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13

1

main belt

4

sub belt (c)

2

screw
(PTP2 

×

 3)

A

2

screw
(PTP2 

×

 3)

2

screw
(PTP2 

×

 3)

2

screw
(PTP2 

×

 3)

3

Lift up the bottom BKT (TS)
in the direction of arrow 

A

(as far as the belt can be removed).

14

0 dB= 0.775 V

1. The adjustments should be performed in the order given in

this service manual.

2. The adjustments should be performed for both L-CH and

R-CH.

Procedure:
1. Put the set into the FWD PB mode.

2. Turn the screw and check the output peak value.  Adjust the

screw  so that the peak value in channels L and R coincides
within 3 dB.

3. Check the phase in the FWD PB mode.

4. Repeat the above adjustment for the REV PB mode.
5. Check that output level difference between FWD PB mode

and REV PB mode is within 4 dB.

Type

 Signal

 Used for

P-4-A063

6.3 kHz, –10 dB

head azimuth adjustment

WS-48A

3 kHz, 0 dB

tape speed adjustment

Ω

°

°

°

°

Ω

Ω

Mode

Tension Meter

Meter Reading

Forward

CQ-403A

more than 60 g

Reverse

CQ-403R

(more than 2.12 oz)

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

swab:

playback head

pinch roller

rubber belt

capstan

idler

2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the power supply

voltage (14.4 V) unless otherwise noted.

With this set, it is not necessary to apply suitable locking
compound to the parts after the azimuth adjustment.

Mode

Torque Meter

Meter Reading

2.46 – 5.39 mN•m

Forward

CQ-102C

(25 – 55 g•cm)

(0.35 – 0.76 oz•inch)

Forward

0.15 – 0.39 mN•m

CQ-102C

(1.5 – 4 g•cm)

Back Tension

(0.02 – 0.06 oz•inch)

2.46 – 5.39 mN•m

Reverse

CQ-102RC

(25 – 55 g•cm)

(0.35 – 0.76 oz•inch)

Reverse

0.15– 0.39 mN•m

CQ-102RC

(1.5 –

4 g•cm)

Back Tension

(0.02 – 0.06 oz•inch)

4.91 – 14.70 mN•m

FF, REW

CQ-201B

(50 – 150 g•cm)

(0.69 – 2.08 oz•inch)

15

Adjustment Location: PB head

Procedure:
1. Put the set into the FWD PB mode.
2. Adjust adjustment resistor for inside capstan motor so that the

reading on the frequency counter becomes in 3,015 Hz.

Specified Value: 2,940 to 3,090 Hz

Adjustment Location: See page 17.











Ω

0 dB=1 

µ

V

When the tuner unit is defective, replace it by a new one be-
cause its internal block is difficult to repair.

Adjust the tuner section in the sequence shown below.

1. FM Auto Seek/Stop Level Adjustment
2. FM Stereo Separation Adjustment
3. AM Auto Seek/Stop Level Check

[TUNER]

 button: FM

FREQUENCY SELECT switch (E and UK models): FM 50 K

Procedure:
1. Tune the set to 98.0 MHz (E and UK models) or 98.1 MHz

(US and canadian models).

2. Connect the digital voltmeter to TP (SD) on MAIN board.
3. Adjust RV2 on TU100 so that the reading on the digital volt-

meter changes point from low to high.

Adjustment Location: See page 17.

µ

Ω

Ω

µ







16

[TUNER]

 button: FM

FREQUENCY SELECT switch (E and UK models): FM 50 K

L-CH Stereo separation: A-B
R-CH Stereo separation: C-D
The separations of both channels should be equal.

Specification: Separation more than 26 dB

Adjustment Location: See page 17.

FM Stereo

Level meter

Level meter

signal generator

connection

reading (dB)

output channel

L-CH

L-CH

A

B

R-CH

L-CH

Adjust RV1 on TU100

for minimum reading.

R-CH

R-CH

C

D

L-CH

R-CH

Adjust RV1 on TU100

for minimum reading.

µ

Ω

[TUNER]

 button: AM

FREQUENCY SELECT switch (E and UK models): AM 9 K

Procedure:
1. Tune the set to 999 kHz (E and UK models) or 1000 kHz (US

and canadian models).

2. Connect the digital voltmeter to TP (SD) on MAIN board.
3. The reading on the digital voltmeter changes point from low

to high.

Adjustment Location: See page 17.

µ

±

Ω

Ω





