
I
O
I
-
GND
Serial Data input
Shift Clock of Data (Rise Edge Trigger)
Latch Clock of Data (Rise Edge Trigger)
Parallel Data Output (Nch Open Drain FET)
Output Enable (Output FET "H" Level is OFF)
Power Supply
Pin No. Symbol I/O Function
Latch Data L HOUTPUT ON OFF
2.Pin Function
BU2092/F (IC811) : Port expander
BA3126N (IC301) : R/P switch
R E
CS
W
G
1 2 3 4 5 6 7 8 9
P /
BS
W
P /
BS
W
G R E
CS
W
C O
N T
.
G N
D
V c
c
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
1-49
1 2 3 4 5 6 7 8 9 10
GND OUT1 P1 VZ IN1 IN2 VCC1 VCC2 P2 OUT2
Input OutputMode
IN1 IN2 OUT1 OUT2
Brake0 0 0 0
1 0 1 0
0 1 0 1
1 1 0 0
CLOCKWISE
COUNTER-CLOCKWISE
Brake
LB1641 (IC851, IC852) : DC motor driver
1. Pin layout
2. Pin function
1 2 3 4 5 6 7 8
1. A OUTPUT
2. A-INPUT
3. A+INPUT
4. V
5. B+INPUT
6. B-INPUT
7. B OUTPUT
8. V+
-
NJM4580L[US ver. only] (IC901) : Mic amp.
200109(V)
VICTOR COMPANY OF JAPAN, LIMITEDAUDIO & COMMUNICATION BUSINESS DIVISIONPERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.21026)
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
A B C D E F G
1
2
3
4
5
2-1
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
Block diagram
FM FRONTEND TU1
FM/DETAM/DET IC 1
MW RF/OSC COIL
PLLSynthesizer IC2
TUNER
MPX
CD
AUXAUXIN
VIDEOOUT
MAIN
FOCUS/SPINDLE/FEED/TRACKINGBTL DRIVER IC801
SOURCE SELECTOR& E.VOL IC436
MAIN HPFMUTE SYSTEM IC481
INPUT AMP IC 501
HARMONICSGENERATOR IC 502
LPFIC 526
CN870/CN871CN661 CN504
FW
714
CN
215
CN
205
CN
207
CN
217
CN
706
J81
RELAY RY2
RELAY RY1
SP
EA
KE
R T
ER
MIN
AL
POWER AMP IC 701
SUB WOOFER
POWER AMP IC602
MAIN
CN
1
CN
11
CN
801
CN
601
CN
854
CN
855
P011
P001
CN
804
CN
805
RF & SERVO AMPIC601
DIGITAL SERVO&
PROCESSORIC 651
UNIT MICOMCD CHANGERCONTROL IC 251
L MOTOR DRIVER
IC 851
R MOTOR DRIVER
IC 852
CN651 CN151
CN101
CN102
IC101VCD PROCESSOR
IC102EPROM
IC103DRAM
IC104VCD CONPANION CHIP
CN860/CN861
CAM0 3
CAM4 7
1SSW 3SSW1MSW 3MSW
A+CB+DE F
FT
FM SM
ARF
TX
CD
L CAM
R CAM
SW1 6
PICKUP
TRACKINGFOCUS
FEED
M
MICOMIC 810
FL DISPLAYFL 801
CN
880
CN
870
CN
911
FW
901
FW
915
FW
915 KEY
LED
SEARCHKNOB
LED
MAIN VOLWOOFER VOLSOUND MODE
KEY
LED
KEY1,11 CD1LEDCD2LEDCD3LED
SEARCH R,FKEY21,22
VOLKEY2,3,21,32,41,42
KCMNDMSTATKCLKMRDY
MPX
VOLDA,VOLCK
M
M
FMN-011A
FMV-010AM FMB-028-3
FM
AM
DIGITALOUT
TX
SPINDLE
M
FMB-028-1
FMC-027-1FMA-006FMH-031-2 FMH-
031-1FMB-028-4
FMH-031-3
FMB-028-2
CN315
IF
TAPE
CN316
CN306CN305
PB/REC AMPIC302
HEAD SWIC301
SERIAL TO PARALLELPORT EXTENSION
IC303SOLENOID DRIVE FOR RP MECHA
Q3314 Q3315
SOLENOID DRIVE FOR PB MECHAQ3312 Q3313
CN
301
CN
302
FW
301
CN
303
CN
333
MDRIVER
R
L
R
L
PB MECHA HEAD
RP MECHA HEAD
SLCKEY 1~2
SLCKEY1 2PHOTO A,B
SW302SW306
IC331
SOLENOID
SW303SW304SW305SW316
SOLENOID
IC332
SLCKEY2PHB
SLCK
PHA
PB MECHA
PP MECHA
FMP-007-2FMP-007-1
MIC JACK 1,2(Only US)
LPF& ECHO MIXIC902
KARAOKEIC446
MIC
MIC
HA B C D E F G
1
2
3
4
5
2-2
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
Power supply sectionStandard schematic diagrams
SHEET 1/9
Parts are safety assurance parts.When replacing those parts makesure to use the specified.
SHEET 1/9
SHEET 2/9
CN218
CN220
F003
F001
T001
F101
F102
CN214
CN208
R1002
CN250
CN
219
CN
209
QGA3901C1-03
QGD2504C1-03Z
T2AL
T4AL
T4AL
T4AL
QJK015-071214
WJK0114-001A
0.33( 1/2W)
QGA7901C1-02Q
GA
7901
C1-
04
WJK
0070
-002
A
A B C D E F G
1
2
3
4
5
2-3
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
DC regulation & Audio output section
Parts are safety assurance parts.When replacing those parts makesure to use the specified.
SHEET 5/9
SHEET 3/9
SHEET 3/9
SHEET 3/9
SHEET 1/9MAIN signal
SHEET 2/9SHEET 2/9
C739
CN205
CN215
CN204
CN201 CN217RY1
RY2
CN207
Q737
R248
Q360
IC301
Q361
R360
R361
R364
R367
R366 R365R368
R362
Q362
Q372
R311
R389
R306
IC304
Q374
Q601
R249
C601 C602
R302
R309
IC303 IC305
L201
EP201
R384 C373
IC701
C731
D233R246
R247
C216
R778
R202D227
D218
C219
Q201
R707
C709
IC602
C706
R715
C705
R792
R786
Q240
C281
R242
D725
Q733
Q736
Q734
Q735
Q726
Q728Q727
R736
R734
R733
R735
R728
R739
R740D703 D704
R775
R776
C721
C722
Q713
R761
C730
R762
R680
Q711
D650
R708
C710
R716
D622
Q702
R602
R681
R682
C683
Q680
D726
R281
R220
C606C605
R675
R676
C621
C622
R608
C610
R284
C280
D280
R616
R640
R639
R607
C609
R615
Q790
R668
Q612
R797
R798
CN705
R61
9
CN
202
R75
3
R75
4
R62
1
CN
703
J81
R74
1
R74
2
CN
704
CN
706
R36
3
D36
2
D36
0
D36
1
C36
2
C36
0 C36
1
C30
9
Q37
3
D61
9
C31
0
D31
4
R61
7
R62
0D
620
R62
3
Q60
2
R61
8
C30
2 D30
8
C30
1
CN
206
CN
216
C30
8
D31
3
C30
7
C31
1
C31
2
D31
5
R38
5
D36
9
D37
0
C37
4
C37
2
D31
6
C62
3
C62
4
R21
6
C25
3
Q71
2
D23
4
R21
5
C22
2
C22
1
C22
0
C21
8
C21
7
C20
4
C21
4
C21
1
C21
2
C21
3
C20
3
C20
2
C20
1
C72
3
R20
3
R20
4
R20
5
D21
7
C21
5
C20
5
D22
0
D21
9
C72
6
C70
7R
705
C71
3C
715
R77
4
R71
3
R72
1
R71
9R
717
D71
9Q70
1
L701
C61
2
D72
3
D72
4
R77
7
R78
7
R73
0
R72
9
R72
7
C72
9
D72
8
R72
5
R72
6
R72
3
R72
4
R70
2R70
1
C71
1
C71
2
R70
3
R76
6 R70
4
C70
3C
704
Q71
0
R21
7
R76
8
R70
6
R60
1
C70
8
C71
4C
716
R71
4
R76
9
R72
2
R72
0R
718
D72
0
L702
C61
1
R67
4
R21
8
R60
3R
604
C60
3C
604
R60
6C
608
R79
4
C61
4C
616
R28
3
R61
4
R65
5
D79
0R
790
L602
C63
9
R66
6
R60
5C
607
C61
3C
615
R61
3
R65
3
L601
C79
0
R66
7
Q61
3
R79
3
R79
5
R79
6Q
791 Q
792
1/50
QGB2510J1-14
QGB2510K2-14
QGA3901C1-07
QGB2510J1-11QGB2510K2-10
QSK0109-001
QSK0109-001
QGB2510J1-10
KRA111M-T
1
2SD2395
KIA78R05PI
KTC3199/GL
2.2
4.7
1.2K
1.2K
200 200
330
MTZJ5.1B
330
KTC3199/GL
KTA1023
10K
10K
0.33
KIA7812API
KRC104M-T
1
0.022 0.022
2.2
0.33( 1/2W)
KIA7808API KIA7809API
QQR0779-001Z
QNZ0136-001Z
2.7K 0.01
0.022
2A02M1
1
100/35
10K
2.2
1N4003S-T5
1N4003S-T5
0.01
2SA934/QR/-T
56K
4.7p
220P
10
220P
1K
10K
KTC3199/GL/-T
47/63
10K
1SS133
2SC3576-JVC-T
2SC3576-JVC-T
2SC3576-JVC-T
2SC3576-JVC-T
2SC2389S/SE/-T
KTC3199/GL/-T
4.7K
4.7K
4.7K
4.7K
10K
820
820
1k
1k
2SC2235/OY/-T
1K
0.022
1K
1M
KTC3200/GL/-T
1SS133
56K
4.7p
10
MTZJ9.1B
100
3.9K
4.7M
0.082
2SK301/PQ/-T
1SS133
47
220P220P1k
1k
10/35V
10/35V
56K
10P
47K
0.22/50
DZ2.4BSB-T2
10
820
820
56K
10P
10
KTC3199/GL/-T
10k
KTA1267/YG/-T
20K
10
QGA2501C1-02
2.2K
QG
B25
10J1
-10
0.22
0.22
10K
QG
D25
04C
1-03
Z
QN
B01
07-0
01
6.8k
6.8k
QG
D25
04C
1-03
ZQ
GD
2504
C1-
03Z
330
MT
ZJ6
.8C
MT
ZJ9
.1B
22/5
0
47/1
6
0.01
ST
BY
KR
A10
4M-T
1SS
133
KT
A12
68/G
L/-T
10/5
0
DZ
13B
SB
-T2
220
2.2K
1SS
133
10K
KT
A12
68/G
L/-T
220
10/5
0
MT
ZJ5
.6C
-T2
ST
BY
QG
B25
10J1
-12
QG
B25
10K
2-12
10/5
0
MT
ZJ8
.2B
ST
BY
ST
BY
10/5
0
MT
ZJ9
.1B
5.6K
MT
Z10
JC
MT
ZJ1
1C
22/5
0
22/5
0
ST
BY
10/5
0
10/5
0
47K
3300
/25
KT
A12
68/G
L/-T
2A02
M
47K
47/5
0
47/5
0
47/5
0
22/5
00.
