Sharp CD Es777

CD-ES777

SERVICE MANUAL

In the interests of user-safety the set should be restored to its

original condition and only parts identical to those specified be

used.

No. S1602CDES777/

CONTENTS

Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones formaintaining the safety and performance of the set.

!

This document has been published to be usedfor after sales service only.The contents are subject to change without notice.

PRECAUTIONS FOR USING LEAD FREE SOLDERCHAPTER 1. GENERAL DESCRIPTION[1] Important service notes ................................ 1-1[2] Specifications ................................................. 1-2[3] Names of parts............................................... 1-3

CHAPTER 2. ADJUSTMENTS[1] Mechanism section ........................................ 2-1[2] Test mode....................................................... 2-1[3] CD section...................................................... 2-4[4] CD Changer mechanism section ................... 2-5

CHAPTER 3. MECHANISM BLOCKS[1] Caution on disassembly ................................. 3-1[2] Removing and reinstalling the main parts ........ 3-4

CHAPTER 4. DIAGRAMS[1] CD Block diagrams ........................................ 4-1[2] Main Block diagrams...................................... 4-2

CHAPTER 5. CIRCUIT DESCRIPTION[1] Waveforms of CD circuit ................................ 5-1[2] Voltage ........................................................... 5-2

CHAPTER 6. CIRCUIT SCHEMATICS AND PARTSLAYOUT[1] Notes on schematic diagram .........................6-1[2] Types of transistor and LED ..........................6-1[3] Schematic diagram........................................6-2[4] Wiring side of PWB......................................6-10

CHAPTER 7. FLOWCHART[1] Troubleshooting .............................................7-1

CHAPTER 8. OTHERS[1] Function table of IC .......................................8-1[2] FL Display......................................................8-8

Parts Guide

MINI COMPONENT SYSTEM

CD-ES777MODELCD-ES777 Mini Component System consisting of CD-ES777(main unit) and CP-ES777 (speaker system).

CD-ES777

– i –

AudioXL-MP150Service ManualXLMP150MarketEPRECAUTIONS FOR USING LEAD-FREE SOLDER

1. Employing lead-free solder

Example:

Indicates lead-free solder of tin, silver and copper.

2. Using lead-free wire solderWhen fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire soldermay cause damage or accident due to cracks.As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 C, we recommend you to use adedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service stationor service branch in your area.

3. SolderingAs the melting point of lead-free solder (Sn-Ag-Cu) is about 220 C which is higher than the conventional lead solder by 40 C,and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the PWB for extended period oftime. However, Since the land may be peeled off or the maximum heat-resistance temperature of parts may be exceeded,remove the bit from the PWB as soon as you confirm the steady soldering condition.Lead-free solder contains more tin, and the end of the soldering bit may be easily corrected. Make sure to turn on and off thepower of the bit as required.If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every useof it.When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.Be careful when replacing parts with polarity indication on the PWB silk.

Lead-free wire solder for servicing

Ref No. DescriptionParts No.

PWB-A 92LPWB6505MANS

92LPWB6274LEDS

PWB-C

PWB-D

MAIN (A1), POWER (A2)

PWB-B 92LPWB6505DPLS

92LPWB6505CDUS

DISPLAY (B1), JACK (B2)

CD

LED

QPWBF0027AWZZ

QPWBF1055AWZZ

PWB-E

PWB-F

CD MOTOR (PWB ONLY)

CD CHANGER MOTOR (PWB ONLY)

"MAIN,DISPLAY,POWER,JACK,CD,CD MOTOR(PWB ONLY),CD CHANGER MOTOR (PWB ONLY),LED PWB" of this model employs lead-free solder.The LF symbol indicates lead-free solder, and is attached on the PWB and service manuals. The alphabetical characterfollowing LF shows the type of lead-free solder.

CD-ES777

[1] Important service notes

BEFORE RETURNING THE AUDIO PRODUCTBEFORE RETURNING THE AUDIO PRODUCT(Fire & Shock Hazard)Before returning the audio product to the user, perform the followingsafety checks.1. Inspect all lead dress to make certain that leads are not pinched or

that hardware is not lodged between the chassis and other metalparts in the audio product.

2. Inspect all protective devices such as insulating materials, cabinet,terminal board, adjustment and compartment covers or shields,mechanical insulators etc.

