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— 11 —

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

swab:
record/playback head

pinch rollers

erase head

rubber belts

capstan

idlers

2. Demagnetize the record/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 rated power

supply voltage unless otherwise noted.

40 to 70 g • cm

(0.56 - 0.97 oz • inch)

1 to 5 g • cm

(0.01 - 0.07 oz • inch)

55 to 140 g • cm

(0.76 - 1.94 oz • inch)

FWD

FWD

back tension

FF/REW

CQ-102C

CQ-102C

CQ-201B

1.

Demagnetize the record/playback head with a head
demagnetizer.

2.

Do not use a magnetized screwdriver for the adjustments.

3.

After the adjustments, apply suitable locking compound to the
parts adjusted.

4.

The adjustments should be performed with the rated power
supply voltage unless otherwise noted.

5.

The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)

6.

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

Note: Perform this adjustments for both decks.

Procedure:
1.

Mode : Playback

2.

Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 2 dB of peak.

P-4-A100

WS-48B

10 kHz, –10 dB

3 kHz, 0 dB

Azimuth Adjustment

Tape Speed Adjustment

test tape
P-4-A100
(10kHz, –10dB)

set

SPEAKER
terminal (JK501)

level meter

L-CH
peak

R-CH
peak

screw
position

output
level

within
2dB

L-CH
peak

R-CH
peak

screw
position

within 2dB

— 12 —

3.

Mode: Playback

4.

After the adjustments, apply suitable locking compound to the
parts adjusted.

Adjustment Location:
Remove the cassette lid before adjustment (See page 9)

Procedure:
1.

Mode: Playback

2.

Adjust the SFR251 so that the frequency counter reads 3,000
Hz ± 90Hz.

Adjustment Location: MAIN board

W. RMS (JIS) within 0.3%
(test tape: WS-48B)

test tape
P-4-A100
(10kHz, –10dB)

SPEAKER
terminal (JK501)
(L-CH)

SPEAKER
terminal (JK501)
(R-CH)

oscilloscope

L

R

Waveform of oscilloscope

in phase

45˚

90˚

135˚

180˚

good

wrong

Adjustment screws
REC/PB head (deck B)
or PB head (deck A)

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

set

SPEAKER
terminal (JK501)

frequency counter

+
–

Tape Speed

CN251

CN601

SFR251

— 13 —

0 dB=1µV

Procedure:
1.

Set the reception frequency of the unit to 530 kHz.

2.

Adjust L105 for 1.2 ± 0.05 V reading on the DC voltmeter.

3.

Set the reception frequency of the unit to 1,710 kHz.

4.

Confirm that the voltage reading on the DC voltmeter is within
8.0 ± 0.5 V.

Adjustment Location:  MAIN board (See page 14)

Procedure:
1.

Tune the set to 600 kHz.

2.

Set the output of AM RF SSG so that the input level of the set
will become 60 dB (µV/m).

3.

Adjust L104 so that when the waveform on the oscilloscope is
maximum, no noise appears.

4.

Tune the set to 1,400 kHz.

Main board

TP1

G
VT

DC voltmeter

+

–

AM RF  SSG

loop antenna

set

loop antenna
(Supplied accessories)

60 cm

AM ANTENNA
terminal (TM1)

30% amplitude
modulation by
400 Hz signal

Field strength dB (

µ

V/m) =SSG output level dB (

µ

V/m) –26 dB.

5.

Adjust TC102 so that when the waveform on the oscilloscope
is maximum, no noise appears.

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

tracking adjustment should be finally done by the trimmer
capacitors.

Adjustment Location: MAIN board (See page 14)

— 14 —

Procedure:
1.

Supply a 28 dB 98 MHz signal from the ANTENNA terminal.

2.

Tune the set to 98 MHz.

3.

Adjust SFR101 to the point (moment) when the TUNED
indicator will change from going off to going on.

Adjustment Location: MAIN board

FM RF SSG

75 

Ω

 coaxial

Carrier frequency : 98 MHz
Modulation           : AUDIO 1 kHz, 75 kHz
                              deviation (100%)
Output level          : 28 dB  (at 75 W open)

FM ANTENNA terminal
(JK101)

set

L104

TC102

TP1

SFR101

L105

FM Tuned Level

AM Tuning Voltage

AM Tracking

JK101