Sony CFD-V77S Service Manual

CFD-V77S

SERVICE MANUAL

Ver 1.1 1999. 05

CD Section

Tape deck Model Name Using Similar Mechanism CFD-V17 Section T ape Tr ansport Mechanism Type MF-V10-117

AEP Model

E Model

Model Name Using Similar Mechanism CFD-V17 CD Mechanism Type KSM-213CDM 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 + 1/-2 dB Wow and flutter Below measurable limit

Radio section

Frequency range FM Italy 87.5 – 108 MHz

Other European 87.6 – 107 MHz models and Saudi Arabia Other models 87.6 – 108 MHz

MW Italy 526.5 – 1,606.5 kHz

Other European 531 – 1,602 kHz models and Saudi Arabia Other models 530 – 1,605 kHz or

531 – 1,602 kHz SW1 2.3 – 7 MHz SW2 7 – 22 MHz

IF FM : 10.7 MHz

AM/MW : 455 kHz

Aerials FM : Telescopic aerial

MW : 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., 6 Ω, cone type (2) Outputs Headphones jack (stereo minijack)

For 16 – 68 Ω impedance headphones

Maximum power output 4.5 W + 4.5 W Power requirements For CD radio cassette-corder

Europe

230 V AC, 50 Hz

Other countries

110 – 120, 220 – 240 V AC selectable, 50/60 Hz or 230 V AC, 50 Hz 9 V DC, 6 R20 (size D) batteries

Power consumption AC 25 W

— Continued on next page —

CD RADIO CASSETTE-CORDER

MICROFILM

Battery life For CD radio cassette-corder:

FM recording

Sony R20P : approx. 3.5 h Sony alkaline LR20 : approx. 10 h

Tape playback

Sony R20P : approx. 1.5 h Sony alkaline LR20 : approx. 5 h

CD playback

Sony R20P : approx. 1 h Sony alkaline LR20 : approx. 4 h

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

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

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

Design and specifications are subject to change without notice.

SAFETY CHECK-OUT

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.

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. Power, Battery, Half Battery, Voltage Selection Board ······ 7 3-5. Volume, Lcd, Mono st, 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. DIAGRAMS

6-1. Circuit Board Location····················································· 17 6-2. Block Diagram ································································· 18 6-3. Printed Wiring Board························································21 6-4. Schematic Diagram – Main Board(1/3) – ························ 25 6-5. Schematic Diagram – Main Board(2/3) – ························ 28 6-6. Schematic Diagram – Main Board(3/3) – ························ 31 6-7. IC Pin Function Description············································· 33

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

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

1. A commercial leakage tester, such as the Simpson 229 or RCA

WT -540A. Follo w the manufacturers’ 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 battery-operated AC v oltmeter . The “limit” indication is 0.75 V, so analog meters must have an accurate low-v oltage scale. The Simpson 250 and Sanwa SH-63Trd are e xamples 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

0.15

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

Ω

1.5 k

Earth Ground

Voltmeter (0.75 V)

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of 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.

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 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 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 !£ BAND switch !¢ FUNCTION switch !∞ OPR/BATT indicator !§ TONE knob !¶ 2 Phones jack !• MEGA BASS knob !ª AC IN jack @º VOLUME knob @¡ PLAY MODE button @™ Information display @£ FINE TUNING knob

— 4 —

SECTION 3

DISASSEMBLY

• The equipment can be removed using the following procedure.

Set

Front cabinet assy

Cabinet (upper) assy

Control board

Power, battery, half battery, voltage selection board

Volume, lcd, mono st, main board

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

3-1. FRONT CABINET ASSY

Tone knob

Vol knob

Front cabinet assy

+BVTP 3

Screw

Mechanism deck, optical pick-up section

Remove the Handle

in the direction of the arrow.

Rear cabinet assy

Screw

+BVTP 3

Open the CD lid in

the direction of the arrow.

Three screws

+BVTP 3

Three screws

+BVTP 3

Lid battery case

— 5 —

3-2. CONTROL BOARD

3-3. CABINET (UPPER) ASSY

Open the cassette holder assy by

pressing STOP/EJECT button.

Screw

+BVTP 3

CD button

Knob (TU)

Front cabinet assy

Screw

+BVTP 2.6 × 8

T wo screws

+BVTP 2.6 × 8

CONTROL boar

Four screws

+BVTP 2.6 × 8

Three screws

+BVTP 3

T wo screws

+BVTP 3

Cabinet (upper) assy

STOP/EJECT

button

!¡

Screw

+BVTP 2.6

Knob(FT)

Chassis(FT)

FINE TUNING

board

Open the CD lid in

the direction of the arrow.

