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– 13 –

2

guide (C)

1

three claws

two precision screws
(P2 

×

 2)

capstan/reel motor
(M901)

30˚

– 14 –

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

swab:

playback head

pinch roller

rubber belt

capstan

idlers

2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the

parts adjusted.

5. The adjustments should be performed with the power supply

voltage unless otherwise noted.

•

Mode

Tension Meter

Meter Reading

Forward

CQ-403A

more than 90 g

(more than 3.18 oz)

Reverse

CQ-403R

more than 90 g

(more than 3.18 oz)

•

Mode

Torque Meter

Meter Reading

Forward

CQ-102C

30 – 65 g•cm

(0.42 – 0.90 oz•inch)

Forward

CQ-102C

0.5 – 4.5 g•cm

Back Tension

(0.01 – 0.06 oz•inch)

Reverse

CQ-102RC

30 – 65 g•cm

(0.42 – 0.90 oz•inch)

Reverse

CQ-102RC

0.5 – 4.5 g•cm

Back Tension

(0.01 – 0.06 oz•inch)

FF, REW

CQ-201B

60 – 200 g•cm

(0.83 – 2.78 oz•inch)

This set have the test mode function. In the test mode, FM Auto
Scan/Stop Level and MW Auto Scan/Stop Level adjustments can
be performed easier than it in ordinary procedure.

<Set the Test Mode>
1. Set the “power select” switch (S501) is “A (ON)” position.
2. 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.

3. Push the preset 

[4]

 button.

4. Push the preset 

[5]

 button.

5. Press the preset 

[1]

 button for more than two seconds.

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

<Release the Test mode>
1. Push the 

[OFF]

 button.

2. Return the “power select” switch (S501) to initially set posi-

tion.

See the adjustment location from on page 17 for the
adjustment.

0 dB=0.775 V

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 17.

set

+

–

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

AUDIO OUT REAR jack (J331) 

10 k

Ω

speed checker

or

frequency counter

Speed checker

Frequency counter

–1.5 to +2.5%

2,955 to 3,075 Hz

– 15 –

[SHIFT]

 button

: ON

Preset 

[3]

 (PLAY MODE) and

[4]

(

→

) buttons

: NR OFF

set

+
–

test tape
P-4-D400
(400Hz, 0dB)

MAIN board

level meter

MAIN board

TP (GND)







L-CH: TP (DOLBY-L)
R-CH: TP (DOLBY-R)

 0 dB=1 µV

Adjust the tuner section in the sequence shown below.

1. FM Auto Scan/Stop Level Adjustment
2. FM Stereo Separation Adjustment
3. MW Auto Scan/Stop Level Adjustment

[SOURCE]

 button: FM

FM RF signal

generator

Carrier frequency

: 98.0 MHz

Output level

: 22 dB (12.6 

µ

V)

Mode

: mono

Modulation

: 1 kHz, 22.5 kHz deviation (30%)

0.01 

µ

F

set

antenna jack (J1)

SHUF

SHUF

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

Procedure:
1. Set to the test mode. (See page 14)
2. Push the 

[SOURCE]

 button and set to FM.

Display

3. Adjust with the volume RV2 on TU1 so that the “FM” indica-

tion 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 17.

Procedure:
1. Put the set into the FWD PB mode.
2. Adjust RV101 (L-CH) and RV201 (R-CH) so that the level

meter reading is –6±1 dB (0.35 to 0.44 V).

Adjustment Location: See page 17.

– 16 –

[SOURCE]

 button: FM

FM Stereo

Level meter

Level meter

signal generator

connection

reading (dB)

output channel

L-CH

L-CH

A

B

R-CH

L-CH

Adjust RV4 on TU1

for minimum reading.

R-CH

R-CH

C

D

L-CH

R-CH

Adjust RV4 on TU1

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 30 dB

Adjustment Location: See page 17.

FM RF signal

generator

Carrier frequency : 98.0 MHz
Output level

: 70 dB (3.2 mV)

Mode

: stereo

Modulation

: main: 1 kHz, 33.75 kHz deviation (45%)
  sub: 1 kHz, 33.75 kHz deviation (45%)

:

 19 kHz pilot: 7.5 kHz deviation (10%)

0.01 

µ

F

set

antenna jack (J1)

+
–

AUDIO OUT REAR jack (J331)

level meter

10 k

Ω

Make this adjustment after “FM Auto Scan/Stop Level Adjust-
ment”.
Setting:

[SOURCE]

 button: MW

Procedure:
1. Set to the test mode. (See page 14)
2. Push the 

[SOURCE]

 button and set to FM.

3. Push the 

[MODE]

 button and set to MW.

Display

4. Adjust with the volume RV1 on TU1 so that the “MW” indi-

cation turns to “MW0” indication on the display window.
But, in case of already indicated “MW0”, turn the RV1 so that
put out light “0” indication and adjustment.

Display

Adjustment Location: See page 17.

AM RF signal

generator

Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
Output level

: 33 dB (44.7 

µ

V)

(50 

Ω

)

set

AM dummy antenna

30 

Ω

15 pF

65 pF

antenna jack (J1)

SHUF

SHUF