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– 29 –

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.  In this case,

·

LED does not light up.)

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.  In this case,

ª

LED does not light up.)

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)

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 DISC1 and DISC2 trays.
2. Select the function “CD”.
3. Press three buttons SPECTRUM ANALYZER ,

ENTER/NEXT , and KARAOKE PON/MPX  simulta-

neously.

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 Section”.

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

1. The disc table is ejected.
2. The disc tray turns to select a disc. (For a disc selection

sequence, see Section 1-3.)

3. TOC of disc is read.
4. The pickup accesses to the last track.
5. A disc is ejected.
6. Steps 2 through 5 are repeated.

1-3.  Disc Selection Sequence

•

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

Disc 1 

→

 Disc 2

 

↑

↓

Disc 2 

←

 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 SPECTRUM  ANALYZER ,

ENTER/NEXT , and KARAOKE PON/MPX  simulta-

neously.

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.

– 30 –

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  sup-

ply voltage unless otherwise noted.

Forward

CQ-102C

36 to 61 g•cm

(0.50 – 0.84 oz•inch)

Forward

CQ-102C

2 to 6 g•cm

Back Tension

(0.026 – 0.082 oz•inch)

Reverse

CQ-102RC

36 to 61 g•cm

(0.50 – 0.84 oz•inch)

Reverse

CQ-102RC

2 to 6 g•cm

Back Tension

(0.026 – 0.082 oz•inch)

FF, REW

CQ-201B

61 to 143 g•cm

(0.85 – 1.98 oz•inch)

Forward

CQ-403A

more than 100 g (3.53 oz)

Reverse

CQ-403R

more than 100 g (3.53 oz)

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 sup-

ply 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 ad-
justment.)

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

SPECTRUM ANALYZER   ENTER/NEXT and
EFFECT ON/OFF button.)

•

Test Tape

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

Note:  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
(10 kHz, –10 dB)

– 31 –

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 1dB of peak.

3. Mode:  Playback (FWD)

4. Repeat steps 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the

pats adjusted.

Adjustment Location:  Record/Playback Head (Deck A and B)

and main board.

reverse

forward

Note: Start the Tape Speed adjustment as below after setting to the

test mode.
In the test mode, the tape speed is high during pressing the
 HIGH SPEED DUBBING button.

Procedure:
1. Turn the power switch on.
2. Press the SPECTRUM ANALYZER button,

ENTER/NEXT button and EFFECT ON/OFF button simul-

taneously.
To exit from the test mode, press the POWER button.

Mode:  Playback (FWD)

Screw
position

L-CH
peak

within
1dB

output
level

L-CH
peak

R-CH
peak

within
1dB

Screw
position

R-CH
peak

main
board
CN207
set

test tape
P-4-A100
(10 kHz, –10 dB)

pin 

3

oscilloscope

 L-CH

R-CH

V

H

waveform of oscilloscope

in phase 45

°

90

°

135

°

180

°

good

wrong

pin 

2

pin 

1

L

R

+
–

set

test tape
WS-48B 
(3 kHz, 0 dB)

main board
CN207 (Pin 

1

 : L-CH)

     (Pin 

3

 :R-CH)

frequency counter

1. Insert the WS-48B into the deck A and the blank tape into the

deck B.

2. Press the REC button and

· button on the deck B.  Then

the deck B is at recording mode.

3. Set the deck A to playback mode.
4. Keep pressing the HIGH SPEED DUBBING button in play-

back mode.
Then at HIGH speed mode.

5. Adjust RV652 on the AUDIO board do that frequency counter

reads 6,000 ± 60 Hz.

6. Take off the HIGH SPEED DUBBING button.

Then at NORMAL speed mode.

7. Adjust RV651 on the AUDIO  board so that frequency counter

reads 3,000      Hz.

8. Frequency difference between deck A and deck B the beginning

of the tape should be within ± 1.5%.

Adjustment Location:  AUDIO board

+30
–10

Procedure:
Mode:  Playback (FWD)

Deck A is RV311 (L-CH) and RV411 (R-CH), Deck B is RV301 (L-
CH) and RV401 (R-CH) so that adjustment within adjustment level
as follows.
Adjustment Level:

CN207 PB level:  301.5 to 338.3 mV (–8.2 to  –7.2 dB) level
difference between the channels:  within ±0.5 dB

Adjustment Location:  AUDIO and main boards

+
–

set

test tape
P-4-L300
(315 Hz, 0 dB)

main board
CN207 (Pin 

1

: L-CH)

(Pin 

3

: R-CH)

level meter

– 32 –

Procedure:
1. Mode:  Record

2. Mode:  Playback

+
–

set

recorded
portion

CN207 (Pin 

1

: L-CH)

(Pin 

3

: R-CH)

level meter

Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV341 (L-CH)
and RV441 (R-CH) on the AUDIO board to repeat steps 1 and 2.
Adjustable limits: Playback output of 315 Hz to playback output

of 10kHz:  ±0.5 dB

Adjustment Location: AUDIO and main boards

Procedure:
1. Mode:  Record

Adjustment Location:  Main board

[MAIN  BOARD] (Component Side)

[AUDIO  BOARD]  (Conductor Side)

attenuator

set

Pin 

6

 (L-CH) of IC1501 on the main board.

Pin 

#¶

 (L-CH) of IC1501 on the main board.

1) 315 Hz
2) 10 kHz

50 mV (–23.8 dB)







Pin 

2

 (GND) of ICN207 on the main board.

600 

Ω

blank tape
CN-123

AF OSC

2. Mode:  Playback

Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV1501 (L-
CH) and RV1551 (R-CH) on the main board to repeat steps 1 and 2.

CN207 PB level:  47.3 to 53.1 mV (–24.3 to –23.3 dB)

set

Pin 

6

  (L-CH) of IC1501 on the main board.

Pin 

#¶

  (R-CH) of IC1501 on the main board.

315 Hz, 50 mV (–23.8 dB)

blank tape
CS-123

Pin 

2

  (GND) of CN207 on the main board.

600 

Ω

attenuator

AF OSC

RECORD

BAIS

TAPE SPEED

(NORMAL)

RV651

®

(HIGH)

RV652

®

RV311

L 

®

RV411

R 

®

PB

LEVEL

RV441 RV341

RV301

®

L

RV401

®

R

R

L

– DECK B –

– DECK A –











PB LEVEL

    

































+
–

set

recorded
portion

CN207 (Pin 

1

: L-CH)

(Pin 

3

: R-CH)

level meter

RV1501

IC1501

CN205

CN207

RV1551

RECORD LEVEL

IC301

IC201