3. To be sure that no shock hazard exists, check for leakage current inthe following manner.

* Plug the AC line cord directly into a 120 volt AC outlet.* Using two clip leads, connect a 1.5 kohm, 10 watt resistor paralleled

by a 0.15 µF capacitor in series with all exposed metal cabinet partsand a known earth ground, such as conduit or electrical ground con-nected to earth ground.

* Use a VTVM or VOM with 1000 ohm per volt, or higher, sensitivity tomeasure the AC voltage drop across the resistor (See diagram).

* Connect the resistor connection to all exposed metal parts having areturn path to the chassis (antenna, metal cabinet, screw heads,knobs and control shafts, escutcheon, etc.) and measure the ACvoltage drop across the resistor.

All check must be repeated with the AC line cord plug connectionreversed.Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp. AC.) ormore is excessive and indicates a potential shock hazard which mustbe corrected before returning the audio product to the owner.

TO EXPOSED

METAL PARTS

CONNECT TO

KNOWN EARTH

GROUND

TEST PROBE

0.15 mF

1.5 kohms

10 W

VTVM

AC SCALE

1 – 1

CHAPTER 1: GENERAL DESCRIPTION

CD-ES777

– 3

[2] Specifications

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER

TO THE OPERATION MANUAL.

As part of our policy of continuous improvement, SHARP reservesthe right to make design and specifcation changes for productimprovement without prior notice. The performance specifcationfigures indicated are nominal values of production units .There maybe some deviations from these values in individual units.

ˇ General

ˇ Amplifier

ˇ CD player

ˇ Tuner

ˇ Cassette deck

ˇ Speaker

Power source AC 120 V, 60 Hz

Power consumption 135 W

Dimensions Width: 10-1/4" (260 mm)Height: 13" (330 mm)Depth: 12-7/8" (322 mm)

Weight 17 lbs. (7.7 kg)

Output power 150 watts minimum RMS per channel into6 ohms from 100 Hz to 20 kHz, 10% totalharmonic distortion

Output terminals Speakers: 6 ohms

Headphones: 16 - 50 ohms(recommended: 32 ohms)

Video output: 1Vp-p

Input terminals Game/Auxiliary (audio signal):500 mV/47 k ohmsGame/Video: 1Vp-p

Type 5-disc multi-play compact disc player

Signal readout Non-contact, 3-beam semiconductor laserpickup

D/A converter 1-bit D/A converter

Frequency response 20 - 20,000 Hz

Dynamic range 90 dB (1 kHz)

Frequency range FM: 87.5 - 108.0 MHzAM: 530 - 1,720 kHz

Frequency response 50 - 14,000 Hz (normal tape)

Signal/noise ratio 55 dB (TAPE-1 playback)50 dB (TAPE-2 recording/playback)

Wow and flutter 0.3 % (WRMS)

Type 3-way type speaker systemSuper tweeter2" (5 cm) tweeter6-5/16" (16 cm) woofer

Maximum inputpower

300 W

Rated input power 150 W

Impedance 6 ohms

Dimensions Width: 7-7/8" (200 mm)Height: 13" (330 mm)Depth: 10-3/8" (264 mm)

Weight 7.9 lbs. (3.6 kg)/each

1 – 2

CD-ES777

–2

[3] Names of parts

Display

1. Disc Number Indicators2. CD Play Indicator3. CD Pause Indicator4.Memory Indicator5. CD Repeat Play Indicator6. CD Indicator7. Extra Bass Indicator8. Tape Play Indicator9. FM Stereo Mode Indicator10. DailyTimer Indicator11. FM Stereo Receiving Indicator12. Tape 2 Record Indicator13. Sleep Indicator14. Timer Play Indicator15. Timer Recording Indicator

Rear panel

1. Cooling Fan2. AC Power Cord3. FM 75 Ohms Antenna Jack4. AM Antenna Ground Terminal5. AM Loop Antenna Terminal6. Speaker Light-Up Jacks7. Video Output Jack8. Speaker Terminals

ı Speaker system

876321 4 5

13 14 15

109 1112

AC INPUT

1. Tweeter2. Super Tweeter3. Woofer4. Bass Reflex Duct5. Speaker Wire6. Speaker Light-Up wire

1

2

3

4

56

Front panel

1. Disc Trays2. Timer Indicator3. Tuner (Band) Button4. CD Button5. Power On/Stand-by Button6. Tape (1 2) Button7.Game/Video Button8. Tape 1 Cassette Compartment9. Headphone Jack10.Game/Video Input Jacks11. Disc Tray Open/Close Button12. Disc Number Select Buttons13. Volume Control14. CD or Tape Stop Button15. CD Play or Repeat, Tape Play Button16. CD Track Up or Fast Forward, Tape 2 Fast Forward,

