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– 17 –

1

 P 2x3

2

 sled motor assy

3

 optical pick-up block

7

 chassis (OP) (O/S) assy

9

 compression spring (FL)

5

 Fit lever (D) in the

     direction of the arrow.

3

 damper (T)

4

 damper (T)

6

 Turn loading ring in the

     direction of the arrow.

1

 tension spring (angle)

8

 compression spring (FL)

2

 tension spring (KR1)

– 18 –

FM RF signal

generator

0.01 

µ

F

antenna
terminal

set

Carrier frequency : 98.00 MHz
Output level

: 22 dB (12.6 

µ

V)

Mode

: mono

Modulation

: 1 kHz, 22.5 kHz deviation (30%)

Procedure :
1. Set to the test mode.
2. Push the  SOURCE  button and set to FM.

Display

D-BASS switch : OFF
SOURCE button : FM

3. Push the preset  3  button.

Display

µ

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

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 “OFF” mode.
2. Push the preset  4  button.
3. Push the preset  5  button.
4. Press the preset  1  button for more than two seconds.
5. Then the display indicates all lights, the test mode is set.

<Release the Test Mode>
1. Push the  OFF  button.

The adjustments of tuner section, should be performed according
to the following sequence.
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

4. Adjust with the volume RV2 on TU601 so that the “FM”

indication 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.

– 19 –

FM RF signal

generator

0.01 

µ

F

antenna
terminal

set

+

–

FM RF signal

generator

0.01 

µ

F

antenna
terminal

set

LINE OUT REAR

10 k 

Ω

level meter

D-BASS switch : OFF
SOURCE button : FM

Carrier frequency : 98.00 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%)

L-CH

L-CH

A

B

R-CH

L-CH

Adjust RV4 on TU601
for nimum reading.

R-CH

R-CH

C

D

L-CH

R-CH

Adjust RV4 on TU601
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 28 dB

Adjustment Location : See page 20.

Carrier frequency : 98.00 MHz
Output level

: 35 dB (56.2 

µ

V)

Mode

: mono

Modulation

: no modulation

Procedure :
1. Set to the test mode. (See page 18.)
2. Push the  SOURCE  button and set to FM.

Display

D-BASS switch : OFF
SOURCE button : FM

3. Push the preset  10  button.
4. Adjust RV801 so that the display indication is “16.0”.

Display

Specification : Display indication : 15.8 to 16.2

Adjustment Location : See page 20.

– 20 –

AM RF signal

generator

AM dummy

antenna (50 

Ω

)

set

antenna
terminal

30 

Ω

15 pF

65 pF

TU601

RV1

MW AUTO SCAN/

STOP LEVEL ADJ

RV2

FM AUTO SCAN/

STOP LEVEL ADJ

RV801

FM RDS

S-METER ADJ

RV4

FM STEREO

SEPARATION ADJ

(NARROW)

D-BASS switch

: OFF

SOURCE 

n MODE button : MW

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

: 33 dB (44.7 

µ

V)

Procedure :
1. Set to the test mode. (See page 18.)
2. Push the  SOURCE  button.
3. Push the  MODE  button and set to MW.

Display

4. Push the preset  3  button.

Display

5. Adjust with the volume RV1 on TU601 so that the “MW”

indication 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 : tuner unit (TU601)

Adjustment Location : tuner unit (TU601)