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– 17 –

[SHIFT]

 button

: ON (light up SET UP and

PLAY MODE)

Preset 

[3]

 (PLAY MODE) button : NR off

SOUND (BAS) button

: Center

SOUND (TRE) button

: Center

SOUND (BAL) button

: Center

SOUND (FAD) button

: Center

SOUND (VOL) button

: Maximum

Procedure:
1. Put the set into the FWD PB mode.
2. Adjust RV231 (L-CH) and RV241 (R-CH) so that the level

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

Adjustment Location: See page 20.

set

+
–

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

level meter

MAIN board

TP (DOLBY-L)/
TP (DOLBY-R)

      

 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 Stereo Separation Adjustment
3. FM RDS S-Meter Adjustment
4. MW Auto Scan/Stop Level Adjustment

[SOURCE]

 button: FM

Procedure:
1. Set to the test mode. (See page 16.)
2. Push the 

[SOURCE]

 button and set to FM.

Display

3. Adjust with the volume RV2 on TU10 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 20.

set

antenna jack (J10)

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

REG

SHUF1

REG

SHUF1

– 18 –

[SOURCE]

 button: FM

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 20.

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 TU10

for minimum reading.

R-CH

R-CH

C

D

L-CH

R-CH

Adjust RV4 on TU10

for minimum reading.

FM RF signal

generator

Carrier frequency : 98.0 MHz
Output level

: 70 dB (3.2 mV)

Mode

: stereo

Modulation

: main : 1 kHz, 20 kHz deviation (26.5%)
  sub : 1 kHz, 20 kHz deviation (26.5%)

:

 19 kHz pilot: 7.5 kHz deviation (10%)

0.01 

µ

F

set

antenna jack (J10)

+
–

speaker out terminal

level meter

4 

Ω

[SOURCE]

button: FM

Procedure :
1. Set to the test mode. (See page 16.)
2. Push the  

[SOURCE]

button and set to FM.

Display

3. Push the preset  

[10]

  button.

4. Adjust RV110 on MAIN board so that the display indication

is “16.0”.

Display

Specification : Display indication : 15.8 to 16.2.

Adjustment Location : See page 20.

set

antenna jack (J10)

FM RF signal

generator

Carrier frequency

: 98.00 MHz

Output level

: 35 dB (56.2 

µ

V)

Mode

: mono

Modulation

: no modulation

0.01 

µ

F

REG

SHUF1

REG

SHUF1

– 19 –

[SOURCE]

 

→

 

[MODE]

 button: MW

Procedure:
1. Set to the test mode. (See page 16.)
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 TU10 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 20.

REG

TP

SHUF1

REG

TP

SHUF1

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 (J10)

– 20 –

R-CH

L-CH

TP (DOLBY)
Dolby Level
Adjustment

– SET BOTTOM VIEW – 

TU10

Tape Speed Adjustment

– SET UPPER VIEW –

RV1 MW Auto Scan/Stop Level Adjustment

RV4 FM Stereo Separation Adjustment

RV2 FM Auto Scan/Stop Level Adjustment

RV241

(R-CH)

RV231
(L-CH)

Dolby Level

Adjustment

RV110 FM RDS S-Meter Adjustment