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13

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 demagne-

tizer. (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 sup-

ply voltage (9V) unless otherwise noted.

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

0.1 – 0.49 mN•m

Back Tension

CQ-102C

(1.0 – 5.0 g•cm)

(0.014 – 0.069 oz•inch)

4.42 – 9.31 mN•m

Fast Forward

CQ-201B

(45 – 95 g•cm)

(0.62 – 1.32 oz•inch)

4.42 – 9.31 mN•m

Rewind

CQ-201B

(45 – 95 g•cm)

(0.62 – 1.32 oz•inch)

Torque Meter

Meter Reading

CQ-403A

more than 60g

(more than 2.12 oz)

Output terminal

HP OUT

load impedance

32 

Ω

output signal level

0.25V (–10dB)

Type

Signal

Used for

WS-48A

3kHz, 0dB

Tape Speed Adjustment

Mode : Playback

Adjustment Value : 3,000Hz
Standard Value : 2,940 - 3,060Hz

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

Ω

 0dB = 0.775V

Adjustment Location : Mechanism deck

14

MW/LW IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T1

455kHz

(     ): AEP, UK

AM (MW) FREQUENCY COVERAGE CHECK

Frequency Display

530 kHz

1,710 kHz

(531 kHz)

(1,611 kHz)

Reading on Digital voltmeter

1.0 (0.8)

+ 0.7 V

4.8 (5.0)

+ 1.2 V

– 0.5 V

– 0.6 V

Adjustment Part

<confirmation>

<confirmation>

(     ): AEP, UK

AM (MW) TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L4 (L3)

CT3

620 kHz (621 kHz)

1,400 kHz (1,404 kHz)

LW FREQUENCY COVERAGE ADJUSTMENT (AEP, UK)

Frequency Display

153 kHz

279 kHz

Reading on Digital voltmeter

0.7

+ 0.3 V

5.0 

± 0.1 V

– 0.4 V

Adjustment Part

<confirmation>

L4

LW TRACKING ADJUSTMENT (AEP, UK)

Adjust for a maximum reading on level meter.

L3

CT5

162 kHz

261 kHz

FM FREQUENCY COVERAGE ADJUSTMENT

Frequency Display

87.5 MHz

108 MHz

Reading on Digital voltmeter

1.6 

± 0.4 V

4.0 

± 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

Adjustment Location : Main board (See page 15)

• Repeat the procedures in each adjustment several times, and the

frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.

Function switch : AM (US, Canadian, Korean, Taiwan)

  MW or LW (AEP, UK)

Volume

: MIN

Function switch : FM
Volume

: MIN

µF

 0dB = 1 

µV

i

Ω

Ω

15

CONTROL BOARD (Condustor side)

R616

S604

R606

R611

TEST B

TEST A

VOLUME

MEGA BASS

SOUND

R636

R631

R603

R632

R633

R605

R604

S603

-

S606

S605

S611

+

TEST mode : momentanly short

Focus Bias Check
1. Connect the oscilloscope between TP4003 (RF DC) and GND

on CD board.

2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01) (CD)
3. Press the u button two times (LPC ON).
4. Confirm that the oscilloscope waveform is as shown in the fig-

ure below. (eye pattern)
A good eye pattern means that the diamond shape (

◊) in the cen-

ter of the waveform can be clearly distinguished.

5. Press the u button.(LPC OFF)
6. Perform confirmation in step 4 again.
7. Insert the disc (TCD-W082L)(Part No:J-2502-063-2)(CD-RW)
8. Perform confirmation in step 3 to step 6.

•

RF Signal Reference Waveform (eye pattern)

Perform all CD section check and all adjustments in the test mode.
How to put the set into CD test mode
1. Press the POWER button turn the set ON.
2. Press the FUNCTION button to select CD.
3. Set Tset mode by momentarily shorting both side of TEST A.
4. Press the x button two times. The set is into CD test mode

(

88 is displayed)

5. Turn the power off to release test mode.

 

 

 

 

 

 

2

8

C1092

Q1010

C

C1084

RV1002

R1071

R1078

R1076

R1072

R1079

R107

R1067

R1070

4

Q1007

R1019

IC1007

R1004

oscilloscope

(AC range)

TP 4002(FE)

IC 1007 10pin

CD BOARD   (SIDE A)

When observing the eye pattern, set the oscilloscope for AC range
and raise certical sensitivity

 

 

 

 

 

 

2

4

2

C1065

R1037

R1033

C1049

TP4002(FE)

R1060

R1059

R1061

R1047

C1056

C1058

TP4003(RF DC)

C1068

IC1006

L1007

R1038

R1048

C1050

FB1

FB

FB

FL100

TP4003
(RF DC)

  

(SIDE A)

oscilloscope

(AC range)

(GND)

Focus Erorr Adjustment
1. Connect the oscilloscope between TP4002(FE) and IC1007 10

pin on CD board.

2. Set to no disc and CD stop status.
3. Adjust RV1001 so that the center of the waveform meets the

specifications.

A

A: –100mV to +100mV

0V

Center of the waveform.

Specifications :

Adjustment Location : See page 16

16

TUNER BOARD   
(Component side)

CD BOARD   

(SIDE A)

IC1007

RV1001:Focus Erorr Adjustment

IC1006