Screw

+BVTP 3

Open the Handle in

the direction of the arrow.

Connector

Rear cabinet

— 6 —

3-4. POWER, BATTERY, HALF BATTERY, VOLTAGE SELECTION BOARD

BATTERY board

Plate(Transformer 4.5W), shield

Connector

Four screws

+BVTP 3 × 10

POWER board

T wo screws

+BVTP 3 × 10

!¡

Cover(VOL SEL)

T wo screws

+BVTP 3 × 10

!™

VOLTA GE SELECTION

board

Rear cabinet assy

3-5. VOLUME, LCD, MONO ST, MAIN BOARD

T wo screws

+BVTP 3 × 8

HALF BATTERY

board

T wo connectors

!¡

Connector

!™

MONO ST board

Connector

Five screws

+BVTP 3 × 10

!£

MAIN board

Flexible

Connector

Flexible

LCD 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

Mechanism deck

+BVTP 3

RECORD

switch board

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 assy and insert it as shown in the illustration. 2 Align Knob (TU) with front cabinet and fasten the screw.

Front Cabinet assy

Pointe

Knob (TU)

Screw

+BVTP 2.6

3 Turn the Knob (TU) 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 assy and rear cabinet assy with the screws.

Knob (TU)

Rear cabinet assy

Tuning capacitor gear

— 9 —

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 Tape

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

0dB = 0.775V

0.25 V (–10 dB)

Tape speed adjustment Head azimuth adjustment.

Ω

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

MW SECTION

Setting : FUNCTION switch : RADIO BAND : MW Signal generator

MW RF signal generator

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

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.

MW IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T2 455 kHz

MW TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L3 620 kHz

CT3 1,400 kHz

MW FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L4 520 kHz (516 kHz)<516 kHz>

CT4 1,680 kHz (1,630 kHz)<1,630 kHz>

FM SECTION

Setting : FUNCTION switch : RADIO BAND : FM Signal generator

FM RF signal generator

0.01µF

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

set

J301 (phones)

SW SECTION

Setting : FUNCTION switch : RADIO BAND : SW1/SW2 FINE TUNING knob : mechanical mid

AM rf signal generator

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

set

J301 (phones)

telescopic antenna input

level mete

Ω

+ –

telescopic antenn input

10 pF

set

level mete

Ω

+ –

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(87.35 MHz )[87.0 MHz]<87.35 MHz>

CT1 109.5 MHz(108.25 MHz )[108.3 MHz]<108.25 MHz>

FM FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L2 86.5 MHz (87.35 MHz )[87.0 MHz]<87.35MHz>

CT2 109.5 MHz (107.8 MHz)[108.3 MHz]<108.25 MHz>

SW1 FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L6 CT6

2.2 MHz 7.3 MHz

SW1 TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L5 CT5

2.2 MHz 7.3 MHz

SW2 FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L8 CT10

6.8 MHz 22.5 MHz

SW2 TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L7 CT9

6.8 MHz 22.5 MHz

( ) : Saudi Arabia model [ ] : AEP model < > : Italian model Adjustment Location : Main board (See page 13)

— 11 —

FM VCO Adjustment

color mark

CF1

Procedure :

FM RF SSG

0.01µF to FM ANT IN terminal

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

75,950 – 76,050 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

L4 MW Frequency Coverage Adjustment

RV1 FM VCO Adjustment

L2 FM Frequency Coverage Adjustment

Adjustment

CV1

L5 SW1 T rac king Adjustment

CT6 SW1 Frequency Coverage Adjustment

L6 SW1 Frequency Coverage Adjustment

CT10 SW2 Frequency Coverage Adjustment

L8 SW2 Frequency Coverage Adjustment

T1 FM IF

Adjustment

IC1

L3 MW T rac king Adjustment

FM ANT IN terminal

Adjustment Location : MAIN board (Conductor side)

T2 MW IF Adjustment

CT9 SW2 T rac king Adjustment

L7 SW2 T rac king Adjustment

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

FM OSC

MW OSC

CT5 SW1 T rac king Adjustment

FM OSC

CT2 FM Frequency Coverage Adjustment

CT4 MW Frequency Coverage Adjustment

CT3 MW T rac king Adjustment

— 13 —

Inside NG

CT1 FM T rac king Adjustment

MW OSC

Outside OK

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.

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 off to release test mode.

How to Exit the Test Mode

Turn the POWER OFF.

