Sony CFDV-27 Service manual

CFD-V27

SERVICE MANUAL

Ver 1.1 2000. 08

With SUPPLEMENT-1 (9-926-997-81)

CD Section

Tape deck Model Name Using Similar Mechanism CFD-V17 Section Tape Transport Mechanism Type MF-V10-117

E Model

Model Name Using Similar Mechanism CFD-V17 CD Mechanism Type KSM-213CDM Optical Pick-up Name KSS-213CDM

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 – 108 MHz

AM : 530 –1,710 kHz Aerials FM : Telescopic antenna

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 TYPE I (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 – 68 Ω impedance headphones Power output 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 Power consumption AC 20W Battery life For CD radio cassette-corder:

FM recording

Sony R20P : approx. 13.5 h

Sony alkaline LR20 : approx. 20 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. 7 h

Dimensions Approx. 420 × 165 × 256 mm (w/h/d)

(16 5/8 × 6 1/2 × 10 1/8 inches) (incl. projecting

parts) Mass Approx. 4.1 kg (9 lb. 1 oz) (incl. batteries) Supplied accessories AC power cord (1)

Design and specifications are subject to change without notice.

CD RADIO CASSETTE-CORDER

MICROFILM

TABLE OF CONTENTS

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

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

3. DISASSEMBLY

3-1. Front Cabinet Assy ····························································· 5 3-2. Control Board ····································································· 6 3-3. Cabinet (upper) Assy··························································6 3-4. Inlet, Power, Battery, Half Battery Board··························· 7 3-5. Main Board·········································································7 3-6. Mechanism Deck, Optical Pick-up Section························ 8

4. DIAL POINTER INSTALLATION ·······························9

5. ADJUSTMENT

5-1. Mechanical Adjustment ···················································· 10 5-2. Electrical Adjustment ······················································· 10 5-3. Tuner Section···································································· 11 5-4. Reference·········································································· 15

6. DIAGRAM

6-1. Circuit Board Location ····················································· 17 6-2. Block Diagram ································································· 18 6-3. Printed Wiring Board························································ 21 6-4. Schematic Diagram – Main Section(1/2) – ······················ 25 6-5. Schematic Diagram – Main Section(2/2) – ······················ 30 6-6. Explanation of IC Terminals ············································ 33

7. EXPLODED VIEWS·················································38

8. ELECTRICAL PARTS LIST ···································44

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.

— 2 —

SECTION 1

Insert a precision screw driver and push SWITCH(S801)

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 (S801) 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 —

LOCATION AND FUNCTION OF CONTROLS MAIN UNIT

SECTION 2

GENERAL

@¡ @º !ª

!•

1 Tape operation buttons

r button

· button 0 button ) button p, 6 button P button

2 CASSETE LID 3 FM rod antenna 4 DISPLAY ENTER button 5 CD ^ button 6 CD 6 PUSH OPEN/CLOSE button 7 CD + button 8 CD p button

!™!£!¢!∞!§!¶

!¡

9 Battery compartment !º TUNE knob !¡ CD = button !™ DIAL !£ FUNCTION switch !¢ OPR/BA TT indicator !∞ TONE knob !§ 2 Phones jack !¶ MEGA BASS knob !• AC IN Socket !ª VOLUME knob @º PLAY MODE button @¡ Information display

— 4 —

SECTION 3

DISASSEMBLY

• The equipment can be removed using the following procedure.

Front cabinet assySet

Cabinet (upper) assy

Control board

Inlet, power, battery, half battery board

Main board Mechanism deck, optical pick-up section

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

3-1. FRONT CABINET ASSY

Knob (Vol )

Knob (Tone)

Front cabinet assy

+BVTP 3

Screw

Remove the Handle

in the direction of the arrow.

Rear cabinet assy

Screw

+BVTP 3

Open the Lid (CD) in

the direction of the arrow.

Four screws

+BVTP 3

T wo screws

+BVTP 3

Lid, battery case

— 5 —

3-2. CONTROL BOARD

3-3. CABINET (UPPER) ASSY

Three screws

+BVTP 3

Button (CD)

Cabinet (Front) sub assy

Knob (TU)

Screw

2.6

Two screws

+BVTP 2.6

2.6

CONTROL boar

Four screws

Three screws

+BVTP 3

Open the Holder assy, cassette by

pressing STOP/EJECT button.

