Sony CFD-V37 Service manual

CFD-V37

SERVICE MANUAL

Ver 1.0 1999 . 04

E Model

Model Name Using Similar Mechanism Optical Pick-up Type KSM-213CDM T ape Transport Mechanism T ype MF-V10-117

CD Section Tape Section

CFD-V34

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 + 1/-2 dB Wow and flutter Below measurable limit

Radio section

Frequency range FM : 87.6 – 107 MHz(E4,EA)

87.6 – 108 MHz(E92)

AM : 530 – 1,605 MHz(E4,EA)

530 – 1,710 MHz(E92)

IF FM : 10.7MHz

AM : 455kHz Aerials FM : Telescopic aerial

AM : Built-in ferrite bar aerial

Cassette-corder section

Recording system 4 -track 2 channel stereo Fast winding time Approx. 120 s (sec.) with Sony cassette

C-60

Frequency response TYPE1 (normal) : 70 – 10,000 Hz

General

Speakers Full range : 10 cm dia., 3.2 Ω, cone type

(2)

Outputs Headphones jack (stereo minijack)

For 16 – 64 Ω impedance headphones

Power output 2.5 W + 2.5 W (at 3.2 Ω, 10 % harmonic

distortion)

Power requirements For CD radio cassette-corder :

110 – 120 V, 220 – 240 V AC Selectable, 50/60 Hz(E4,EA) 120V 60 Hz(E92) 9V DC, 6 size D (R 20) batteries For memory controller : 3V DC, 2 size AA (R 6) batteries

— Continued on next page —

MICROFILM

CD RADIO CASSETTE-CORDER

Power consumption AC 20W Battery life For CD radio cassette-corder:

FM recording

Sony R20P : approx. 13.5 h Sony alkaline LR20 : approx. 19 h

Tape playback

Sony R20P : approx. 7.5 h Sony alkaline LR20 : approx. 15 h

CD playback

Sony R20P : approx. 2.5 h Sony alkaline LR20 : approx. 6 h

Dimensions Approx. 425 × 160 × 246 mm (w/h/d)

(16 3/4 × 6 3/8 × 9 3/4 inches) (incl. projecting

parts) Mass Approx. 4.2 kg (9 lb. 4 oz) (incl. batteries) Supplied accessories AC power cord (1)

Remote controller (1)

Design and specifications are subject to change without notice.

E4 : 220V – 240V AC area EA : Saudi Arabia E92 : 120V AV area

TABLE OF CONTENTS

1. SERVICE NOTES ····························································3

2. GENERAL ·········································································· 4

3. DISASSEMBLY

3-1. Front Cabinet, Control (1) Board, Control (2) Board,

Headphone Board ······························································· 5 3-2. Upper Cabinet····································································· 5 3-3. Optical Pick-up··································································· 6 3-4. Mechanism Deck, Rec sw Board, Main Board,

Power Board, Batt Board, Primary Board ·························· 6

4. ADJUSTMENTS

4-1. Mechanical Adjustment ······················································ 7 4-2. Electrical Adjustment ························································· 7 4-3. Tuner Section······································································ 8 4-4. Reference·········································································· 11

5. DIAGRAMS

5-1. Circuit Board Location ····················································· 13 5-2. IC Pin Function ································································ 14 5-3. Block Diagram ································································· 16 5-4. Printed Wiring Board························································ 19 5-5. Schematic Diagram – Tuner/System Section – ················ 23 5-6. Schematic Diagram – Power Section – ····························27 5-7. Schematic Diagram – CD Section –································· 31 5-8. IC Block Diagrams ··························································· 34

6. EXPLODED VIEWS

6-1. Front Cabinet Section ······················································· 35 6-2. Upper Cabinet Section······················································ 36 6-3. Rear Cabinet Section ························································ 37 6-4. Mechanism Deck Setion (1) (MF-V10-117) ···················· 38 6-5. Mechanism Deck Setion (2) (MF-V10-117) ···················· 39 6-6. Optical Pick-up Section (KSM-213CDM) ······················· 40

7. ELECTRICAL PARTS LIST ·······································41

— 2 —

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE WITH MARK ! 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.

SECTION 1

Insert a precision screw driver and push SWITCH(S501)

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(S501) 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 OF CONTROLS

SECTION 2

GENERAL

54321

!• !¶ !§ !∞ !¢ !£ !™ !¡ !º 8

1 POWER button 2 Tape operating buttons 3 FUNCTION buttons 4 LOOP button 5 OPEN/CLOSE button 6 Remote sensor 7 OPR/BATT indicator 8 TUNING knob 9 Information display

!º TONE (H) button !¡ CD operating !™ TONE (L) button !£ 2 !¢ DISPLAY/ENTER button !∞ VOLUME – button !§ PLAY MODE button !¶ MEGA BASS button !• VOLUME + button

Remote commander

!¡

!º 9

1 POWER (AC ONLY) button 2 Number buttons 3 VOL +/– buttons 4 CD operation buttons 5 CD button 6 TAPE button 7 LOOP button 8 BAND select buttons 9 TONE H/L buttons !º MODE button !¡ MEGA BASS button

— 4 —

SECTION 3

DISASSEMBLY

• The equipment can be removed using the following procedure.

