SONY CFD G555CP Service Manual

CFD-G55

SERVICE MANUAL

Ver 1.2 2002. 07

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC DISTORTION

With 3.2-ohm loads, both channels driven from 1 000 - 10 000 Hz; rated 3 W per channel-minimum RMS power, with no more than 10 % total harmonic distortion in AC operation. Woofer with 4-ohm loads, driven at 50 - 150 Hz; rated 6 W minimum RMS power, with no more 10 % total harmonic distortion in AC operation.

Other specifications

CD player section

System

Compact disc digital audio system

Laser diode properties

Material: GaAlAs Wave length: 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

Frequency response

20 - 20 000 Hz +1/–2 dB

Wow and flutter

Below measurable limit

Radio section

Frequency range

FM : 87.5 - 108 MHz AM: 530 - 1 710 kHz (Other models)

: 531 - 1 611 kHz (9 kHz Step) 530 - 1 610 kHz (10 kHz Step) (MY, SP, EA models)

FM : 10.7 MHz AM: 450 kHz

Antennas

FM: Telescopic antenna AM: Built-in ferrite bar antenna

Cassette-corder section

Recording system

4-track 2 channel stereo

Fast winding time

Approx. 115 s (sec.) with Sony cassette C-60

Frequency response

TYPE I (normal): 70 - 13 000 Hz

General

Speaker

Full range: 10 cm (4 (2) Woofer: 8 cm (3

Outputs

Headphones jack (stereo minijack) For 16 - 68 Ω impedance headphones

Power output

4 W + 4 W (at 3.2 Ω, 10% harmonic distortion in DC operation) Woofer:

12 W (at 4 Ω, 10 % harmonic distortion in DC operation)

Power requirements

For CD radio cassette-corder: 120V AC, 60 Hz (Other models) 110-127V, 220-240V AC Selectable, 60Hz (EA model) 230V AC, 50Hz (MY, SP models) 12 V DC, 8 size D (R20) batteries For remote control: 3 V DC, 2 size AA (R6) batteries

in.) dia., 3.2 Ω

⁄

in.) dia., 4 Ω, cone type (1)

US Model

Canadian Model

E Model

Model Name Using Similar Mechanism

CD Mechanism Type KSM-213RDP

Optical Pick-up Type KSS-213R

Tape Transport Mechanism Type MF-V5-117

, cone type

CD Section NEW

Tape Section CFD-G50

Power consumption

AC 30 W

Battery life

For CD radio cassette-corder:

FM recording

Sony R20P: approx. 6 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. 456 × 195 × 330 mm (w/h/d)

(18 × 7

⁄4 × 13 inches) (incl. projecting parts)

Mass

Approx. 6.8 kg (14 lb. 16 oz) (incl. batteries)

Supplied accessory

AC power cord (1) Remote control (1)

Design and specifications are subject to change without notice.

• Abbreviation EA : Saudi Arabia model.

MY : Malaysia model. SP : Singapore model.

CD RADIO CASSETTE-CORDER

9-873-639-03

2002G1600-1

Sony Corporation

Personal Audio Company

Published by Sony Engineering Corporation

CFD-G55

Ver 1.1 2002.05

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.

TABLE OF CONTENTS

1. SERVICING NOTES ······················································ 3

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

3. DISASSEMBLY ································································ 5

3-1. Cabinet (Front) Assy- 1················································· 5 3-2. Cabinet (Front) Assy- 2················································· 6 3-3. CONTROL (POWER), CONTROL (CD),

HEADPHONE Board ··················································· 6 3-4. Panel Assy ····································································· 7 3-5. LCD Board, Panel (Upper) ··········································· 7 3-6. Panel (Upper) Assy- 1 ··················································· 8 3-7. Panel (Upper) Assy- 2 ··················································· 8 3-8. POWER, TRANS, VOL SEL Board····························· 9 3-9. TUNER Board, Duct (Upper, Lower)··························· 9 3-10. BATT COM, BATT Board ·········································· 10 3-11. MAIN Board- 1 ··························································· 10 3-12. MAIN Board- 2 ··························································· 11 3-13. Mechanism Deck Section (MF-V5-117) ···················· 11 3-14. CD Block Section (KSM-213RDP) ···························· 12 3-15. PDW, L-R/REG Board ················································ 12

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. ADJUSTMENTS ···························································· 13

