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SERVICE MANUAL
COMPACT DISC DECK RECEIVER
HCD-GX255/RG170/RG470Ver. 1.3 2005.10
9-879-612-042005J05-1 2005.10
Sony CorporationPersonal Audio GroupPublished by Sony Engineering Corporation
Continued on next page
Canadian ModelHCD-GX255
AEP ModelE Model
HCD-RG170/RG470
Australian ModelHCD-RG170
Photo: HCD-GX255
HCD-GX255 is the amplifier, CD player, tapedeck and tuner section in MHC-GX255.
HCD-RG170 is the amplifier, CD player, tapedeck and tuner section in MHC-RG170.
HCD-RG470 is the amplifier, CD player, tapedeck and tuner section in MHC-RG470.
SPECIFICATIONS
Model Name Using Similar Mechanism NEWCDM74KFS-F1BD81C (Except Mexican model) or
CD Mechanism Type CDM74KFS-K6BD83S (Canadian, AEP, East European, Russian, E2, E51 models)/CD CDM74KFS-F1BD84 (Mexican model)Section BU-F1BD81C (Except Mexican model) or
Base Unit Name BU-K6BD83S-WOD (Canadian, AEP, East European, Russian, E2, E51 models)/BU-F1BD84 (Mexican model)
Optical Pick-up Block Name KSM-215DCP or KSM-213DCPTAPE Model Name Using Similar Mechanism HCD-GX355/RG270Section Tape Transport Mechanism Type CWM43FF13
Amplifier sectionCanadian model:HCD-GX255Continuous RMS power output (reference):
65 + 65 watts (6 ohms at 1 kHz, 10% THD)
Total harmonic distortion less than 0.07% (6 ohms at 1 kHz, 40 W)
European and Russian models:HCD-RG470DIN power output (rated): 110 + 110 watts (6 ohms at
1 kHz, DIN)Continuous RMS power output (reference):
140 + 140 watts (6 ohms at 1 kHz, 10% THD)
Music power output (reference):280 + 280 watts (6 ohms at 1 kHz, 10% THD)
HCD-RG170DIN power output (rated): 20 + 20 watts (6 ohms at
1 kHz, DIN)Continuous RMS power output (reference):
25 + 25 watts (6 ohms at 1 kHz, 10% THD)
Music power output (reference):50 + 50 watts (6 ohms at 1 kHz, 10% THD)
Other models:HCD-RG470The following measured at AC 120, 127, 220, 240 V 50/60 HzDIN power output (rated): 130 + 130 watts (6 ohms at
1 kHz, DIN)Continuous RMS power output (reference):
160 + 160 watts (6 ohms at 1 kHz, 10% THD)
HCD-RG170The following measured at AC 120, 127, 220, 240 V 50/60 HzDIN power output (rated): 50 + 50 watts (6 ohms at
1 kHz, DIN)Continuous RMS power output (reference):
65 + 65 watts (6 ohms at 1 kHz, 10% THD)
InputsAUDIO IN (stereo mini jack):
voltage 250 mV, impedance 47 kilohms
MIC (phone jack) (Latin American model only):sensitivity 1 mV, impedance 10 kilohms
OutputsPHONES (stereo mini jack):
accepts headphones of 8 ohms or more
VIDEO OUT (phono jack) (Mexican model only):max. output level 1Vp-p, unbalanced, Sync negative, load impedance 75 ohms
SPEAKER: accepts impedance of 6 to 16 ohms
AbbreviationE2 : 120V AC area in E modelE51 : Chilean and Peruvian models
2HCD-GX255/RG170/RG470
Tape deck sectionRecording system 4-track 2-channel, stereoFrequency response 50 13,000 Hz (3 dB),
using Sony TYPE I cassettes
Tuner sectionFM stereo, FM/AM superheterodyne tunerFM tuner sectionTuning rangeNorth American model: 87.5 108.0 MHz
(100 kHz step)Other models: 87.5 108.0 MHz
(50 kHz step)Antenna FM lead antennaAntenna terminals 75 ohms unbalancedIntermediate frequency 10.7 MHzAM tuner sectionTuning rangePan-American models: 530 1,710 kHz
(with the tuning interval set at 10 kHz)531 1,710 kHz (with the tuning interval set at 9 kHz)
European, Russian and Saudi Arabian models:531 1,602 kHz (with the tuning interval set at 9 kHz)
Other models: 530 1,710 kHz (with the tuning interval set at 10 kHz)531 1,602 kHz (with the tuning interval set at 9 kHz)
Antenna AM loop antennaIntermediate frequency 450 kHz
GeneralPower requirementsNorth American model: 120 V AC, 60 HzEuropean and Russian models:
230 V AC, 50/60 HzAustralian model: 230 240V AC, 50/60 HzArgentine model: 220 V AC, 50/60 HzMexican model: 127 V AC, 60 HzSaudi Arabian model: 120 127, 220 or
230 240V AC, 50/60 HzAdjustable with voltage selector
Other models: 120 V, 220 V or 230 240V AC, 50/60 Hz Adjustable with voltage selector
Power consumptionCanadian model:HCD-GX255: 110 wattsEuropean and Russian models:HCD-RG470: 240 watts
0.25 watts (at the Power Saving Mode)
HCD-RG170: 70 watts0.25 watts (at the Power Saving Mode)
Other models:HCD-RG470: 170 wattsHCD-RG170: 125 watts
Dimensions (w/h/d) (excl. speakers)Approx. 280 325 430 mm
Mass (excl. speakers)Canadian model:HCD-GX255: Approx. 8.5 kgEuropean and Russian models:HCD-RG470: Approx. 10.0 kgHCD-RG170: Approx. 7.2 kgOther models:HCD-RG470: Approx. 10.4 kgHCD-RG170: Approx. 8.5 kg
Design and specifications are subject to change without notice.
CD player sectionSystem Compact disc and digital
audio systemLaser Diode Properties Emission duration:
continuousLaser Output*: Less than 44.6W
* This output is the value measurement at a distance of 200mm from the objective lens surface on the Optical Pick-up Block with 7mm aperture.
Frequency response 2 Hz 20 kHz (0.5 dB)Signal-to-noise ratio More than 90 dBDynamic range More than 90 dB
3HCD-GX255/RG170/RG470
Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C
during repairing. Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times). Be careful not to apply force on the conductor when soldering
or unsoldering.
This appliance is classified as a CLASS 1 LASER product.This marking is located on the rear exterior.
CAUTIONUse of controls or adjustments or performance of proceduresother than those specified herein may result in hazardous radiationexposure.
UNLEADED SOLDERBoards requiring use of unleaded solder are printed with the lead-free mark (LF) indicating the solder contains no lead.(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARKUnleaded solder has the following characteristics.
Unleaded solder melts at a temperature about 40 C higherthan ordinary solder.Ordinary soldering irons can be used but the iron tip has to beapplied to the solder joint for a slightly longer time.Soldering irons using a temperature regulator should be set toabout 350 C.Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful! Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)than ordinary solder so use caution not to let solder bridgesoccur such as on IC pins, etc.
Usable with ordinary solderIt is best to use only unleaded solder but unleaded solder mayalso be added to ordinary solder.
SAFETY-RELATED COMPONENT WARNING!!COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINEWITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTS WHOSEPART NUMBERS APPEAR AS SHOWN IN THIS MANUAL ORIN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT!
LES COMPOSANTS IDENTIFIS PAR UNE MARQUE 0 SURLES DIAGRAMMES SCHMATIQUES ET LA LISTE DESPICES SONT CRITIQUES POUR LA SCURIT DEFONCTIONNEMENT. NE REMPLACER CES COM- POSANTSQUE PAR DES PICES SONY DONT LES NUMROS SONTDONNS DANS CE MANUEL OU DANS LES SUPPLMENTSPUBLIS PAR SONY.
4HCD-GX255/RG170/RG470
TABLE OF CONTENTS
1. SERVICING NOTES ............................................... 5
2. GENERAL ................................................................... 6
3. DISASSEMBLY3-1. Disassembly Flow ........................................................... 83-2. Case (Top) ....................................................................... 93-3. Door (CD) ........................................................................ 93-4. Front Panel Section ......................................................... 103-5 Mechanical Deck (CWM43FF13) ................................... 103-6. CD Mechanism Deck (CDM74KFS-F1BD81C
(Except MX model)/CDM74KFS-F1BD84(MX model)) .................................................................... 11
3-7. Back Panel Section .......................................................... 113-8. MAIN Board .................................................................... 123-9. BD Board/CD Board ....................................................... 123-10. DRIVER Board, SW Board ............................................. 133-11. Optical Pick-up Block (KSM-215DCP) .......................... 133-12. SENSOR Board ............................................................... 143-13. MOTOR (TB) Board ....................................................... 143-14. MOTOR (LD) Board ....................................................... 15
4. TEST MODE .............................................................. 16
5. ELECTRICAL ADJUSTMENT ............................ 20
6. DIAGRAMS6-1. Block Diagram CD SERVO Section ........................ 216-2. Block Diagram AUDIO/VIDEO Section ................. 226-3. Block Diagram AMP Section ................................... 236-4. Block Diagram
PANEL, POWER SUPPLY Section .......................... 246-5. Printed Wiring Board
CD Board (Except MX model) ................................. 266-6. Schematic Diagram
CD Board (Except MX model) ................................. 276-7. Printed Wiring Board BD Board (MX model) ......... 286-8. Schematic Diagram BD Board (MX model) ............ 296-9. Printed Wiring Boards CHANGER Section ............. 306-10. Schemtic Diagram CHANGER Setion ..................... 316-11. Printed Wiring Board MAIN Board (Suffix-11) ...... 326-12. Schematic Diagram MAIN Board (1/3)
(Suffix-11) ....................................................................... 336-13. Schematic Diagram MAIN Board (2/3)
(Suffix-11) ....................................................................... 346-14. Schematic Diagram MAIN Board (3/3)
(Suffix-11) ....................................................................... 356-15. Printed Wiring Board MAIN Board (Suffix-12) ...... 366-16. Schematic Diagram MAIN Board (1/3)
(Suffix-12) ....................................................................... 376-17. Schematic Diagram MAIN Board (2/3)
(Suffix-12) ....................................................................... 386-18. Schematic Diagram MAIN Board (3/3)
(Suffix-12) ....................................................................... 396-19. Printed Wiring Board POWER Board
(GX255/RG170) .............................................................. 406-20. Schematic Diagram POWER Board
(GX255/RG170) .............................................................. 416-21. Printed Wiring Board POWER Board
(RG470: AEP, EE, RU) ................................................... 426-22. Schematic Diagram POWER Board
(RG470: AEP, EE, RU) ................................................... 436-23. Printed Wiring Board POWER Board
(RG470: E2, E51, AR, MX) ............................................ 44
6-24. Schematic Diagram POWER Board (RG470: E2, E51, AR, MX) ............................................ 45
6-25. Printed Wiring Boards AUDIO, MIC, HEADPHONE Boards ...................... 46
6-26. Schematic Diagram AUDIO, MIC, HEADPHONE Boards ...................... 47
6-27. Printed Wiring Boards CD-G Section (MX model only) ............................................................. 48
6-28. Schematic Diagram CD-G Section (MX model only) ............................................................. 49
6-29. Printed Wiring Board PANEL Section (1/2) ............... 506-30. Printed Wiring Board PANEL Section (2/2) ............... 516-31. Schematic Diagram PANEL Section (1/2) .................. 526-32. Schematic Diagram PANEL Section (2/2) .................. 536-33. Printed Wiring Boards TRANS Section
(GX255/RG170) .............................................................. 546-34. Schematic Diagram TRANS Section
(GX255/RG170) .............................................................. 556-35. Printed Wiring Boards TRANS Section
(RG470: AEP, EE, RU) ................................................... 566-36. Schematic Diagram TRANS Section
(RG470: AEP, EE, RU) ................................................... 576-37. Printed Wiring Boards TRANS Section
(RG470: E2, E51, AR, MX) ............................................ 586-38. Schematic Diagram TRANS Section
(RG470: E2, E51, AR, MX) ............................................ 59
7. EXPLODED VIEWS7-1. Overall Section ................................................................ 777-2. Back Panel Section .......................................................... 787-3. Front Panel Section ......................................................... 797-4. Key Section ..................................................................... 807-5. Chassis Section ................................................................ 817-6. Transformer Section ........................................................ 827-7. CD Mechanism Deck Section-1
(CDM74KFS-F1BD81C (Except MX model)/CDM74KFS-F1BD84 (MX model)) ............................... 83
7-8. CD Mechanism Deck Section-2(CDM74KFS-F1BD81C (Except MX model)/CDM74KFS-F1BD84 (MX model)) ............................... 84
8. ELECTRICAL PARTS LIST ................................ 85
AbbreviationAR : Argentina modelE2 : 120V AC Area in E modelE51 : Chilean and Peruvian modelEE : East European modelMX : Mexican modelRU : Russian model
5HCD-GX255/RG170/RG470SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UPBLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostaticbreak-down because of the potential difference generated by thecharged electrostatic load, etc. on clothing and the human body.During repair, pay attention to electrostatic break-down and alsouse the procedure in the printed matter which is included in therepair parts.The flexible board is easily damaged and should be handled withcare.
