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– 29 –

3

claw

2

two screws
(BTP 2.6 

×

 8)

4

Removal the capstan motor
to direction of the arrow.

1

Break the soldering of
motor lead.

1

connector
(CN651)

2

two rivets

3

Break the soldering of two
flexible flat cables.

4

four screws
(BTP 2.6 

×

 4)

5

MD board

5

Hang the
two belts.

– 30 –

•

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

Procedure:
1. Press three buttons GROOVE , ENTER/NEXT , and

DISC 1 simultaneously.

2. The fluorescent indicator tube becomes blank instantaneously,

and the set is reset.

•

This mode moves the pickup to the position durable to vibra-
tion. Use this mode when returning the set to the customer after
repair.

Procedure:
1. Press POWER button to turn the set ON.
2. Press PLAY MODE button and POWER button simulta-

neously.

3. A message “LOCK” is displayed on the fluorescent indicator

tube, and the CD delivery mode is set.

•

This mode resets the set with the preset data kept stored in the
memory.  The hot reset mode functions same as if the power
cord is plugged in and out.

Procedure:
1. Press three buttons GROOVE , ENTER/NEXT , and

DISC 2 simultaneously.

2. The fluorescent indicator tube becomes blank instantaneously,

and the set is reset.

•

This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the pickup.

Procedure:
1. Select the function “CD”.
2. Press three buttons GROOVE , ENTER/NEXT , and

FLASH simultaneously.

3. The Sled Servo mode is selected, if “CD” is blanking on the

fluorescent indicator tube.

4. With the CD in stop status, press

) button in CD section

to move the pickup to outside track, or

0 button to inside

track.

5. To exit from this mode, perform as follows:

1) Move the pickup to the most inside track.
2) Press three buttons in the same manner as step 2.

•

Always move the pickup to most inside track when exiting from
this mode.  Otherwise, a disc will not be unloaded.

•

Do not run the sled motor excessively, otherwise the gear can
be chipped.

•

The FUNCTION name of external input terminal can be changed
over to VIDEO or MD. With the FUNCTION selected to “MD”,
about 5dB mute is applied to the input gain.

Procedure:
1. Press POWER button to turn the set OFF.
2. Press POWER button together with FUNCTION button, and

the power is turned on, the display of fluorescent indicator
tube changes to “MD” or “VIDEO” instantaneously, and thus
the FUNCTION is changed over.

•

A step of AM channels can be changed over between 9kHz and
10kHz.

Procedure:
1. Press POWER button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND

button to select the BAND “AM”.

3. Press POWER button to turn the set OFF.
4. Press ENTER/NEXT and POWER buttons simultaneously,

and the display of  fluorescent indicator tube changes to “AM
9k STEP” or “AM 10k STEP”, and thus the channel step is
changed over.

Procedure:
1. Press three buttons GROOVE , ENTER/NEXT , and DISC 3

simultaneously.

2. LEDs and fluorescent indicator tube are all turned on.

Press DISC 2 button, and the key check mode is activated.

3. In the key check mode, the fluorescent indicator tube displays

“K 1 V0 J0”.  Each time a button is pressed, “K”value in-
creases. However, once a button is pressed, it is no longer taken
into account.
“J” Value increases like 1, 2, 3 ... if rotating JOG knob in “+”
direction, or it decreases like 0, 9, 8 ... if rotating in “–” direc-
tion.
“V” Value increases like 1, 2, 3 ... if rotating VOLUME knob
in “+”  direction, or it decreases like 0, 9, 8 ... if rotating in “–
” direction.

4. To exit from this mode, press three buttons in the same man-

ner as step 1, or disconnect the power cord.

– 31 –

This mode can be used for operation check of CD section and tape
deck section.

•

If an error occurred:

The aging operation stops.

•

If no error occurs:

The aging operation continues repeatedly.

1. Aging Mode in CD Section
1-1.  Operating Method of Aging Mode

1. Set discs in DISC 1 and DISC 3 trays.
2. Select the function “CD”.
3. Press three buttons GROOVE , ENTER/NEXT , and

DISC 5 simultaneously.

4. The aging mode is activated, if a roulette mark on the fluo-

rescent indicator tube is blinking.

5. In the aging mode, the aging is executed in a sequence

given in “1-2. Operation during Aging Mode”.
The aging continues unless an alarm occurred.