4-1. Mechanical Adjustments ············································· 13 4-2. Electrical Adjustments ················································ 13

5. DIAGRAMS······································································ 17

5-1. Circuit Boards Location ··············································17 5-2. Block Diagrams ·························································· 18

MAIN Section ····························································· 18

TUNER/CD Section ··················································· 19 5-3. Printed Wiring Board – TUNER Section –················ 20 5-4. Schematic Diagram – TUNER Section – ··················· 21 5-5. Printed Wiring Board – CD Section – ························ 22 5-6. Schematic Diagram – CD Section – ··························· 23 5-7. Printed Wiring Board – TC Section – ························· 24 5-8. Schematic Diagram – TC Section – ····························24 5-9. Printed Wiring Board – MAIN Section – ··················· 25 5-10. Schematic Diagram – MAIN Section (1/2) – ············· 26 5-11. Schematic Diagram – MAIN Section (2/2) – ············· 27 5-12. Printed Wiring Board – AMP Section –······················ 28 5-13. Schematic Diagram – AMP Section – ························ 29 5-14. Printed Wiring Board – CONTROL Section – ··········· 30 5-15. Schematic Diagram – CONTROL Section – ·············· 31 5-16. Printed Wiring Board – POWER Section – ················ 32 5-17. Schematic Diagram – POWER Section – ··················· 33 5-18. IC Pin Function Description ······································· 36

6. EXPLODED VIEWS ······················································ 38

6-1. Cabinet (Front) Section ··············································· 38 6-2. Cabinet (Rear) Section ················································39 6-3. Cabinet (Upper) Section ············································· 40 6-4. Mechanism Deck Section- 1 (MF-V5-117) ················ 41 6-5. Mechanism Deck Section- 2 (MF-V5-117) ················ 42 6-6. CD Mechanism Section (KSM-213RDP) ··················· 43

7. ELECTRICAL PARTS LIST······································· 44

ATTENTION AU COMPOSANT AYANT RAPPORT

LES COMPOSANTS IDENTIFÉS P AR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMA TIQUES 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.

À LA SÉCURITÉ!

SECTION 1

SERVICING NOTES

CFD-G55

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 AC 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. Follow 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 voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd 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)

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 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

To Exposed Metal

Parts on Set

0.15 µF

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

1.5 kΩ

Earth Ground

Voltmeter (0.75 V)

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.

Insert a precision screw driver and push SWITCH (S801)

CFD-G55

Location of controls

SECTION 2

GENERAL

This section is extracted from instruction manual.

Inserting a cassette

With the side you want to play facing upward

POWER

SLEEP

LINE

Loading a CD

SOUND

POWER DRIVE WOOFER

MODE

TUNE –, +

Display

Remote sensor

VOLUME –, +*

DISPLAY ENTER MEMORY

LINE IN

(rear)

OPR/BATT

With the labeled side up

Z PUSH OPEN/CLOSE

., >

PRESET –, +

BAND AUTO PRESET

Display

Total track number

Total playing time

Programmed track

Playing order

Remote Control

SLEEP

FUNCTION

Number buttons

MODE

BAND

TUNE+, –

SOUND

POWER

VOL +*, –

.,>

WOOFER

About CD-Rs/CD-RWs

This player can play CD-Rs/CD-RWs recorded in the CD-DA format*, but playback capability may vary depending on the quality of the disc and the condition of the recording device.

* CD-DA is the abbreviation for Compact

Disc Digital Audio. It is a recording standard used for Audio CDs.

*The button has a tactile dot.

SECTION 3

DISASSEMBLY

• The equipment can be removed using the following procedure.

Set

CFD-G55

Ver 1.1 2002.05

CABINET (FRONT) ASSY-1

CABINET (FRONT) ASSY-2

(page 5)

(page 6)

PANEL (UPPER) ASSY-1

(page 8)

PANEL (UPPER) ASSY-2

(page 8)

POWER, TRANS, V OL SEL BOARD

TUNER BOARD, DUCT (UPPER, LOWER)

BATT COM, BATT BOARD

CONTROL (POWER), CONTROL (CD), HEADPHONE BOARD

PANEL ASSY

(page 7)

MAIN BOARD-1

(page 10)

(page 9)

(page 10)

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

3-1. Cabinet (Front) Assy- 1

(page 6)

LCD BOARD, PANEL (UPPER)

(page 7)

MAIN BOARD-2

(page 11)

MECHANISM DECK SECTION (MF-V5-117)

CD BLOCK SECTION (KSM-213RDP)

PDW, L-R/REG BOARD

(page 12)

(page 11)

(page 12)

Open the CD lid in the

direction of the arrow.

detail view

screw

+BVTP 3 × 10

eight screws

+BVTP 3 × 14

two screws

+BVTP 3 × 20

Remove the battery case lid

in the direction of the arrow.