NOTES ON LASER DIODE EMISSION CHECKThe laser beam on this model is concentrated so as to be focused onthe disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission,observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATIONCHECKCarry out the S curve check in CD section adjustment and checkthat the S curve waveforms is output three times.
MODEL IDENTIFICATION Back Panel
Label indication Model2-560-990-01 GX2552-560-991-01 RG170: AEP, EE, RU2-560-993-01 RG470: E2, E32-560-994-01 RG170: EA2-560-996-01 RG170: AUS2-560-997-01 RG170: E512-560-998-01 RG170: AR2-580-000-01 RG470: AEP, EE, RU2-580-001-01 RG470: E22-580-002-01 RG470: E512-580-003-01 RG470: MX2-580-004-01 RG470: AR
AbbreviationAR : Argentina modelAUS : Australian modelCND : Canadian modelE2 : 120V AC Area in E modelE3 : 240V AC Area in E modelE51 : Chilean and Peruvian modelsEA : Saudi Arabia modelEE : East European modelMX : Mexican modelRU : Russian model
Model number label
DISCRIMINATION OF THE MAIN BOARDThere are two types of suffix-11 and suffix-12 of the MAIN boardsused in set as follows.
MAIN BOARD (Component Side)
Part NumberAEP, EE, RU models : 1-865-919-12 onlyOther models : 1-865-919-11 or 1-865-919-12
6HCD-GX255/RG170/RG470SECTION 2GENERAL
This section is extracted frominstruction manual.
Location of Controls
Main unit
ALBUM +/ qsAUDIO IN wlAUDIO IN jack wf CD esCD SYNC wjDeck A wg Deck B qk DISC 1 3 qa DISC SKIP/EX-CHANGE qd Disc tray 0 DISPLAY 3 Display window 5 ECHO LEVEL1) waEFFECT ON/OFF 4 ENTER 4 EQ BAND qs GROOVE 4 ILLUMINATION 2MIC jack2) wd MIC LEVEL2) ws MULTIPLEX1) 6 Operation Dial
( EQ +/l L/ TUNING +) qj
P FILE 4 PHONES jack w; PLAY MODE 8 Power illuminator qg PRESET EQ 4 REC PAUS E/START wlRemote sensor 7SURROUND 4 TAPE A/B e; TUNER/BAND ea TUNING MODE 8 VOLUME control ql
?/1 (power) 1 X (pause) qs x (stop) qsM (fast forward) qsN (play) qsm (rewind) qs Z (eject) qf PUSH Z (deck B) (eject) qh Z PUSH (deck A) (eject) wh 1) Mexican model only2) Latin American model only
(Mexican model comes with 2 microphone jacks)
ALPHABETICAL ORDER
A O P Z
BUTTON DESCRIPTIO
j
s
S
H
l
L
A B
wd
12345678 q;
qf
qaqsqd
w;ql
waws
qgqh
qk
wf
wg
wjwh
wk
eae;
es
wl
qj
NS
7HCD-GX255/RG170/RG470
Remote control
ALBUM + qa ALBUM qd CD qk CLEAR qgCLOCK/TIMER SELECT 2 CLOCK/TIMER SET 3DISC SKIP q; DISPLAY wa ENTER 9 EQ qf
FM MODE 4 FUNCTION 6 PLAY MODE w; REPEAT 4SLEEP ws TAPE qj TUNER BAND 5 TUNER MEMORY qlTUNING MODE w; VOLUME +/ qs
?/1 (power) 1m/M (rewind/fast forward) 7
N (play) 8 X (pause) 8 x (stop) 8 +/ (tuning) qh ./> (go back/go forward) qh
ALPHABETICAL ORDER
A E F Z
BUTTON DESCRIPT
IONS
456
7
8
9
q;
ws 1
qd
qg
qf
waw;qlqkqj
qh
qa
qs
32
8HCD-GX255/RG170/RG470
This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3DISASSEMBLY
SET
3-2. CASE (TOP)(Page 9)
3-3. DOOR (CD)(Page 9)
3-8. MAIN BOARD(Page 12)
3-13. MOTOR (TB) BOARD(Page 14)
3-14. MOTOR (LD) BOARD(Page 15)
3-10. DRIVER BOARD, SW BOARD(Page 13)
3-4. FRONT PANEL SECTION(Page 10)
3-5. MECHANICAL DECK(CWM43FF13)(Page 10)
3-6. CD MECHANISM DECK(CDM74KFS-F1BD81C(EXCEPT MX MODEL)/CDM74KFS-F1BD84(MX MODEL))(Page 11)
3-9. BD BOARD/CD BOARD(Page 12)
3-11. OPTICAL PICK-UP BLOCK(KSM-215DCP)(Page 13)
3-12. SENSOR BOARD(Page 14)
3-7. BACK PANEL SECTION(Page 11)
9HCD-GX255/RG170/RG470
Note: Follow the disassembly procedure in the numerical order given.
3-2. CASE (TOP)
1 three screws(case 3 TP2)
2 two screws (B3)
7 two screws (B3)
3 case (side-R)
4 three screws(case 3 TP2)
6 case (side-R) 5 two screws (B3)
0 case (top)
8
89
9
2 Pull-out the disc tray.
3 two claws
4 door (CD)
1 Turn the pulley in the direction of the arrow.
Front panel side
CD mechanism deck BOTTOM VIEW
3-3. DOOR (CD)
10
HCD-GX255/RG170/RG470
3-4. FRONT PANEL SECTION
(E2, E51, AR, MX)
1 connector(CN061)
5 connector(CN066)
8 screw (B3)
7 screw(B3)
6 four screws (B3)
9 front panel section4 connector (CN065)
AbbreviationAR : Argentina modelE2 : 120V AC Area in E modelE51 : Chilean and Peruvian modelsMX : Mexican model
3 connector (CN201)2 connector(CN203)
(MX)
4 two screws(+BVTP 2.6 8)
6 screw(+BVTP 2.6 8) (except MX)(+BVTP 2.6 10) (MX)
5 two screws(+BVTP 2.6 8) (except MX)(+BVTP 2.6 10) (MX)
8 mechanical deck(CWM43FF13)
7 cover (TCM)
1 screw(+BVTP 2.6 8) (except MX)(+BVTP 2.6 10) (MX)
2 harness3 coating clip
(except MX) Abbreviation
MX : Mexican model
3-5. MECHANICAL DECK (CWM43FF13)
11
HCD-GX255/RG170/RG470
(MX)
(MX)
1 three screws (B3)
3 wire (flat type) (13 core) (CN701)
6 connector(CN1004)
7 CD mechanism deck(CDM74KFS-F1BD81C (except MX)/CDM74KFS-F1BD84 (MX))
4 wire (flat type) (27 core) (CN201) (Except MX)wire (flat type) (31 core) (CN201) (MX)
5 wire (flat type)(13 core) (CN331)
2
AbbreviationMX : Mexican model
1 connector(CN906)
2 connector(CN903)
3 connector(CN901)
5 connector(CN041)
6 two screws (B3)
7 two screws (B3)
8 back panel section
4 wire (flat type) (15 core)(CN381)
3-6. CD MECHANISM DECK(CDM74KFS-F1BD81C (EXCEPT MX MODEL)/CDM74KFS-F1BD84 (MX MODEL))
3-7. BACK PANEL SECTION
12
HCD-GX255/RG170/RG470
3-8. MAIN BOARD
3-9. BD BOARD/CD BOARD
1 connector(CN907)
2 connector(CN905) 3 two screws (B3)
5 MAIN board
4 connector(CN441)
MAIN board
5 BD board (MX)/CD board (except MX)
2 screw (+BVTP 2.6)
4 Remove soldering from the four points.1 wire (flat type) (16 core) (CN101)
3 gap tube
AbbreviationMX : Mexican model
13
HCD-GX255/RG170/RG470
3-11. OPTICAL PICK-UP BLOCK (KSM-215DCP)
3-10. DRIVER BOARD, SW BOARD
3 connector 4p (CN703)
4 DRIVER board
6 SW board
2 wire (flat type) 5p (CN702)
1 two screws (+BTTP (M2.6))
5 screw (+BTTP (M2.6))
4 two coil springs (insulator)
7 two coil springs (insulator)
5 two insulators
8 two insulators
0 screw (+BVTP 2.6 8)
qa gap tube
6 two floating screws (+PTPWH M2.6)
2 holder (213) ASSY
qs Remove the four solders of motor.
