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9

1

×

2

1

×

4

3

2

10

Mode

Tension Meter

Meter Reading

Forward

CQ-403A

5.89 mN•m

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.

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

Back Tension

CQ-102C

1.5 – 4 g•cm

(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

Back Tension

CQ-102RC

1.5 – 4 g•cm

(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)

This set have the test mode function. In the test mode, FM Auto
Seek/Stop Level and AM Auto Seek/Stop Level Check can be per-
formed easier than it in ordinary procedure.

<Set the Test Mode>
1. Turn ON the regulated power supply. (All LEDs on the set

lights up, and the clock is displayed.)

 Press the 

[OFF]

 button, if the clock is not displayed.

2. Push the presett 

[4]

 button.

3. Push the preset 

[5]

 button.

4. Press the preset 

[1]

 button for more than two seconds.

5. Then the display indicates all lights, the test mode is set.

<Release the Test mode>
Push the [OFF] button.

See the adjustment location from on page 13 for the
adjustment.

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 2 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

11

°

°

°

°

Ω

Ω

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.

Adjustment Location: PB head

See the adjustment location from on page 13 for the
adjustment.











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

reading on the speed checker or frequency counter becomes in
specification.

Specification: Constant speed

Adjustment Location: See page 13.

Speed checker

Frequency counter

–2 to +3%

2,940 to 3,090 Hz

Ω

12

Make this check after “FM Auto Seek/Stop Level Adjustment”.
Setting:

[SOURCE] t [MODE] button : AM
FREQUENCY SELECT switch: AM 9 k

Procedure:
1. Set to the test mode. (See page 10)
2. Push the [SOURCE] button and set to FM.
3. Push the [MODE] button and set to AM.

Display

4. Check that the “AM” indication turns to “AM0” indication on

the display window.

Display

Adjustment Location: See page 13.

µ

±

Ω

Ω

SHUF

SHUF

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.

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 13.

µ

Ω

SHUF

 0 dB=1 µV

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

[SOURCE] button

: FM

FREQUENCY SELECT switch : FM 50 k

Procedure:
1. Set to the test mode. (See page 10)
2. Push the [SOURCE] button and set to FM.

Display

3. Adjust with the volume RV2 on TU100 so that the “FM” indi-

cation turns to “FM0” indication on the display window.
But, in case of already indicated “FM0”, turn the RV2 so that
put  out light “0” indication and adjustment.

Display

Adjustment Location: See page 13.

[SOURCE] button

: FM

FREQUENCY SELECT switch : FM 50 k

µ

µ

SHUF

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