CFD-G55

3-2. Cabinet (Front) Assy- 2

Remove the cabinet (front) assy

in the direction of the arrow.

flexible flat cable

(from MAIN board CNP804)

HEADPHONE board

CNP391

(from PWD board KH353)

CNP393

(from L-R/REG board KH374)

flexible flat cable

(from MAIN board CNP801)

MAIN board

3-3. CONTROL (POWER) , CONTROL (CD) , HEADPHONE Board

CONTROL (POWER) board,

power button

screw

+BVTP 3

two screws

+BVTP 2.6

HEADPHONE board

+BVTP 2.6

CONTROL (CD) board,

CD button

two screws

3-4. Panel Assy

)

panel assy

flexible flat cable

(from MAIN board CNP801)

screw

+BVTP 3 × 10

flexible flat cable

(from MAIN board CNP804)

CFD-G55

3-5. LCD Board, Panel (Upper)

+BVTP 2.6 × 10

front panel section

two screws

!¡

LCD board

!™

upper Panel

PDW button

VOL button

four screws

+BVTP 2.6 × 1

two screws

+BVTP 2.6 × 10

light guide plate

(PWD)

flexible flat cable

(from MAIN board CNP801)

flexible flat cable

(from MAIN board CNP804

VOL CONTROL board

six screws

+BVTP 2.6 ×10

CFD-G55

3-6. Panel (Upper) Assy- 1

Push STOP/EJECT button.

CNP903

(from MAIN board KH301)

Open the cassette holder assy

in the direction of the arrow.

Open the CD lid in the

direction of the arrow.

in the direction of the arrow.

Remove two harnesses

3-7. Panel (Upper) Assy- 2

Remove two harnesses

in the direction of the arrow.

+BVTP 3

handle

five screws

CNP1

(from MAIN board KH801)

four screws

+BVTP 3

Remove the panel (upper) assy

in the direction of the arrow.

Move the telescopic antenna in

the direction of the arrow.

3-8. POWER, TRANS, VOL SEL Board

five screws

+BVTP 3 × 10

CNP902

(from BATT board KH951)

CFD-G55

Ver 1.1 2002.05

POWER board, TRANS board,

VOL SEL board

two screws

+BVTP 3 × 10

two screws

+BVTP 3 × 10

Remove harnesses in the direction

of the arrow.

3-9. TUNER Board, Duct (Upper, Lower)

trans chassis

screw

+BVTP 3 × 10

power transformer (T901)

four screws

+BVTP 3 × 10

seven screws

+BVTP 2.6

two screws

+BVTP 3 × 10

two screws

+BVTP 3 × 10

lower duct

woofer bracket

upper duct

screw

+BVTP 3 × 10

two screws

+BVTP 3 × 10

TUNER board

chassis (TU)

CFD-G55

3-10. BATT COM, BATT Board

Remove harnesses in the direction

of the arrow.

BATT board

CNP902

(from BATT board KH951)

battery

terminal

BATT COM board

battery termina

3-11. MAIN Board- 1

CD door sw

(S801)

PDW board

CNP352

CNP351

four screws

+BVTP 3

BATT board

screw

3 × 8 (DIA, 10),+WH

MAIN board

+BVTP 3 × 10

CNP302

screw

3 × 8 (DIA, 10),+W

four screws

L-R/REG board

flexible flat cable

CNP802

!¡

hook

flexible flat cable

CNP805

CNP371

CNP37

CNP373

3-12. MAIN Board- 2

PDW board

CFD-G55

MAIN boar

CNP353

chassis (CD)

from TUNER board CNP1

from POWER board CNP903

from HEADPHONE board CNP391

from HEADPHONE board CNP393

3-13. Mechanism Deck Section (MF-V5-117)

flexible flat cable

(from MAIN board CNP805)

screw

+PTT 2

TC board

L-R/REG board

CNP374

three screws

+BVTP 3

mechanism deck section

(MF-V5-117)