082
0.08
2
0.08
2 0.1
0.1
0.1
100/
10
7.5K
22K
100K
1N40
03S
-T5
DZ
9.1B
SB
-T2
MT
ZJ3
3C
10/2
5
47/6
3
820
0.04
70.
047
10
10
10K
5.6K
1K1S
S13
3
KT
A12
68/G
L/-T
0.45
47/5
0
MT
ZJ3
6A-T
2
MT
ZJ3
6A-T
2
10K
10K
KT
A12
68/G
L/-T
10K
100K
100K
47/1
6
1SS
133
82K
100K
MT
ZJ1
5C-T
2M
TZ
J15C
-T2
6.8k
6.8k
47
47
0.1
0.1
56k
33k
56k
470p
470p
2SA
965/
OY
/-T
27K
100K
820
100
47/6
3
0.04
70.
047
10
2.2K
10K
5.6K
1K1S
S13
3
KT
A12
68/G
L/-T
0.45
47/5
0
10
27K
56k
56k
220p
220p
1.2K
47/6
3
10k
0.04
70.
047
15K
10
0.22
1SS
133
10k
0.45
0.1
33k
1.2K
47/6
3
0.04
70.
047
10
0.22
0.45
47/2
5
10k
KR
C10
2M-T
100K
10k
6.8K
KT
C31
99/G
L/-T
KT
C32
03/O
Y/-
T
5.6V
MAINL
MAINL
MAINR
SWL
PRT
9V8V
SWFBSURR.CTRL
PR
T
HA B C D E F G
1
2
3
4
5
2-4
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
Main section
SHEET 3/9
Parts are safety assurance parts.When replacing those parts makesure to use the specified.
SHEET 7/9
SHEET 6/9
SHEET 9/9
SHEET 8/9
SHEET 4/9SHEET 4/9
SHEET 2/9
SHEET 2/9
SHEET 2/9
TUNER signal
MAIN signal
TAPE P.B. signal
CD signal
VIDEO signal
C501C502
C1228
R411
R412
D411
D412
C415
C432
C433
R505
R518
B172
R512
Q402
R403
R404
Q999
R995
CN315
C403
CN870
R523
CN871
C514
R431
R432
R443
C998
C475
R992
R506
C1229
R473
R1209
R475
C531
C503C510
R998
C509
R434
C993
C999
D434
CN661
C534
R1206
CN11
R1205
R513
R530
CN504
R1208
R997
C1202
R996
C528
C1201
R1202
FW714
R531
L546
C419
R1203
C995
Q572
R994
Q571
Q562
R581 R580
C577
C576
Q573
R575
C575
R572
R886
C980
C994
D593
C888
C887
Q586
Q585
C889
R444
R586
C589
C586 C587
R585
JA566
L567
R593
C593
C594
D587
L571
L568
R485
R486
C481
C482
C485
C486
R488
Q483
R491
R492
R494
L572
CN211
R562
J411
C886
C402
C401 R401
R402
R415
R416
Q411
R417
R418
R419
R420
Q413
R421
D413
D414
C416
J426
C426
D426C427
R426
R469
IC43
6
C43
9
C44
1
C44
3
C44
5
C44
6
C44
4
C44
2
C44
0
C44
9
C45
0
C46
0
C45
8
C45
4
C45
6
C45
3
C45
5
C45
7
C45
9
C46
1
C46
2
R43
8
R43
9
R44
0
R44
1
R44
2
C43
6
C43
7
R43
6
R43
7
R41
3R
414
C41
1C
412
C55
6
C43
8
IC46
6
C46
7
C47
3
C47
1
C46
6
C47
2
C47
4
C46
9
C47
0
IC50
1
R50
2
R46
6
R47
2C
468
R50
1
R50
3
R51
9
R51
1 IC52
6
R12
33
R50
4
R53
2
R51
7
R50
8
Q40
1
R40
7C
404
R56
3R52
4
R56
4
R41
0
R49
8
C48
9
B15
0
B15
1
R43
5
D43
1
R50
7C
505
C50
7
C44
7
R53
7
R47
4
R51
0
C47
6
C50
4C
1227
R54
1
C52
7
C50
8
C53
2D50
1
D50
2
C52
6
IC50
2
R52
9
D43
2
C99
6C
997
C53
0
R53
4
R52
8
C57
8
R52
6
R53
6
C59
9
R55
7
R55
8
C98
1
IC57
1
R40
6
R58
3
R58
2
R40
5
R57
9
D57
1D
572
R57
6
R57
7
D59
2
C53
5
R57
1
C57
1
D58
5
C58
5
C58
8
Q48
2
R58
7
Q48
1
R58
8
CN
212
C12
05
C12
06
C12
07
L566
D58
6 C59
6
R49
5C
487
IC48
1
C48
3
C48
4
R48
7
R48
9
R49
0
R49
6
R49
3B24
2
B31
2
C48
8
R56
0
B31
3
B10
8
B15
4 R47
1
C41
3C
414
Q41
2
R46
8
R47
0
R46
7
Q55
7
Q55
6
C44
8
4.7/50 4.7/50
100/10
10k
10k
1SS133-T2
1SS133-T2
0.01
22K
100k
220k
4.7k
4.7k
KRA102M-T
33K
QGF1205C1-10
0.01
QGF1205C1-17
8.2k
QGF1205C1-17
30k
30k
100k
100P
1/50
10K
22K
100/10
15K
1K
100
0.22
4.7/50
10K
QRJ146J-4.7X
1SS133-T2
100P
DZ5.1BSB-T2
QGF1016F3-19
47/16
1k
QGF1205F1-09
1k
220k
5.6k
QGF1016F3-15
1k
10K
0.082
10K
0.1
220/10
1K
QUM156-18DGZ4
15k
QQR0779-001Z
0.0022
1K
100/10
2SC2785/FE/-T
10K
2SC2785/FE/-T
2SC3576-JVC-T
220k
47/16
47/16
2SC2785/FE/-T
47k
100p
47k
33K
0.022
470P
1SS133-T2
KTC3199/GL/-T
KTC3199/GL/-T
100k
2.2M
0.015
0.0018 33P
47K
QNN0017-002
QQR0779-001Z
100K
47P
470/10V
DZ6.8BSC-T2
QQR0779-001Z
QQR0779-001Z
10/35
10/35
KRA102M-T
4.7k
4.7k
10k
QQR0779-001Z
QGB2510K2-09/11
10k
QNN0420-001
220P
220P1K
1K
200
200 2SC3576-JVC-T
2SC3576-JVC-T 2.2k
2.2k
10k
10k
KRA102M-T
22k
1SS133-T2
1SS133-T2
GP1FA550TZ
0.022DZ5.1BSB-T2
10/25
56
5.6k
TD
A74
39
10/2
5
10/3
5
2.2/
50
10/2
5
10/2
5
2.2/
50
10/3
5
10/2
5
2.2/
50
2.2/
50
0.01
8
0.02
2
0.1
0.1
0.1
0.1
0.02
2
0.01
8
0.00
56
0.00
56
2.7k
5.6k
5.6k
2.7k
10k
100/
10
10/2
5
10k
1k
68k
68k
220p
220p
10/2
5
0.01
BA
3837
2.2/
50
10/2
5
10/2
5
4.7/
50
10/2
5
10/2
5
0.06
8
0.27
BA
1521
8
3.3k
200
1k
22/2
5
3.3k
30k
100k
100k B
A15