qd wire (flat type)(CN101)
qf BD board (MX)/CD board (except MX)
qg optical pick-up block (KSM-215DCP)
1 floating screw (+PTPWH M2.6)
3 two floating screws (+PTPWH M2.6)
9
AbbreviationMX : Mexican model
14
HCD-GX255/RG170/RG470
2 tray
3 belt (table)
5 pulley (table)
8 screw (+BTTP (M2.6))
0 SENSOR board
7 gear (geneva)
9 connector (CN731)
1 floating screw (+PTPWH M2.6)
6 floating screw (+PTPWH M2.6)
4 floating screw (+PTPWH M2.6)
6 Remove the two solderings of motor.
8 MOTOR (TB) board
7 table motor assy (M741)
5 two screws (+BTTP (M2.6))
4
3 wire (flat type) 5 core (CN742)
1 stopper
2 stopper
3-12. SENSOR BOARD
3-13. MOTOR (TB) BOARD
15
HCD-GX255/RG170/RG470
4 Remove the two solderings of motor.
3 MOTOR (LD) board
1 belt (loading)
5 loading motor assy (M751)
2 two screws (+BTTP (M2.6))
3-14. MOTOR (LD) BOARD
16
HCD-GX255/RG170/RG470SECTION 4TEST MODE
MC COLD RESETThe cold reset clears all data including preset data stored in theRAM to initial conditions. Execute this mode when returning theset to the customer.Procedure:
1. Press three buttons of x , [ILLUMINATION] and [DISC 1]simultane-ously.
2. The message COLD RESET is displayed on the fluorescentindicator tube momentarily, then becomes standby states.
AM TUNING INTERVAL CHANGE-OVER(Except AEP, East European, Russian model)A step of AM tuning interval can be changed over between 9 kHzand 10 kHz.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [TUNER/BAND] button to select AM.3. Press the I/1 button to turn the power off.4. Press two buttons of [PLAY MODE/TUNING MODE] and I/1
simultaneously.5. The message AM 9K STEP or AM 10K STEP is displayed
on the fluorescent indicator tube, and thus the channel step ischanged over.
CD SHIP (LOCK) MODEThis mode moves the optical pick-up to the position durable tovibration. Use this mode when returning the set to the customerafter repair.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press two buttons of [CD] and [POWER] simultaneously.4. The message LOCK is displayed on the fluorescent indicator
tube, and the CD ship mode is set.
CD SHIP (LOCK) MODE & COLD RESETThis mode is used to perform CD chip (lock) mode and cold resetsimultaneously.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press three buttons of x , [CD] and [DISPLAY] simultaneously.4. The message COLD RESET is displayed on the fluorescent
indicator tube momentarily, then becomes standby states.
CD TRAY LOCK MODEThis mode is used to unable to take sample disc out of tray in theshop.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Load a disc and press two buttons of x and Z for 5 seconds.4. The message LOCKED is displayed on the fluorescent
indicator tube and the CD tray is locked. (Even if pressingthe Z button, the message LOCKED is displayed on thefluorescent indicator tube and the CD tray is locked)
5. To release this mode, press two buttons of x and Z for 5seconds.
6. The message UNLOCKED is displayed on the fluorescentindicator tube and the CD tray is unlocked.
AMP TEST MODEThis mode is used to display the parameter of amplifier IC anddisplay the VACS status.Procedure:
1. Press the I/1 button to turn the power on.2. Press three buttons of x , [ILLUMINATION] and [PRESET EQ]
simultaneously.3. When the AMP test mode is activated, the message AMP
TEST IN is displayed on the fluorescent indicator tubemomentarily, then amplifier adjustment mode is displayed onthe fluorescent indicator tube.
4. Press the [DISPLAY] button to changed over between VACSstatus display mode and the amplifier IC parameter displaymode.
5. In this mode, press the [GROOVE] button to changed overDBFB on/off, and DBFB ON or DBFB OFF is displayedon the fluorescent indicator tube.
6. In this mode, press the [SURROUND] button to changed oversurround on/off, and SURROUND ON or SURROUNDOFF is displayed on the fluorescent indicator tube.
7. In this mode, press the [EQ BAND] button to enter the equalizeradjustment mode.In the equalizer adjustment mode, press the [EQ BAND] buttonto change over the adjustment band as LOW/MID/HIGH. Andturn the [ --- EQ + ]Ll knob to adjust the equalizer level ofeach bands.
8. To release the amplifier IC parameter display mode or equalizeradjustment mode, press the I/1 button to the power off.
17
HCD-GX255/RG170/RG470
AGING MODEThis mode can be used for operation check of CD section and tapedeck section.CD section and tape deck section work in parallel.If an error occurred:The aging operation stops only an error occurred sections and displaythen status.If no error occurs:The aging operation continues repeatedly.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Load three discs and insert two tape to the deck A and B.4. Press three buttons of x , [ILLUMINATION] and [DISC SKIP/EX-
CHANGE] simultaneously.5. Aging operations of CD and tape are started at the same time.6. To release this mode, press the I/1 button to turn the power
off or press the function buttons to change the function.
1. Display at the Aging ModeDisplay operating state of CD section and tape deck sectionalternately.If an error occurred, stop display which that section.
2. CD SectionThe sequence during the aging mode is following as below.Display at the aging mode is the same as the normal operation.
Aging mode sequence (CD section) :
Start (from disc 1)
Disc chucking
TOC read
Play first track for 2 seconds
Play last track for 2 seconds
EX-change open/close
Open the disc tray
Disc skip
Close the tray
Change the next disc.
3. Tape Deck SectionThe sequence during the aging mode is following as below.If an error occurred, stop display that step.
Aging mode sequence (tape deck section) :
Rewind the tape A and BTAPE AAG-1 or TAPE BAG-2
Shut off
FWD play the tape ATAPE AAG-3
2 minutes
Rewind the tape ATAPE AAG-6
Shut off
FWD play the tape BTAPE BAG-3
2 minutes
Rewind the tape BTAPE BAG-6
Shut off
Note: TAPE *AG-* is display of each step.
PANEL TEST MODEThis mode is used to check the fluorescent indicator tube, LEDsand buttons.Procedure:
1. Press the I/1 button to turn the power on.2. Press three buttons of x , [ILLUMINATION] and [GROOVE]
simultaneously.3. Fluorescent indicator tube and LEDs are all turned on.4. Press two buttons of [ALBUM ---] and [ENTER] simultaneously,
mode is changed over.5. In the key check mode, press each key, the defined key number
of every each key list is displayed on the fluorescent indicatortube.
6. In the key count check mode, KEYCNT 0 is displayed onthe fluorescent indicator tube. Each time a key is pressed, Kvalue increases. However, once a key is pressed, it is no longertaken into account.
7. In the headphone input check mode, connect the headphone,the message H_P ON is displayed on the fluorescentindicator tube, and disconnect the headphone, the messageH_P OFF is displayed on the fluorescent indicator tube.
8. In the volume check mode, VOLUME FLAT is displayedon the fluorescent indicator tube. Turn the [MASTERVOLUME] knob clockwise, the message VOLUME UPis displayed on the fluorescent indicator tube momentarilyand turn the [MASTER VOLUME] knob counterclockwise,the message VOLUME DOWN is displayed on thefluorescent indicator tube momentarily.
18
HCD-GX255/RG170/RG470
MC TEST MODEThis mode is used to check operations of microprocessor.Procedure:
1. Press the I/1 button to turn the power on.2. Press three buttons of x , [ILLUMINATION] and [DISC 3]
simultane-ously.3. When the MC test mode is activated, VACS level is displayed
on the fluorescent indicator tube momentarily.4. Turn the [ --- EQ + ]Ll knob clockwise, the message
ALL EQ MAX is displayed on the fluorescent indicatortube momentarily and turn the [ --- EQ + ]Ll knobcounter-clockwise, the message ALL EQ MIN isdisplayed on the fluorescent indicator tube momentarily.
5. Press the [PRESET EQ] button, the message ALL EQ FLATis displayed on the fluorescent indicator tube momentarily.
6. Turn the [MASTER VOLUME] knob clockwise, the messageVOLUME MAX is displayed on the fluorescent indicatortube momentarily and turn the [MASTER VOLUME] knobcounterclockwise, the message VOLUME MIN is displayedon the fluorescent indicator tube momentarily.
7. Press the [GROOVE] button to changed over VACS on/off.8. When the [CD SYNC] key is pressed with the test tape (AMS-
100, AMS-110A) in the deck, number of space between tunesis counted, then if AMS-110A is set, OK is displayed on thefluorescent indicator tube and if AMS-100 is set, NG isdisplayed on the fluorescent indicator tube.
9. Press the I/1 button to release from this mode, then cold resetis performed.
VERSION DISPLAY MODEThis mode is used to check the model, destination and softwareversion.Procedure:
1. Press the I/1 button to turn the power on.2. Press three buttons of x , [ILLUMINATION] and [DISC 2]
simultane-ously.3. When this mode is activated, model and destination is displayed
on the fluorescent indicator tube.4. Press the [DISPLAY] button to changed over between software
version and year, month, day of the software creation displaymode and model and destination display mode.
5. To release this mode, press three buttons of x , [ILLUMINATION] and [DISC 2] simultaneously.
CD ERROR CODE DISPLAY MODEThis mode can be used for error code display of CD section.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [CD] key to select CD.3. Press three buttons of x , [CD] and [DISC 1] simultaneously.4. When this mode is activated, mechanism deck error code is
displayed on the fluorescent indicator tube.5. Press the [GROOVE] button to changed over between optical
pick-up error code display mode and mechanism deck errorcode mode.
6. Turn the [ --- EQ + ]Ll knob to change over display of errorhistory.
7. To release this mode, press the I/1 button to turn the poweroff.
1. Mechanism Deck Error Code ModeWhen this mode is entered, mechanism deck error code is displayedwith the 10-character format on the fluorescent indicator tube.
The first digit from the left indicates:The first digit from the left indicates which mode the error historyis. In the mechanism deck error code mode, M is displayed onthe fluorescent indicator tube.
The second digit from the left indicates:(Error history number display)The second digit from the left indicates which order the error historyis. 1 indicates the latest error history, and each time the numberincreases by one, the error history goes back to one-previous error.
The third and 4th digit from the left indicates:(Error status display)The third and 4th digit from the left indicates which error status isindicated.
