Sony CFDG-30-L, CFDG-50-L Service manual

CFD-G30L/G50L

SERVICE MANUAL

Ver 1.1 2001.04

PHOTO : CFD-G50L

CD Section

Tape deck Model Name Using Similar Mechanism CFD-V27L Section T ape Transport Mechanism T ype MF-V5-117

AEP Model

UK Model

Singapore Model

CFD-G30L/G50L

Australian Model

CFD-G30L

Argentina Model

CFD-G50L

Model Name Using Similar Mechanism CFD-V27L CD Mechanism Type KSM-213CDP Optical Pick-up Name KSS-213C

SPECIFICATIONS

CD player section

System Compact disc digital audio system Laser diode properties Material: GaAlAs

Wavelength:780 nm Emission duration : Continuous Laser output : Less than 44.6 µW (This output is the value measured at a distance of

about 200 mm from the objective lens surface on

the optical pick-up block with 7 mm aperture.) Spindle speed 200 r/min (rpm) to 500 r/min (rpm) (CLV) Number of channels 2 Frequency response 20 – 20,000 Hz + 0.5/-1.5 dB Wow and flutter Below measurable limit

Radio section

Frequency range FM : 87.5 – 108 MHz

MW : 531 – 1,602 kHz LW : 153 – 279 kHz

IF FM : 10.7 MHz

MW/LW : 450 kHz

Aerials FM : Telescopic aerial

MW/LW : Built-in ferrite bar aerial

Cassette-corder section

Recording system 4 -track 2 channel stereo Fast winding time Approx. 110 sec. with Sony cassette C-60 Frequency response TYPE I (normal) : 70 – 13,000 Hz

General

Speaker Full range : 10 cm (4 in.) dia., 3.2 Ω, cone type (2)

W oofer : 8 cm (3 1/4 in.) dia., 4 Ω, cone type (1) Inputs LINE IN (stereo minijack) : Sensetivity 436 mV Outputs Headphones jack (stereo minijack)

For 16 – 68 Ω impedance headphones Maximum power output Full range : 4 W + 4 W

Woofer : 12W

Power requirements For CD radio cassette-corder :

230V AC, 50 Hz 12V DC, 8 size D (R 20) batteries For remote contorol (CFD-G50L only):

3V DC, 2 size AA (R6) batteries Power consumption AC 30W Battery life For CD radio cassette-corder:

FM recording

Sony R20P : approx. 8 h

Sony alkaline LR20 : approx. 18 h

Tape playback

Sony R20P : approx. 1.5 h

Sony alkaline LR20 : approx. 6 h

CD playback

Sony R20P : approx. 1 h

Sony alkaline LR20 : approx. 4 h

Dimensions Approx. 500 × 206 × 328 mm (w/h/d)

(19 3/4 × 8 1/8 × 13 inches) (incl. projecting

parts) Mass Approx. 7 kg (15 lb. 7 oz) (incl. batteries) Supplied accessories Mains lead (1)

Remote control (1) (CFD-G50L only)

Design and specifications are subject to change without notice.

CD RADIO CASSETTE-CORDER

9-927-696-12

Sony Corporation

Personal Audio Company Shinagawa Tec Service Manual Production Group

3-1. Front Cabinet Assy ····························································· 5 3-2. Control-1, Headphone Board ············································· 6 3-3. Cabinet (Upper) Assy ························································· 6 3-4. Power, Batt, Tuner, Batt Com Board ·································· 7 3-5. Main, Line In, LCD Board ················································· 7 3-6. CD Board, Optical Pick-up Section,

Mechanism Deck ································································ 8

3-7. Belt ····················································································· 8

4. ADJUSTMENT

4-1. Mechanical Adjustment ······················································ 9 4-2. Electrical Adjustment ························································· 9

5. DIAGRAM

5-1. Circuit Boards Location ··················································· 12 5-2. Block Diagrams – Tuner/CD Section –···························· 13

– Main Section –······························································· 15 5-3. Schematic Diagram – CD Section –································· 18 5-4. Printed Wiring Board – CD Section – ······························ 21 5-5. Schematic Diagram – Cassette Deck Section –················ 23 5-6. Printed Wiring Board – Cassette Deck Section –············· 25 5-7. Schematic Diagram – Tuner Section – ····························· 27 5-8. Printed Wiring Board – Tuner Section – ·························· 29 5-9. Printed Wiring Board – Main Section – ··························· 31 5-10. Schematic Diagram – Main Section (1/2) – ····················· 33 5-11. Schematic Diagram – Main Section (2/2) –····················· 35 5-12. Printed Wiring Board and Schematic Diagram