218
100
100k
22k
56K
270k
2SC
3576
-JV
C-T
2SC
3576
-JV
C-T
2.7k
47/1
6
22k
1.8K
22k
22k
100
100/
10
10k
DZ
3.9B
SB
-T2
30k
0.27
0.01
5
10/1
6
100
51K
0.00
68
0.00
82
100/
10
22k
0.02
7
47/1
6
1SS
133-
T2
100/
10
BA
1521
8
22k
DZ
3.9B
SB
-T2
10P
10P
0.1
1.8K
1/50
100
1000
/6.3
4.7K
12K
1.5
BA
1521
8
100
100
1SS
133-
T2
1SS
133-
T2 10
0k
100k
1SS
133-
T2
100/
10
270
2.2/
50
1SS
133-
T2
1/50 68
0P
2SC
3576
-JV
C-T
100K
2SC
3576
-JV
C-T
22
QG
B25
10K
2-10
R07
79-0
01Z
DZ
6.8B
SC
-T2
0.01
100
100/
10
BA
1521
8
6.8K
6.8K1k
10k
1/50
30K
22k
20k
5.6k
20k
2SC
3576
-JV
C-T
2SC
3576
-JV
C-T
10/1
6
MSI
AUXR
VOLDA
MSI
PBL
PBR
PBMUTE
TX
POUT
RELAY
AUXL
MSI2
AUXMUTE
RECR
RECL
RECR
RECL
SWFB
SWFB
PRT
TUR
TUL
CK
MPX
-30V
SURR.CTRL
RE
CR
AU
XL
CD
L
PB
L
TU
L
TU
R
PB
R
CD
R
AU
XR
PB
MU
TE
VO
LCK
-30V
RE
LAY
KA
RA
OK
E
SM
UT
E
MS
I2
BA
SS
1
MS
TA
T
BA
SS
2
KC
MN
D
MP
X
RE
CL
TU
CE
/CD
MR
ST
MC
S
CK
SP
ISIG
NC
RD
S_C
LK
EC
O
RD
SD
A/K
AR
AO
KE
BA
SS
1
BA
SS
2
SP
ISIG
PO
UT
VO
LDA
VO
LCK
PR
T
R993
QRJ146J-4R7X
A B C D E F G
1
2
3
4
5
2-5
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
FL & System control section
SHEET 4/9
SHEET 3/9
SHEET 3/9
SHEET 1/9
SHEET 5/9
SHEET 5/9
SHEET 5/9
SHEET 7/9Parts are safety assurance parts.When replacing those parts makesure to use the specified.
C889
Q907
Q875
R907
Q908
CN860
R844 C838
R151
X801
R819R820
R801
R902
RA801
C803
D804
L803
R888
FL801
RA802
D805
R838
R839
Q816
R886
R889
R887
Q843
R885
R843
C837
R848
R849
L813
R961
R968
S963
D962
L815
C857
IC951
L812
R970
CN880
L872
CN316
D812
Q879
CN911
Q809 Q810 Q811
C1046
C836
Q812 Q813 Q858Q890
R884
IC830
CN861
IC902 C1039
R1036
Q1022Q1021
C1040
Q860
C1037C1041
C1038
FW915
R1035
R1034R1031
R1033
Q1023
R897
R1032
C1036
R1038
R1039
R1037
C1045
D860
R911
Q877
FW230
C815
R824R823
C874
C875
L801
L805
L806
L802
C817
IC810
Q817
S996
S995
S997
R878
C873
R894
R877
Q905
Q906
R905
R906
R861
C872
R860
R851
R850
R998
R994
S998
S999
R854
R855
R895
R893
C80
5 C80
9
R89
8
C80
8
C84
0
R92
1
D80
7
R82
5
R87
3
C23
3
D90
7
C82
0
C80
4
D80
1
R87
1
D80
3
R81
4
R86
5
R85
8
C82
1
R83
6
R83
7
IC81
1
R83
1
R88
1
R82
7
R81
8
R96
5
R99
3
R84
2 R81
0
R81
1
R81
2
R81
3
R85
7
D96
4
R86
6
R84
5
R86
8
R87
4
R88
0
R84
1
R84
0
Q96
1
R96
2
R81
7
R23
4
C83
5
R87
9
R23
3
R86
9
R86
7
R96
3
R82
6
R85
9
R87
0
R87
2
R89
1
R85
6
R89
0
R96
4
R99
2
R99
1
Q87
8
C82
3
R10
41
C10
43
D10
21
R10
40
R10
44
R86
4
R10
45
R86
2
R10
43
D83
1
C10
34
C10
35
C10
44
C10
42
R10
42
R91
2
R84
6
D83
2
C83
2
C83
1
R84
7
R82
2
C86
2
IC81
2
C80
1
R80
7
R80
8
R82
1
R81
6
R81
5
R99
6R
995
R99
7
C81
6
R87
6
R82
9
R82
8
R88
2
R88
3
R83
2
R83
5
R83
4
R83
3
4.7/50
KRC102M-T
10k
KRA102M-T
QGF1205F1-17
1K
0.001
220
QAX0283-001Z
1K
1K
330
10K
QRB169J-104
470/6.3
1SS133-T2
QLF0081-001
QQL29BJ-100Z
220
QRB169J-104
1SS133-T2
1K
1K
BU2092/F
220
220
220
KRA102M-T
220
220
100/10
330
1K
QQR0779-001Z
100
10K
SLA-362LT-T
QQR0779-001Z
22/50
GPIU271X
QQR0779-001Z
100
QGF1210G1-24
QQR0779-001Z
QGF1210G1-09
1SS133-T2
QGD2503F1-07
1/50
10/25
1K
KIA7042AP-T
BU9253AS
0.01U
0.0
KRA111M-T
0.01
KTC3199/GL
0.013300P
4700P
QUM027-18Z4Z4
33K
10K20K
8.2K
KRA111M-T
18K
20K
100P
4.7K
10K
15K
2.2/50
1SS133-T2
1K
KRA102M-T
22/50
1K1K
0.1MY
BA3835S
0.1MY
QQL29BJ-100Z
QQL29BJ-100Z
QQL29BJ-100Z
QQL231K-220Y
22/50
MN101C35DEA
100K
0.22/50
10K
KRC104M-T
KRC104M-T
100K
100K
10K
0.22/50
680k
1K
1K
1K
1K
1K
1K1K
KR
C10
2M-T
0.00
1 33P
68
33P
100/
10
1N40
03S
-T5
100K
100K
0.1M
Y
1SS
133-
T2
1.5M
Y
470/
6.3
1N40
03S
-T5
100K
1SS
119-
02-T
2
5.6K
100K
100K
2SD
1991
A/R
S/-
T
0.01
100K
100K
100K
10K
10K
10K
10K
1.2K
10K
10K
10K
10K
10K
100K1S
133-
T2
100K
1K
100K
100K
100K
10K
10K
KR
A10
2M-T
10K
10K
1000
p
100K
100K
100K
5.6K
100K
100K
100K
100K
100K
100K
100K
3.9K
2K
2SD
1991
A/R
S/-
T
2SD
1991
A/R
S/-
T
2K
2SD
1991
A/R
S/-
T
2SD
1991
A/R
S/-
T
KR
C10
2M-T
2SD
1991
A/R
S/-
T
2SD
1991
A/R
S/-
T
2SD
1991
A/R
S/-
T
2SD
1991
A/R
S/-
T
QG
F12
05F
1-17
KR
A11
1M-T
0.33
MY
20K
0.47
MY
MT
Z5.
1B-T
2
2.7K 5.