Tuner Preset Up, Time Up Button17. CD Track Down or Fast Reverse, Tape 2 Rewind,

Tuner Preset Down, Time Down Button18. Tape 2 Cassette Compartment19. Remote Sensor

1 – 3

CD-ES777

– 3

Remote control

1. Remote Control Transmitter2. Disc Number Select Buttons3. Clock/Timer Button4. Disc Direct Search Buttons5. Equalizer Mode Select Button6. Extra Bass/Demo Button7. Volume Up and Down Buttons8. Power On/Stand-by Button9. CD Button10. Tuner (Band) Button11. Tape (1 2) Button12.Game/Video Button13. CD Clear/Dimmer Button14. CD Random Button15. CD Stop Button16. Tape Stop Button17.Memory Button18. CD Pause Button19. CD Play or Repeat Button20. Tape Play Button21. Tape 2 Record Pause Button22. Tuning Up Button23. CD Track Up or Fast Forward, Tape 2 Fast Forward,

Tuner Preset Up, Time Up Button24. CD Track Down or Fast Reverse, Tape 2 Rewind,

Tuner Preset Down, Time Down Button25. Tuning Down Button

1

2

3

5

6

7

4

9

10

8

11

12

17

19

18

13

15

14

21

20

16

2524

22 23

1 – 4

CD-ES777

2 – 1

CHAPTER 2. ADJUSTMENTS

[1] Mechanism section• Driving Force Check

• Torque Check

• Tape Speed

Figure 1

Torque Meter Specified ValuePlay: TW-2111 Tape 1: Over 80 g

Tape 2: Over 80 g

Torque Meter Specified ValueTape 1 Tape 2

Play: TW-2111 30 to 80 g.cm 30 to 80 g.cmFast forward: TW-2231 — 70 to 180 g.cm

— 70 to 180 g.cm

Test Tape Adjust-ing Point

Specified Value

Instrument Connection

Normal speed

MTT-111 Variable Resistor in motor.

3,000 ± 30 HzSpeaker

Speaker Ter-minal (Load resistance: 6 ohms)

TAPE MECHANISM

Tape

Motor

Variable Resistor in motor

CD-ES777

2 – 2

[2] Test mode• Setting the test mode

During stand-by mode, press GAME/VIDEO button while pressing

down the button and button. then, press the CD button toenter the test mode.

IL isn’t done

OPEN/CLOSE operation is using manual. IL isn’t done

<< >>,<< >>buttons make pick's slide possible. IL isn’t done

to page 2-3<<PLAY>> key input.

C D T E S T

A

Do TOC IL. Do normal play.When these following key is input into PLAY key, track num-ber can be appoint directly.

<<MEMORY>>key input.

<< 1>> key: Track 4

<< 2>> key: Track 9

<< 3>> key: Track 15

Adjustment result automatically willdisplay as below for each 2 sec:a) "FOF_XXXX"b) "TOF_XXXX"c) "TBAL_XX"d) "TGAN_XX"f) "FGAN_XX"g) "RFLS_XX"

––––––––

<<STOP>> key input.

STOP

explanation:a) Focus off set = "FOF_XXXX"b)Tracking off set = "TOF_XXXX"c)Tracking balance = "TBAL_XX"d)Tracking Gain = "TGAN_XX"f) Focus Gain = "FGAN_XX"g) RF level shift = "RFLS_XX"VOL — Last memoryP.GEQ — FLATX-BASS — OFFTo cancel : Power OFF

CD-ES777

2 – 3

Sliding the PICKUP with<< >>, << >> button must only be inSTOP mode.

<<MEMORY>> key input.

Laser ON.


Tracking OFF play at that specific point.


Tracking ON play from that specific point.


Adjustment result automatically will display as below for each 2 sec :a) "FOF_XXXX"b) "TOF_XXXX"c) "TBAL_XX"d) "TGAN_XX"f) "FGAN_XX"g) "RFLS_XX"

<<STOP>> key input.