– Control Section –·························································· 37 5-13. Schematic Diagram – Power Section – ···························· 39 5-14. Printed Wiring Board – Power Section – ························· 41 5-15. IC Pin Function Description············································· 43 5-16. IC Block Diagrams ··························································· 45

6. EXPLODED VIEWS

6-1. Front Cabinet Section ······················································· 49 6-2. Rear Cabinet Section ························································ 50 6-3. Upper Cabinet Section······················································ 51 6-4. Mechanism Deck Section (1) (MF-V5-117) ···················· 52 6-5. Mechanism Deck Section (2) (MF-V5-117) ···················· 53 6-6. Optical Pick-up Section (KSM-213CDP) ························ 54

7. ELECTRICAL PARTS LIST ··································· 55

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety checks before releasing the set to the customer.

1. Check the area of your repair for unsoldered or poorly-soldered

connections. Check the entire board surface for solder splashes and bridges.

2. Check the interboard wiring to ensure that no wires are

"pinched" or contact high-wattage resistors.

3. Look for unauthorized replacement parts, particularly

transistors, that were installed during a previous repair . Point them out to the customer and recommend their replacement.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

4. Look for parts which, through functioning, show obvious signs of deterioration. Point them out to the customer and recommend their replacement.

5. Check the B+ voltage to see it is at the values specified.

6. 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.

— 2 —

SECTION 1

Insert a precision screw driver and push SWITCH (S701)

SERVICE NOTES

Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.

The following caution label is located inside the unit.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc., on clothing and the human body. During repair, pay attention to electrostatic breakdown and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

CHUCK PLATE JIG ON REPAIRING

On repairing CD section, playing a disc without the CD lid, use Chuck Plate Jig.

• Code number of Chuck Plate Jig : X-4918-255-1

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

1. Press CD open knob.

2. Open the lid for CD.

3. Push on SWITCH (S701) as following figure.

4. Confirm the laser diode emission while observing the objecting lens. When there is no emission, Auto Po wer Control circuit or Optical Pick-up is broken. Objective lens moves up and down once for the focus search.

— 3 —

LOCATION AND FUNCTION OF CONTROLS

SECTION 2

GENERAL

,wf,wg,wh

wd

qlqkqj w;

qh qg qf qd

1 CD Z PUSH OPEN/CLOSE button 2 CD LID 3 CD u button 4 VOLUME + button 5 VOLUME − button 6 CD x button 7 Speaker 8 LINE button 9 SOUND button 0 POWER DRIVE WOOFER button qa PLAY MODE (MONO/ST) button qs i Phone jack qd DISPLAY ENT MEMORY button qf SLEEP button qg POWER button

wa

3ws

1,2

8qs 0 9qa

qh Tape operation buttons

z button

N button m button M button

x, Z button

X button

qj CASSETTE LID qk PRESET − button ql RADIO BAND AUTO PRESET button w; PRESET + button wa TUNE ., > buttons ws Information display OPR/BATT indicator wd AC IN jack wf FM rod antenna wg Battery compartment wh LINE IN jack

4 5 6 7

— 4 —

SECTION 3

DISASSEMBLY

• The equipment can be removed using the following procedure.

Cabinet (front) sub assySet

Cabinet (upper) assy Control-1, Headphone board

Note : Follow the disassembly procedure in the numerical order given.

3-1. FRONT CABINET ASSY

qa Cabinet (front) sub assy

9 Flexible

0 Connector

8 Screw

+BVTP 3 × 10

Power, Batt, Tuner, batt com board

Main, LIine in, Lcd board CD board,

Optical pick-up section, Mechanism deck, belt

6 Remove the Handle in the direction of the arrow.

7 Open the Lid (CD) in the direction of the arrow.

2 Five screws +BVTP 3 × 12

4 Screw +BVTP 3 × 16

3 Three screws +BVTP 3 × 12

5 Screw +BVTP 3 × 16

1 Lid, battery case

— 5 —

3-2. CONTROL-1, HEADPHONE BOARD

8

4 HEADPHONE board

3-3. CABINET (UPPER) ASSY

2 Open the cassette the holder assy by pressing STOP/EJECT button.

3 Screw +BVTP 3 × 10 BZN

6 T wo screws +BVTP 3 × 10 CZN

5 T wo connectors

2 CONTROL-1 board

1 Four screws

+BVTP 3 × 10 BZN

3 Screw +PWH 2.6 × 10

1 T en screws +BVTP 2.6 ×

4 Open the CD lid in the direction of the arrow.

0 Cabinet (upper) assy

STOP/EJECT

button

7 Connector

5 Screw

+BVTP 3 × 10 BZN

qa Open the Handle in the direction of the arrow.