6K
10K
1K
22
20K
MT
ZJ5
.1B
-T2
0.1M
Y
100/
10
0.01
u
22/2
5
220
10K
QU
M15
3-11
DG
Z4
1K
DZ
5.1B
SB
-T2
0.01
0.01
1K
10K
22/5
0
0.01
MY
10K
10K
2SD
1991
A/R
S/-
T
10K
56K
56K
2.7K
2.2K
1.5K
47/1
6
10K
10K
10K
10K
10K
100K
100K
100K
100K
VSS
PHOTOB
SURROUND
SPIDTI
POUT1
CD3LED
VC3RESET
HP
VOL-DATA
VOLDTA
MSI
MPX
INH
INH
SMUTE
TUCE
CD2LED
CD1LED
HP
TULED
BASSLED
CDLED
MSI
SMLEDAUXLED
BASSVOL-
TUCE
BASSVOL+
PHOTOB
SMODE-
SMODE+
EXTCE
SMUTE
PHOTOA
TAPELED
MPX
SEARCH-LED
VOL+
VOL-
POUT1
ECON
RDS_CLKCD1LED
CD2LED
14G
PBMUTE
PHOTOA
VOL-
VOLCKSURROUND
RESET
AUXLED
REMIN
RELAY
VDD
BASSVOL+
SMLED
CD3LED
BASSVOL-
RELAY
SOUNDMODE-
TAPELED
CDLED
SOUNMODE+
SPI_BSPI_A
BASSLEDTULED
AUXMUTE
INH
VOL+
ECHO1
15G
16G
DATACK
SPI-IN
R_SEARCH
RDS-DATA/KARAUKE
RDS-CLK
SLLCE
ECHO2
ECON
RELAY
17G
PRT
F_SEARCH
VOL-CK
INH
AUXMUTE
KCMND
MSTAT
KCLK
MRDY
PRT
VC3RESET
BASS2
RST
BASS2
BASS1
RDS_DATA
PBMUTE
BASS1
SPI_IN
REMIN
SPI_A
SPI_B
EXTCE
VOLCKFVOLDA
DA
TA
G13
1G
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
SLC
KE
Y1
P12
P13
P14
P15
P16
SLC
CE
P17
P18
3G
SLC
KE
Y2
P19
DA
TA
P20
CK
P21
P22
P1
SLC
KE
Y2
4G 5G
KC
MN
D
6G 7G 8G 9G 10G
MS
TA
T
G1
11G
12G
SLC
KE
Y1
P10 P8 17
G
16G
G1
G2
P2
1G
KE
Y4
G3
4G 5G 6G 7G 8G 9G 10G
11G
12G
G13
G14
P3
P4
P5
P6
P7
8P P9
10P
P11
P12
P13
P14
P15
P16
G17
15G
14G
13G
G153G 2G
SLC
KE
Y2
SLC
KE
Y1
13G
G2
KE
Y3
KE
Y4
KE
Y3
KE
Y2
KE
Y1
2G
CK
KE
Y2
G3
KC
LK
KE
Y1
1G2G3G13G
14G
15G
16G
17G
P8
P10 G
2
G1
G4
SP
IDT
I
MR
DY
G5
EC
HO
1
EC
HO
2
G14
G15
G16
G17
G6
G7
G8
G9
G10
G11
G12
P17
P18
P19
P21
P22
G16
HA B C D E F G
1
2
3
4
5
2-6
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
Front key section
SHEET 5/9
SHEET 4/9
SHEET 4/9
SHEET 4/9
SHEET 2/9
TW800
FW915
CN870
C901
Q956Q960
Q953
Q918
Q954Q941Q940
C1070
C935
FW901
C1021
C902
Q919
JS901
D1003
S901
S902
Q920
D1062
S931
S932
S933
S951
R930
S935
C962 C963
JS962
S936
S937
S939
J1001
TW801
S938
L1002
FW713
S952
JS956
C960
JS960
C961
S950
S942
S944
S943
S945
S949
S948
S947
S946
S915
S917
S916
R1068
R1021
R1022
J1022
J1021
Q1061
IC901
C1068
R1069
C1066
D1061
R1062
R1063
D94
5
D94
2
D94
4
D94
3
R95
5
R90
8
L100
3
D90
4
R90
4
D90
5
Q90
1
R92
9
R95
4
R95
1
D95
4
R93
8
R94
1
R93
2R
933
R93
5
R94
0
R93
9
D94
0
R93
1
D94
1
R93
7
R95
3
R95
2
R93
6
L100
1
C10
02
C10
01
C10
04
C10
06
C10
05
R91
6
D95
3
D95
7D
956
C95
6
C95
7
R95
6
D96
1D
960
R96
0
R94
2
R94
4R
943
R94
6R
947
R94
8R
949
R94
5R
950
D91
9
R91
7
D91
8
D92
0
R91
9
R92
0
C10
22C
1023
VR
901
R10
71
R10
70
C10
65
C10
67
R10
67
R10
66
C10
63
R10
61
C10
62
C10
61
R10
65
R10
64
C10
64
R91
8
QUB220-15DMHP
QUM027-18Z4Z4
0.01
2200p 0.01
QUM027-13DGZ4
1000p
0.01
QSW0911-001
MTZJ2.4B-T2
MTZJ2.4B-T2
10K
0.01 0.01
QSW0862-001
QNS0183-001
QUB220-15DMHP
QQL231K-470Y
QUM153-33DGZ4
QSW0912-001
0.01
QSW0911-001
0.01
20K
4.7k
4.7k
QNS0184-001
QNS0184-001
2SD2144S/VW/-T
NJM4580L
0.22/50
1K
330P
1SS133-T2
12K
390
KT
A12
67/Y
G/-
T
KT
A12
67/Y
G/-
T
KT
A12
67/Y
G/-
T
KR
C10
2M-T
KT
A12
67/Y
G/-
T
KT
A12
67/Y
G/-
T
KT
A12
67/Y
G/-
T
1.5K
KR
C10
2M-T
5.6K
R07
79-0
01Z
68L-
115X
SR
D-D
-T
KR
C10
2M-T
2
KR
C10
2M-T
2K
68
2K
L-91
4SR
D-T
2.2K
68
2.7K
3.9K
5.6K
68
2.7K
L-91
4SR
D-T
2.2K
L-91
4SR
D-T
1.5K
68
1.2K
1.2K
L231
K-4
70Y
3900
p
3900
p
1000
p
1000
p
1000
p
1K
L-91
4SR
D-T
SLA
-362
LT-T
0.01
0.01
68
SLA
-362
LT-T
68
3.9K
3.9k
10K
2.7K
1.5k
1.2k
2.2k
5.6K
1k
SLA
-362
LT-T
1K
SLA
-362
LT-T
SLA
-362
LT-T
200
200
1000
p10
00pQ
VQ
0299
-B54
4.7K
560
150P
2.2/
50
56
4.7M
4.7/
50
10K
100/
10
220/
10100
1.5k
150P
200
A B C D E F G
1
2
3
4
5
2-7
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
CD servo control section
SHEET 6/9
CD signal
SHEET 3/9
SHEET 9/9
VIDEO signal
R852
R802
R809
R808
C821 C822
R806
R805
R804
R803
C617
R851
C611
C619
C624
IC251
R631
C631
Q631
R666
R632
R635
R634
C632
R853
CN601
C633
R807
C606
C603
C604
IC852IC851
R602
R601
C602C601
R636
R854
W601
CN801
R262
R831
R832
R251
IC651
R661
R667
R263
C661
C651
X651
C652
R609
CN151
C653
C676
R682
R691
R692
C693
C694
Q632
C618
CN651
R615
R261
R252
C622
R293
R641
Q291
R292
R291
C291
R642
R253
R257
R255
R873
C641C642
R254
C859
C860
C253
R670R813
R812
R876
R875
R874
R872
R871
C816
R617
C815
R606
R677
R679
X251
C252
R888
R294
C251
R678
R614
C608
R889
R890
R891
R256
R892
R856
R893
L851
R607
R855
R894
R895
C852
TP2
Q842
R842
C855
TP1
C659
R660
C254
CN855
R887
R886
R885
R884
R883
R882
R881
R880
R610
R608
C620
M851
L853
M852
L854
CN854
R861
R862
R863
R866
R865
R864
CN851
P001
VR001
C001
P011
SW1
SW2
SW3
SW6
SW5
SW4
CN804
CN805
C658
IC80
1
C81
2
C81
4
R80
1C
801
C81
1
C81
3
C80
2
R62
4
C62
1
C67
7
C85
3
C61
4
C61
5
C61
2
C62
3
R68
7
R68
8
C61
0
R62
1
R60
4
R68
6
C85
4
C60
5
R60
3
D85
1
R61
6
R65
1
C65
7
C65
5
R65
2
R65
3
R65
4
R66
5
C65
6
R66
2
R66
3
R66
4
C66
3
C66
4
C66
5
C68
0
C67
9
R62
0
R61
9
R61
8
C67
3
R68
3
C66
9
R65
6
R65
7
R65
8
R25
8
R68
5
R65
9
R25
9
R81
1
C66
8
IC60
1
R66
9
R62
5
R62
3
C60
7
C66
7
C61
3
R61
3
R61
1
R62
2
R63
3
R64
7
R26
4
R68
4
R64
8
R64
9
R65
0
R66
8
C66
6
C67
2
R67
2
C67
1
R64
6
C61
6
1K
3.9K
1.2K
27K
1 220/10
24K
13K
220K
2.2K
330P
1K
NI
NI
100/6.3
MN101C30AEE
2.2
10/16
2SA1037AK/RS/-X
220
10
120
12
1
1K
QGF1016F3-15
0.022
1.2K
39p
0.022
0.022
LB1641LB1641
270K
220K
0.0010.001
10
1K
QGA2001C1-06
100
150
10K
NI
MN662748RPMFA
39k
4.7
100
470P
12P
QAX0413-001Z
12P
3.3k
QGF1016F3-15
0.1/25
0.1/25
1K
NI
NI
NI
NI
NI
NI
QGF1016F3-19
NI
100
1K
0.047
1K
150k
2SB1357/EF/-T
10K
1.2K
47/10
390k
1K
1K
100
22K
0.022
2200p
100
1
1
0.1/25
100NI
1.5K
22K
22K
22K
22K
22K
NI
NI
2.2/50
62k
100
100
QAX0283-001Z33P
22K
1K
33P
100
22k
820p
22K
22K
22K
100
22K
0
22K
10
0
NI
22K
22K
10/16
NI
4.7K
0.1/25
1000P
10K
47/10
QGB2012K2-10
1K
1K
1K
1K
1K
1K
1K
1K
NI
0
47p
MSN-5D257A
10
MSN-5D257A
10
QGB2016K1-07
1K
1K
1K
1K
1K
1K
NI
HQMV7102-015
2KB
1
QGA2001F1-06
E406783-001
E406784+001
ESB110-005
0.1/25LA
6541
-X
390P
390P
2.7K
0.00
68
390P
390P
0.01
2
0
1
0.1/
25
0.01
0.02
7
0.00
471/50
1
NI
NI
0.02
7
560K
390k
NI
0.01
150P
120k
DZ
5.6B
SB
-T2
NI
1K
220/
10
0.1/
25
1K 1K 100
270
0.1/
25
68K
120K
330
0.02
2
0.02
2
0.15
0.1/
25
100/
6.3
560K15k15k
220/
10
1M
220/
10
1K 1K 1K
1K
68k
1K
1K
22K
0.04
7
AN
2200
0A-W
5.6K
0
8.2k
HD
U-1
00
NI
1
0.1
2.2K
22K
8.2k
NI
1K
NI
560k
1K 1K 1K
1.5M
NI
0.33
U2.