STOP/EJECT

button

Cabinet (upper) assy

Open the Lid (CD) in

the direction of the arrow.

Screw

+BVTP 3

Open the Handle in

the direction of the arrow.

Connector

Rear cabinet

— 6 —

3-4. INLET, POWER, BATTERY, HALF BATTERY BOARD

Connector

Two screws

INLET board

Four screws

+BVTP 3

Transformer, power

Cover

POWER board

+BVTP 3

BATTERY board

Two screws

+BVTP 3

Rear cabinet

Two connectors

+BVTP 3

HALF BATTERY

board

Two screws

3-5. MAIN BOARD

!¡

Connector

Four screws

+BVTP 3 × 10

Connector

!™

MAIN board

Flexible

Connector

Flexible

DISPLAY

board

Three Screws

+BVTP 3 × 10

— 7 —

VOLUME board

Connecto

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

CD MOTOR board

Two screws

Optical pick-up section

Remove solder

Two screws

+BVTP 3

Three screws

+BVTP 3

RECORD

switch board

Mechanism dec

Two screws

— 8 —

SECTION 4

DIAL POINTER INSTALLATION

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

1 Align the pointer with the groove of front cabinet and insert it as shown in the illustration. 2 Align Tuning knob with front cabinet and fasten the screw.

Front Cabinet

Pointer

Tuning knob B

Screw (2.6 × 8)

3 Turn the Tuning knob in the direction of the arrow as shown in the illustration until pointer agrees with scale “ 0 ” (at leftmost end of

scale).

4 Turn the tuning capacitor gear fully in the direction of the arrow as shown in the illustration. 5 Fasten the front cabinet and rear cabinet with the screws.

T uning knob

— 9 —

Tuning capacitor gear

Rear cabine

SECTION 5

ADJUSTMENTS

5-1. 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

T ape Tension Measurement

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)

5-2. ELECTRICAL ADJUSTMENT

TAPE RECODER SECTION

Standard output level

Output

Load impedance Output signal level

Test tape

T est T ape

WS-48A

P-4-A063

Tape Speed Adjustment

Procedure :

Mode : Playback

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

Signal

3 kHz, 0 dB

6.3 kHz, –10 dB

set

0.25 V (–10 dB)

T ape speed adjustment Head azimuth adjustment.

Ω

0dB = 0.775V

HP OUT

32 Ω

Used for

digital frequency counter

+ –

Torque Meter

CQ-403A

Meter Reading

more than 60 g

(more than 2.12 oz)

J301 (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 Value :

Digital frequency counter

2,910 – 3,090Hz

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

Adjustment Location :

— 10 —

Tape speed adjustment control inside motor

5-3. 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 ADJUSTMENT

Adjust for a maximum reading on level meter.

T2 455 kHz

AM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L3 620 kHz

CT3 1,400 kHz

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

FM ANT IN terminal

level mete

+ –

AM FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L4 520 kHz

CT4 1,780 kHz

FM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T1 10.7 MHz

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L1 86.5 MHz

CT1 109.5 MHz

FM FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L2 86.5 MHz

CT2 109.5 MHz

Adjustment Location : Main board (See page 13)

J301 (phones)

— 11 —

FM VCO Adjustment

color mark

CF1

Procedure :

FM RF Signal generator

0.01µF FM 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 so that the frequency counter reading becomes 76,000 Hz.

Specification Value :

Frequency counter

75,800 – 76,200 Hz

Frequency counte

IC1 Pin

0.01µF

33k

Ω

+ –

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

Adjustment Location : MAIN board (See page 13)

— 12 —

Adjustment Location : MAIN board (Component side)

L1 FM T rac king Adjustment

L4 AM Frequency Coverage Adjustment

RV1 FM VCO Adjustment

CV1

L2 FM Frequency Coverage Adjustment

CF1

4 1

IC1

T2 AM IF Adjustment

FM ANT IN

AM T rac king Adjustment

Adjustment Location : MAIN board (Conductor side)

CT4 AM Frequency Coverage Adjustment

CT3 AM T rac king Adjustment

T1 FM IF Adjustment

Set the CT2 (FM OSC) and CT4 (AM OSC) trimmers to their extreme outside.