9

8 Connector

— 6 —

3-4. POWER, BATT, TUNER, BATT COM BOARD

8 Power board

1 Screw

+BVTP 3 × 12

6 T wo screws +BVTP 3 × 16

5 T wo screws +BVTP 3 × 10

7 Connector

2 T wo screws

+BVTP 3 × 12

3 T wo screws +BVTP 3 × 12

0 BATT board

9 Screw +WH 3 × 8

4 Chassis (TRANS)

qh Connector

qg Screw

+WH 3 × 8

qj BATT COM board

qd T wo screws

+BVTP 3 × 10

3-5. MAIN, LINE IN, LCD BOARD

1 Three screws +BVTP 3 × 12

6 Connector

0 Main board

qf TUNER board

5 Flexible

qs Chassis (TU)

qa Three screws

+BVTP 3 × 10

qa Screw +BVTP 3 × 12

qs LINE IN board

2 T wo screws

+BVTP 3 × 12

4 Flexible

8 Connector

3

7 Connector

9 Flexible

qd T wo screws

+BVTP 3 × 10

qf LCD board

— 7 —

3-6. CD BOARD, OPTICAL PICK-UP SECTION, MECHANISM DECK

t

1 Remove solder

2 Screw

3 CD board

+P 2 × 6

4 T wo screws +PWH 2.6 × 10

6 Optical pick-up section

5 T wo screws

+PWH 2.6 × 10

7 Three screws +BVTP 3 × 10

8 Mechanism deck section

3-7. BELT

Flywheel assy

Bel

Motor assy

— 8 —

SECTION 4

ADJUSTMENTS

4-1. MECHANICAL ADJUSTMENT

PRECAUTION

1. Clean the following parts with a denatured-alchool-moistened swab:

record/playback head pinch roller erase head rubber belts capstans

2. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head demagnetizer close to the erase head.)

Torque Measurement

Mode

FWD

FWD back tension

Fast Forward

Rewind

T ape Tension Measurement

Torque Meter

CQ-403A

Torque Meter

CQ-102C

CQ-201B

Meter Reading

18 – 60 g•cm

(0.25 – 0.83 oz•inch)

1.0 – 5.0 g•cm

(0.014 – 0.069 oz•inch)

45 – 95 g•cm

(0.62 – 1.32 oz•inch)

45 – 95 g•cm

(0.62 – 1.32 oz•inch)

Meter Reading

more than 60 g

(more than 2.12 oz)

4-2. ELECTRICAL ADJUSTMENT

0dB = 0.775V

TAPE RECODER SECTION

Standard output level

Output

Load impedance Output signal level

Test tape

Test T ape

WS-48A

Tape Speed Adjustment

Procedure :

Mode : Playback

test tape WS-48A (3kHz, 0dB)

Adjustment V alue : normal tape speed Adjust the tape speed adjustment control inside motor, so that the frequency counter reading becomes 3,000 Hz.

Signal

3 kHz, 0 dB

set

Tape speed adjustment

J391 (phones)

HP OUT

32 Ω

0.25 V (–10 dB)

Used for

digital frequency counter

32 Ω

+ –

Specification V alue :

Digital frequency counter

2,940 – 3,060Hz

Frequency difference between the beginning and the end of the tape should be within 1.5% (45 Hz).

Adjustment Location :

— 9 —

Tape speed adjustment control inside motor

TUNER SECTION

c

r

• Switch Location

VOLUME : MAX MEGA BASS : OFF PRESET SOUND MODE : OFF

MW/LW SECTION

BAND : MW/LW Signal generator

MW/LW RF signal generator

30% amplitude modulation by 400Hz signal. Output level : as low as possible

0 dB = 1 µV

Put the lead-wire antenna close to the set.

• Repeat the procedures in each adjustment several times for the maximum level meter indication.