STOP

explanation:a) Focus off set = "FOF_XXXX"b)Tracking off set = "TOF_XXXX"c)Tracking balance = "TBAL_XX"d)Tracking Gain = "TGAN_XX"f) Focus Gain = "FGAN_XX"g) RF level shift = "RFLS_XX"VOL — Last memoryP.GEQ — FLATX-BASS — OFFTo cancel : Power OFF

A

CD-ES777

2 – 4

[3] CD sectionCD Error code description

* 'CHECKING'

If Error is detected, 'CHECKING' will be displayed instead of 'ER-CD**'. 'ER-CD**' display will only be displayed when error had beendetected for the 5th times.

Standard Specification of Stereo System Error Message Display Contents

(*) CHECKING:

If CD changer mechanism error is detected, 'CHECKING' will be dis-play instead of 'ER-CD**'. 'ER-CD**' display will only be display whenerror had been detected for the 5th times.

Speaker abnormal detection and +B PROTECTION display

In case speaker abnormal detection or +B PROTECTION hadoccurred, the unit will automatically enter to stand - by mode and Timerindicator will be flashing as below.

+B PROTECTION is condition when irregular process occur on powersupply line.

BEFORE TRANSPORTING THE UNIT

The following process need to be taken after set tapering/partsreplacement.

1. Press the ON/STAND-BY button to enter stand-by mode.

2. While pressing down the button and the button,press the GAME/VIDEO button. The Micro Computer version num-ber will be displayed as "CT*****".

3. Press button until "WAIT"→ "FINISHED" appears.

4. Unplug the AC cord and the unit is ready for transporting.

Error Explanation10* CAM error. Can't detect CAM switch when CAM is moving.11* When it detect cam operation error during initialize pro-

cess.20* TRAY error. Can't detect TRAY switch when TRAY is mov-

ing.21* When it detect TRAY operation error during initialize pro-

cess.31 When it change to CD function, DSP cannot read initial

data.

Error Contents Display NotesCD CD Changer Mechanism Error. 'ER-CD**' (*) 10: CAM SW Detection NG during normal operation

11: CAM SW Detection NG during initialize process20:TRAY SW Detection NG during normal operation21:TRAY SW Detection NG during initialize process

CD DSP Communication Error. 'ER-CD31' DSP COMMUNICATION ERROR.Focus Not Match/IL Time Over. 'NO DISC'

TUNER PLL Unlock. PLL Unlock.FM 87.5 MHz

FLASHING

1 FRAME

OFF OFF OFF OFF

(REPEAT)

ON

TIMER

LED

ON

NO. 1

NO. 2

NO. 1

NO. 2

NO.1 : +B Protection

NO.2 : Speaker abnormal

FLASHING

Example : In case of speaker abnormal

CD-ES777

2 – 5

[4] CD Changer mechanism section• A number in the drawing sheet is the number of the parts guide

(CHANGER MECHANISM PARTS).

140

141

HALF GEAR

MUST ARRANGE AS SHOWN

1

CD-ES777

2 – 6

2

139

APPLY SANKOL BEFORE FIX

FIX ITEM 1 ACCORDING TO THE

SHOWN PICTURE ABOVE

ROTATE MODE BIG GEAR UNTIL REACH AS SHOWN IN PICTURE

CD-ES777

2 – 7

APPLY GREASE

PULL THE LEVER UNITIL

REACH THE ARROW MARK

143

112

3

CD-ES777

2 – 8

FIGURE 1

FIGURE 2

APPLY GREASE SLOT CLAMP

SW ARM INSIDE BASE SLOTHALF GEAR MUST BE

ARRANGE AS SHOWN

152

142

118

4

CD-ES777

2 – 9

127

128

5

APPLY GREASE AT BOTTOM SIDE

OF GEAR FOLLOW MARKING

NO NEED APPLY GREASE AT BOTTOM

SIDE

O.K

BLACK MARKFIGURE 1

N.G

OTHER THAN FIGURE 1 DIRECTION ALL N.G

APPLY GREASE AT

TOP SIDE OF GEAR

FOLLOW MARKING

CD-ES777

2 – 10

APPLY GREASE AT

HALF GEAR AREA

ROTATE CLOCKWISE UNTIL REACH HERE (MAXIMUM)