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)

TP(TE)

TP(RF)

TP(VC)

TP(FE)

Oscilloscope

(DC range)

TP (TE)

TP (FE)

TP (VC)

+ –

— 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 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

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 mar gin, so e ven if it is slightly of f, there is no problem. Focus/Tracking gain determines the pick-up follo w-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

TP(VC)

(RF)

TP(VC)

TP(RF)

Oscilloscope

(DC range)

+ –

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 f igure below . (Focus waveform)

— 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

high focus gain

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)

TP(TE)

TP(RF)

TP(VC)

TP(FE)

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-V77S

6-1. CIRCUIT BOARDS LOCATION

RECORD SWITCH board

POWER board

VOLUME board

LCD board

CONTROL board

CONNECTOR board

VOLTAGE

SELECTION

board

BATTERY board

FINE TUNING

board

MONO ST board

HALF BATTERY board

CD MOTOR board

MAIN board

6-2. BLOCK DIAGRAM

AEP, CEF, CET MODEL

MONO ST BOARD

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

CNB907

VOLTAGE

SELECTION

BOARD

E,EA,SP MODELSAEP, CEF, CET MODELS

and tantalums.

• All resistors are in Ω and 1/ specified.

•

• 2 : nonflammable resistor.

• C : panel designation.

• H : adjustment for repair.

• U : B+ Line.

• Po wer voltage is dc 9 V and f ed with regulated dc power

• Voltages and waveforms are dc with respect to ground

– For MAIN BOARD (1/3) –

– For MAIN BOARD (2/3) –

– For MAIN BOARD (3/3) –

• V oltages are taken with a V OM (Input impedance 10 MΩ).

• Signal path.

• Abbreviation

: internal component.

supply from battery terminal. 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.

no mark : PLAY (TAPE SECTION)

CD STOP

( ) : REC (TAPE SECTION) no mark : CD PLAY

TAPE STOP

no mark : FM ( ) : MW [ ] : SW

Voltage variations may be noted due to normal production tolerances.

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

EA : Saudi Arabia model SP : Singapore model CEF : Italian model CET : East European and Russian models

W or less unless otherwise

— 17 — — 18 — — 19 — — 20 —

CFD-V77S

6-3. PRINTED WIRING BOARD • Refer to page 20 for Note on Printed Wiring Board. • Refer to page 17 for Circuit Boards Location.

• Semiconductor

Location

Ref. No. Location

D1 C-3 D2 C-3 D3 E-4 D4 E-4 D301 G-9 D302 D-9 D307 E-8 D308 D-8 D310 H-9 D311 C-10 D312 G-8 D314 H-8 D401 C-11 D402 C-11 D403 B-10 D404 B-10 D406 B-10 D407 B-10 D408 B-10 D409 D-11 D410 D-11 D411 D-11 D801 D-7 D901 D-20 D902 C-20 D903 D-20 D904 D-20

IC1 E-5 IC301 F-9 IC303 D-10 IC304 F-10 IC701 B-5 IC702 C-9 IC703 C-4

Q1 E-6 Q2 G-5 Q101 F-10 Q102 G-8 Q103 H-8 Q201 E-9 Q202 G-8 Q203 G-9 Q301 E-9 Q307 C-11 Q308 C-10 Q309 C-10 Q310 E-8 Q401 B-11 Q402 B-11 Q403 B-10 Q404 B-10 Q405 B-11 Q406 C-10 Q407 D-9 Q408 A-10 Q409 D-11 Q701 B-6 Q801 D-6

MAIN BOARD

FERRITEROD

ANTENNA

(MW)

AEP, CEF, CET

MODELS

FINE TUNING BOARD

FINE

TUNING

1-672-961-

AEP, CEF, CET MODELS

MONO ST BOARD

3 4 5 6 7 8 9 10111213141516171819202122232425

CONNECTOR BOARD

11 (11)

1-673-261-

S901

VOLTAGE SELECTOR

110 - 120V

220 - 240V

11 (11)

FM TELESCOPIC

ANTENNA

11 (11)

ANT1

AEP, CEF, CET

MODELS

EA MODEL

OPTICAL

PICK-UP BLOCK

ASSY

E, EA, SP MODELS

CV1

TUNING

-7 -8

-5 -6

-3 -4

-1 -2 S1

BAND

MW SW2 SW1

S351

FUNCTION

TAPE

(CD/RADIO OFF)

RADIO

D310

(OPR/BATT)

RED WHT

TONE

BLU YEL BLK BRO VIO

R251

11 (11)