Display Status0 0 No error0 8 Table operation time-out (Table does not move to the target
position within the specified time)1 6 In the chucking down operation, the operation was retried
by the maximum number of times but the operation couldnot be completed
1 7 In the chucking up and down operation, the reverserecovery processing was attempted but it could not berecovered
1 8 In the chucking up operation, the operation was retried bythe maximum number of times but the operation could notbe completed
2 0 Loading operation time-out (Table does not move to thetarget position within the specified time)
2 2 As the chuck was in the ex-open status at the initialization,the closing was attempted but could not be completed
The 5th and 6th digit from the left indicates:(Present status display)The 5th and 6th digit from the left indicates which operating statuswhen an error occurred is indicated.
Display Status0 1 Open completion status0 2 From open status, the movement to chucking down position
is under way0 3 From chucking down position, the open operation is under
way0 4 Chucking down completion status1 0 The chucking down operation is under way1 1 The chucking up operation is under way1 2 Close completion status1 3 From close status, the ex-open operation is under way1 4 From ex-open status, the close operation is under way1 8 Ex-pen completion status
19
HCD-GX255/RG170/RG470
The 5th and 6th digit from the left indicates:(Error step display)The 5th and 6th digit from the left indicates which processing whena trouble occurred
Display Contents0 1 Power OFF in progress0 2 Initialize in progress0 3 Oscillation stopping0 4 From oscillation stop, oscillation starting0 5 Stopping0 6 Stop operation is under way0 7 Start operation in progress0 8 TOC read in progress0 9 Search operation is under way0 A Playback operation is under way0 B Pause operation is under way0 C Playback manual search operation is under way0 D Pause manual search operation is under way0 E
The 7th and 8th digit from the left indicates:The 7th and 8th digit from the left indicates which operation inprogress when a trouble occurred. (Step of each processing of the5th and 6th digits is indicated)
5 REPEAT LIMIT CANCEL MODENumber of repeat for CD playback is 5 times when the repeat modeis REPEAT. This mode is used to enables CD to repeat playbackfor limitless times.Procedure:
1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press three buttons of x , [CD] and [PLAY MODE/TUNING
MODE] simultaneously.4. The message LIMIT OFF is displayed on the fluorescent
indicator tube momentarily, CD repeat 5 limit is cancelled.
The 7th and 8th digit from the left indicates:(Motor status display)The 7th and 8th digit from the left indicates which motor outputstatus when an error occurred is indicated.
Display Status 0 No table motor output 1 Table motor forward output 2 Table motor backward output 3 Table motor break output0 No loading motor output1 Loading motor forward output2 Loading motor backward output3 Loading motor break output
The 9th and 10 th digit from the left indicates:(Tray status display)The 9th and 10th digit from the left indicates which target processingwhen an error occurred is indicated.
Display Status0 1 Open operation1 2 Close operation1 8 Ex-open operation
2. Optical Pick-up Error Code ModeWhen this mode is entered, optical pick-up error code is displayedwith the 8-character format on the fluorescent indicator tube.
The first digit from the left indicates:The first digit from the left indicates which mode the error historyis. In the optical pick-up error code mode, D is displayed on thefluorescent indicator tube.
The second digit from the left indicates:(Error history No. display)The second digit from the left indicates which order the error historyis. 1 indicates the latest error history, and each time the numberincreases by one, the error history goes back to one-previous error.
The third and 4th digit from the left indicates:(Error status display)The third and 4th digit from the left indicates which error status isindicated.
Display Status0 1 Not focused (TOC read without a disc)0 2 GFS NG (TOC read with a disc chucked)0 3 Start operation time-over0 4 Defocused continuously (Defocused during TOC reading)0 5 Q code not entered for specified time0 6 Tracking not turned ON0 7 Blank disc (Blank disc TOC read)
20
HCD-GX255/RG170/RG470SECTION 5
ELECTRICAL ADJUSTMENTSCD SECTION
Note:1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.2. Use YEDS-18 (3-702-101-01) unless otherwise indicated.3. Use an oscilloscope with more than 10M impedance.4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks. Abbreviation
MX: Mexican model
S-CURVE CHECK
Procedure:1. Connect an oscilloscope to TP (FE) and TP (VC) on the CD
board (except MX) or BD board (MX).2. Press the I/1 button to turn the power on.3. Load the disc (YEDS-18) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focussearch)
4. Confirm that the oscilloscope waveform (S-curve) issymmetrical between A and B. And confirm peak to peak levelwithin 3 0.5 Vp-p.
Note: Try to measure several times to make sure than the ratio of A : Bor B : A is more than 10 : 7.
Take sweep time as long as possible and light up the brightnessto obtain best waveform.
Connecting Location: CD board (except MX)BD board (MX)
RFAC LEVEL CHECK
Procedure:1. Connect an oscilloscope to TP (RFACO) and TP (VC) on the
CD board (except MX) or BD board (MX).2. Press the I/1 button to turn the power on.3. Load the disc (YEDS-18) and playback.4. Confirm that oscilloscope waveform is clear and check if RFAC
signal level is correct or not.Note: Clear RFAC signal waveform means that the shape can be clearly
distinguished at the center of the waveform.
Connecting Location: CD board (except MX)BD board (MX)
CD board (except MX)BD board (MX)
oscilloscope
TP(FE)TP(VC)
symmetryS-curve waveform
within 3 0.5 Vp-pA
B
TP(RFACO)
CD board (except MX)BD board (MX)
oscilloscope
TP(VC)
RF signal waveformVOLT/DIV : 200mVTIME/DIV : 500ns
level : 1.3 0.3 Vp-p
CD BOARD (Conductor Side) (except MX) BD BOARD (Conductor Side) (MX)
TP(VC)
TP(FE)
TP(RFACO)
IC101
2121
HCD-GX255/RG170/RG470
HCD-GX255/RG170/RG470
SECTION 6DIAGRAMS
52
54
MIACK8PO11/BUCK/AD1436MILP5RESET2
MICS4
MIDIO6MICK7
9 RIN4OUT12OUT2
M751(LOADING)M
LOADING MOTOR DRIVEIC701
7 FIN
MP3 DECODER
A/DCONVERTER
CH2OUTF
CH2OUTR
23
24
21
4
5
5
7
17
18
16
15
RFACI
ASYO
ASYI
FILTER
FILO PCO
CLTV FILI
DIGITAL PLLASYMMETRYCORRECTOR
EFMDEMODULATOR
CD DSPIC101 (1/2) (EXCEPT MX)
IC101 (1/2) (MX)
IC101 (2/2) (EXCEPT MX)IC101 (2/2) (MX)
IC251 (EXCEPT MX)IC251 (MX)
IC301 (EXCEPT MX)IC301 (MX)
IC901 (1/4) (SUFFIX-11)IC901 (1/4) (SUFFIX-12)
MDP
DIGITALCLV
PROCESSOR
32KRAM
ERRORCORRECTOR
INTE
RNAL
BUS
SQCK
SQSO
EXCK
AOUT1
C4M XTSL
XTAO
XTAI
AOUT2R-CHD/A
DIGITALINTERFACE
D/ACONVERTER
SELECTOR
CLOCKGENERATOR
SUBCODEPROCESSOR
SCOR
SCOR
WFC
KXU
GFGF
SEM
PH
SENS
DATA
CLOC
KXL
AT
SBSO
EXCK
WFC
K
SBSO
I-CD-
SENS
O-CD
-DAT
A
O-XL
T
TEI
FEI
FOCUS/TRACKING/SLED
SERVO DSP
FOCU
S/TR
ACKI
NG/S
LED
PWM
GEN
ERAT
OR
SFDR
CH3FIN
CH4IN
CH3RIN
CH3OUTF
CH3OUTR
CH1FIN
CH1RIN
CH2FIN
CH2RIN
20
MUTE
SRDR
TFDR
TRDR
FFDR
FRDR
SSTP
COUT
MIRR,DFCT, FOKDETECTOR
SERVO AUTOSEQUENCER
SERVOINTERFACE
CPU INTERFACE
SCLK
TO CPU INTERFACE
FOKMIRRDFCT
2OPIN+
CH4OUTF
CH4OUTF 27OPOUTM101
(SPINDLE)MOTORDRIVE
MOTORDRIVE
COILDRIVE
CH1OUTF
CH1OUTR
COILDRIVE
M
M
M102(SLED)
MOTOR/COIL DRIVE
2-AXISDEVICE
(TRA
CKIN
G)(F
OCUS
)
CD DSP
SIGNAL PATH
: CD PLAY
: VIDEO
14
13
11
12
I-SCO
R
ACD-L
BSCOR, SBSO,EXCK, WFCK
STANDBY
13
11
12
9
10
14
119
108
21 23
312
7
TO SERVO AUTOSEQUENCER
42
51 53
XPCK
11250 52
45
46
6
XRST
100
O-XRST47
96 97
81
78
117 93
77
86
98 99115107102 105104 110111113 68
31
O-CD
-CLK
33 45
LRCK
BCK
PCM
D
LRCK
IA
SDI0
63 66 65
16
BCKI
A
15
SFSY
/LRC
KIB
19
SBSY
/BCK
IB
18 14
LRCK
IBC
KIPC
MDI
SDO0
62 60 61
11
32 19
3
26
27
28
29
24
22
20
19
3736
E
B
A
CD +3V
F
DETECTOR
A
B
C
D
RFSUMMING
AMP
FOCUSERROR
AMP
TRACKINGERROR AMP
RFACO
FEO
TEOE
F
AUTOMATICPOWER
CONTROLQ10
APC LDAMP
LD
LDPD
LASER DIODE
OPTICAL PICK-UPBLOCK
(KSM-215DCP)
PD
I-V A
MP
D
C
EQ_IN
413534 EQ
AC_SUM RFAC
VCA
X17116.9344MHz
SYSTEM CONTROLLER
S101(LIMIT)
I-MP3-DI 29O-MP3-DATA 30
O-MP3-CLK 28O-MP3-CS 39I-MP3-ACK 40I-MP3-REQ 43O-MP3-LP 44
O-XTCN 34
O-MP3-RESET 38O-MP3-STB 42
R-ch is omitted due to same as L-ch.
