SONY 35, CFD V25, KV32 Service Manual

CFD-V25/V35

SERVICE MANUAL

Ver 1.1 2000. 04

With SUPPLEMENT (9-923-315-81)

Photo: CFD-V35

US Model

Canadian Model

CFD-V25/V35

E Model

CFD-V25

Model Name Using Similar Mechanism Optical Pick-up Type KSM-213CDM/C2NP Tape Transport Mechanism Type MF-V10-117

CD Section Tape Section

NEW

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC DISTORTION With 3.2 Ω loads, both channels driven from 150 – 10,000 Hz; rated 2W per channel-minimum RMS power, with no more than 10 % total harmonic distortion in AC operation.

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 – 108 MHz

AM : 530 – 1,710 kHz 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 (excluding US model)

2.3 W + 2.3 W (at 3.2 Ω, 10 % harmonic distortion)

Power requirements For CD radio cassette-corder :

120V AC, 60 Hz 9V DC, 6 size D (R 20) batteries For memory controller : 3V DC, 2 size AA (R 6) batteries

Power consumption AC 20W

— Continued on next page —

MICROFILM

CD RADIO CASSETTE-CORDER

TABLE OF CONTENTS

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

SAFETY CHECK-OUT

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

3. DISASSEMBLY

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

Headphone Board ······························································· 9 3-2. Upper Cabinet····································································· 9 3-3. Optical Pick-up ·································································10 3-4. Mechanism Deck, Rec sw Board, Main Board,

Power Board, Primary Board, Batt Board ························ 10

4. ADJUSTMENTS

4-1. Mechanical Adjustment ····················································11 4-2. Electrical Adjustment ······················································· 11 4-3. Tuner Section···································································· 12 4-4. Reference ·········································································· 15

5. DIAGRAMS

5-1. Circuit Board Location ····················································· 17 5-2. IC Pin Function ································································ 18 5-3. Block Diagram ································································· 20 5-4. Printed Wiring Board························································23 5-5. Schematic Diagram – Tuner/System Section – ················ 27 5-6. Schematic Diagram – Power Section – ····························31 5-7. Schematic Diagram – CD Section – ·································35 5-8. IC Block Diagrams ··························································· 38

6. EXPLODED VIEWS

6-1. Front Cabinet Section ······················································· 39 6-2. Upper Cabinet Section······················································40 6-3. Rear Cabinet Section ························································ 41 6-4. Mechanism Deck Setion (1) (MF-V10-117) ···················· 42 6-5. Mechanism Deck Setion (2) (MF-V10-117) ···················· 43 6-6. Optical Pick-up Section (KSM-213CDM/C2NP) ············44

After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for A C leakage. Check leakage as described below.

LEAKAGE

The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes). Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA WT -540A. F ollow the man ufacturers’ instructions to use these instruments.

2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a VOM or batter y-operated A C voltmeter . The “limit” indication is 0.75 V, so analog meters must have an accura te lo w-voltage scale. The Simpson 250 and Sanwa SH-63T rd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)

T o Exposed Metal

Parts on Set

7. ELECTRICAL PARTS LIST······································· 45

Battery life For CD radio cassette-corder:

FM recording

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

Tape playbac k

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.

Optional accessories

Sony MDR headphones series

0.15

Fig. A. Using an A C v oltmeter to check A C leakage.

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.

ATTENTION AU COMPOSANT AYANT RAPPORT

LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

1.5 k

Ω

Earth Ground

À LA SÉCURITÉ!

Voltmeter (0.75 V)

— 2 —

SECTION 1

Insert a precision screw driver and push SWITCH

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 as following figure.

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

— 3 —

SECTION 3

DISASSEMBLY

• The equipment can be removed using the following procedure.

SET FRONT CABINET CONTROL (1) BOARD

TUNING KNOB UPPER CABINET

PRIMARY BOARD

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

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

Front cabinet

CONTROL (2) BOARD HEADPHONES BOARD

OPTICAL PICK-UP SECTION

MECHANISM DECK

CONTROL (1) board

Screws +BVTP 2.6 × 8

!™

REC SW BOARD

Headphones board

!¡

Screw +BVTP 2.6 × 8

MAIN BOARD POWER BOAR

Rear cabinet

BATT BOARD

TUNING KNOB

Screws

+BVTP 2.6 × 8

3-2. UPPER CABINET

Cabinet (upper) assy

!º

CONTROL (2)

board

STOP/EJECT

Screws

+BVTP 2.6 × 8

Screws

+BVTP 3 × 12

Screws +BVTP 3 × 14

Screws

+BVTP 3 × 12

+BVTP 3 × 1

Handle

Screws

Tape operation button

— 9 —

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, PRIMARY BOARD,

BATT BOARD

PRIMARY board

!™

Screws

+BVTP 3 × 10

Screws +BVTP 3 × 10

REC SW board

!£

Mechanism deck

MAIN board

Screws +BVTP 3 × 1

!º

!¡

BATT board

Rear cabinet

Screws +BVTP 3 × 10

CNP301 (4pin)

POWER board

Screws +BVTP 3 × 10

— 10 —

SECTION 4

Tape speed adjustment control inside motor

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

Tape T ension Measurement

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

6.3kHz, –10dB

set

0.25 V (–10dB)

Tape speed adjustment Head azimuth adjustment.