CFD-G55

)

3-14. CD Block Section

(KSM-213RDP)

CNP701

Remove solderings

from the four points.

flexible flat cable

(from MAIN board CNP802

CD board

four screws

+PWH 2.6

CD block section

(KSM-213RDP)

3-15. PDW, L-R/REG Board

PDW board,

Chassis (HS, R)

three screws

+BVTP 3 × 10

clamp

screw

two screws

+BVTP 3

chassis (HS, L)

L-R/REG board,

SECTION 4

ADJUSTMENTS

CFD-G55

4-1. Mechanical Adjustments

PRECAUTION

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

record/playback head pinch roller erase head rubber belts capstan

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. The adjustments should be performed with the rated power supply voltage (12V) unless otherwise noted.

Torque Measurement

Torque Torque Meter Meter Reading

1.77 – 5.88 mN•m

Forward CQ-102C (18 – 60 g•cm)

(0.25 – 0.83 oz•inch)

Forward Back Tension

Fast Forward CQ-201B (45 – 95 g•cm)

Rewind CQ-201B (45 – 95 g•cm)

CQ-102C (1.0 – 5.0 g•cm)

0.1 – 0.49 mN•m

(0.014 – 0.069 oz•inch)

4.42 – 9.31 mN•m

(0.62 – 1.32 oz•inch)

4.42 – 9.31 mN•m

(0.62 – 1.32 oz•inch)

4-2. Electrical Adjustments TAPE SECTION

Standard Output Level

Output terminal HP OUT

load impedance 32 Ω

output signal level 0.25V (–10dB)

Test T ape

Type Signal Used for

WS-48A 3kHz, 0dB Tape Speed Adjustment

Tape Speed Adjustment

Procedure :

Mode : Playback

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

set

Adjustment so than the value on the digital frequency counter is 3,000 Hz.

Adjustment V alue : 3,000Hz Standard V alue : 2,940 - 3,060Hz

J391

(

0dB = 0.775V

digital frequenc counter

Ω

)

Tape Tension Measurement

Torque Meter Meter Reading

CQ-403A

more than 60g

(more than 2.12 oz)

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

Adjustment Location : Mechanism deck

Tape speed adjustment control inside motor

CFD-G55

)

Ver 1.1 2002.05

TUNER SECTION

AM Section

Function switch : AM

AM RF signal generator

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

FM Section

Function switch : FM

FM RF signal generator

33.75kHz frequency deviation by 1kHz signal. Output level : as low as possible

0dB = 1 µV

Put the lead-wire antenna close to the set.

0.01

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T1 450 kHz

( ): 9 kHz step (MY, SP, EA) < >: 10 kHz step (MY, SP, EA) no mark: Others

AM FREQUENCY COVERAGE ADJUSTMENT

Frequency Display

Reading on Digital voltmeter 1.0 ± 0.1 V

Adjustment Part L 4 confirmation

530 kHz 1,710 kHz

(531 kHz) (1,611 kHz)

<530 kHz> <1,610 kHz>

5.3 ± 0.8V

(4.8 ± 0.8V)

<4.8± 0.8V>

< >: 9 kHz step (MY, SP, EA) no mark: Others

AM TRACKING ADJUSTMENT

telescopi antenna terminal

Adjust for a maximum reading on level meter.

L3 CT3

620 kHz <621kHz> 1,400 kHz <1,404 kHz>

FM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T2 10.7 MHz

• Connecting Level Meter (FM and AM)

level meter (range: 0.5–5 V ac

Ω

set

J391 ( i

)

• Connecting Digital Voltmeter (FM and AM)

digital voltmeter

Ω

100 k

TP CV

•Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors.

FM FREQUENCY COVERAGE ADJUSTMENT

Frequency Display 87.5 MHz 108 MHz Reading on Digital voltmeter

1.3 ± 0.4 V 3.0 ± 0.3 V

Adjustment Part confirmation L2

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L1 CT1

87.5 MHz 108 MHz

Abbreviation

MY : Malaysia model. SP : Singapore model. EA : Saudi Arabia model.

