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13

4

two floating screws

     (+PTPWH M2.6)

3

two floating screws

     (+PTPWH M2.6)

1

floating screws

     (+PTPWH M2.6)

2

5

BU holder (BU-30)

7

two insulators

6

two insulators

base unit
(BU-30BD61S)

8

wire (flat type) 9p (CN105)

14

•

The cold reset clears all data including preset data stored in
the RAM to initial conditions. Execute this mode when re-
turning the set to the customer.

Procedure:
1. Press the "/1 button to turn off the main power.
2. While depressing the  x  button, press the "/1 button.
3. The fluorescent indicator tube does not display any message

and the set is reset.

•

Fluorescent segments are tested when this test is activated.

Procedure:
1. Extract an AC plug.
2. While depressing the  CD u  button, insert an AC plug.
3. All segments of the fluorescent indicator tube turn on.
4. CD test mode is activated.
5. To exit from this mode, press the "/1 button or disconnect the

power cord.

•

The model and the version are displayed.

Procedure:
1. Press the "/1 button to turn the set on.
2. To enter the test mode, press two buttons  x  and "/1 simulta-

neously for more than five seconds. The model and the ver-
sion are displayed.

•

This mode is used to check the function of the amplifier.

Procedure:
1. Extract an AC plug.
2. While depressing the [MD] button, insert an AC plug to enter

the AMP test mode. The message “AMP TEST” is displayed.

3. The message “Volume MAX” is displayed, when pressing the

[VOLUME +] button. The message “Volume MIN” is displayed,
when pressing the [VOLUME --] button.

4. Each time pressing the [PLAY MODE/TUNING MODE] button,

the message “EQ MAX”, “EQ MIN” or “EQ FLAT” is dis-
played in this order.

5. To release from this mode, disconnect the AC plug and turn

the power off.

•

Either the 9 kHz step or 10 kHz step can be selected for the
AM channel step.

Procedure:
1. Set the function to AM.
2. While depressing the [TUNER/BAND]  button, press the "/1

button.

3. The channel step is changed over.

Procedure:
1. Extract an AC plug.
2. While depressing the  TAPE nN  button, insert an AC plug.
3. The message “TC TEST” is displayed and TC test mode is

activated.

•

Zero Return

1. Press the + > M  or  – .m  button.
2. The tape is rewound to the counter zero position.
•

Automatic record/playback test

1. Press the [REC START/REC PAUSE] button.
2. The message “MD” is displayed and AUX input is selected.
3. The tape is rewound to the counter zero position and record-

ing is started automatically.

4. When the  x  button  is pressed, the tape is rewound to the

recording stated point and the set starts playback.

5. To exit from this mode, press the "/1 button or disconnect the

power cord.

15

3.04 – 6.96 mN • m

(31 to 71 g • cm)

(0.43 – 0.98 oz • inch)

0.20 – 0.58 mN • m

(2 to 6 g • cm)

(0.02 – 0.08 oz • inch)

3.04 – 6.96 mN • m

(31 to 71 g • cm)

(0.43 – 0.98 oz • inch)

0.20 – 0.58 mN • m

(2 to 6 g • cm)

(0.02 – 0.08 oz • inch)

6.97 – 14.02 mN • m

(71 to 143 g • cm)

(0.98 – 1.99 oz • inch)

9.8 mN • m or more

(100 g • cm or more)

(1.4 oz • inch or more)

9.8 mN • m or more

(100 g • cm or more)

(1.4 oz • inch or more)

CQ-102C

CQ-102C

CQ-102RC

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

1.

Clean the following parts with a denatured alcohol-moistened
swab:

record/playback heads

pinch rollers

erase head

rubber belts

capstan

idlers

2.

Demagnetize the record/playback head with a head demag-
netizer.

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.

FWD

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

16

Procedure:
1.

Mode : Playback

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 1 dB of peak.

test tape
P-4-A100
(10kHz, –10dB)

MAIN board
J203
speaker terminal

level meter

set

+

–

L-CH
peak

R-CH
peak

screw
position

output
level

within
1 dB

L-CH
peak

R-CH
peak

screw
position

within 1dB

P-4-A100

WS-48B

10 kHz, –10 dB

3 kHz, 0 dB

Azimuth Adjustment

Tape Speed Adjustment

1.

Demagnetize the record/playback head with a head demagnetizer.

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.

7.

Switches and controls should be set as follows unless otherwise
specified.

4.

After the adjustments, apply suitable locking compound to the
parts adjusted.

Adjustment Location: Record/Playback/Erase Head

Procedure:
1.

Turn the power on.

2.

Insert the WS-48B into deck.

3.

Press the  Y  button of deck.

4.

Check the reading of frequency counter becomes 3000 ± 90 Hz.

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

3.

Mode: Playback

test tape
P-4-A100
(10kHz, –10dB)

oscilloscope

set

Waveform of oscilloscope

in phase

45

°

90

°

135

°

180

°

good

wrong

MAIN board
J203
speaker terminal

L

R