6

129

CD-ES777

2 – 11

CHANGE COLOR TO BLACK

151150149

7

CD-ES777

2 – 12

124

131

TRAY BIG GEAR

CHANGE COLOR

TO BLACK

TRAY BIG GEAR

CHANGE COLOR

TO BLACK

GREASE APPLICATION LENGTH

GREASE APPLICATION PORTION

MUST FREE FROM GREASE THE SHOWN AREA

O . K

N . G

SHOWN HOLE MUST FACING ARROW DIRECTION

8

CD-ES777

2 – 13

TR-RE JOINT GEAR C

APPLY GREASE AT

BOTTOM SIDE ONLY

APPLY GREASE ONLY AT TOP SIDE GEAR

MUST FIX ACCORDING TO THE HOLE'S

138 126 125

9

CD-ES777

2 – 14

10

148 147 146 145

CD-ES777

2 – 15

APPLY GREASE

WHEN FIXING ITEM 2 MUST FOLLOW AS SHOWN

121

144130

11

CD-ES777

2 – 16

FIGURE 1

FIGURE 3

FIGURE 2

APPLY GREASE SC141

APPLY GREASE

117

12

CD-ES777

2 – 17

ITEM 2 , 3 MUST APPLY GREASE ON TOP SIDE GEAR ONLY

O . K N . G

TOP VIEW AFTER

ASSY

FIX REVERSE N.G

GEAR 112 GEAR 112

134

133

132

13

CD-ES777

2 – 18

APPLY GREASE BEFORE FIX

MOVE 112 UNTIL TOUCH THE WALL

DURING GEAR A ROTATE

MUST PRESS SHOWN AREA

AND LEVER B WILL MOVE

ARROW DIRECTION THEN

FIX PART 108SCREW TORQUE

A

B

APPLY GREASE

CONFIRM WHETHERFIXEDPROPELY OR NOT

108 803 x6

14

2 kgf-cm+0.5- 0

CD-ES777

2 – 19

APPLY GREASE

BEHIND THE LEVER NEED TO APPLY GREASE

PULL IT THEN LEVER WILL

MOVE IN

113

15

CD-ES777

2 – 20

APPLY GREASE

AT BOSS

APPLY GREASE

APPLY GREASE BEFORE FIX

SPRING MUST ARRANGE UNDER THE HOOK

O.K LR JOINT LEV

LR JOINT LEV

BOARD R

BOARD R

N.G

123

115

16

CD-ES777

2 – 21

APPLY GREASE

ASSY REVERSELY N.G

BIG SLOT MUST FACING OUT

WHEN FIX & AFTER FIX TO BASE CHASSIS

AFTER ASSY CONFIRM THE FREE DROP

GEAR POSITION DURING FIXING

103 137 136

17

CD-ES777

2 – 22

ASSY REVERSELY N.G

WHEN FIX & AFTER FIX TO BASE CHASSIS

AFTER ASSY CONFIRM THE FREE DROP

APPLY GREASE

BIG SLOT MUST FACING OUT

GEAR POSITION DURING FIXING

CONFIRM BOTH GEAR SIT PROPELY & LOCKED

18

104

135

136

CD-ES777

2 – 23

AFTER FIX OUTER UP/DOWN LEVER HOLD SHOWN PORTION AND

MOVE UP/DOWN THEN CONFIRM LEVER GO INSIDE THE HOLE OR NOT

IF NO GO INSIDE HOLE IS N.G

IF GO INSIDE HOLE

IS O.K

19

ALL OF THIS 135 AND 137 GEAR FIX TOGETHER WITH 119

AND 120 LEVER ( MOVE TOGETHER )

BIGGER SLOT FACING OUT

119

135

BIGGER SLOT FACING OUT

120

137

CD-ES777

2 – 24

20

110

BIG SLOT FACING OUT

CD-ES777

4 – 3

Figure 4-3: BLOCK DIAGRAM (3/3)

RL841

PT841SUB POWER

TRANSFORMER

D842~D845

IC854AN78L05

+B5

+B PROTECT

+B6

VL+

VL-

VH-

PT801

MAIN POWER

TRANSFORMER

+B6SW5V D803

IC851AN80T53

VOLTAGE REGULATOR

Q841

D905

AC 120 V, 60 Hz

-VF

VF2

VF1

Q801

+B3

+B7

+B4

+B8

D+5V

+B9 A_+5V

+B1

+B2

-B1

-B2

+B8

+B7

+B4

+B4

R

L

+B5

RX701

JOG701

JOGVOLUME

SENSORREMOTE

D804

D802

D801

RL914

JK692HEADPHONES

RELAYDRIVER

MOTORDRIVER

SPEAKERRELAY

M901FAN MOTOR

SO902SPEAKERTERMINAL

MQ906

Q905

Q709

Q713

Q904

Q901

Q903Q902

D906D907

21

IC901STK41242

POWER AMP.