7K
NI
0
0.01
SQCK
SUBQ
/RFDET
OFT
RFENV
BDO
TRD
LDON
B+D
FE
GCTRL
FBAL
TBAL
A+C
B+D
F
E
F+
T+
T-
F-
FM-
SM+
SM-
FM+
/P.ON
KICK
TVD
TRV
P.ON
ECM
ECS
FOD
P.ON
TE
TRV
TVD
ECM
ECS
KICK
TRD
FOD
RFENV
FE
TBAL
FBAL
OFT
/RFDET
BDO
LDON
ARF
DABCK
/P.ON
TE
ARF
WVEL
VDET
A+C
F
E
VDET
WVEL
DALRCK
DADAT
CAM0
CAM1
CAM2
CAM3
CAM4
CAM5
CAM6
CAM7
LM-
LM+
RM-
RM+
1SSW
2SSW
3SSW
3MSW
2MSW
1MSW
T+
SM
-T
-
SM
+
FM
+
FM
-
F+
F-
MLD
MD
AT
A
1SS
W
2SS
W
3SS
W
3MS
W
2MS
W
1MS
W
MC
LK
SQ
CK
BLK
CK
/TLO
CK
/FLO
CK
SE
NS
E
LMU
P
XC
LK
/LS
IRS
T
CD
BC
K
CD
LRC
K
CD
DA
TA
RM
UP
LMD
OW
N
RM
DO
WN
LM-
LM+
RM
-
RM
+
ST
AT
SU
BQ
HA B C D E F G
1
2
3
4
5
2-8
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
Head amplifer section
SHEET 7/9
Parts are safety assurance parts.When replacing those parts makesure to use the specified.
TAPE P.B. signalSHEET 3/9 SHEET 4/9
IC302
Q3312
R3376
Q3323
FW301
C3103
Q3314
Q3316
IC301
R3368R3359
C3346
Q3302
D3307
C3101
R3105
D3308
L3202
CN306CN305
Q3317
R3362
C3327
Q3313
Q3315
R3319
R3370
C3335C3336
R3351R3354
R3350R3353
CN301
CN302
VR301
R3220
R3378
R3327
R3344
C3203
R3309
C3201
R3379
R3345
CN333
CN303
Q3324
R3367
R3383
D3309
R3330
R3331
C3501 C3601
C3502
C3602
L3301
C3102
C3202
Q3305
IC303
C3308
C3314 C3315C3313
R3314
L3303
TP3301
VR101
VR201
R3335
R3203
R3103
C3316
R3355
C3301
C3220
C3120
Q3205R3205 R3208
R3220
R3219
C3219
C3205
C3206
C3303
C3302
R3302
R3206
R3207
C3106
R3106
R3107R3119R3111
R3120
Q3105
R3117
C3306
C3119C3113
R3108
C3341
R3315
R3301
R3336
C3345
R3348
R3347
C3204
C3339
R3121
R3221
C3340
D302
IC332
D311
IC331
R33
66
R33
61
C35
55
R33
11
R32
14C
3216
C32
15
R32
18
R32
17
R32
12
R32
13
C32
13
C32
07
C32
11
C32
12
C32
14
R33
74
R32
11
C33
05
C31
14
C31
12
C31
11
C31
07
R31
18
R33
04
C31
16
C31
15
C31
05R
3105
R31
13
R31
12
C33
44
R31
14
C33
04
C33
42
C31
04
SW
316
SW
305
SW
304
SW
303
SW
306
R33
69
SW
302
AN7345K
2SB562( C)
10
KRC104M-T
QUM154-10Z4Z4
820P
2SB562( C)
KTA1267/YG/-T
BA3126N
22K10K
560P
2SC2001( K)
MTZJ5.1B-T2
10P
47
MTZJ5.1B-T2
QQR0621-001Z
QGF1205F1-09QGF1205F1-10
KRC107M-T
24K
47/16
KTC3199/GL/-T
KTC3199/GL/-T
47
10K
0.010.01
150150
4.7K4.7K
QGF1205F1-06
QGF1205F1-06
QVP0008-103Z
47
47
470K
220K
820P
1.5K
10P
20K
47K
QGB2011L1-10
QGB2011M1-10
KRA102M-T
10K
470
MTZJ5.1B-T2
10K
10K
820p 820p
270p
270p
MSI-5U2LWA
QQR1118-001
330P
330P
2SC2001( K)
BU4094BCF
0.0015
VGH0424-037
1.5 0.022100/10
100
VGH0425-544
VQP0033-100Z
QVPA603-503AZ
QVPA603-503AZ
2.2K
18K
18K
0.01
3.3K
100/10
33P
33P
2SC3576-JVC-T
22 240
1K
20K
0.056
100/10
0.033
22/16
100/10
100
3.9K
2.2K
0.033
3.9K
2.2K 20K5.6K
1K
2SC3576-JVC-T
3.3K
220/6.3
0.0560.0033
240
100/10
15K
220
3.9K
330P
2.2k
3.9K
220P
100/10
1.2K
1.2K
0.01
1SR139-400-T2
SG-105F3-BB,C
1SR139-400-T2
SG-105F3-BB,C
27K
39K
1000
p
4.7
390
0.00
82
0.01
5
1.5K
3.3K
1.2K
270
0.00
33
4.7/
25
0.1/
50
10/1
6
4.7/
25
2.2
5.6K
0.03
9
4.7/
25
10/1
6
0.1/
50
4.7/
25
1.5K
39K
0.00
82
0.01
5
100/
10
22 270
1.2K
4700
P
390
4.7/
25
4.7/
25
220P
QS
W08
59-0
01
VG
P24
01-0
0A
QS
W08
59-0
01
VG
P24
01-0
0A
100
QS
W08
32-0
01
A/B
RECH
TK
EY
1
TK
EY
2T
KE
Y2
PH
A
RE
CB
RE
CB
TK
EY
1
TK
EY
2
PH
B
PH
A
RM
UT
E
PH
B
A/B
A B C D E F G
1
2
3
4
5
2-9
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
Tuner section
SHEET 8/9
Parts are safety assurance parts.When replacing those parts makesure to use the specified.