1dB = 0.775V

HP OUT

32 Ω

Used for

speed checker LFM-30 or digital frequency counter

Ω

+ –

Torque Meter

CQ-403A

Meter Reading

more than 80g

(more than 2.83 oz)

J302 (phones)

Adjustment Value : normal tape speed

Speed checker

–2.0 to 2.0%

Frequency difference between the beginning and the end of the tape should be within 2% (60Hz).

Adjustment Location :

Digital frequency counter

2,940 – 3,060Hz

— 11 —

4-3. TUNER SECTION

• Switch Location

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

Adjust for a maximum reading on level meter.

T2 455kHz

AM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L3 620kHz

CV1 (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

32k

0.01µF

Ω

telescopic antenna terminal

level meter

+ –

AM FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L4 520kHz

CV1 (4/4) 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 86.5MHz

CV1 (1/4) 109.5MHz

FM FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L2 86.5MHz

CV1 (2/4) 109.5MHz

J302 (phones)

Adjustment Location : MAIN board (Component side)

(See page 13)

— 12 —

FM VCO Adjustment

color mark

CF1

Procedure :

FM RF SSG

0.01µF to ANT IN termina

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

1. Connect frequency counter to the positions shown below.

2. Tune the set to 98MHz.

3. Adjust RV1 for 76kHz ± 50Hz reading on the frequency counter.

Frequency counte

0.01µF

IC1 Pin

33k

Ω

–

Adjustment Location : MAIN board (Component side)

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

AM Tracking

CV1 (3/4)

IC701

FM Tracking

CV1 (1/4)

RV1

FM Frequency Coverage Adjustment

CV1 (2/4)

CF1

IC1

4 1

FM IF IN

’‘

T2 : AM IF

ANT IN

AM Frequency Coverage Adjustment

CV1 (4/4)

RV1 : FM VCO

T1 : FM IF

— 13 —

IC1 : VCO IN

CD SECTION

Notes on Check

1. Perform the traverse check in the CD test mode. After check, be sure to exit the test mode.

2. Perform check in the order given.

3. Use the disc (YEDS-18, Parts No. 3-702-101-01) only when so indicated.

Before Check

Put the set into test mode and perform the following checks. Repair if there are any problems.

• Sled Motor Check

Press + , = keys and confirm that the Optical pick-up moves smoothly from the innermost to outermost circumference and back smoothly and with no catching or abnormal noises. (Cancellation of BTL mute)

+ : Optical pick-up moves to the outer circumference. = : Optical pick-up moves to the inner circumference.

E-F Balance Check

Adjustment Location : MAIN board (See page 23)

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

Check Procedure:

1. Connect the oscilloscope to test point TP (VC) and TP (TE) on MAIN board.

2. Put the set into test mode.

3. Optical pick-up setting to the center by + or = button pushing.

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

5. Check that the oscilloscope traverse w aveform is symmetrical, as shown in the figure below.

6. Release test mode after adjustment is completed.

VOLT/DIV : 0.1

TIME/DIV : 1ms

• Focus Search Check

1. Press the CD ^ key. (Focus search operation is performed continuously.)

2. Look at the Optical pick-up objective lens and confirm that it moves up and down smoothly, with no catching or abnormal noises.

3. Press p button. Confirm that focus search operation stops. If it does not, press p button again longer.

How to Enter the Set into Test Mode

1. Turn the AC CORD IN (Adaptor). (LCD 501 indicator blinks the test mode pattern.)

2. Short-circuit between the lands as shown on the control (1) board.

How to Exit the Test Mode

Turn the POWER OFF.

[CONTROL (1) BOARD]

A = B C = 500mV

[MAIN BOARD]

TP(RF)

100mV

TP(FE)

TP(VC)

TP(TE)

Test portion Short : Test mode Open : Normal mode

Jumper wire

— 14 —

TP(TE)

TP(VC)

Osilloscop (DC range)

+ –

Focus Bias Check

(

Adjustment Location : MAIN board (Component side)

(See page 23)

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 MAIN 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 ^ 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 : 500ns

1.2

0.2Vp-p

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

[MAIN BOARD]

4-4. REFERENCE

Focus/Tracking Gain Check

Adjustment Location : MAIN board (Component side)

(See page 23)

A frequency response analyzer is necessary in order to perform this check exactly. However, this gain has a margin, so even if it is slightly off, there is no problem. Focus/Trac king gain determines the pick-up follow-up (vertical and horizontal) relative to mechanical noise and mechanical shock when the 2-axis device operate.

Symptoms

Gain

Focus

• The time until music starts

becomes longer for STOP ➡ CD ^ or automatic selection (0 , ) buttons

low

pressed). (Normally takes about 2 seconds.)

• Music does not start and disc continues to rotate for STOP ➡ CD ^ or automatic

— selection (0 , ) buttons pressed.)

• Sound is interrupted during PLAY. Or time counter

—

display stops progressing.

• More noise during 2-axis device operation.

high

Check Procedure:

1. Keep the set horizontal.

2. Inset disk (YEDS-18) and press ^ button.

3. Connect an oscilloscope to TP (FE) and TP (VC) on the MAIN board.

4. Check that the waveform is as shown in the figure belo w . (Focus waveform)

Tracking

low or high

low

high

TP(RF)

TP(FE)

Osilloscope (DC range)

TP(TE)

–

— 15 —

+ 22 hidden pages