RED WHT BLU YEL

REC/PB

HEAD

RECORD SWITCH BOARD

RED WHT GRY WHT

1-672-955-

MEGA BASS

RED WHT BLU YEL BLK BRO VIO

VOLUME

S301 REC

11 (11)

1-672-959-

11 (11)

RED

WHT

CONTROL BOARDLCD BOARD

DISPLAY/ENTER

PLAY MODE

LCD800

(LIQUID CRYSTAL DISPLAY)

1-672-957-

BATTERY BOARDVOLUME BOARD

DRY BATTERY

SIZE "D"

IEC DESIGNATION

R20 3PCS. 4.5V

DRY BATTERY

SIZE "D"

IEC DESIGNATION

1-672-302-

BLK

11 (11)

R20 3PCS. 4.5V

11 (11)

HALF BATTERY BOARD

1-672-358-

11 (11)

POWER BOARD

PS901

T901

POWER

TRANSFORMER

1 3

BLU WHT RED

AEP, CEF, CET MODELS

E, EA, SP MODELS

AEP, CEF, CET MODELS

E, EA, SP MODELS

E, EA, SP MODELS AEP, CEF, CET MODELS

WHT

BLU

YEL

RED

J901

~ AC IN

1-672-956-

1-672-958-

E, EA, SP MODELS

VOLTAGE SELECTION BOARD

S901

1-672-960-

11 (11)

— 21 — — 22 — — 23 — — 24 —

6-4. SCHEMATIC DIAGRAM – MAIN BOARD (1/3) – • Refer to page 20 for Note on Schematic Diagram. • Refer to page 35 for IC Block Diagrams.

CFD-V77S

CN 301 2 REC MODE C313

55.2kHz

— 25 — — 26 — — 27 —

10V/div 10µsec/div

30Vp-p

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

CFD-V77S

6-5. SCHEMATIC DIAGRAM – MAIN BOARD (2/3) – • Refer to page 20 for Note on Schematic Diagram. • Refer to page 35 for IC Block Diagrams.

IC701 #£ RFO

IC702 ` XTAO

104

16.9 MHz

0.2V/div

0.5µsec/div

1.0 Vp-p

2V/div 50µsec/div

5 Vp-p

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

— 28 — — 29 — — 30 —

6-6. SCHEMATIC DIAGRAM – MAIN BOARD (3/3) – • Refer to page 20 for Note on Schematic Diagram.

• Refer to page 35 for IC Block Diagrams.

CFD-V77S

— 31 — — 32 —

6-7. IC PIN FUNCTION DESCRIPTION

IC702 CD DIGITAL SIGNAL PROCESSOR, LED DRIVE, SYSTEM CONTROL (CXP401-602R)

Pin No. Pin name I/O Description

1 SEIN I CD SENS input. 2 CNIN I CD SENS input. 3 DATO O CD DSP command data output. 4 XLTO O Latch output. 5 CLKO O Clock output for CD DSP command. 6DVSS– Digital ground. 7DVDD– Digital power supply (+5V). 8 MON – Not used (Open).

9 MDP O Spindle motor drive control. 10 MDS – Not used (Open). 11 LOCK O Lock signal output. 12 VPCO2 – Not used (Open). 13 VPCO1 – Not used (Open). 14 VCKI – Not used (Connect to !∞ pin). 15 V16M – Not used (Connect to !¢ pin). 16 VCTL – Not used (“H” level). 17 PCO O Decoder PLL phase comparator output. 18 FILI I Decoder PLL filter input. 19 FILO O Decoder PLL filter output. 20 AV 21 CLTV I Decoder PLL VCO control voltage input. 22 AV 23 RF I CD RF signal input. 24 BIAS I Playback EFM asymmetry current constant input. 25 ASYI I Playback EFM asymmerty comparater voltage input. 26 ASYO O Playback EFM full swing output. 27 TEST1 I Test terminal (Fixed at “L”). 28 TEST2 I Test terminal (Fixed at “L”). 29 XRST I CD reset input. 30 XRSTO O CD reset output. “L” : Reset 31 FOK I FOK signal input. 32 LRCK O L/R clock signal output. (Connect to #£ pin) 33 LRCKI I L/R clock signal input. (Connect to #™ pin) 34 PCMD O PCM data output. (Connect to #∞ pin) 35 PCMDI I PCM data input. (Connect to #¢ pin) 36 BCK O Bit clock signal output. (Connect to #¶ pin) 37 BCKI I Bit clock signal input. (Connect to #§ pin) 38 GTOP – Not used (Open). 39 XPCK – Not used (Open). 40 GFS – Not used (Open). 41 RFCK – Not used (Open). 42 C2PO – Not used (Open). 43 DV 44 DV 45 XROF – Not used (Open).