TUNER signalSHEET 3/9
TU1
C25
C52
CF3
*R5
CF1
C49
C6
C51
C7
C26
C12
C11
R15
R17C14
C15
C13
L1
R16
C27
C58
C16
R29
R41
R21
R28
C54
C22
R27
CF2
C45 R38
C44
C50
*C42
R39
*C43
R37
C21
C36
R31
C30
R32
C23
C24
CN1
C18
D1
R30
T1
R8( D2)
D3
D4
C53
C57
C20
Q5
Q1
C48
J1
C17
R33
R3
*R4
R2
C2
R23
R25
IC2
R14
X1
R24
R26
D11
IC1
R10
C46 C47
R34
C34
C32
C31
C40
C35
R36
C39
C38
R35
C37
R18
C41
C33
R19
R20
R22
C19
C4C
1
R13
R40
C3
*R6
R60
C60
*R1
100/10
0.27
QAX0610-001Z
VCF2L3B-105Z
470P
0.001
1/50
0.001
0.001
LC72136N
0.047
0.1
3.3k
68( 1/4W) FR100/10
12P
12P
4.7K
0.001
0.047
12P
10K
3.3K
5.6K
10K
0.047
150P
10K
LA1838
VCF2L3B-105Z
10/16 56K
10/16
22/16
56K
10K
0.022
1/50
1K
100/10
1K
150P
150P
QGF1205F1-09
0.47/50
1.2K
QQR0793-001
1SS133-T2
1SS133-T2
22/16
0.001
1000P
QQR0796-002
DTA114YKA-X
0.0022
QNB0014-001
0.0039
330
220K
330
0.01
1.8k
330
100K
QA
X04
02-0
01
10K
2.2K
1SS
133-
T2
2.2K
0.02
7
1/50
47
0.02
2
0.04
7
22/1
6
10/1
6
0.04
7
3.3K
1/50
0.22
/50
5.6k
1/50
1K
10/1
6
0.04
7
1K 1K4.
7k
0.04
7
1SS
133-
T2
1SS
133-
T2
0.010.02
2
10K
2SC
2814
/4-5
/-X
24K
10/1
6
0
5.6V
LOU
T
RO
UT
ST
ER
EO
CE
9VCK
DA
TA
GN
D
HA B C D E F G
1
2
3
4
5
2-10
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
VCD section
SHEET 9/9
SHEET 3/9
SHEET 6/9
VIDEO signal
IC104
IC103
CN101
IC101
R145
R146R147
C135
R141
IC105
IC102
C136
D103
CN102
R102
C106
C105
C101C102
C104
C103
C128C127
C126
C129
X101
C113
C115
R121C114 L102
C120
C124C125 C133C123 C132
K103
K104
R138
C131 C130
K101
K102
C121
C122
C112C111
L101R119
R118
R120
C109
Q101
R148
R128
C110
D101
D102
R130
R135R136
C134
C138
C137
R10
1
R10
7R
108
R10
6
R10
9
R10
5R
104
R10
3
C11
7
C11
8
R13
7
R14
0
R13
9
C11
6
R13
2
R11
2R
113
R11
1
C10
7
R13
4
R13
3
ES3883F
GLT44016-35J
QGF1016F3-15
ES3880F
220
DGND
220220
VCCVCC
VCC
DGND
VCC
VCC
VCC
DGND
47
DGND
DGND
DGND
DGND
DGND
DGND
DGND
10k
RT9161/A-36CG-X
AT27C020-70JC3
0.1
NI
QGF1016F3-15
VCC
VDD3
DGND
DGND
4.7k
10u
0.1
0.10.1
10
0.1
VDD3
0.10.1
0.1
0.1
QAX0700-001Z
27p
27p
100k1000p
3.3u
0.1
0.1 0.1 0.1
47
100
NRSA02J-180X
NRSA02J-102X
470.1
4.7k
33
0.1 100
NQR0398-006X
NQR0398-006X0.1
100
470p470p
3.3U0
NI
75
0.1
NI
1K
33
0.1
NI
NI
33
1010
10
100
0.01U
4.7k
4.7k
4.7k
4.7k1k
4.7k
4.7k
4.7k
4.7k
4.7k
0.1
270
4.7k
4.7k
4.7k
0.1
75 75
DBUS8
DBUS0DBUS1DBUS2DBUS3
DBUS4DBUS5DBUS6DBUS7
/DCAS0
DBUS9DBUS10DBUS11
DBUS12DBUS13DBUS14DBUS15
DA0DA1DA2DA3 DA4
DA5DA6DA7
/DOEDA8
/DWE/DRAS
/RAS/DWE
DATA
YUV7YUV6YUV5YUV4YUV3YUV2YUV1YUV0
YUV7YUV6YUV5YUV4
YUV3
YUV2
YUV1
YUV0
LD7
LD6
LD5
LD4
LD3
LD2
LD1
LD0
AUDIOCLKAUDATABCLKLR
AINARCLKARFS
SCLKDATAWCLK AIN
ARCLK
VSYNCHSYNCMPUCLKPCKCSCN
135M10
AUX3
AUX1
AUX0
MIC1AOL+
AOL-AOR-AOR+
AUX2
WCLKSCLK
LA12LA13LA14LA15LA16LA17
AUX0
AUX1AUX3
AUX7AUX2AUX6
LD6
LD5
LD4
VGND
LD3
LD2
LD1
LA17
LA16
LA15
LA12
DB
US
0
DA
0D
A1
DA
2D
A3
DA
4D
A5
DA
6D
A7
DA
8
DB
US
1D
BU
S2
DB
US
3D
BU
S4
DB
US
5D
BU
S6
DB
US
7D
BU
S8
DB
US
9D
BU
S10
DB
US
11D
BU
S12
DB
US
13D
BU
S14
DB
US
15
/DC
AS
0/D
OE
/LC
S1
LD0
LD1
LD2
LD3
LD4
LD5
LD6
LD7
LA0
LA1
LA2
LA3
LA4
LA5
LA6
LA7
LA8
LA9
LA10
LA11
/LO
E/L
RO
MC
E
/RS
TO
UT
AU
DIO
CLK
LR AU
DA
TA
BC
LK
AR
FS
PC
KC
SC
N13
5M10
HS
YN
C
VS
YN
C
MP
UC
LK
VD
AC
/LC
S1
LD7
AU
X6
AU
X7
AU
X5
AU
X5
LD0
LA10
LA11
LA9
LA8
LA13
LA14
LA0
LA1
LA2
LA3
LA4
LA5
LA6
LA7
/LO
E
/LR
OM
CE
A B C D E F G
1
2
3
4
5
2-11
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
T003A
T003A
C401
C402
C403
C404
C411
C412
C413
C414
C415
C416
C426
C427
C432
C433
C436
C437C438C439
C440
C441
C442
C443
C444C445
C446
C447
C448
C449
C450
C453
C454
C455
C456
C457
C458
C459
C460
C461
C462
C466
C467
C468
C469
C470
C471
C472
C473
C474
C475
C476
C481
C482
C483
C484
C485
C486
C48
7
C489
C50
1
C502
C503
C504
C505
C507
C508
C509
C510
C514
C526
C527
C528C530
C531
C532
C534
C535
C556
C571
C575
C576
C577
C578
C585
C586
C587 C588
C589
C593
C59
4
C596
C597
C598
C1201
C1202
C1203
C1204
C1205
C1206
C1207
CN211 CN212
FW714
D411
D412
D413
D414
D426
D431
D432
D434
D501
D502
D571
D572
D585
D586
D587
IC436
IC466
IC481
IC501
IC502
IC526
IC571
J426
JA566
L401
L566
L567
L568
L571
L572
L573
L546
Q401
Q402Q411
Q412
Q413
Q481
Q482
Q483Q556
Q557
Q562
Q571
Q572
Q573
Q585
Q586
Q589
Q590
R433
R401
R402
R403
R404
R40
5
R406
R40
7
R411
R412
R413
R414
R415
R416
R41
7
R418
R419
R42
0
R421
R426
R431
R432
R994
R435
R43
6
R437
R438
R439
R440
R441
R442
R443
R444
R466
R467
R468
R469
R470
R471
R472
R473
R474
R475
R485
R486
R487R488
R489
R490
R491
R492R493
R494
R495
R496
R498
R501
R502
R503R504
R505
R506
R507
R508
R998
R510
R511
R512
R513
R517
R518
R519
R523
R524
R526
R528
R529
R530
R532
R534
R536
R537
R541
R531R557
R558
R560
R562
R563
R564
R571
R572
R575
R576
R577
R579
R580
R581
R582
R583
R585
R586
R587
R588
R593 R595
R596
R597
R598
R599
R1201
R1202
R1203
R1204
R1205
R1206
R1207
R1208
R1209
CN661
R410
CN
315
TW6
B132
TW8
R997
TW7
R996
TW9
TW10
C888
C889
C887
C886
J411
TW11
TW12
R993
Q999
D593
R886
C994
C1228
C1227
C1229
CN11
FW401
FW401
CN
870C
N871
CN504
R995
C999
C998
C997
C996