2A/125VF803

2A/125VF804

5A/125VF805

F801

5A/125V

F8025A/125V

L-OUT

R-OUT

CLK

4.19 MHz

RESET

L-CH

R-CH

AC POWERSUPPLY CORD

REC/PLAY

VLOADRESET

REC/PLAY

T1/T2

BIAS

F1

F1

F2

F2

+B5+B5

+B5

+B5

VDD

VDD

AC_RLY

SP_RLY

VDD

SP. DET.

-

CE

DI

DO

XL701

-

BIAS

T1/T2

AVDD

PHOTO

SW725-SW725SW711-SW716SW701-SW707

KEY

SECTIONTO CD

T.F.

FL DISPLAYFL701

454432 411 2 215

79

80

83

38

37

34

31

33

29

76

117

8

256

VH+

1

3

3

7

2

6

1

1

14

18

84

1 2 4 5 3

1

2

3

100

11 1210 15 16 21 24 20 17 18 19

46 46 30

39

3128

4813254027

--

CONSTANTVOLTAGE REGULATOR

LD+8V

M+13V

A+10V

+5V

IC901

- --

78 69-

LED703

IC701IXA002AW

(SERAIL No.31200001~402xxxxx)IXA020AW

(SERAIL No.402xxxxx~)SYSTEM

MICROCOMPUTER

CD-ES777

5 – 1

CHAPTER 5. CIRCUIT DESCRIPTION

[1] Waveforms of CD circuit

T

FDO

TDO

Stopped

CH1=500 mV

DC 10:1

CH3=500 mV

DC 10:1

500 ms/div(500 ms/div)

NORM:20 kS/s

1

3

=Record Length=

Smoothing : ON CH1 : 0.000 V

CH2 : 0.0 V

Main : 100 K

Zoom : 2 K

Mode : AUTO

Type : EDGE CH1

Delay : 0.0 ns

Hold off : 0.2 µs

CH3 : 0.000 V

CH4 : 0.00 V

BW : FULL

=Trigger==Filter= =Offset=

CH1

v/DIV

500 mV

1 IC1 21

2 IC1 22

T

FDO

DRF

TE

Stopped

CH1=500 mV

DC 10:1

CH2=10 V

DC 10:1

CH3=1 V

DC 10:1


NORM:20 kS/s

1

2

3

=Record Length=


CH2 : 0.0 V

Main : 100 K

Zoom : 2 K

Mode : AUTO

Type : EDGE CH1

Delay : 0.0 ns

Hold off : 0.2 µs

CH3 : 0.00 V

CH4 : 0.00 V

BW : FULL


-3 div -1 div 0 div +1 div +3 div

CH Position To

CH2

Position

0.20 div

1 IC1 21

3 IC1 68

4 IC1 17

Vp-p=1.0 V~1.3 V

0.5 mV/div,0.5 µsec/div

5 IC1 4

T

T

TE

DRF

Stopped

CH1=10 V

DC 10:1

CH2=1 V

DC 10:1


NORM:100 kS/s

2

1

=Record Length=


CH2 : 0.00 V

Main : 100 K

Zoom : 2 K

Mode : NORMAL

Type : EDGE CH1

Delay : 2.924 ms

Hold off : 0.2 µs

CH3 : 0.00 V

CH4 : 0.00 V

BW : FULL


3 IC1 68

4 IC1 17

T

T

FDO

SPDO

Stopped

CH1=200 mV

DC 10:1

CH2=500 mV

DC 10:1

500 ms/div

1999/04/07 09:51:15

(500 ms/div)

NORM:20 kS/s

2

1

=Record Length=


CH2 : 0.000 V

Main : 100 K

Zoom : 2 K

Mode : NORMAL

Type : EDGE CH2

Delay : 2.924 ms

Hold off : 0.2 µs

CH3 : 0.00 V

CH4 : 0.00 V

BW : FULL


1 IC1 21

6 IC1 24

T

FDO

PDO2

PDO1

Stopped

CH1=500 mV

DC 10:1

CH3=1 V

DC 10:1

CH4=1 V

DC 10:1


NORM:20 kS/s

1

4

3

=Record Length=


CH2 : 0.0 V

Main : 100 K

Zoom : 2 K

Mode : AUTO

Type : EDGE CH2

Delay : 0.0 ns

Hold off : 0.2 µs

CH3 : 0.00 V

CH4 : 0.00 V

BW : FULL


CH1

v/DIV

500 mV

1999/04/05 17:33:17

1 IC1 21

7 IC1 76

8 IC1 77

T

T

DOUT

Stopped

CH1=2 V

DC 10:1

500 ns/div

1999/04/07 09:25:28

(500 ns/div)