– Analog ground.

– Analog power supply (+5V).

– Digital ground. – Digital power supply (+5V).

Pin No. Pin name I/O Description

46 MNT3 – Not used (Open). 47 MNT1 – Not used (Open). 48 MNT0 – Not used (Open). 49 C4M – Not used (Open). 50 DOUT – Not used (Open). 51 EMPHI – Not used (Open). 52 WFCK – Not used (Open). 53 SCOR – Not used (Open). 54 SBSO – Not used (Open). 55 EXCK – Not used (Open). 56 DTEST I Test terminal (Fixed at “L”). 57 CTEST I Test terminal (Fixed at “L”). 58 FR I = key input. 59 PLAY/PAUSE I ^ key input. 60 FF I

key input. 61 STOP I p key input. 62 MODE I PLAY MODE key input. 63 DISP/ENTER I DISPLAY/ENTER key input. 64 AU MUTE O Audio mute signal output. 65 BTL MUTE O BTL mute signal output. 66 SENCE2 I CD SENCE input. 67 REC I Function REC input. 68 LIMIT SW I LIMIT switch input. 69 OPEN/CLOSE I CD door open/close switch input. 70 RMC – Not used (Fixed at “H”). 71 DV 72 DV

– Digital ground.

– Digital power supply (+5V). 73 SEG 15 – Not used (Open). 74 SEG 14 – Not used (Open).

75 – 88 SEG 0 – 13 O LCD segment output. 89 – 92 COM 0 – 3 O LCD common output. 93 – 95 VCL 1 – 3 I LCD drive device voltage input.

96 AVSS1 – Analog ground. 97 AVDD1 – Analog power supply (+5V). 98 AOUT1 O Audio output. 99 AIN1 I Audio input.

100 LOUT1 O L-CH audio output. 101 AVSS1 – Analog ground. 102 XV

– Oscillator power supply (+5V).

103 XTAI I Oscillator connect terminal (16.9344MHz). 104 XTAO O Oscillator connect terminal (16.9344MHz). 105 XV

– Oscillator ground.

106 AVSS2 – Analog ground. 107 LOUT2 O R-CH audio output. 108 AIN2 I Audio input. 109 AOUT2 O Audio output. 110 AVDD2 – Digital power supply (+5V). 111 AVSS2 – Ground terminal. 112 NC – Not used (Connect to ground).

— 33 — — 34 —

• IC BLOCK DIAGRAMS IC1 CXA1538S

GND

PLL LPF

MPX REG

VCOFMDISCRI

MUTE

AM OSC

AFC

FM OSC

REG

FM RF

AM IN

2030 29 28 27 262524 23 22 21

FM FRONT-END

RF IN

GND_FE

IF OUT

IC301 T A2068N

LIN

MIC

2324

15k

LINE

I/EX

PLL LPF 1

PILOT DET

RADOI

VCO

LPF

L. RAD

10k

MONO/ST SELECT

ST IND

VCO CHECK

REC

10k

MONITOR

MPX REG.

AMP

1/2

COUNTER

1/2

COUNTER

DECORD AMP

L. LO

7dB

MUTING

R_ch

REG

PD 1

PD 2

L_ch

VCC

LOGIC

AUTOBLEND

RIPPLE

FILTER

VCC

R. LO

181920

7dB

MONITOR

FILTER

RIPPLE

AMP

AM FRONT-END

J AGC : AFC

10k

BAND PASS

MUTE

U AGC : AFC

LINE

FM IF / DISCRI

IF / DET

TUNING

INDICATOR

TUN

IF, DET GND

10k

FM IF IN

R. RAD

RADIO

AM IF IN

BAND SELE

LINE

TAPE

10k

R. LIN

MIC

MUTE

TAPE

10k

–––––

TAPE

BUF AMP

NAB

AMP1

AGC

L. PO

10k

L. NF

BUF AMP

10k

26dB 26dB

REC

AMP1

L. RO

ALC1

REF AMP

L. IN

DET

REF

GND

BUF AMP

ALC2

2.1

10k

MUTE

R. IN

10k

REC

AMP2

10k

R. RO

–––––

BUF AMP

MUTE

AMP2

R. NF

TAPE

NAB

TAPE

R. PO

AMP1

10k

MIC

— 35 —

+ 53 hidden pages