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– 17 –

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 NEXT , ENTER/NEXT ,

and KARAOKE PON/MPX  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 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 NEXT , ENTER/NEXT ,

and KARAOKE PON/MPX  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.

– 18 –

On this mode, the data of the color bar signal as a picture signal
and the 1 kHz sine wave signal as a sound signal are output by the
mechanism controller (IC701) for the video CD signal check.
When measurement of the voltage and waveform on the VIDEO
board, perform it in this mode.
For reference, the color bar signal can be observed at J9001
(VIDEO OUT) and the sound signal can be observed at J101
(VIDEO/MD (AUDIO) OUT) using an oscilloscope.
Procedure:
1. Turned power switch on.
2. Press the  FUNCTION  button to select the CD.
3. Connect the SL701 on the VIDEO board with solder.
4. After measuring, remove the soldering installed.

+
–

oscilloscope

75 

Ω

set

J9001 (VIDEO OUT)

B

H

C

A

A = 0.9 to 1.1 Vp-p
B = 0.678 to 0.75 Vp-p
C = 0.214 to 0.328 Vp-p

[VIDEO BOARD] (SIDE-B)

Refer to the SECTION 6 ELECTRICAL ADJUSTMENTS page
22.
Procedure:
1. Turned power switch on.
2. Press the  FUNCTION  button to select the CD.
3. Connect the SL701 and SL703 on the VIDEO board with sol-

der.

4. Press the  

· ∏  button in playback.

5. Every pressing the  REPEAT  button on the remote commander,

the tracking servo and sledding servo are turned on or off.

6. When the servo is off, the counter on front panel will not be

changed.

7. After measuring, remove the soldering installed.

SL702

SL701

IC751

SL703

IC251

– 19 –

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.

• Torque Measurement

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)

Forward

CQ-403A

more than 100 g (3.53 oz)

Reverse

CQ-403R

more than 100 g (3.53 oz)

0 dB=0.775 V

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 

3

 (L-CH)

pin 

1

 (R-CH)

MAIN board
CN207
pin 

2

 (GND)

+
–

level meter

test tape
P-4-A100
(10 kHz, –10 dB)

• Tape Tension  Measurement

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 adjust-
ment 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

NEXT   ENTER/NEXT and  EFFECT ON/OFF buttons.)

– 20 –

reverse

forward

Screw
position

L-CH
peak

within
1 dB

output
level

L-CH
peak

R-CH
peak

within
1 dB

Screw
position

R-CH
peak

set

test tape
P-4-A100
(10 kHz, –10 dB)

pin 

1

 (R-CH)

oscilloscope

V

H

waveform of oscilloscope

in phase 45

°

90

°

135

°

180

°

good

wrong

pin 

2

 (GND)

pin 

3

 (L-CH)

MAIN board
CN207

+
–

set

test tape
WS-48B 
(3 kHz, 0 dB)

MAIN board
CN207 (pin 

3

 : L-CH)

     (pin 

1

 :R-CH)

frequency counter

+
–

set

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

MAIN board
CN207 (pin 

3

: L-CH)

(pin 

1

: R-CH)

level meter

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.

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: Playback Head (Deck A)

Record/Playback Head (Deck B)

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 NEXT button, ENTER/NEXT button and

  EFFECT ON/OFF  button simultaneously.
To exit from the test mode, press the POWER button.

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 board (See page 21)

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

deck B.

2. Press the

r 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 so that frequency counter

reads 6,000 ± 90 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 ± 90 Hz.

8. Frequency difference between deck A and deck B the begin-

ning of the tape should be within ± 1.5 %.

Adjustment Location:  AUDIO board (See page 21)
Sample value of Wow and Flutter: 0.3% or less W.RMS

(WS-48B)

Procedure:
Mode:  Playback (FWD)