XTACN95
48O-LM-R49O-LM-F
9 RIN4OUT12OUT2
M741(TABLE)M
TABLE MOTOR DRIVEIC712
7 FIN50O-TM-R51O-TM-F
73I-CD-NUMBER-SENS
I-E-1 I-E-3
56I-OPEN-SWS751
OPEN/CLOSEDETECT
OPEN
CLOSE
LEVEL SHIFTQ731
SWITCHINGIC501
TABLE ADDRESSSENSOR
IC731
ROTARYENCODER
S711
DISC TRAYADDRESS DETECT
AbbreviationMX : Mexican model
(MX)
(EXCEPT MX)
6-1. BLOCK DIAGRAM CD SERVO Section
(Page 22)
(Page 22)
2222
HCD-GX255/RG170/RG470
HCD-GX255/RG170/RG470
IC901 (2/4) (SUFFIX-11)IC901 (2/4) (SUFFIX-12)
SYSTEM CONTROLLER
INPUT SELECT, TONE CONTROL,ELECTRICAL VOLUME
58
MIC
HP/AUX IN
MIC IN
37TONE OUT1
15REC OUT1
33VOL OUT1
35
BBIN
1
VOL OUT1
DBFB
R-CH
19
SI
1 CD L
61 TUNER L
3 TAPE L
9 TAPE A1
7 PB OUT1
11 TAPE B1
63 MD L
3 DATA5 SFSY4 SBSY2 CLCK
52DEN
SBSOWFCKSCOREXCK
CDG/_BGC
36 VIN1
CD-LA
HP INE
SIGNAL PATH
: CD PLAY
: TAPE PLAY (DECK-A)
: REC R-ch is omitted due to same as L-ch.: TAPE PLAY (DECK-B)
: TUNER
: AUX IN
: MIC
: VIDEO
CETU
NED
STER
EODO DI
CLK
40
AMS
OUT
BAND-PASSFILTER
Q111, 112
FEED BACKSWITCH
Q141
55SA
OUT1
18
SC
66
I-LC7
2121
-DI
65
O-LC
7212
1-CL
K
68
O-LC
7212
1-CE
69
I-TUN
ED
70
I-STE
REO
90
O-RE
C/PB
91
O-BI
AS
67
O-LC
7212
1-DO
TU-M
UTIN
G
71
O-ST
-MUT
E
R-D
R-C
72
I-RDS
-DAT
A
18
I-RDS
-CLK
MIC
INHP
/AUD
IO IN
82
I-MIC
81
I-HP/
AUDI
O IN
92
I-TAP
E-AM
S
93
I-STR
EAM
94
I-VAC
S
D923 D921
1
O-BD
3401
-DAT
A
2
O-BD
3401
-CLK
87
O-B-
SOL
86
O-A-
SOL
85
O-M
OTOR
63
O-VM
UTE
60
I-CDG
-DET
59
I-CDG
-BGC
57
I-CDG
-MUT
E-DA
TA
58
0-CD
G-RS
T
CAPSTAN/REELMOTOR DRIVE
Q341, 342
PLUNGER DRIVE(DECK-A)Q345, 346
MM(CAPSTAN/REEL)
(DECK-A)
(DECK-B)
PLUNGER DRIVE(DECK-B)Q343, 344
A-HALF
A-MODE
REC (REW)
A-PHOTO
B-PHOTO
I-REEL-A
I-REEL-B
88
83
84
I-TAPE-A-STAT
B-HALF
B-MODE
REC (FWD)89I-TAPE-B-STAT
TAPE MECHANISMDECK BLOCK
AbbreviationAR : Argentina modelE2 : 120V AC Area in E modelE51 : Chilean and Peruvian modelsEE : East European modelMX : Mexican model
FM/AM TUNER PACK
AM
FM ANT
AM ANT
TUNER-L
TUNER-R
LC72121 CECE
R-CH
ANT GND
ANT GND
TUNEDTUNED
STEREOSTEREO
TU MUTETU-MUTING
LC72121 DIDO
LC72121 DODI
LC72121 CLKCLK
RDS DATAR-D
RDS CLKR-C
FM 75COAXIAL
BIAS OSCL201
REC BIASSWITCH
Q231, 232+9V
BIAS OSCQ201
PB MUTINGQ209
REC MUTINGQ205, 207
ERASE
HRPE1(REC/PB/ERASE)
(DECK-B)
HP1(PB)
(DECK-A)
L-CH
R-CH R-CH
R-CH
Q203
L-CH
R-CH R-CH
(AEP, EE)
(AEP, EE)
R-CH
J751AUDIO IN R-CH
+9V
JK801MIC 1
JK802MIC 2
VR801MIC LEVEL
VR851ECHO LEVEL
JK802MIC (E2, E51, AR)
(E2, E51, AR)
(MX)
(MX)
(MX)
(MX)
MUTINGQ801
MIC AMPIC801 (1/2)
ECHO AMPIC802
MIC AMPIC801 (2/2)
SCHMITTRIGGERIC1005
13 WE
C
G
B
37GDET
44VOUT
CDG-DET
VMUTE
6MUTEMUTE_DATA
CD GRAPHICSDECODER
IC1001
D-RAMIC1002
LEVEL SHIFTQ1005, 1009
VIDEO AMPIC1006
54RESET
DQ1 DQ4
A0 A7
VD0 VD3
VA0 VA7
CDG-RSTLEVEL SHIFTQ1002, 1006
VIDEO MUTINGQ1010
CDG/
_BGC
CDG-
DET
VMUT
E
MUT
E_DA
TACD
G-RS
T
25, 2
7, 2
9, 3
015
2
2
1, 2
, 24,
25
9
12, 1
4
17
WE 328 OEOE 2214 RASRAS 426 CASCAS 23
NTSC/PALSWITCHQ1001
J803VIDEO OUT
X100214.31818 MHz
59
60
XI1
XO1
IC101 (SUFFIX-11)IC101 (SUFFIX-12)
6-2. BLOCK DIAGRAM AUDIO/VIDEO Section
(Page 23)
(Page 21)
(Page 21)
(Page 23)
(Page 23)
2323
HCD-GX255/RG170/RG470
HCD-GX255/RG170/RG470
I-PRO
TECT
OR
95
O-ST
K-M
UTE
24
OVER LOADDETECT
Q441
PROTECTDETECT
Q487
RELAYSWITCH
Q488
TEMPERATUREDETECT
Q483, 484
TH441
R-CH
R-CH
VOL OUT1
R-CH
SIGNAL PATH R-ch is omitted due to same as L-ch.
: TUNER
D035
M001(FAN)
J701PHONES
FRONT SPEAKERIMPEDANCEUSE 6 16
+
+
R
L
R-CH
R-CH
RY B+
JK441
RY441
PROTECTORQ485
DC DETECTQ481, 482 FAN ON/OFF
Q044
FAN DETECTQ045RELAY DRIVE
Q486
STANDBYSWITCH
Q489
AMP ON/OFFQ933
LEVEL SHIFTQ490, 491
MUTINGQ251
MUTINGCONTROL
Q261
+ R-CH +
+
+
POWER AMP
MM
R-CH+
+
O-SY
S-M
UTE
23
C
DBFBG
HP INE
IC901 (3/4) (SUFFIX-11)IC901 (3/4) (SUFFIX-12)
SYSTEM CONTROLLER
(RG470)(RG470: E2, E51, AR, MX)
(RG170: AEP, EE, RU)
GX255/RG170/RG470: AEP, EE, RU
GX255/RG170: E2, E3,E51, EA, AR, AUS/RG470
IC251 (SUFFIX-11)IC251 (SUFFIX-12)
IC441 (GX255/RG170)IC441 (RG470: AEP, EE, RU)
IC441 (RG470: E2, E51, AR, MX)
BUFFER
AbbreviationAR : Argentina modelAUS: Australian modelE2 : 120V AC Area in E modelE3 : 120V AC Area in E modelE51 : Chilean and Peruvian modelsEA : Saudi Arabia modelEE : East European modelMX : Mexican modelRU : Russian model
6-3. BLOCK DIAGRAM AMP Section
(Page 22)
(Page 22)
(Page 22)
2424
HCD-GX255/RG170/RG470
HCD-GX255/RG170/RG470
6-4. BLOCK DIAGRAM PANEL, POWER SUPPLY Section
7
74 I-KEY097 I-POWER, DISPLAY
REMOTE CONTROLRECEIVER
IC610
S601, 602
6 I-VOL-A21 I-VOL-B
ROTARYENCODERVOLUME
STANDBY
S660
8SI1SO1
7SCK1
36 I-VFD-DATA35 O-VFD-DATA37 O-VFD-CLK
16CE6RESET
4 O-VFD-CE3 O-VFD-RESET
FL701FLUORESCENT
INDICATORTUBE
LED DRIVEQ601 606
D601 606(FRONT PANEL LED)
FL/LED DRIVERIC701
9
I-SIRCS-IN
F906
MAIN POWERTRANSFORMER
PT901
SUB POWERTRANSFORMER
PT902
RELAY DRIVEQ002
RECTD902 905
REGULATORQ903, 904
RECTD007, 008
RECTD001 004
+3.3V
UNREG
VF2
D006
Q902
D908
D301, 302
W001(AC IN)
RY901
B+ SWITCHQ041, 042
68
80
G1 G1326
3
1
STREAN LED1 STREAN LED6
S1 S21
S611 617,S621 626,S631 638,
S641 646, 648,SW601
19
22
KEY1 KEY4
26O-POWER-RELAY
5I-AC-CUT
12I-RESETRESET SWITCH
Q901
D902
D903
S901
120V
220V
240V
(EXCEPT E2, E3, E51, EA)
(MX)
(RG470)
(GX255/RG170/RG470: AEP, EE, RU)
(RG470: E2, E51, AR, MX)
(EXCEPT E2, E3, E51, EA)
(E2, E3, E51, EA)
F907RECT
D011 014
RECTD021 024
F904
F905
RECTD401
VOLTAGESELECTOR
BREGULATOR
Q902VP
+1.5VREGULATOR
IC303 (EXCEPT MX)IC303 (MX)
MP3 +1.5V
EVER +10V
VCCVREF, VDD
+9V REGULATOR+9V
+16V
RY B+
FAN B+
+5VREGULATOR
IC1003CDG +5V
M+9V
M+7V
REGULATORQ043
61O-CDG-POWER
20I-AC-PULSE
27O-FRONT-SP-RELAY
VF1
AMP B
AMP B+
F908
F909
RECTD401AMP VH
AMP +VH
RECTD402AMP VL
AMP +VL
B+ SWITCHQ1007, 1008
AbbreviationAR : Argentina modelE2 : 120V AC Area in E modelE3 : 240V AC Area in E modelE51 : Chilean and Peruvian modelsEA : Saudi Arabia modelEE : East European modelMX : Mexican modelRU : Russian model 4
5
58,
61
67
3
4X701
4.19MHzX1
X2
22 O-STBY-LEDD611
IC901 (4/4) (SUFFIX-11)IC901 (4/4) (SUFFIX-12)
IC011 (SUFFIX-11)IC011 (SUFFIX-12)
+9V REGULATORIC021 (SUFFIX-11)IC021 (SUFFIX-12)
VOLTAGE DETECTIC902 (SUFFIX-11)IC902 (SUFFIX-12)
+3.3V REGULATORIC006 (SUFFIX-11)IC006 (SUFFIX-12)
SYSTEM CONTROLLER
2525
HCD-GX255/RG170/RG470
HCD-GX255/RG170/RG470
Circuit Boards Location Note For Printed Wiring Boards and Schematic Diagrams
Indication of transistor
Note on Schematic Diagram: All capacitors are in F unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolyticsand tantalums.