Adjustment Location : TUNER board (See page 16)

CFD-G55

RF level

0.85

0.2 Vp-p (LPC ON)

0.95

0.4 Vp-p (LPC OFF)

VOLT/DIV : 200mV TIME/DIV : 500 ns

CD SECTION

CD Test Mode

• How to put the set into CD test mode

1. Press the POWER button to turn the power on.

2. Insert the test disc (YEDS-18). (Part No. : 3-702-101-01) (Function is set to CD.)

3. Set the CD test mode by momentary shorting both sides of TEST- 1 on MAIN board.

4. Press the x button two times. The set is set to the CD test mode. (The message 80 is displayed.)

• How to release the CD test mode

Turn the power off.

[MAIN BOARD] (Conductor side)

IC803

IC802

IC321

IC801

IC805

Focus Bias Check

1. Connect an oscilloscope between TP RF and TP VREF on CD board.

2. Insert the test disc (YEDS-18).

3. Set the CD test mode.

4. Press the u button three times (LPC ON).

5. Confirm that the oscilloscope waveform 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.

6. Press the u button.(LPC OFF)

7. Perform confirmation in step 4 again.

• RF Signal Reference Waveform (eye pattern)

[CD BOARD] (Conductor side)

TEST-1

Traverse Waveform Check

1. Connect an oscilloscope between TP TE and TP VREF on CD board.

2. Set the CD test mode.

3. Press the u botton to play the test disc (YEDS-18).

4. Confirm that the center of the traverse waveform will be at 0V.

5. Confirm that the peak-to-peak voltage value of the traverse waveform meets the specification.

6. Release the CD test mode.

• Traverse waveform

VOLT/DIV : 200mV TIME/DIV : 1 ms

symmetry

TP VREF TP TE TP RF

IC701

A = 0 B = 0.95

220 mV

0.55 Vp-p

A (DC voltage)

CFD-G55

Adjustment Location :

[TUNER BOARD] (Component side)

L1: FM Tracking Adjustment

T2: FM IF Adjustment

T1: AM IF Adjustment

CT1: FM Tracking Adjustment

L4: AM Frequency Coverage Adjustment

L2: FM Frequency Coverage Adjustment

L3: AM Tracking Adjustment

CNP1

CT3: AM Tracking Adjustmen

(Conductor side)

IC2

IC1

TP CV AM/FM Frequency Coverage Adjustment

SECTION 5

DIAGRAMS

CFD-G55

Ver 1.1 2002.05

5-1. Circuit Boards Location

CONTROL (POWER) board

HEADPHONE board

POWER board

LCD board

VOL SEL board

BATT board

TC board

CONTROL (VOL) board

CONTROL (CD) board

L-R/REG board

BATT COM board

MAIN board

TUNER board

Note on Printed Wiring Boards:

• X : parts extracted from the component side.

•

• : Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

: internal component.

• WA VEFORMS – TUNER Section –

– TC Section –

Note on Schematic Diagram:

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

• All resistors are in Ω and 1/ specified.

•

• 2 : nonflammable resistor.

• C : panel designation.

• A : B+ Line.

• H : adjustment for repair.

•Total current is measured with no cassette installed.

•Power voltage is dc 12 V and fed with regulated dc power

•Voltages and waveforms are dc with respect to ground

•Voltages are taken with a VOM (Input impedance 10 MΩ).

•Waveforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.

•Abbreviation

: internal component.

Note:

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

supply from battery terminal.

under no-signal (detuned) conditions. Voltage variations may be noted due to normal produc-

tion tolerances. Voltage variations may be noted due to normal produc-

tion tolerances.

F : FM f : AM E : PB a : REC J : CD d : LINE IN

CND : Canadian model. EA : Saudi Arabia model. MY : Malaysia model. SP : Singapore model. E92 : Chilean and Peruvian model. MX : Mexican model.

W or less unless otherwise

Note:

Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.

– CD Section –

TRANS board

IC2 w; (XOUT)

13.3 500 mV/DIV, 4 µs/DIV

1.4 Vp-p

Q301 collector

(TAPE REC)

1 V/DIV, 10 µs/DIV

3.1 Vp-p

IC701 rk (XOUT)

59 ns

4.2 Vp-p

1 V/DIV, 20 ns/DIV

– MAIN Section –

PDW boar

IC801 ua (XT2)

CD board

30.5 1 V/DIV, 10 µs/DIV

3.6 Vp-p

IC801 ug (X2)

238 ns

1 V/DIV, 100 ns/DIV

3.7 Vp-p

1717

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