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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

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 12.











frequency counter

test tape 
WS-48A
(3 kHz, 0 dB)

set

speaker out terminal

–

+

4 

Ω

0 dB=1 µV

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 Scan/Stop Level Adjustment
2. FM Noise Focus Adjustment
3. FM Stereo Separation Adjustment
4. FM Signal Meter Adjustment
5. MW Auto Scan/Stop Level Adjustment

[TUNER]

 button: FM 1

Procedure:
1. Tune the set to 98.0 MHz.
2. Connect the digital voltmeter to TP101 (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 12.

µ

Ω

Ω











10

[TUNER]

 button: FM1

Procedure:
1. Press 

[OFF]

 button to turn the set OFF.

2. Press 

[4]

 button and 

[5]

 button.

3. Press and hold 

[1]

 button for 3 to 4 seconds.

4. Press 

[TUNER]

 button for 2 to 3 times.

Display

5. Press 

[6]

 button, the test mode is set.

6. Adjust RV100 so that the display indication is “118”.

Display

Specified Value: Display indication: 116 to 120

Adjustment Location: See page 12.

[TUNER]

 button: FM1

Procedure:
1. Tune the 98.0 MHz.
2. The then output level is supposing that (A) dB.
3. Adjust with the volume RV3 on TU100 so that the output level

is (A) –31 dB then signal generator input set to –20 dB.

Adjustment Location: See page 12.

[TUNER]

 button: FM1

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

Specified Value: Separation more than 26 dB

Adjustment Location: See page 12.

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 TU100

for minimum reading.

R-CH

R-CH

C

D

L-CH

R-CH

Adjust RV4 on TU100

for minimum reading.

µ

Ω

µ

Ω 

µ

µ

FM

AMS

REG

FM

AMS

REG

11

[TUNER]

 button: MW

Procedure:
1. Tune the set to 999 kHz
2. Connect the digital voltmeter to TP101 (SD) on MAIN board.
3. Adjust RV1 on TU100 so that the reading on the digital volt-

meter changes point from low to high.

Adjustment Location:  See page 12.

µ

Ω

Ω











12

– SET BOTTOM VIEW –

– SET UPPER VIEW –