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– 9 –

 Follow the installation procedure in the numerical order given.

1 Align the pointer with the groove of “cabinet (front) sub ASSY” and insert it as shown in the illustration.
2 Align knob (TU) with “cabinet (front) sub ASSY” and fasten the screw.

3 Turn the knob (TU) fully in the direction of the allow as shown in the illustration.
4Turn the tuning capacitor gear fully in the direction of the allow as shown in the illustration.
5 Fasten the “cabinet (front) sub ASSY” and cabinet (rear) with the screws.

1

 Pointer

knob (Tu)

Cabinet (front) sub ASSY 

2

 Screw (+BVTP 2.6 

×

 8)

3

 Tuning knob

4

 Tuning capacitor gear

5

Cabinet (rear)

– 10 –

Function switch : AM
Volume

: MIN

Function switch : FM
Volume

: MIN

AM  RF signal
generator

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

Put the lead-wire
antenna close to 
the set.

FM RF signal
generator

22.5kHz frequency deviation by 
400Hz signal.
Output level : as low as possible

telescopic
antenna
terminal

0.01

µ

F

set

32

Ω

J301 (phones)

level meter

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 : 2,970 - 3,030Hz

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

set

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

32

Ω

digital frequency
counter

J301 (phones)

Tape speed adjustment 
control inside motor

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.)
Do not use a magnetized screwdriver for the adjustments.

3. The adjustments should be performed with the rated power sup-

ply voltage (9V) unless otherwise noted.

Torque

Torque Meter

Meter Reading

Forward

CQ-102C

18 – 60 g•cm

(0.25 – 0.83 oz•inch)

Forward

CQ-102C

1.0 – 5.0 g•cm

Back Tension

(0.014 – 0.069 oz•inch)

Fast Forward

CQ-201B

45 – 95 g•cm

(0.62 – 1.32 oz•inch)

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)

 0dB = 0.775V

Adjustment Location : Mechanism deck

 0dB = 1 

µ

V

– 11 –

• Repeat the procedures in each adjustment several times, and 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

455kHz

AM FREQUENCY COVERAGE  ADJUSTMENT

Adjust for a maximum reading on level meter.

L4

520kHz

CT4

1,780kHz

AM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L3

620kHz

CT3

1,400kHz

FM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T1

10.7MHz

FM FREQUENCY COVERAGE  ADJUSTMENT

Adjust for a maximum reading on level meter.

L2

86.5MHz

CT2

109.5MHz

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L1

86.5MHz

CT1

109.5MHz

Adjustment Location : Main board (See page 13)

1. Connect the frequency counter to 4 and 7 pin of  IC 1 as

shown the figure below.

2. Turn the set to 98MHz.
3. Adjust RV1 for 76,000Hz reading frequency counter.

Standard Value : 75,950 – 76,050Hz

[ MAIN BOARD] (Conductor side)

Adjustment Location : Main board (See page 13)

µ

 

 

JW2

C

2

JW319

JW316

FB1

JW320

JW317

Q310

JW3

C1

R7

VCO

VCO

CF1

C22

C21

CF2

C15

L2

C6

C14

R5

R8

C2

C3

C

3

C13

C

1

T2

C9

JW1

IC1

R2

C121

C19

C1

T1

R6

JW

C18

JW318

R3

JW321

JW

JW71

2

JW323

 

 

 

 

 

 

1

5

10

15

16

20

25

30

B

C

E

[MAIN BOARD] 
(Conductor side)

frequency counter

33k

Ω

1

µ

F

– 12 –

How to put the set into CD Test Mode
1. Set the function switch to power off.
2. Set the function switch to CD while

l key and x key pressing.
The set is into CD test mode (88 is displayed).

3. Turn the power off to release test mode.

CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.

Focus Bias Check
1. Connect the oscilloscope between IC701 rj pin (RFO) and GND

on CD board.

2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the u button.
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.

•

RF Signal Reference Waveform (eye pattern)

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

IC701

C728

JW717

JW728

C733

R

CN701

C713

JW726

7

C725

C724

JW724

R732

R708

R740

714

R763

C716

R

741

C727

C732

C740

C704

717

R711

C721

C739

JW715

R723

R724

C743

9

R7

JW718

R702

R718

715

R709

12

R731

4

R701

C74

2

R706

C730

R704

C744

7

18

JW721

6

C714

C731

C702

R705

C73

4

C717

7

25

0

R734

R703

R765

R769

R721

C712

7

20

R739

JW704

R766

 

 

1

5

10

15

16

17

20

25

30

32

33

35

40

45

48

49

50

55

60

64

1

8

15

VC

B C E

oscilloscope

(AC range)

[MAIN BOARD] (Conductor side)

(GND)

IC701 pin 

rj

(RFO)