• The frequency coverage and tracking adjustments should be finally done by the trimmer capacitors.

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T2 450 kHz

MW TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L3-1 621 kHz CT3 1,404 kHz

LW FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L4 279 kHz

FM SECTION

BAND : FM Signal generator

FM RF signal generator

75kHz (100%) amplitude modulation by 1kHz signal. Output level : as low as possible

set

0.01µF

32Ω

J391 (phones)

telescopi antenna terminal

level mete

+

–

L W TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L3-2 162 kHz CT5 261 kHz

FM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T1 10.7 MHz

FM FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L2 108 MHz

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L1 87.5 MHz

CT1 108 MHz

[Adjustment Location : Main board] (Component side)

L2 FM FREQUENCY COVER.

L4 LW FREQUENCY COVER. Adjustment

Adjustment

T2 AM IF Adjustment

T1 FM IF Adjustment

CT5 L3-2

LW TRA CKING Adjustment

CT3 L3-1

MW TRACKING Adjustment

CT1 L1

FM TRACKING Adjustment

— 10 —

SECTION 5

s

DIAGRAMS

CD SECTION

Focus Bias Check

This check is to be done when the optical block replaced.

Check Procedure:

1. Connect the oscilloscope to test point TP (VC) and TP (RF) on CD board.

2. Put the set into test mode.

3. Opitical pick-up setting to the center by + or – button pushing.

4. Insert disk (YEDS-18) and press u button.

5. Press the MODE button. (Tracking servo ON)

6. Check that the oscilloscope wavewform is as sho wn in the figure below (eye pattern). A good eye pattern means that the diamond shape (◊) in the center of the waveform can be clearly distinguished.

7. Release test mode after adjustment is completed.

• RF signal reference waveform (eye pattern)

VOLT/DIV : 0.2V TIME/DIV : 500n

0.9Vp-p – 1.3Vp-p

5-1. CIRCUIT BOARDS LOCATION

BATT board

POWER board

BATT COM board

CONTROL-2 board

HEADPHONE board

CONTROL-1 board

When observing the eye pattern, set the oscilloscope for AC range and raise vertical sensivity.

[Adjustment Location : CD board] (Conductor side)

Oscilloscope

TP

(RF)

TP(VC)

(DC range)

+

–

LCD board

CONTROL-3 board

PRE board

TUNER board

MAIN board

LINE IN board

CD board

— 11 — — 12 —

CFD-G30L/G50L

5-2. BLOCK DIA GRAMS – TUNER/CD SECTION –

ANT1

FM

TELESCOPIC

ANTENNA

LW

F-COVER.

TUNER BOARD

L4

RADIO 6V

Q44

LW

FM TRACKING

RADIO 6V

L1

D1

CT1

MW TRACKING

D3

CT5 -1

Q43 LW

L3-2,CT5

LW TRACKING

L3-1,CT3

CT3

Q41 MW

MW/LW SWITCH

Q14

RADIO 6V

L2

D2

FM

F-COVER.

L3

FERRITE-ROD

ANTENNA

RADIO 6V

AM IF

IFOUT

10

QUAD

FM

DET

AM

DET

AM HCUT

Q12

T2

23 5

VCC1 VCC2

FM/AM

BUFFER

MPX

16

FM

15

MPX

MUTE

12

R-CH

11

L-CH

MAIN

A

SECTION

MAIN BOARD (1/2)

MASTER CONTROL

RADIO

MUTE Q510

3

14

16

15

17

IC501(1/2)

MUTE

R COUNT

R DATA

R CLOCK

R LATCH

FRONT-END

IF AMP,DET,FM MPX

IC1

T1

FM

IF

VDD

FM

AM

XO

XI

MW/LW

LP OUT

LP IN

PD

CF2

CF4

PLL IC2

MO/ST

13

ST IND

BAND

IF IN

10

DO

DI

CL

CE

FM IF

7

AM IF

6

IF

BUFFER

MO/ST

ST IND

BAND

14

18

13

8

7

9

4

2

3

1

18

MIX OUT

FM RF I

2

FM RF O

24

FM OSC

21

AM RF

22

Q42 MW

-2

AM OSC

20

FM

MIX

FM

OSC

AM

MIX

AM

OSC

VT

LPF

OSC

4

6V

14

19

VT

X1

75kHz

Q61

REG

12

11

20

19

6

18

17

16

• RCH is omitted

• Signal Path

: FM

: CD

OPTICAL PICK-UP

BLOCK

(KSS-213C)