AM OSC

FM OSC

Inside NG Outside OK

FM OSC

CT1 FM T rac king Adjustment

— 13 —

CT2 FM Frequency Coverage Adjustment

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.

• 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.

TRAVERSE Check

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 waveform is symmetrical, as shown in the figure below.

6. Release test mode after adjustment is completed.

VOLT/DIV : 0.1

TIME/DIV : 1m

A = B C = 300mV – 700mV

[MAIN BOARD] (Conductor side)

How to Enter the Set into Test Mode

1. Set the function switch to power off.

2. Set the function switch to CD while = key and p key pressing. The set is into CD test mode (88 is displayed).

3. Turn the power of f to release test mode.

How to Exit the Test Mode

Turn the POWER OFF.

TP (TE)

TP (FE)

TP (VC)

Oscilloscope

(DC range)

+ –

— 14 —

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 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 shown 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

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

[MAIN BOARD] (Conductor side)

5-4. REFERENCE

Focus/Tracking Gain Check

Adjustment Location : MAIN board (Component side)

(See page 16)

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/Tracking 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

• The time until music starts

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

Focus

low

—

high

Tracking

low or high

low

high

(RF)

TP(VC)

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 below. (Focus waveform)

Oscilloscope

(DC range)

+ –

— 15 —

• Good Example

• Incorrect Examples (Fundamental wave appears)

VOLT/DIV : 100m TIME/DIV : 1ms

100mV 0V

• Incorrent Examples (DC level changes more than on adjusted waveform)

VOLT/DIV : 100m TIME/DIV : 2ms

200mV

low focus gain

VOLT/DIV : 100m TIME/DIV : 2ms

75mV 0V

VOLT/DIV : 0.2 TIME/DIV : 2ms

low tracking gain

VOLT/DIV : 0.2 TIME/DIV : 2ms

high tracking gain (high fundamental wave than for low gain)

[MAIN BOARD] (Conductor side)

high focus gain

5. Connect an oscilloscope between TP (TE) and TP (VC).

6. Insert disc (YEDS-18) and press the CD ^ button.

7. Check that the waveform is as shown in the figure below. (tracking waveform)

VOLT/DIV : 0.2 TIME/DIV : 2ms

TP (TE)

TP (FE)

TP (VC)

Oscilloscope

(DC range)

+ –

— 16 —

SECTION 6

DIAGRAMS

CFD-V27

6-1. CIRCUIT BOARDS LOCATION

RECORD SWITCH board

INLET board

POWER board

VOLUME board

DISPLAY board

CONTROL board

CONNECTOR board

BATTERY board

MAIN board

HALF BATTERY board

CD MOTOR boar

6-2. BLOCK DIAGRAM

L2, CT2

FM F-COVERAGE

L3, CT3

AM TRACKING

OPTICAL PICK-UP

BLOCK

(KSS-213CDM)

CNP702

MAIN BOARD

L1, CT1

FM TRACKING

L4, CT4

AM F-COVERAGE

AM IF

FM IF

CNB302

CNJ302

4 3

RECORD SWITCH BOARD

CNJ302

CNB302

KH308

KH307

1 2

2 4

KH306

KH307

VOLUME BOARD

KH307 KH308

KH307 KH306

KH902

3 2 4

CONTROL

KH803

CNP803

3 2

CNB701

4 1

CNP802 CNP801

1-4

5-18

BOARD

LCD BOARD

CNP304

CNJ304

INLET BOARD

CNP902

3 2 4

DRY BATTERY

SIZE "D"

(IEC DESIGNATION R20)

6PCS. 9V

CNP907

CNJ907

CNB907

BATTERY BOARD

CNB907

4 4

CNB908

HALF BATTERY BOARD

RECT

D901-904

KH902

KH904

POWER BOARD

T901

POWER

TRANSFORMER

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.

•

: internal component.

W or less unless otherwise

• 2 : nonflammable resistor.

• C : panel designation.

• H : adjustment for repair.

• U : B+ Line.

• Power voltage is dc 9 V and fed with regulated dc power supply from battery terminal.

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

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

– For Radio, T APE section MAIN (1/2) –

no mark : PLAY (T APE SECTION)

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

– For CD Section MAIN (2/2) –

no mark : CD PLAY

T APE STOP

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

5 6

• Signal path.

F : FM E : PB a : REC J : CD

— 17 — — 18 — — 19 — — 20 —

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