All resistors are in and 1/4
W or less unless otherwisespecified.
f : internal component. 2 : nonflammable resistor. 5 : fusible resistor. C : panel designation.
A : B+ Line. B : B Line. Voltages and waveforms are dc with respect to ground
under no-signal conditions. CD/BD Section no mark :CD PLAY CD-G Section no mark : CD-G PLAY Other Sections no mark : FM( ) : CD PLAY : TAPE PLAY[ ] : TAPE REC
: Impossible to measure Voltages are taken with a VOM (Input impedance 10 M).
Voltage variations may be noted due to normal produc-tion tolerances.
Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal produc-tion tolerances.
Circled numbers refer to waveforms. Signal path.F : TUNER (FM/AM)E : TAPE PLAY (DECK A)d : TAPE PLAY (DECK B)G : RECJ : CD PLAYf : AUX INN : MICL : VIDEO
AbbreviationAR : Argentina modelAUS : Australian modelCND : Canadian modelE2 : 120 V AC Area in E modelE3 : 240 V AC Area in E modelE51 : Chilean and Peruvian modelsEA : Saudi Arabia modelEE : East European modelMX : Mexican modelRU : Russian model
Note on Printed Wiring Board: X : parts extracted from the component side. Y : parts extracted from the conductor side. f : internal component. : Pattern from the side which enables seeing.(The other layers' patterns are not indicated.)Caution:Pattern face side: Parts on the pattern face side seen from(Conductor Side) the pattern face are indicated.Parts face side: Parts on the parts face side seen from(Component Side) the parts face are indicated. Note:
The components identi-fied by mark 0 or dottedline with mark 0 are criti-cal for safety.Replace only with partnumber specified.
Note:Les composants identifis parune marque 0 sont critiquespour la scurit.Ne les remplacer que par unepice portant le numrospcifi.
Caution:Pattern face side: Parts on the pattern face side seen from(Side B) the pattern face are indicated.Parts face side: Parts on the parts face side seen from(Side A) the parts face are indicated.
C
BThese are omitted.
EQ
B
These are omitted.
C E
Q
BD board (MX)/CD board (EXCEPT MX)
CD-G board (MX)
SW board
MOTOR (LD) board
SENSOR board
DRIVER board
MOTOR (TB) board
MIC board(E2, E51, AR, MX)
VIDEO OUT board (MX)SUB TRANS boardAC1 board
(GX255/RG170/RG470: AEP, EE, RU)
TRANSFORMER board
PANEL board
VOL board
AUDIO IN board
HEADPHONE boardMAIN board
POWER board
MAIN board
2626
HCD-GX255/RG170/RG470
HCD-GX255/RG170/RG470
6-5. PRINTED WIRING BOARD CD Board (Except MX model)
M101(SPINDLE)
S101
R419
R412
R411
R410
R409
R408
R407
R406
R404
R403
R402
R401
R305
R303
R301
R252
R251
R182
R181
R163
R151
R143
R142R14
1
R133
R132
R131
R114
R113
R112
R111
R307
C313
C311
C310
C309
C307
C306
C252
C251
C194
C181
C320
C163
C162
C143
C142
C141
C133
C132
C131
C124
C111
C122
C115
C114
C113
C112
C185
C186
R306
CN101
CN202
CN201
C317
R203
R161C161
C211
C212
R204
C213
1-860-502-
13
(13)
(CONDUCTOR SIDE)CD BOARD
M
M102(SLED)
M
13
54
116
4833
49
64
32
17
OPTICALPICK-UP BLOCK
(KSM-215DCP)
(LIMIT)IC303
IC251
C10
C260
C14
C15C16
C13
C18
C11
R405C316
R354 R353R352
R351
R302
R253
C315
R191
R172
R171
R162
R313
R121
R12
R11
R10Q10
C116
C312
C184
C183
C303
C302
C305
C259
C258
C257
C255
C203
C196
C195
C201 C182
C171
C172
C12
C308
C151C134
C125
C314
C123
R165
R13
C17
FB301 C318
R201
C174
R205
C209
C210
X171
R173
(COMPONENT SIDE)CD BOARD
1-860-502-
13
(13)
E
TP (RFACO)
TP (FE)
TP (VC)
A
B
C
D
E
1 2 3 4 5 6 7 8 9
MAIN BOARDCN301
MAIN BOARDCN301
(SUFFIX-12)
(SUFFIX-11)
A3
A1
IC501
R501C501
IC101
IC301
: Uses unleaded solder. See page 25 for Circuit Boards Location.
(Page 32)
(Page 36)
2727
HCD-GX255/RG170/RG470
HCD-GX255/RG170/RG470
6-6. SCHEMATIC DIAGRAM CD Board (Except MX model) See page 60 for Waveforms. See page 61 for IC Block Diagrams.
R406
R407
R408
R409
R411
R412
R410
C151R203
C141
R143
R1
42
R141
C133
R133
R132
R131C134
TP
12
5
C125 R121
C15
C122C123
C1
32
C142
R151
C111
C113
C112
C114
R111
TP429
TP428
TP430
TP431
C115
C195
TP432
IC101
C1
63
R1
63
C196
R162
C210
C194
R253TP418
JPO004C251R252R251
C16R12
JPO10 R11
C17
C18
R10
TP10
TP11
TP12
TP13
TP14
TP15
TP16
TP17
TP18
TP19
C182
C201
C181
C258
C257
C252
C255
C260
R181
R182
C183
C184
C203C162
C161
R161
R352 TP427
TP103
TP104
TP105
C209
TP
43
6
TP
42
0
TP
42
1
C186
C185
R191
TP251
TP252
TP253
TP250
C306
R405
R404
R419
R403
R402
R401
R3
02
C317
R305
R301
C316C315
R313
C307
C302 C303C305 TP422
C312C313C314 C311 C309 C308
R303
C310
R353
R354
C11
C10
C14
C116
C318
R307
R351
TP433
TP187
TP401
TP409
TP411
TP410
TP434
TP419
TP412
TP413
TP414
TP415
TP416
TP417
TP408
TP407
TP406
TP405
TP404
TP403
TP402
TP186
R205
C320
C213
C212
C211
TP435
CN101
TP423
IC301
R1
73
Q10
C143
C171 R171
R172
R165
TP425
TP426
S101
C259
IC251
M102
M101
R201
R204
CN201
FB301
IC303
TP102
R306
R113
JPO103
R13
TP424
R112
R114
C1
24
C172
C131
C174X171
TP
TP
TP
R501
C501
IC501
100
100
100
100
100
100
100
10010V0
0.1
3.3k
1k4.7k
0.01
180k
10k
1M0.1
RFA
CI
0.1 15k
0.1
0.10.1
0.4
7
1500p
0
3300p
3300p
470p
470p
1k
FFDR
FRDR
TRDR
TFDR
0.1
0.1
MDP
CXD3059AR
0.1
10
0
0.1
47k
0.1
0.1
10kGAIN_SW
MDP6800p22k10k
1100k
APC 0
2204V
1000p
3.3
E
D
A
B
C
PD
F+
F-
T-
F-
0.1
10010V
0.1
0.1
0.1
0.1
0.1
22010V
100
100
226.3V
226.3V
10010V0.1
0.1
100
100
PCMDI
LRCK
PCMD
BCK
0.01
AV
DD
AG
ND
DG
ND
470p
470p
0
SP+
SL+
SL-
SP-
0.1
100
100
100
100
100
100
10
k
0.01
100k
100k
0.00220.1
220
0.1
0.1 0.12204VMP3GND
0.10.1474V 0.1 0.1474V
100k
0.1
100
100
10
10
0.1
10010V
0.01
10k
100
MP3VDD
MGND
MP3STB
DOUT
LOUT
ROUT
AVDD
XTCN
XRST
DATA
XLT
CLK
SENS
SCOR
MP3RST
MICS
MILP
MIDIO
MICK
MIACK
MP3REQ
MVDD
0 0
22p
22p
220p
DVDD
16P
IOP1
TC94A34FG-002
0
2SB1690K
0.1
22p 470
1M
0
SW+
SW-
0.1
BA5947FM
27P
BH15FB1WG
F
0
1k
TEI
1
IOP2
15k
15k
33
0p
27p
100p
0.116.9344MHz
(FE)
(VC
)
(RFA
CO
)
100
0.1
E
F
F
E
D
A
B
C
MIACK
MICK
MIDIO
MILP
MICS
SC
OR
SE
NS
CLO
CK
DA
TA
XR
ST
XLT
CLOCK
SENS
SCOR
XRST
MP3REQ
DATA
MP3STB
XTACN
XTA
CN
MP3STB
D
C
B
A
MP3RST
XLT
MP3REQ
MIACK
MICK
MIDIO
MILP
MICS
MP3RST
MDP
SFDR
SFD
R
SRDR
SR
DR
FRDR
FR
DR
FFDR
FFD
R
TFDR
TFD
R
TRDR
TR
DR
F+
F+
T+
T+
T-
T-
F-
F-
MDP
DOUT
DOUT
AOUT1
AOUT2
AOUT1
AOUT2
VC
VCC
PD
LD
T-
F-
T+
F+
VR
AGND
F
C
B
A
E
D
OP
IN-
OP
IN+
SW
CH
1FIN
CH
1R
IN
CH
2FIN
CH
2R
IN
GN
D
CN
F4
PO
WV
CC
CH
2O
UT
R
CH
2O
UT
F
CH
1O
UT
R
CH
4O
UT
R
CH
4O
UT
F
CH
3O
UT
F
CH
3O
UT
R
PO
WV
CC
MU
TE
GN
D
CH
3R
IN
CH
3FIN
CH
4IN
CH
4C
AP
A
OU
TV
RE
F
OP
OU
T
PR
EV
CC
MIRR
NC
DFCT
FOK
VSS
LOCK
MDP
SSTP
IOVSS1
SFDR
SRDR
TFDR
TRDR
FFDR
FRDR
IOVDD1
AVDD0
AVSS0
NC
E
F
TEI
TEO
FEI
FEO
VC
A
B
C
D
NC
AV
DD
4
RFD
CO
PD
SE
NS
AC
_S
UM
EG
_INLD
PD
RFC
AV
SS
4
RFA
CO
RFA
CI
AV
DD
3
BIA
S
AS
YI
AS
YO
NC
VP
CO
VC
TL
AV
SS
3
CL
TV
FIL
O
FIL
I
PC
O
AV
DD
5
DD
VR
OU
T
DD
VR
SEN
AV
SS
5
DD
CR
NCBCKI
LRCKI
LRCK
VSS
PCMD
BCK
VDD
EMPH
EMPHI
IOVDD2
DOUT
TEST
TEST1
IOVSS2
NC
XVSS
XTAO
XTAI
XVDD
AVDD1
AOUT1
VREFL
AVSS1
AVSS2
VREFR
AOUT2
AVDD2
NC
IOVDD0
RMUT
LMUT NC
XT
SL
IOV
SS
0
XT
AC
N
SQ
SO
SQ
CK
SB
SO
EX
CK
XR
ST
SY
SM
DA
TA
VS
S
XL
AT
CL
OC
K
VD
D
SE
NS
SC
LK
ATS
K
WFC
K
XU
GF
XP
CK
GFS
C2P
O
SC
OR
VD
D
C4M
WD
CK
CO
UT
PCMDI
VIN
GN
D
ST
BY
NC
VO
UT
DOUT
MP3(3.3V)
DVDD(3.3V)
AVDD(3.3V)
XTCN
SCOR
XLT
XRST
M+7V
SB
SY
/BC
KIB
SFS
Y/L
RC
KIB
TX
O
VD
D
CK
I/C
LO
CK
/
IRQ
/FIO
VS
S
PIO
0/S
DI2
/IO
0
PIO
1/S
DI3
/IO
1
PIO
2/I
O2
PIO
3/I
O3
PIO
4/F
I1/B
US
0/I
O4
PIO
5/F
I2/B
US
1/I
O5
PIO
6/F
I3/B
US
2/I
O7
PIO
7/B
US
3/I
O7
AD
4/P
O04
AD
3/P
O03
AD
2/P
O02
AD
1/P
O01
AD
0/P
O00
VS
S
VD
D
CK
O/P
O1
3/A
D1
6
VD
DX
XO
XI
VS
SX
TES
T
MIM
D
VS
SP
VC
OI
VDDP
RESET
STANBY
MICS
MILP
MIDIO
MICK
MIACK
VDDT
VSS
BCKO
LRCKO
SDO0
SDI0
BCKIA
LRCKIA
DATA
SDI1/
SDO2
CS/RAS/
AD15/CAS/
PO12
SDO3/OE
PO11/BUCK/AD14
PO10/CCE/AD13
PO9/AD12
PO08/AD11
SRMSTB
VDDT
AD10
AD9
AD8
PO07/AD7
PO06/AD6
AD5/PO05
VDDM
WE/SDO1
AUTOMATIC
CD DSP
(LIMIT)
MOTOR/COIL
(SPINDLE)
(SLED)
+1.5V REGULATOR
MP3 DECODER
CONTROL
POWER
DRIVE
CH
1O
UT
F
M-GND
M-GND
MP3-STB
MP3-REQ
MP3-ACK
MP3-DIO
MP3-LP
MP3-CS
MP3-CLK
MP3-RST
MP3-GND
CD-SENS
CD-CLK
CD-DATA
R-CH
A-GND
L-CH
D-GND
GND
VCCSWITCHING
(SUFFIX-11)
(SUFFIX-12)
(Page 35)
(Page 39)
2828
HCD-GX255/RG170/RG470
HCD-GX255/RG170/RG470
6-7. PRINTED WIRING BOARD BD Board (MX model only) See page 25 for Circuit Boards Location. : Uses unleaded solder.