Set Front cabinet Control (1) board

Control (2) board Upper cabinet

Primary board

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

3-1. FRONT CABINET, CONTROL (1) BOARD, CONTROL (2) BOARD, HEADPHONE BOARD

Headphone board

Optical pick-up Mechanism deck

Front cabinet

Main board

REC SW board

CONTROL (1) board

Five screws +BVTP 2.6 × 8

!£

Headphone board

!™

Screw +BVTP 2.6 × 8

BATT board Power board

Rear cabinet

T uning knob

T wo screws

+BVTP 2.6

3-2. UPPER CABINET

!¡

CONTROL (2)

board

+BVTP 2.6

Upper cabinet

STOP/EJECT

Seven screws

T wo screws

+BVTP 3 × 12

Four screws

+BVTP 3

Four screws +BVTP 3 × 14

Three screws

+BVTP 3 × 12

Handle

Tape operation button

— 5 —

Rear cabinet

3-3. OPTICAL PICK-UP

Remove solder

CD Motor board

Optical pick-up section

Wire (Flat type) (16 core)

to MAIN board (CNP701)

CNP702 (6pin)

3-4. MECHANISM DECK, REC SW BOARD, MAIN BOARD, POWER BOARD, BATT BOARD,

PRIMARY BOARD

!¢

PRIMARY board

!£

Three screws

+BVTP 3 × 10

Mechanism deck

Two screws +BVTP 3 × 10

REC SW board

MAIN board

Three screws +BVTP 3 × 10

!¡

!™

BATT board

Rear cabinet

Three screws +BVTP 3 × 1

CNP301 (4pin)

Chassis (PWB)

POWER board

Three screws +BVTP 3 × 10

— 6 —

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.)

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, apply suitable locking compound to the parts adjusted.

Torque Measurement

Mode

FWD

FWD back tension

Fast Forward

Rewind

Torque Meter

CQ-102C

CQ-201B

Meter Reading

60g•cm

(0.42 – 0. 83 oz•inch)

1 – 5g•cm

(0.014 – 0.07 oz•inch)

more than 55g•cm

(more than 0.77 oz•inch)

more than 55g•cm

(more than 0.77 oz•inch)

4-2. ELECTRICAL ADJUSTMENT

TAPE RECODER SECTION

Standard output level

Output Pin

Load impedance Output signal level

Test tape

Test Tape

WS-48A

P-4-A063

Tape Speed Adjustment

Procedure :

Mode : Playback

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

Signal

3kHz, 0dB

6.3 kHz, –10 dB

set

0.25 V (–10dB)

Tape speed adjustment Head azimuth adjustment

Ω

0dB = 0.775V

HP OUT

32 Ω

Used for

digital frequency counter

+ –

T ape Tension Measurement

Torque Meter

CQ-403A

Meter Reading

more than 80g

(more than 2.83 oz)

J302 (phones)

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

Specification V alue :

Digital frequency counter

2,910 – 3,090Hz

Frequency difference between the beginning and the end of the tape should be within 3% (90 Hz).

Adjustment Location :

— 7 —

Tape speed adjustment control inside motor

4-3. TUNER SECTION

• Switch Location

VOLUME : MAX MEGA BASS : OFF TONE : OFF

AM SECTION

BAND : AM Signal generator

AM RF signal generator

Put the lead-wire antenna close to the set.

0 dB = 1 µV

• 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 455kHz

AM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L3 620kHz

CT1 (3/4) 1,400kHz

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

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

Ω

telescopic antenna input (ANT1)

level meter

+ –

AM FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L4 516kHz(520kHz)

CT1 (4/4) 1,630kHz(1,780kHz)

FM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T1 10.7MHz

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L1 87.35MHz(86.5MHz)

CT1 (1/4) 107.8MHz(109.5MHz)

FM FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L2 87.35MHz(86.5MHz)

CT1 (2/4) 107.8MHz(109.5MHz)

( ) : E92 model

J302 (phones)

Adjustment Location : MAIN board (Component side)

(See page 9)

— 8 —

FM VCO Adjustment

color mark

CF1

Procedure :

FM RF SSG

0.01µF telescpic

antenna

Carrier frequency : 98MHz IF frequency : According to the color of CF1. Modulation : no modulation Output level : 0.1V (100dB)

input(ANT1)

1. Connect frequency counter to the positions shown below.

2. Tune the set to 98MHz.

3. Adjust the RV1, so that the frequenc y counter reading becomes 76,000Hz.

Specification V alue :

Digital frequency counter 75,950 – 76,050 Hz

Frequency counte

IC1 Pin

0.01µF

33k

Ω

+ –

Adjustment Location : MAIN board (Component side)

BLACK 10.64MHz BLUE 10.67MHz RED 10.70MHz ORANGE 10.73MHz WHITE 10.76MHz

AM T rac king Adjustment

CT1 (3/4)

IC701

FM T rac king Adjustment

CT1 (1/4)

RV1

FM Frequency Coverage Adjustment

IC1

4 1

CT1 (2/4)

CF1

16 18

T2 : AM IF Adjustment

ANT 1

CT1 (4/4)

AM Frequency Coverage Adjustment

RV1 : FM VCO

Adjustment

T1 : FM IF

Adjustment

— 9 —

IC1 : VCO Frequency counter

+ 21 hidden pages