TW4
TW3
R888
R887
R777
R776 C995
1
1
B E
B E
B
E
B
E
E B
B
B
E
E
B
EB
B
EBEB
E B
BE
B
1
55
17
1
17
1
19
1011
113
CN870
MSI2MPX
SMUTETUCE
KCMNDMSTAT
SDATACK
RDSDATAD.GND
RDSCLK
1
10
CN871
FLBIAS-32V
A.GND
5.6V[SUBTR.]5.6V
SURR.PBMUTE
BASS1BASS2
AUXMUTERELAY
POUTVOLDATA
VOLCKPRT
VGN
DVD
GN
DR
ELAY
FLBIAS-30VC
D.G
ND
A.GN
DD
.GN
D
M.G
ND
POU
T
CN
212
1
10
CN
211
-9V 9V 8V 5.6VPR
TSW
FBSU
RR
ECO
5.6V[SUB.T]
11
111
MGND
M+BMSI
PBRAGND
PBL
SW8V
RECRNCRECL
CN315
6
1
17
17
1
9VMIC
CN
504
9
BE
B E
1
E
6
1
MAINR
A.GNDMAINLSW.GNDSWSMUTE
FW714E
E B
EB
1
191
CN
661
BU+5
BU+5
DG
ND
DG
ND
CD
LAG
ND
AGN
DC
DR
MG
ND
MG
ND
CD
+8VC
D+8V
MSTAT
KCM
ND
13 1
CN
11
SDATA
TUC
EC
KMPX
TUN
ER+B
TUL
AGN
DTU
R
RD
SCLK
RD
SDA
9V DG
ND
DG
ND
15
15N
CNCNC
NC
NC NC
VGN
DVG
ND
CVO
UT
VDG
ND
VDG
ND
VSW5V
VSW5V
1
RIGHT
LEFT
TP1
GND
/CD
MR
STM
CS
PON
NC
TX
5V[VCD
]
NC
E
KCMND
MCS
NC
MSTAT
/CDMRST
NC
/CDMRST
MCS
NCSPISIG
ECO
1
10
[C40
5]
[C406]
MIC
MIC
A.GN
D
TW14
TW15
TW17
TW18
TW16 TW19
FT51
2
FT52
2FT
521
FT51
1
CN
208
CN
209
CN220
CN214
S1 S2 CT
S2 S1 S4 S4
1 713
FL1
FL2NC
13
12
4
S500
FT132 FT131
FT112 FT111
RY3
CN
219
CN251
C252
D252
R254
R250
Q250
D253
C251
C250
L250
CN
250
R253
D256
T003A
Transformer board
Eco board
Main boardPrinted circuit boards
HA B C D E F G
1
2
3
4
5
2-12
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
T001C
T001
C
T001
C
C601
C602
C603
C604
C605
C606
C607
C608
C609
C610
C612
C613
C614
C61
5
C616
C618
C621
C622
C623
C639
C683
C703
C704
C705C706
C707
C708
C709C710
C711
C712
C713
C714
C715
C716C
721C
722
C72
3
C726
C729
C730
C731
C739
C790
CN705
D619
D620
D622
D703D704
D719
D723
D724
D726
D728
D790
D791
IC602
L601L602
L701
L702
Q60
1
Q602
Q612
Q613
Q680
Q701
Q702
Q710
Q711
Q712
Q713
Q726
Q727
Q728
Q733Q
734
Q735
Q736
Q737
Q790
Q791
Q792
R601
R602
R603
R604
R605
R606
R607
R608
R613
R614
R615
R616
R617
R618 R
619
R620
R621
R623
R640
R652
R653R
654
R655
R667
R66
8
R674
R675
R676
R680
R681
R682
R701R702
R703
R704
R705
R707R708
R714
R716
R717R718
R71
9
R72
0
R721
R722
R723
R724
R725
R726
R727
R728
R729
R730
R733
R734R735
R736
R740
R761
R762
R766
R768
R769
R77
4
R775
R776
R777
R778
R786
R787
R790
R791
R792
R793
R794
R795
R796 R
797
R798
R754
R753
CN
215
R659C625
R658
Q604
Q603
R657
BE
MAINR
A.GND
MAINL
A.GND
S/WIN
SMUTE
EB
BE
B
E
E
B
BE
E
B E
B E
B
EB
EB
E B
1
1
B
B E
B
E
B
B E
HPL
A.GN
D
HPR
E
E
BE
BE
1
LR
L
EB
R
FAN[-]
FAN[+]
EB
14
MAINRMAINLSWRSWLPOUTSURRPRTM.GND12V-VLA.GNDVLVH-VH
C901
C902
D904
D905
JS901
Q901
R901
R908
R904
S901
S902
FW901 EB
1 7
7
1 FW901
DG
ND
NC
SEARC
HLED
F.SEARC
H
R.SEAR
CH
5V KEY21
C201
C202
C203
C20
4C
205
C211C212
C213
C21
4C
215
C216
C21
7
C21
8
C219
C22
0
C22
1
C22
2
C223
C25
3
C28
0
C28
1
CN201CN202
CN203
CN205
CN207
D201
D202
D204
D203
D211
D212
D213
D214
D21
7
D218
D21
9
D22
0
D221
D223
D22
7
D233
D234
D28
0
Q201
Q204
Q240
R20
2
R203
R20
4
R20
5
R207
R20
9
R21
5
R21
6
R21
7
R21
8
R242
R246
R247
R28
1
R28
3
R284
CN
204
EP201
R210
R248R249
R38
3
R384
R385
C372
Q37
2
D369
D37
0
C37
3
C37
4
Q37
1
Q37
4
Q373R38
9
CN
206
CN
206
5.6V EC
O
SUR
RC
TRL
SWFB
PRT
5.6V
8V 9V -9V
3.3V
10V
FL1
FL2
REL
AY
INH
-30V
CD
D.G
ND
A.G
ND
D.G
ND
M.G
ND
POU
T
REL
AYB2 SW
LGN
DM
AIN
RM
RG
ND
MAI
NL
SWR
GN
DSW
RM
LGN
DSW
L
CN
207
114
110
11110 1
10
1
1
9V8V
5.6V
POU
T
A.G
ND
M.G
ND
D.G
NDS4
3.3V 10
V
1
10
8 101
EB
CN
205
-VH
VHVLP.G
ND
-VL
8VM.G
ND
PRT
SUR
RPO
UT
SWL
SWR
MAI
NL
MAI
NR
1
14
NC
GN
D
ECO
5.6V
4 1
B E
B B
E E
8
7
Regulation board
Preset/ tuning switch board
Amplifer board
Regulation & amplifer board
A B C D E F G
1
2
3
4
5
2-13
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
T001B
T001B
T001B
T001B
C80
3
C80
4
C80
5
C806
C80
7
C80
8
C80
9C810
C81
2
C81
3
C81
5
C81
6
C81
7
C82
1
C82
2
C82
3
C83
1
C83
2
C83
7
C835
C836
C85
7
C86
2
C87
2
C87
3
C87
4
C87
5
C88
9
FW915
D80
1
D80
2
D80
3
D80
5
D80
6
D80
7
D83
1
D83
2
D860
D873
RA801
L813
IC902
IC810
IC812
IC951
L801
L802
L803
L805
L806
L807
Q80
1
Q802
Q80
9
Q81
0
Q81
1
Q812
Q813Q816
Q817
Q860
Q87
5
Q878
Q90
5
Q90
6
Q961
R80
1
R80
2
R80
3
R80
4
R80
6
R80
7
R80
8
R81
0
R81
1
R81
2
R81
3
R81
4
R81
5
R81
6
R81
7
R81
8
R81
9
R82
0
R822
R82
3
R82
4
R82
7
R82
8
R83
1
R83
2
R83
3
R83
4
R83
5
R83
6
R837
R83
8
R83
9
R84
0
R84
1
R84
3
R845
R846
R847
R84
8
R84
9
R85
0
R85
1
R853
R85
4
R85
5
R86
0
R86
1
R86
2
R86
4
R87
6
R87
7
R87
8
R88
1R
882
R88
3
R88
5
R886
R887
R888
R88
9
R89
3
R89
4
R89
5
R89
9
R90
5
R90
6
R921
R96
1
R962
R963
R964
R99
4
R995R996R997
R998
S963
S964
S995
S996
S997
S998
S999
X801
X802
R87
2
R87
1
R87
0
R87
4
R87
3
R86
6
R82
6
R865
R86
9
Q85
8R
868
R86
7
R89
1
R89
0
R82
5
R85
6
R85
7
R85
9
R85
8
Q879
D10
21
Q890
FW230
R87
9
R88
0
L872
L815
D81
2
R902
L812
IC811
Q10
21
Q1022
CN911
Q10
23
R965
R1044
R10
31
R10
35
R10
38
R10
36
R970
R10
32
R10
42
R10
39
R88
4
IC83
0
C82
5
CN
860
C838
R991
FL801
R10
43
R992
R968
CN
861
D81
5
CN880
R993
R1045
R10
37
R10
33
R10
34
R10
40
R1041
C10
44
C1034
C1043
C10
36
C10
40
C1037
C10
39
C10
38
C10
35
C10
45