NORM:200 MS/s

1

=Record Length=


CH2 : 0.00 V

Main : 1 K

Zoom : 100

Mode : NORMAL

Type : EDGE CH1

Delay : 2.887 ms

Hold off : 0.2 µs

CH3 : 0.00 V

CH4 : 0.00 V

BW : FULL


9 IC1 39

T

T

DATA

DATACK

LRSY

Stopped

CH1=2 V

DC 10:1

CH2=2 V

DC 10:1

CH3=2 V

DC 10:1

5 µs/div(5 µs/div)

NORM:100 kS/s

1

2

3

=Record Length=


CH2 : 0.00 V

Main : 5 K

Zoom : 100

Mode : AUTO

Type : EDGE CH3

Delay : 0.0 ns

Hold off : 0.2 µs

CH3 : 0.00 V

CH4 : 0.00 V

BW : FULL


CH3

v/DIV

2 V

1999/04/05 20:50:17

10 IC1 57

IC1 58

IC1 59

11

12

CD-ES777

5 – 2

[2] Voltage

PIN PIN VOLTAGE PIN PIN PIN PIN

NO NO NO NO NO NO

1 5.02 51 0 1 0 1 3.2 51 0 1 2.1

2 5.01 52 4.71 2 0 2 1.61 52 0 2 2.2

3 5.01 53 4.64 3 0 3 1.61 53 0 3 2.1

4 5.01 54 4.64 4 4.98 4 1.6 54 0 4 2.2

5 1.81 55 4.61 5 4.95 5 1.61 55 0 5 2.1

6 5.01 56 4.65 6 4.96 6 3.06 56 0 6 2.2

7 5.01 57 N/U 7 4.99 7 1.65 57 0 7 0

8 0 58 N/U 8 4.96 8 1.65 58 0 8 4.37

9 4.92 59 N/U 9 4.96 9 1.65 59 0 9 5.02

10 4.93 60 N/U 10 4.99 10 1.65 60 3.2 10 3.2

11 4.93 61 N/U 11 4.96 11 1.48 61 0 11 1.62

12 0 62 N/U 12 4.96 12 0 62 0 12 1.65

13 4.93 63 N/U 13 4.96 13 1.65 63 0.53 13 1.62

14 0 64 N/U 14 4.96 14 0 64 0 14 1.65

15 0 65 N/U 15 4.96 15 1.65 65 5.18 15 1.62

16 0 66 N/U 16 4.96 16 1.47 66 5.18 16 0

17 2.82 67 N/U 17 4.99 17 1.48 67 4.68 17 1.62

18 4.77 68 -28.55 18 4.96 18 0 68 0 18 1.64

19 0 69 -28.55 19 4.96 19 0 69 0 19 4.71

20 0 70 -28.61 20 4.96 20 0 70 0 20 4.71

21 0 71 -28.64 21 4.96 21 1.6 71 0 21 3.92

22 4.77 72 -28.64 22 4.98 22 0 72 0 22 3.11

23 4.73 73 -17.02 23 9.95 23 1.61 73 0 23 3.1

24 1.8 74 -28.62 24 0 24 1.61 74 4.68 24 2.5

25 4.92 75 -25.59 25 0 75 4.68 25 1.65

26 4.92 76 -17.18 26 0 76 3.01 26 0

27 4.88 77 -25.61 PIN 27 3.2 77 0 27 5.02

28 0 78 -22.64 NO 28 0 78 1.12 28 8.68

29 0 79 4.76 1 58.3 29 3.2 79 0 29 5.02

30 0 80 -28.77 2 24.85 30 0 80 3.2 30 0.69

31 4.92 81 -19.89 3 12.79 31 0 31 0.71

32 4.93 82 -20.07 4 -12.85 32 1.59 32 0

33 4.93 83 -14.14 5 -24.75 33 1.6 PIN VOLTAGE 33 0

34 4.92 84 -25.78 6 -58.9 34 3.2 NO 34 0

35 3.76 85 -25.62 7 0 35 0 1 0 35 2.11

36 4.93 86 -22.96 8 0 36 0 2 0 36 2.2

37 12.78 87 -19.9 9 0 37 0 3 0

38 12.78 88 -20.09 10 0 38 0 4 2

39 12.78 89 -25.63 11 0 39 0 5 2

40 0 90 -23.18 12 -57.4 40 0 6 1.32 PIN VOLTAGE

41 4.78 91 -23.01 13 57.6 41 3.61 7 0 NO

42 4.81 92 -22.79 14 0 42 0 8 0.6 1 2.55

43 4.71 93 -22.82 15 0 43 0 9 3.48 2 2.55

44 0 94 -22.96 16 -56.01 44 1.8 10 3.44 3 2.55

45 4.77 95 -22.76 17 0 45 3.8 11 0 4 0

46 0 96 -22.74 18 0 46 0 12 0 5 2.49

47 0 97 -22.57 47 1.45 13 6.9 6 2.69

48 0 98 -22.55 48 1.49 14 4.18 7 1.34

