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— 8 —

2

 Screw

 

(+PTPWH 2.6 

×

 8) 

3

 UD-gear

4

 Screw

 

(+PTPWH 2.6 

×

 8) 

5

 UD-Cam

8

 Spring 

7

 Spring

6

 Spring 

1

 Two screws

 

(+KTP 3 

×

 8)

9

 Base unit

Four claws

Four claws

2

 Cassette lid (R)

1

 Cassette lid (L)

— 9 —

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.

Meter reading

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)

Torque

FWD

FWD

back tension

FF/REW

Torque meter

CQ-102C

CQ-102C

CQ-201B

1.

Demagnetize the record/playback head with a head
damagnetizer.

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

Tape

P-4-A100

WS-48B

Signal

10 kHz, –10 dB

3 kHz, 0 dB

Used for

Azimuth Adjustment

Tape Speed Adjustment

test tape
P-4-A100
(10kHz, –10dB)

SPEAKER
terminal (JK501)

level meter

+

–

set

— 10 —

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.

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 8)

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

Procedure:
1.

Mode: Playback

2.

Adjust the SFR201 so that the frequency counter reads 3,000
Hz ± 90Hz.

Adjustment Location: MAIN board

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

CN204

L-CH
peak

R-CH
peak

screw
position

output
level

within
2dB

within 2dB

L-CH
peak

screw
position

R-CH
peak

test tape
P-4-A100
(10kHz, –10dB)

SPEAKER
terminal (JK501)
(L-CH)

set

L

R

oscilloscope

SPEAKER
terminal (JK501)
(R-CH)

Waveform of oscilloscope

in phase

45˚

90˚

135˚

180˚

good

wrong

SPEAKER
terminal (JK501)

set

frequency counter

+
–

SFR201

Tape Speed

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

— 11 —

0 dB=1µV

Procedure:
1.

Set the reception frequency of the unit to 531 kHz.

2.

Adjust L108 for 1.2 ± 0.05 V reading on the DC voltmeter.

3.

Set the reception frequency of the unit to 1,602 kHz.

4.

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

Adjustment Location:  MAIN board (See page 12)

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 L107 so that when the waveform on the oscilloscope is
maximum, no noise appears.

4.

Tune the set to 1,400 kHz.

5.

Adjust TC101 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 12)

TP1

+

DC voltmeter

Main board

–

F
G
VT

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.