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— 17 —

2

 Two screws 

     (BTP 2.6 

×

 8)

5

 Hang the 

     two belts.

4

 Removal the capstan motor 

     to direction of the arrow.

1

 Break the soldering of 

     motor lead.

3

 Claw

2

 Two rivets

3

 Break the soldering of two

     flexible flat cables.

1

 Connector

     (CN651)

4

 Four screws

    (BTP 2.6 

×

 4)

5

 Audio board

— 18 —

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 J0 V0”.  Each time a button is pressed, “K”value increases.
However, once a button is pressed, it is no longer taken into
account.
“J” Value increases like 1, 2, 3 ... if rotating
≠ AMS ± knob in “+”  direction, or it decreases like 0,
9, 8 ... if rotating in “–” direction.
“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 manner

as step 1, or disconnect the power cord.

•

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 vibration.
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. Pr ess three buttons GROOVE , ENTER/NEXT , and

FLASH simultaneously.

3. The Sled Servo mode is selected, if “CD” is flashing 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.

•

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.

— 19 —

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
sequence.

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 having

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
sequence:

Deck A (FWD) 

→

 Deck A (REV)

↑

↓

Deck B (REV) 

←

 Deck B (FWD)

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

fluorescent indicator tube is flashing.

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 the 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 Section”.

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

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
sequence:

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

respectively 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 aging

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.

— 20 —

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

demagnetizer.

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.

Mode

Torque Meter

Meter Reading

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)

Mode

Tension Meter

Meter Reading

Forward

CQ-403A

more than 100g (3.52 oz)

Reverse

CQ-403R

more than 100g (3.52 oz)

0dB=0.775V

1. Demagnetize the record/playback head with a head

demagnetizer.  (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 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.

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

ENTER/NEXT and

DISC 4

button.)

• Test Tape

Tape

Signal

Used for

P-4-A100

10kHz, –10 dB

Azimuth Adjustment

WS-48B

3kHz, 0dB

Tape Speed Adjustment

P-4-L300

315Hz, 0dB

Level Adjustment

  

Perform this adjustments for both decks

Procedure:
1. Mode:  Playback (FWD)

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)