D816
CN316
RA802
D22
0
R234
R233
C22
1 C22
2
R20
5
C23
3
C84
0
D804
D962
R896R844
R84
2
R969
R897
R911
R912
Q877
Q907
Q908
,
1
EB
C
1
VOL-
VOL+
TAPELED
SMO
DE+
SMO
DE-
BASSVOL-
BASSVOL+
KEY4
KEY41
KEY3KEY2
KEY21KEY32
AUXLED
SMLED
,CD
LED
BASSLED
TULED
DG
ND
5V HP
ECH
O1
ECH
O2
AGN
D24
18
1
10
9
17
1
71
17
68 1
1
100
7675
51
50
26 25
5VKEY1
KEY11
DG
ND
CD
1LEDC
D2LED
CD
3LED
MSI
MPX
INHSMUTE
TUCE
KCMND
MSTAT
KCLKSDATACK
SPI_INMRDY
DGNDRDSDT
C3RST
RDSCLKECON
1
17
PRTVOL-CLK
VOL-DATA
POUTRELAY
AUXMT
BASS2BASS1PBMUTE
SURR
5V5V[ST]
9VMIC
AGND-32VFLBIAS
CN
880
B E
B
B
E
18
1 9
10
1018
9
1
1
24
B E
B E BE
EB
E BBE
EB
EB
B E
EBB
E
5VSLCC
ED
ATAC
KSLC
KEY1D
GN
DSLC
KEY2PH
OTO
BPH
OTO
A
19
BBB
EEE
BE
EB
BE
EB
13
22
BE
B
E
9V
MIC
E
EB
B
EB
R151
17KEY21
5V R.SEAR
CH
F.SEARC
H
SEARC
HLED
KEY22D
GN
D
CN
911
C651
C652
C653
C654
C732 C
733
C734
C735
C736
C737
D650
R650
R65
1
R73
1
R732
RY1RY2
CN
217
J81
110RELAY
B2
SWLGND
MAINR
MRGND
MAINL
SWRGND
S/WRD
MLGND
S/WL
T001B
C30
1
C302
C305
C306
C307
C308
C309
C310
C311
C312
C360
C361
C362
CP301 CP302
D307
D308
D311
D312
D313
D314
D315
D360
D361
D362
IC301
IC303
IC304
IC305
Q302
Q303
Q304
Q360
Q36
1
Q362
R302
R303
R36
0
R36
1
R362
R363
R364
R365
R366
R367 R368
D316
CN216
RY301
Q301
D301
R301
E
6V9V
5V
E
E
8V
E
10V
A.GND
OUT
E
OUT
10V
3.3V
9V8V5.6V
POU
T
A.GN
D
M.G
ND
D.G
ND
S4
1
D.GND
E
3.3V
OUT
E
OUT
10
T001B
D91
8
D91
9
D92
0
FW915
FW915
R915
R916
R917
R918
R919
R920
S915
S916
S917
Q920
Q919
Q918
71
1 7
5VK11K12D
.GN
D
CD
1LEDC
D2LED
CD
3LED
BE
EB
BE
C956
C957
C96
0
C96
1
C96
2
C963
C1001
C10
02C
1004
C10
05
C10
06
C10
21
C10
22
C10
23
C1061
C1062C1063
C1064C1065C1066
C1067
C1067
C1068
FW713
D94
0
D94
1
D95
3
D95
4
D95
6
D95
7
D96
0
D96
1
D10
61
IC90
1
TW801
J102
1J1
022
JS95
6
JS96
0
JS96
2
L1001
L100
2L1003
Q940
Q941
Q953
Q954
Q95
6
Q960
Q1061
R93
1R
932
R93
3
R93
4
R93
5
R936
R93
7
R93
8
R93
9
R940
R941
R94
2
R94
3
R94
4
R94
5
R94
6R
947R
948
R94
9R
950
R95
1
R95
2
R953
R95
4
R95
5
R956
R96
0
R1021
R1022
R10
61
R10
62
R10
63
R10
64
R10
65
R1066
R1067R1068
R10
69
R10
70
R10
71
S931
S932
S933
S935
S936
S937
S938
S939
S942
S943
S944
S945
S946
S947
S948
S949
S950
S951
S952
D94
4D
943
D94
5D
942
J100
1
TW800
R92
9
CN
890
R93
0
D10
03
VR901
C1070
D10
62
R96
1
R964
R963R962
C93
5
-+
VOLU
ME
SUBW
OO
FER
VOLU
ME
MIC
1M
IC2
DU
BBIN
G
REV
MO
DE C
DR
EC
STO
P
REP
EAT
SELE
CT
RAN
DO
M
CD
TAPE
PRO
GR
AM
DIS
PLAY
MO
DE
TIM
ER/C
LOC
K
AUX
FM/A
M
EON
PTY/
HP
5V
DGND
AUXLED
KEY31
KEY21
KEY2
KEY3
KEY42
KEY4
SMVOL-
SMVOL+
TPLED
VOL+
VOL-
SMLED
BSSLED
CDLED
TULED
MIXIN
AGND
1
BASSVOL+
BASSVOL-
DEC
KA/B
B E
EB
B E
1
24
8
1
EB
REC
STAR
T
EDIT
STO
P
24
SOU
ND
MO
DE
EXC
EPTU
P&U
Y
FOR
USE
RIE
S
B
E
MIC
LEVE
L
BE
BE
1
HPL
AGN
DH
PR
1
FW71
3
22
CN890
9V22
Operation switch boardDisplay & system control board
CD eject board
Speaker terminal boardVoltage board
Front board
HA B C D E F G
1
2
3
4
5
2-14
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
Head amplifer & mechanism control board CD servo cotrol board
C251
C25
2
C253
C254
C291
C601 C602C603C604
C605
C606R61
4
C610
C611
C612
C61
3
C614C615C616
C619
C621
C623
C62
4
C631
C632
C633
C641
C64
2
C651
C652
C65
3
C65
5
C656
C657
C65
8
C66
1
C663
C664
C665
C667 C669
C67
3
C67
6
C677
C67
9
C68
0
C69
3C
694
C801C802
C811
C812
C813
C814
C81
5
C81
6
C821
C822
C852
C855
C859
C860
CN
651
CN
851
CN
854
CN
855
IC60
1
R616
R609
IC801
C61
8
Q632
L851
L853
L854
M852
Q291
Q631
Q84
2
R253
R258R259
R293
R257
B603
R261R262R263
R264
B604
R291
R292
R294
R601
R602
R603
R604
R60
6
R611 R61
3
R61
7
R631
R632R634R635R636
R64
1
R642
R615
B611
B605
R651R652
R65
3 R654
R65
6
R65
7R65
8
R65
9
R661
R662
R663
R664
R665
R66
6
R667R66
9
R670
R68
2
R683
R685
R254
R255R256
R691
R69
2R64
7
R650
R67
7
R801R802
R803R804
R805R806
R807
R808
R809
R81
1
R812
R813
R831
R83
2
R84
2
R851
R852R853
R854
R855
R856
R67
8R
679
R861R862R863
R864R865R866
R871R872R873
R874R875R876
R880R881R882
R883
R884R885
R886R887
R888
R889
R890
R891R892R893
R894
R895
R673
W60
1
CN
151
X651
M851
C62
2
B609
B652
R67
4
C62
0
R675
R67
6
B602
B601
R610
R64
6
R66
0
R633
R60
8
X251
B625
R607
B651
B654
B639
B621
B638
C668
R251
B655
B647
B622
IC851
C853
C666
R68
4
B630
B631
IC852
B653
B641
R25
2
R686
C854
B640
B650
D851
C65
9
C60
7
R688
B648
R67
2
R687
B649
R619
CN601
C67
2
B637
C67
1
R621
R620
R618
R64
8
R64
9
R668
C617
R62
2
R623
R624
R625
C60
8
2-15
1
2
3
4
5
A B C D
MX-GT98V/MX-GT95V/MX-GT88VMX-GT85V/MX-G78V/MX-G75V
VCD board(Forward side)(Reverse side)
C10
1
C102
C103
C104
C105
C10
6C10
7
C109 C11
0
C111
C112
C113
C114
C115
C11
6 C117
C118
C12
0
C121
C12
2C
123
C12
4C
125
C12
6
C127
C12
8
C129
C13
0
C131
C132
C133
C13
4
C13
5C
136
C13
7
C13
8
CN101
D101
D102
IC101
IC10
2
IC103
IC104
K101
K102
K103
K104
L101
L102
Q10
1
R101
R102
R10
3R
104
R105
R10
6R
107
R10
8R
109
R11
1
R11
2R
113
R11
8R
119
R12
0
R121R128R130 R132
R135R136
R13
7
R13
8
R139
R14
0
R14
1
R14
5
R14
6R
147
X101
R13
4R
133
CN102
R14
8
IC105
Tuner board