VC

A

B

C

D

E

F

LD

GND

PD

VR

F+

FOCUS

COIL

F-

COIL

T+

T-

TRACKING

16

M701 SLED

MOTOR

M702

SPINDLE

MOTOR

M

CD BOARD

D VDD

Q701

LD

DRIVE

RF AMP

IC701

10

VC

4

PD1

5

PD2

8

E

7

F

2

LD ON

LD

AGC CONT

3

PD

MOTOR/COIL DRIVE

IC703

17

F+

18

F-

13

T+

14

T-

12

SL+

11

SL-

15

SP+

16

SP-

RFO

RFI

FFDR

FRDR

TFDR

TRDR

SRDR

SFDR

SP IN

MUTE

DIGITAL SERVO

DIGITAL SIGNAL PROC.

D/A CONV.

IC702

15

16

13FE

11TE

19

Q702

18

24

23

2

3

6

5

25

20

51

43

39

41

40

14

32

33

30

31

29

28

26

RFAC

RFDC

FE

TE

SE

XLON

FFDR

FRDR

TFDR

TRDR

SRDR

SFDR

MDP

L OUT

DATA

CLK

XLAT

SQCK

SCLK

SCOR

SQSO

SENS

SSTP

XRST

72

R-CH

75R OUT

5

7

6

2

9

20

1

8

27

66XTAI

X101

16.9344MHz

67XTAO

3

L OUT

S702 LIMIT IN SW

MAIN

B

SECTION

12

C DATA

10

C CLOCK

11

C LATCH

7

C SQCK

5

C SCLK

1

C SCOR

8

C SQSO

6

C SENS

S701

(CD DOOR)

9

C XRST

13

C AGC CONT

C DOOR

80

— 13 — — 14 —

CFD-G30L/G50L

– MAIN SECTION –

LINE IN BOARD

J301

LINE

IN

HEAD

L OUT

B

L-CH

A

L-CH

R-CH

M321

(LOADING)

S322

(MOTOR SW)

S321

(PLAY SW)

M

TUNER/CD

SECTION

TUNER/CD

SECTION

HRP301 REC/PB

HE301 ERASE

R-CH

PRE AMP

BOARD

R-CH

RADIO 6V

D VDD

MOTOR SW B+

X502

153kHz

X501

4MHz

T301

REC

PB

73

74

32

31

S301

REC

SWITCH

Q513,514

SWITCH

Q511,512

TX

TEX

XTAL

EXTAL

Q301 BIAS

OSC

24

22

5

4

L IN

RADIO

AUDIO 6V

COM3.3V

79

TC PLAY

TAPE

PB AMP

REC TAPE

REF

6

71

CD

WAVEFORMS

1

IC2 w;

MAIN BOARD(2/2)

13.3us

PRE AMP

IC301

BUFFER

AMP

REC AMP

26dB

1521

D501

D502

REC

69

TAPE

23

70

RADIO

LINE

7dB

L

20

17

Q515

EEP ROM

IC504

65

24

SCL77SDA

25

KEY1

SOUND/VOLUME

IC321

13

S IN

14

S IN

9

IN

DATA

1

30CE2

20

19

V DATA

IC501(2/2)

SYSTEM CONTROL

KEY2

26

S OUT

L OUT

CLK

18

V LATCH

V CLOCK

HEADPHONE BOARD

12

BASS AGC Q326,327

WOOFER

POWER AMP

12

13

10

11

COM3COM0

4138

POWER AMP

IC324

STBY

VCC

SWITCH

Q518,519

IC323

STBY

8

VDD(S.W)

3

5

8

28

LIGHT CONT

21

Q322

22

P CON

3

AUDIO 6V

65VM30

REG CHK

VDD(S.W)

RESET

INIT

VDD(S.W)

R VT

31

J391

SP391

L

SP392

R

SP393

WOOFER

BATTRY

CHECK

Q503,504

IC503

RESET

SPEAKER

D955

D951

D322

RMC REG

Q509

• RCH is omitted

• Signal Path

: FM

: CD

: PB

: REC

POWER AMP B+

IC502

3.3V REG

23

9V REG

Q954

Q951

D503

BATT COM

BOARD

RECT

D901-904

POWER BOARD

T901

BATT

BOARD

POWER

BATT

1.5x8=12V

J901

~AC IN

3.3V REG Q956

µ COM(VDD)