49 4.76 99 -22.58 PIN 49 3.19 15 0 8 12.66

50 -0.59 100 -22.34 NO 50 3.79 16 3.45

1 5.06 17 0.6

2 12.83 18 0

3 19.6 19 2.59

4 0 20 2

5 18.28 21 2

6 9.92 22 0

7 8.4 23 0

24 0

IC 851

VOLTAGE

IC 503

IC 901

VOLTAGE

IC101

IC2

VOLTAGE VOLTAGE

IC1IC 601

VOLTAGEVOLTAGE

IC701

VOLTAGE

CD-ES777

5 – 3

CD-ES777

6 – 1

CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT

[1] Notes on schematic diagram• Resistor:

To differentiate the units of resistors, such symbol as K and M areused: the symbol K means 1000 ohm and the symbol M means1000 kohm and the resistor without any symbol is ohm-type resis-tor. Besides, the one with “Fusible” is a fuse type.

• Capacitor:To indicate the unit of capacitor, a symbol P is used: this symbol Pmeans pico-farad and the unit of the capacitor without such a sym-bol is microfarad. As to electrolytic capacitor, the expression“capacitance/withstand voltage” is used.(CH), (TH), (RH), (UJ): Temperature compensation(ML): Mylar type(P.P.): Polypropylene type

• Schematic diagram and Wiring Side of P.W.Board for this modelare subject to change for improvement without prior notice.

• The indicated voltage in each section is the one measured by Digi-tal Multimeter between such a section and the chassis with no sig-nal given.

1. In the tuner section, indicates AM indicates FM stereo

2. In the main section, a tape is being played back.

3. In the deck section, a tape is being played back. ( ) indicates the record state.

4. In the power section, a tape is being played back.

5. In the CD section, the CD is stopped.

• Parts marked with “ “ ( ) are important for main-taining the safety of the set. Be sure to replace these parts withspecified ones for maintaining the safety and performance of theset.

[2] Types of transistor and LED

REF. NO DESCRIPTION POSITIONJOG701 VOLUME MAX—MINSW701 POWER ON /STAND-BY ON—OFFSW702 CD ON—OFFSW703 TUNER (BAND) ON—OFFSW704 AUX ON—OFFSW705 TAPE ON—OFFSW707 PLAY ON—OFFSW708 FAST FORWARD/PRESET UP ON—OFFSW709 FAST REWIND/PRESET DOWN ON—OFFSW710 STOP ON—OFFSW711 DISC 1 ON—OFFSW712 DISC 2 ON—OFFSW713 DISC 3 ON—OFF

SW711 DISC 1 ON—OFFSW712 DISC 2 ON—OFFSW713 DISC 3 ON—OFFSW724 DISC 4 ON—OFFSW725 DISC 5 ON—OFFSW726 OPEN/CLOSE ON—OFF

REF. NO DESCRIPTION POSITION

KRA107 SKRC102 SKRC104 SKTA1504 YKTC3875 GR

B(3)

E(1)

C(2)

TOPVIEW

KDS184KDS160

TOP VIEW

TOP VIEW

KTA1271 YKTA1273 YKTA1274 Y

VIEWFRONT

E C B(S)(G)(D)(1)(2)(3) 1N404S

1N4148H

D1SS119

DRL204F

TS10B05G

AC AC

VIEWFRONT

FRONTVIEW

SDPB50CDSLR342VCSDPB40F2

KTC3194 YKTC3199 GRKTC3200 GRKTC3203 YKTC3205 Y

Documents

Sharp CD Es777