M101(SPINDLE)
S101
R412
R422
R406R251
R252
R182
R181
R423
R151
R143
R142
R141
R133
R132
R131
R114
R113
R112 R111
CN101
C252
C251
C194
C181
C162
C143
C142
C141
C133
C132
C131
C124
C111
C122
C115
C114
C113
C112C185
C186
R204
R203
C161
R161
C211
C317
R306
C212
C163
C320
C213
R421
C306
C307
C309 C310
C311
C313
R307
R163
R301
R303
R305
R351
R352
R353
R354
R401
R402
R403R404
R405
R407
R408
R409R410
R419
CN201
R411
11
(11)
BD BOARD (CONDUCTOR SIDE)
M
M102(SLED)
M
IC30313
54
116
4833
49
64
32
17
IC251
OPTICALPICK-UP BLOCK
(KSM-215DCP)
C10
C260
C14
C15 C16
C18
C11
R253
R191
R172
R171
R162
C209 X171
R121
R12
R11
R10
Q10
C116
C184
C183
C303
C302
C305
C259
C258
C257
C255
C203
C196
C195
C201
C182
C171
C172
C210
C151
C134
C125
C123
R165
R13
C17
FB301
R201 R173
R205
C174
C318
C314
C308
C312
R313
C315
R302
C316
1-864-566-
11
(11)
BD BOARD (COMPONENT SIDE)
E
(LIMIT)
1-864-566-
TP (RFACO)
TP (FE)
TP (VC)
A
B
C
D
E
1 2 3 4 5 6 7 8 9
MAIN BOARDCN301
MAIN BOARDCN301
(SUFFIX-12)
(SUFFIX-11)
A4
A2
IC301
IC101
(Page 32)
(Page 36)
2929
HCD-GX255/RG170/RG470
HCD-GX255/RG170/RG470
6-8. SCHEMATIC DIAGRAM BD Board (MX model) See page 60 for Waveforms. See page 61 for IC Block Diagrams.
R406
R407
R408
R409
R411
R412
R410
C151R203
C141
R143
R1
42
R141
C133
R133
R132
R131C134
TP
12
5
C125 R121
C15
C122C123
C1
32
C142
R151
C111
C113
C112
C114
R111
TP429
TP428
TP430
TP431
C115
C195
TP432
IC101
C196
R162
C210
C194
R253TP418
JPO004C251R252R251
C16R12
JPO10 R11
C17
C18
R10
TP10
TP11
TP12
TP13
TP14
TP15
TP16
TP17
TP18
TP19
C182
C201
C181
C258
C257
C252
C255
C260
R181
R182
C183
C184
C203C162
C161
R161
R352 TP427
TP103
TP104
TP105
C209
TP
43
6
TP
42
0
TP
42
1
C186
C185
R191
TP251
TP252
TP253
TP250
C306
R405
R404
R419
R403
R402
R401
R3
02
C317
R305
R301
C316C315
R313
C307
C302 C303C305 TP422
C312C313C314 C311 C309 C308
R303
C310
R353
R354
C11
C10
C14
C116
C318
R307
R351
TP433
TP187
TP401
TP409
TP411
TP410
TP434
TP419
TP412
TP413
TP414
TP415
TP416
TP417
TP408
TP407
TP406
TP405
TP404
TP403
TP402
TP186
R205
C213
C212
C211
TP435
CN101
TP423
IC301
R1
73
Q10
C143
C171 R171
R172
R165
TP425
TP426
S101
C259
IC251
M102
M101
R201
FB301
IC303
TP102
R306
R113
JPO103
R13
TP424
R112
R114
C1
24
C172
C131
C174X171
C163R163
R423
R421
R422
CN201
R204
C320
TP
TP
TP
100
100
100
100
100
100
100
10010V0
0.1
3.3k
1k4.7k
0.01
180k
10k
1M0.1
RFA
CI
0.1 15k
0.1
0.10.1
0.4
7
1500p
0
3300p
3300p
470p
470p
1k
FFDR
FRDR
TRDR
TFDR
0.1
0.1
MDP
CXD3059AR
0.1
47k
0.1
0.1
10kGAIN_SW
MDP6800p22k10k
1100k
APC 0
2204V
1000p
3.3
E
D
A
B
C
PD
F+
F-
T-
F-
0.1
10010V
0.1
0.1
0.1
0.1
0.1
22010V
100
100
226.3V
226.3V
10010V0.1
0.1
100
100
PCMDI
LRCK
PCMD
BCK
0.01
AV
DD
AG
ND
DG
ND
470p
470p
0
SP+
SL+
SL-
SP-
0.1
100
100
100
100
100
100
10
k
0.01
100k
100k
0.00220.1
220
0.1
0.1 0.12204VMP3GND
0.10.1474V 0.1 0.1474V
100k
0.1
100
100
10
10
0.1
10010V
0.01
10k
100
MP3VDD
MGND
MP3STB
DOUT
LOUT
ROUT
AVDD
XTCN
XRST
DATA
XLT
CLK
SENS
SCOR
MP3RST
MICS
MILP
MIDIO
MICK
MIACK
MP3REQ
MVDD
0
22p
22p
220p
DVDD
16P
IOP1
TC94A34FG-002
0
2SB1690K
0.1
22p 470
1M
0
SW+
SW-
0.1
BA5947FM
BH15FB1WG
F
0
1k
TEI
1
IOP2
15k
15k
33
0p
27p
100p
0.116.9344MHz
0.1100
100
100
100
31P
0
1000p
(FE)
(VC
)
(RFA
CO
)
E
F
F
E
D
A
B
C
MIACK
MICK
MIDIO
MILP
MICS
SC
OR
SE
NS
CLO
CK
DA
TA
XR
ST
XLT
CLOCK
SENS
SCOR
XRST
MP3REQ
DATA
MP3STB
XTACN
XTA
CN
MP3STB
D
C
B
A
MP3RST
XLT
MP3REQ
MIACK
MICK
MIDIO
MILP
MICS
MP3RST
MDP
SFDR
SFD
R
SRDR
SR
DR
FRDR
FR
DR
FFDR
FFD
R
TFDR
TFD
R
TRDR
TR
DR
F+
F+
T+
T+
T-
T-
F-
F-
MDP
DOUT
DOUT
AOUT1
AOUT2
AOUT1
AOUT2
WFC
K
EX
CK
SB
SO
EXCK
SBSO
WFCK
VC
VCC
PD
LD
T-
F-
T+
F+
VR
AGND
F
C
B
A
E
D
OP
IN-
OP
IN+
SW
CH
1FIN
CH
1R
IN
CH
2FIN
CH
2R
IN
GN
D
CN
F4
PO
WV
CC
CH
2O
UTR
CH
2O
UTF
CH
1O
UTR
CH
4O
UTR
CH
4O
UTF
CH
3O
UTF
CH
3O
UTR
PO
WV
CC
MU
TE
GN
D
CH
3R
IN
CH
3FIN
CH
4IN
CH
4C
AP
A
OU
TV
RE
F
OP
OU
T
PR
EV
CC
MIRR
NC
DFCT
FOK
VSS
LOCK
MDP
SSTP
IOVSS1
SFDR
SRDR
TFDR
TRDR
FFDR
FRDR
IOVDD1
AVDD0
AVSS0
NC
E
F
TEI
TEO
FEI
FEO
VC
A
B
C
D
NC
AV
DD
4
RFD
CO
PD
SEN
S
AC
_S
UM
EG
_INLD
PD
RFC
AV
SS
4
RFA
CO
RFA
CI
AV
DD
3
BIA
S
AS
YI
AS
YO
NC
VP
CO
VC
TL
AV
SS
3
CLTV
FIL
O
FIL
I
PC
O
AV
DD
5
DD
VR
OU
T
DD
VR
SE
N
AV
SS
5
DD
CR
NCBCKI
LRCKI
LRCK
VSS
PCMD
BCK
VDD
EMPH
EMPHI
IOVDD2
DOUT
TEST
TEST1
IOVSS2
NC
XVSS
XTAO
XTAI
XVDD
AVDD1
AOUT1
VREFL
AVSS1
AVSS2
VREFR
AOUT2
AVDD2
NC
IOVDD0
RMUT
LMUT NC
XT
SL
IOV
SS
0
XT
AC
N
SQ
SO
SQ
CK
SB
SO
EX
CK
XR
ST
SY
SM
DA
TA
VS
S
XL
AT
CLO
CK
VD
D
SE
NS
SC
LK
AT
SK
WFC
K
XU
GF
XP
CK
GFS
C2
PO
SC
OR
VD
D
C4M
WD
CK
CO
UT
PCMDI
VIN
GN
D
STB
Y
NC
VO
UT
DOUT
MP3(3.3V)
DVDD(3.3V)
AVDD(3.3V)
XTCN
SCOR
XLT
XRST
M+7V
SB
SY
/BC
KIB
SFS
Y/L
RC
KIB
TX
O
VD
D
CK
I/C
LO
CK
/
IRQ
/FIO
VS
S
PIO
0/S
DI2
/IO
0
PIO
1/S
DI3
/IO
1
PIO
2/I
O2
PIO
3/I
O3
PIO
4/F
I1/B
US
0/I
O4
PIO
5/F
I2/B
US
1/I
O5
PIO
6/F
I3/B
US
2/I
O7
PIO
7/B
US
3/I
O7
AD
4/P
O0
4
AD
3/P
O0
3
AD
2/P
O0
2
AD
1/P
O0
1
AD
0/P
O00
VS
S
VD
D
CK
O/P
O13/A
D16
VD
DX
XO
XI