21

D507

D508

6V REG

Q955

D952 D958

POWER SWITCH

Q952

Q953

G50L MODEL

R-CH

MOTOR SW B+

AUDIO +6V

COM +3.3V

IC651

2RMC

29MODE CHK

62

MODE CHECK

Q507

AC/DC

DISTINCTION

Q505,506

D512

REMOTE

CONTROL

LCD BOARD

(2/2)

21

5

MUTE

Q122

L.P.F

IC322

2157

MUTE Q321

Q328Q329

WOOFER

GAIN CONT

Q517

WOOFER

GAIN CONT

Q516

LED

DRIVE

Q601

D601

D603,604

CONTROL-1 (1/2)

BOARD

76

64

A MUTE

WOOFER 163WOOFER 2

KEY3

27

SEG17SEG0 4942

2

3

4

5

6

IC501 ea

IC501 uf

T301

IC702 ta

IC702 yj

250ns

6.5us

18.0us

59ns

1.5Vp-p

500mV/div 10µsec/div

3.6Vp-p

1V/div 100nsec/div

2.0Vp-p

500mV/div 5µsec/div

32.0Vp-p

1V/div 10µsec/div

1.1Vp-p

400ns/div 200mV/div

4.0Vp-p

1V/div 20nsec/div

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• b : Pattern from the side which enables seeing.

Note on Schematic Diagrams:

• All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.

• All resistors are in Ω and 1/ specified.

f

•

: internal component.

4

W or less unless otherwise

• 2 : nonflammable resistor.

• C : panel designation.

• H : adjustment for repair.

• U : B+ Line.

• Power voltage is dc 12 V and fed with regulated dc po wer

supply from battery terminal.

• Voltages and wavefor ms are dc with respect to ground under no-signal (detuned) conditions.

Note : The components identified by mark 0 or dotted

line with mark 0 are critical for safety. Replace only with part number specified.

– For Radio, TAPE section MAIN (1/2) –

no mark : PLAY (TAPE SECTION)

TAPE STOP ( ) : REC (TAPE SECTION) [ ] : FM (RADIO SECTION) < > : AM (RADIO SECTION)

– For CD Section MAIN (2/2) –

no mark : CD PLAY

CD STOP

• Voltages are taken with a VOM (Input impedance 10 MΩ). Voltage variations may be noted due to normal production tolerances.

• Signal path.

F : FM f : MW/LW E : PB a : REC J : CD

16

FUNCTION

SWITCH

S631,632

CONTROL-3

BOARD

FUNCTION

SWITCH

S621-623

CONTROL-2

BOARD

FUNCTION

SWITCH

FUNCTION

SWITCH

S603-607

CONTROL-1 BOARD(2/2)

FUNCTION

SWITCH

S608-611S601,602

LCD651

LIQUID CRYSTAL

DISPLAY PANEL

D651

(OPR/BATT)

LCD BOARD(1/2)

— 15 — — 16 — — 17 —

CFD-G30L/G50L

○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○

5-3. SCHEMATIC DIAGRAM – CD SECTION –

• Refer to page 17 for Note on Schematic Diagrams. • Refer to page 17 for Waveforms. • Refer to page 45, 46 for IC Block Diagrams.

(Page 35)

L704

L701

The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.

L709

TP

(RF)

L708

JC

L710

JC

— 18 — — 19 — — 20 —

Sony CFDG-30-L, CFDG-50-L Service manual

TABLE OF CONTENTS

SERVICE NOTES

GENERAL

DISASSEMBLY

3-1. FRONT CABINET ASSY

3-2. CONTROL-1, HEADPHONE BOARD

3-3. CABINET (UPPER) ASSY

3-4. POWER, BATT, TUNER, BATT COM BOARD

3-5. MAIN, LINE IN, LCD BOARD

3-6. CD BOARD, OPTICAL PICK-UP SECTION, MECHANISM DECK

3-7. BELT

ADJUSTMENTS

4-1. MECHANICAL ADJUSTMENT

4-2. ELECTRICAL ADJUSTMENT

DIAGRAMS

5-1. CIRCUIT BOARDS LOCATION

5-2. BLOCK DIA GRAMS – TUNER/CD SECTION –

5-3. SCHEMATIC DIAGRAM – CD SECTION –