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– 17 –

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. Push the SOURCE button, the test mode is set.

display

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

swab:

playback head

pinch roller

rubber belt

capstan

idler

2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the power supply

voltage (14.4V) unless otherwise noted.

•

Forward

CQ-403A

more than 60 g

Reverse

CQ-403R

(more than 2.12 oz)

•

Forward

CQ-102C

35–65 g•cm

(0.49–0.90 oz•inch)

Forward

CQ-102C

0.5–5.0 g•cm

Back Tension

(0.01–0.07 oz•inch)

Reverse

CQ-102RC

35–65 g•cm

(0.49–0.90 oz•inch)

Reverse

CQ-102RC

0.5–5.0 g•cm

Back Tension

(0.01–0.07 oz•inch)

FF, REW

CQ-201B

60–200 g•cm

(0.83–2.78 oz•inch)

FM

 

98.0

SHUF1

<Release the Test mode>
1. Push the “OFF” button.

– 18 –

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

SOURCE button: FM

See the adjustment location from on page 21 for the
adjustment.

Procedure:
1. Put the set into the FWD PB mode.

–1.5 to +2.5%

2,955 to 3,075 Hz

Specification: Constant speed

Adjustment Location: See page 21.

Preset 3 (DOLBY) button

: OFF

SEL (BAS) button

: Center

SEL (TRE) button

: Center

SEL (BAL) button

: Center

SEL (FAD) button

: Center

SEL (VOL) button

: Maximum

D-BASS control

: OFF

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

LINE OUT

set

FM RF signal

generator

antenna jack

0.01 µF

Carrier frequency : 98.0 MHz
Output level

: 20 dB (10.0 µV)

Mode

: mono

Modulation

: 1 kHz, 22.5 kHz deviation (30%)

Procedure:
1. Set to the test mode. (See page 17).

Display

10 k

 

Ω

set

+

–

speed checker

or

frequency counter

Procedure:
1. Put the set into the FWD PB mode.
2. Adjust RV121 (L-CH) and RV221 (R-CH) so that the level

meter reading is –6 ± 0.5 dB (0.37 to 0.41 V).

Adjustment Location: See page 21.

main board

 



L-CH: TP101 (DOLBY-L)
R-CH: TP201 (DOLBY-R)

set

+
–

level meter

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

FM

 

98.0

SHUF1

2. Push the preset 3 button.

Display

3. Adjust with the volume RV2 on TU1 so that the “FM” indica-

tion 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 21.

 

98.0

3

SHUF1

FM

 

98.0

3

SHUF1

FM

– 19 –

SOURCE button: FM

SOURCE and MODE button: MW

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 21.

FM RF signal

generator

set

+
–

level meter

antenna jack

10 k

 

Ω

LINE OUT

Carrier frequency : 98.0 MHz
Output level

: 70 dB (3.2 mV)

Mode

: stereo

Modulation

: main: 1 kHz, 33.75 kHz deviation (45%)
  sub: 1 kHz, 33.75 kHz deviation (45%)
  19 kHz pilot: 7.5 kHz deviation (10%)

L-CH

L-CH

A

B

R-CH

L-CH

Adjust RV4 on TU1

for minimum reading.

R-CH

R-CH

C

D

L-CH

R-CH

Adjust RV4 on TU1

for minimum reading.

AM RF signal

generator

set

30 

Ω

15 pF

65 pF

AM dummy antenna
(50 

Ω

)

antenna jack

Carrier frequency : 999 kHz
30% amplitude
modukation by
1 kHz signal
Output level

: 33 dB (44.7 µV)

999

 

SHUF1

MW

4. Adjust with the volume RV1 on TU1 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 21.

3. Push the preset 3 button.

Display

Procedure:
1. Set to the test mode. (See page 17.)
2. Push the MODE button and set to MW.

Display

999

3

SHUF1

MW

3

999

SHUF1

MW

– 20 –

SOURCE  button: FM

SOURCE  button: FM

set

FM RF signal

generator

antenna jack

Carrier frequency : 69.5 MHz (FM2: 3CH)
Output level

: 60 dB (1 mV)

    

TP401 (VCO)

main board

frequency counter

+

–

Procedure:
1. Connect the frequency counter to the TP401 (VCO) on main

board.

2. Adjust RV402 so that the reading on the frequency counter

becomes to 31.25 ± 0.1 kHz.

Adjustment Location: See page 21.

set

FM RF signal

generator

antenna jack

Carrier frequency : 69.5 MHz (FM2: 3CH)
Output level

: 60 dB (1 mV)

Procedure:
1. Connect the level meter to the TP402 (PLT) on main board.
2. Set the modulation frequency of the FM RF signal generator

to 1 kHz (10 kHz div.)

3. Then output level is supposing that 0 dB.
4. Set the modulation frequency of the FM RF signal generator

to 31.25 kHz (10 kHz div.).

5. Adjust L401 so tha the reading on the level meter becomes to

maximum.

6. Adjust RV401 so that the reading on the level meter becomes

to 13.0 ± 0.5 dB.

Adjustment Location: See page 21.

    

TP402 (PLT)

main board

level meter

+

–