VS
SX
TE
ST
MIM
D
VS
SP
VC
OI
VDDP
RESET
STANBY
MICS
MILP
MIDIO
MICK
MIACK
VDDT
VSS
BCKO
LRCKO
SDO0
SDI0
BCKIA
LRCKIA
DATA
SDI1/
SDO2
CS/RAS/
AD15/CAS/
PO12
SDO3/OE
PO11/BUCK/AD14
PO10/CCE/AD13
PO9/AD12
PO08/AD11
SRMSTB
VDDT
AD10
AD9
AD8
PO07/AD7
PO06/AD6
AD5/PO05
VDDM
WE/SDO1
AUTOMATIC
CD DSP
(LIMIT)
MOTOR/COIL
(SPINDLE)
(SLED)
+1.5V REGULATOR
MP3 DECODER
CONTROL
POWER
DRIVE
CH
1O
UTF
M-GND
M-GND
MP3-STB
MP3-REQ
MP3-ACK
MP3-DIO
MP3-LP
MP3-CS
MP3-CLK
MP3-RST
MP3-GND
CD-SENS
CD-CLK
CD-DATA
R-CH
A-GND
L-CH
D-GND
D-GND
WFCK
SBSO
EXCK
A2MAIN BOARD
(3/3)CN301
A4MAIN BOARD
(3/3)CN301
(SUFFIX-11)
(SUFFIX-12)
(Page 35)
(Page 39)
3030
HCD-GX255/RG170/RG470
HCD-GX255/RG170/RG470
6-9. PRINTED WIRING BOARDS CHANGER Section : Uses unleaded solder. See page 25 for Circuit Boards Location.
CN751
IC731
CN731
CN741
CN742
CN721
DRIVER BOARD
11
(11)
S711ROTARY ENCODER
DISC TRAYADDRESS DETECT
SW BOARD
1-687-669-
12
(12)
SENSOR BOARD
1-68
7-13
2-
11
(11)
1-687-134-
12
(12)
MOTOR (TB) BOARD
MOTOR (LD) BOARD
1-687-133-
12
(12)
M751(LOADING)
M
21
M
M741(TABLE)
1 3
12
S751OPEN/CLOSE
DETECT
CLOSE
OPEN
A K
E C
A
B
C
D
E
F
1 2 3 4 5 6 7
C715
C731
C735
C736
R701
R711
R731
R721
R722
R723
R735
R732
R733
R734
D701
D711
C751
CN704
C737
R713
R712
C741
R702
JW70
2
JW70
3
JW70
4JW70
5
JW70
6
JW70
7
JW708
JW71
1
CN703
CN702
CN705
R751
C752
JW71
2
JW70
1
JW709
JW71
0
JW71
3
JW71
4
CN701
Q731
1-866-201-
1 9
1 9IC712
IC701
E
MAIN BOARDCN391C2
(SUFFIX-12)
MAIN BOARDCN391C1
(SUFFIX-11)
(Page 32) (Page 36)
3131
HCD-GX255/RG170/RG470
HCD-GX255/RG170/RG470
6-10. SCHEMATIC DIAGRAM CHANGER Section See page 61 for IC Block Diagrams.
C1MAIN BOARD
(3/3)CN391
C2MAIN BOARD
(3/3)CN391
C741
R702 R701
D701C751
C715
R713
R712 R711
D711
CN721
R7
22
R7
21
R7
23
C7
36
C7
35
C7
37
R731
C731
R733
R735
CN704
E3
E2
E1
CN703
CN742 CN702
CN741
IC731
CN751 CN705
C752 R751
CN731
Q731
M751
M741
S751
IC701
IC712
R734 R732
CN701
0.01
100 470
MTZJ-T-775.1A0.01
10016V
22k
4.7k 1k
MTZJ-T-773.6B
2P
4.7
k
4.7
k
4.7
k
0.1
0.1
0.1
100
1050V
1k
100
2P
4P
5P 5P
3P
RPI-576
2P 2P
0.1 4.7k
3P
DTC114ESA
BA6956AN
BA6956AN
12k 10k
13P
RN
FR
NF
TM-2
GND
TM-1
SENS-IN
SENS-OUT
GND
TM-1
TM-2
SENS-IN
SENS-OUT
GND
SENS-IN
SENS-OUT
GND
SENS-IN
SENS-OUT
GND GND
OPEN SW OPEN SW
LM-2
LM-1 LM-1
LM-2
GND
E-1
E-2
E-3
GND
VC
C
OU
T2
GN
D
VR
EF
OU
T1
VM
FIN
RIN
VC
C
OU
T2
GN
D
VR
EF
OU
T1
VM
FIN
RIN
LM-R
TM-R
E-1
E-2
E-3
TBL ADDRESS SENS
OPEN SW
(LOADING)
S711
DISC TRAY
ADDRESS DETECT
(TABLE)
TABLE ADDRESS SENSOR
OPEN
CLOSE
OPEN/CLOSE
DETECT
DRIVE
LOADING MOTOR
DRIVE
TABLE MOTOR
LEVEL
SHIFT
D+3.3V
CD-VM
LM-L
TM-L
GND
(SUFFIX-11)
(SUFFIX-12)
(Page 39)
(Page 35)
3232
HCD-GX255/RG170/RG470
HCD-GX255/RG170/RG470
6-11. PRINTED WIRING BOARD MAIN Board (Suffix-11) : Uses unleaded solder. See page 25 for Circuit Boards Location.
CN001
CN331
C041
C042
CN381
Q044Q043
CN041
CN301
R060
R059
CN991
JW12
1
JW10
9
JW19
2
C906
JW11
2
JW10
8
JW130
C921
C922
C302
JW007
C916
X902
X901
C266
C260
JW191
CN391
JW11
1
JW16
2
JW129
JW12
6
D301
JW20
5
JW20
4
D302
JW124
JW158
JW073
JW08
1
JW202
JW003
JW078
JW11
3
JW005
JW067 JW074
JW15
9
JW087
JW15
5
JW006
C301
JW032
JW001
D008
Q042
JW002
JW03
7
JW071
JW03
6
JW016
JW01
8
JW00
9
D007
C317
JW11
4
JW09
2
JW110
JW08
9
JW193
JW072
JW02
9
EP031
JW12
3
CN031
JW12
2
JW06
6
JW196
JW20
6
JW11
5
JW09
1
JW127
JW128
JW13
6
JW13
5
JW12
5
JW13
4
JW13
1
JW079
JW13
3JW
161
JW137
JW203
JW16
3
JW13
2
JW09
5JW09
7
JW11
9
JW11
7
JW09
4
JW20
7
JW20
8
JW03
0
JW031
JW04
3
JW06
9
JW194
C257
C258
C263
JW20
0
C182
C101
CN061
JW17
1
C229JW188
JW18
9
C144
C146
JW18
3
JW186
JW17
4
JW187
JW182
JW179
JW17
0
C181
CN201
C160
JW16
8
CN203
JW180
C211
C212
C156 C155
C183
C163
Q232
JW18
5
JW181
JW167
JW085
JW197
C184
C225 Q201
C214
JW16
9
C222
L201BIASOSC C
223
C224
C213
C199
C172C171
C265
C179
C180
C201
C202
C200
C149
C259
JW178
C145 C143
EP061 JW
175
JW19
8
C132C133
JW177
JW010
JW19
9
JW172
C113
JW164
CN066
JW16
5
CN06
5 C102
C105
C110
C106
C109
C116
C114
JW16
6
C119 C118
C111
C129 C130
C137C131
C136
JW034
JW15
7
JW195
JW201
JW16
0
JW03
3
JW08
4
JW03
8
JW023
JW028
JW01
5
C001
JW02
0
JW05
6
JW04
4
JW04
9
JW03
5
C007
JW05
5
IC006
JW05
4
JW05
9
JW05
0
JW06
2
JW019
JW04
8
JW04
5
JW06
3
JW05
2
JW04
7JW
051
JW06
0
JW05
3
JW03
9
JW01
1
D001 D004
JW004
JW025
JW01
2
JW04
6
C002
C005C013
JW014
JW017
IC011
D002
JW008
C011
D012
D013D022
C015
JW061
C025
C012
D014
D011
D024
D003
JW024
JW04
1
JW10
3
IC021
C023
JW013
D023
D021
JW151
JW10
6
JW14
2
JW14
1
C902
Q903
Q346
JW107
C901
JW09
9
Q344
JW143
JW10
0
JW146
JW09
8
JW08
2
JW08
3
JW07
6
JW08
0
JW145
JW138
JW11
8
JW150
JW14
0
JW101
JW09
6
JW07
5
JW12
0
JW11
6
JW07
7
JW08
6
JW09
0
JW13
9
JW10
5
JW152
Q342
JW14
9
JW144
JW156
CN341
JW154
JW153
JW148
JW04
2
JW06
4
JW05
7
JW147
JW10
4
JW05
8
R974
R973
R197
2R1
971
R065
C157
R127
R977
R258
R259
C305
R265
R063
R064
R106
IC251
R138
R140
R069
R136
R134
R976
R250
R251R252
R197
5
R