6. To exit from the aging mode, press POWER button to turn

the set OFF.

•

If a button other than buttons In CD section is pressed during
aging, the aging in the CD section is finished.

•

To execute aging to the tape deck section successively, press

·

button in the deck A.
“AGING” is displayed on the fluorescent indicator tube.  (For
the aging in tape deck, see “2. Aging Mode in Tape Deck Sec-
tion”.

1-2.  Operation during aging Mode
In the aging mode, the program is executed in the following se-
quence.

1. The disc tray turns to select a disc. (For a disc selection

sequence, see Section 1-3.)

2. TOC of disc is read.
3. The pickup accesses to the last track.
4. Steps 1 through 3 are repeated.

1-3.  Disc Selection Sequence

•

During the aging mode, discs are selected in the following se-
quence:

Disc 1 

→

 Disc 3

 

↑

↓

Disc 3 

←

 Disc 1

2. Aging Mode in Tape Deck Section
2-1.  Operating Method of Aging Mode

1. Load a commercially available 10-minute tape into the

decks A and B respectively.

(If a 10-minute tape is not available, another tape may be

used but a cycle time will be longer.)

2. Select the function “TAPE”.
3. Rewind tapes in advance by pressing

0 button respec-

tively on decks A and B.

4. Press three buttons GROOVE , ENTER/NEXT , and

DISC 5  simultaneously.

5. Press

· button on deck A.  (This button triggers the ag-

ing mode.)

6. The aging mode is activated if “AGING A” is displayed on

the fluorescent indicator tube.

7. In the aging mode, the aging is executed in a sequence

given in “2-2.  Operation during Aging Mode”.

The aging continues unless an alarm occurred.

8. To exit from the aging mode, press POWER button to turn

the set OFF.

2-2.  Operation during Aging Mode
In the aging mode, the program is executed in the following se-
quence.

1. A tape on FWD side is played for one minute.
2. PAUSE STOP is made.
3. Recording is made for 3 minutes. (For the deck not having

the record function, the play is executed.)

4. FF is executed up to the end of tape.
5. A tape is reversed, and the tape on REV side is played for

one minute.

6. PAUSE STOP is made.
7. Recording is made for 3 minutes.  (For the deck not hav-

ing the record function, the play is executed.)

8. FF is executed up to the end of tape.
9. Steps 1 through 8 are executed for the other deck.
10. Steps 1 through 9 are repeated unless an alarm occurred.

2-3.  Deck Selection Sequence

•

During the aging mode, decks are selected in the following se-
quence:

Deck A (FWD) 

→

 Deck A (REV)

↑

↓

Deck B (REV) 

←

 Deck B (FWD)

– 32 –

Forward

CQ-403A

more than 100 g (3.52 oz)

Reverse

CQ-403R

more than 100 g (3.52 oz)

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

swab:

record/playback head

pinch roller

erase head

rubber belts

capstan

idlers

2. Demagnetize the record/playback head with a head demagne-

tizer.

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.

Forward

CQ-102C

36 to 61g•cm

(0.50 – 0.84 oz•inch)

Forward

CQ-102C

2 to 6g•cm

Back Tension

(0.026 – 0.082 oz•inch)

Reverse

CQ-102RC

36 to 61g•cm

(0.50 – 0.84 oz•inch)

Reverse

CQ-102RC

2 to 6g•cm

Back Tension

(0.026 – 0.082 oz•inch)

FF, REW

CQ-201B

61 to 143g•cm

(0.85 – 1.98 oz•inch)

DECK  SECTION

0 dB=0.775 V

1. Demagnetize the record/playback head with a head demagne-

tizer.  (Do not bring the head demagnetizer close to the erase
head.)

2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the

parts adjust.

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 ad-
justment 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 other-

wise specified.

8. Set to test mode.  (Press key switch same time

GROOVE

ENTER/NEXT

and

DISC 4

button.)

•

P-4-A100

10 kHz, –10 dB

Azimuth Adjustment

WS-48B

3 kHz, 0 dB

Tape Speed Adjustment

P-4-L300

315 Hz, 0 dB

Level Adjustment

set

main board
CN207
Pin 

1

 (L-CH)

Pin 

3

 (R-CH)

main board
CN207
Pin 

2

 

+
–

level meter

test tape
P-4-A100
(10KHz, –10dB)

Note:  Perform this adjustments for both decks
Procedure: