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5

• This mode is used to check the fluorescent indicator tube, LED

and key.

Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press three keys of  x , [GAME EQ] and [DISC 2] simultaneously.
3. Fluorescent indicator tube and LEDs are all turned ON.
4. Press two keys of [GAME EQ] and [DISC 2] simultaneously, mode

is changed over.

5. In the key check mode, press each key, the defined key number

of every each key list is displayed on the fluorescent indicator
tube.

6. In the key count check mode, “KEYCNT 0” is displayed on the

fluorescent indicator tube. Each time a key is pressed,
“KEYCNT” value increases. However, once a key is pressed, it
is no longer taken into account.

7. In the headphone input check mode, connect the headphone,

the message “H_P ON” is displayed on the fluorescent
indicator tube, and disconnect the headphone, the message “H_P
OFF” is displayed on the fluorescent indicator tube.

8. In the volume check mode, turn the [VOLUME]  knob, the

display on the fluorescent indicator tube is changed over  to
“VOLUME UP”, “VOLUME FLAT” or “VOLUME DOWN”

• This mode is used to check operations of Amplifier.
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press three keys of  x , [GAME EQ] and [DISC 3] simultaneously.
3. When the MC test mode is activated, the message “TEST

MODE” is displayed on the fluorescent indicator tube
momentarily, then VACS level is displayed on the fluorescent
indicator tube.

4. Press the [MUSIC EQ]  key, the display on the fluorescent

indicator tube is changed over to “GEQ MAX”, press the
[EFFECT ON/OFF] key, the display on the fluorescent indicator
tube is changed over to “GEQ 16”, press the [MOVIE EQ] key,
the display on the fluorescent indicator tube is changed over to
“GEQ MIN”,

5. Turn  the  [VOLUME]  knob, the display on the fluorescent

indicator tube is changed over to “VOLUME MAX”, “VOLUME
MID” or “VOLUME MIN”

6. Press the [GROOVE] key, VACS ON/OFF is changed over.
7. When the [REC PAUSE/START] key is pressed with a tape set in

the deck-B, the function is switched “MD” or “VIDEO” and
recording starts. When the m or M key is pressed during
recording, the tape is rewound back to the beginning of
recording, the function is switched to “TAPE B”, then playback
starts.

8. When the [CD SYNC] key is pressed with the test tape (AMS-

100, AMS-110A) in the deck, number of space between tunes
is counted, then if AMS-110A is set, “OK” is displayed on the
fluorescent indicator tube and if AMS-100 is set, “NG” is
displayed on the fluorescent indicator tube.

9. To release from this mode, press the [POWER] key.

• This mode is used to check the model, destination and software

version.

Procedure:
1. Set to the standby state.
2. Press three keys of  x  ,  [GAME EQ]  and  [MOVIE EQ]

simultaneously.

3. When the model, destination and version display mode is

activated, the model an destination is displayed on the
fluorescent indicator tube.

4. Press two keys of [GAME EQ] and [DISC 2] simultaneously, mode

is changed over to model and destination display mode and
version display mode.

5. To release from this mode, press the two keys of [GAME EQ]

and [MOVIE EQ] simultaneously.

• This mode can be used for error display of CD section.
Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Press three keys of  x , [GAME EQ] and [DISC 1] simultaneously.

 Error code is not displayed on the fluorescent indicator tube.

• This mode can run the CD sled motor freely. Use this mode, for

instance, when cleaning the optical pick-up.

Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Press three keys of x , [GAME EQ] and Z simultaneously.
4. When the CD service mode is activated, the message

“TRAVERS ON” is displayed on the fluorescent indicator tube.

5. Press the M key, optical pick-up move to outside track and

the message “SLED OUT” is displayed on the fluorescent
indicator tube.

6. Press the m key, optical pick-up move to inside track and

the message “SLED IN” is displayed on the fluorescent
indicator tube..

7. Press the [MOVIE EQ] key, traverse ON/OFF is changed over.

• Number of repeat for CD playback is 5 times when the repeat

mode is “REPEAT”. This mode is used to enables CD to repeat
playback for limitless times.

Procedure:
1. Press the [POWER] key to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Press three keys of  x , [GAME EQ] and  G  (RV20) or  gG

(RV50/RV60) simultaneously.

6

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 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.

3.06 N • m to 6.96 N • m

FWD

CQ-102C

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

FWD

0.19 N • m to 0.58 N • m

back tension

CQ-102C

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

3.06 N • m to 6.96 N • m

REV

CQ-102RC

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

REV

0.19 N • m to 0.58 N • m

back tension

CQ-102RC

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

6.96 N • m to 14.02 N • m

FF/REW

CQ-201B

71 to 143 g • cm

(0.98 – 1.99 oz • inch)

9.80 N • m

FWD tension

CQ-403A

100 g or more

(3.53 oz or more)

9.80 N • m

REV tension

CQ-403R

100 g or more

(3.53 oz or more)

7

0 dB=0.775 V

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 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 adjust-
ment.)

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.

• Test Tape

 Perform this adjustments for both decks

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 1dB of peak.

3. Mode: Playback

4. After the adjustments, apply suitable locking compound to the

pats adjusted.

Adjustment Location: Playback Head (Deck A).

Record/Playback/Erase Head (Deck B).

set

main board
IC201
Pin 

5

 (PB OUT(R))

Pin 

wh

 (PB OUT(L))

main board
IC201
Pin 

eh

 (GND)

+
–

level meter

test tape
P-4-A100
(10 kHz, –10 dB)

Screw
position

L-CH
peak

within
1dB

Output
level

L-CH
peak

R-CH
peak

within
1dB

Screw
position

R-CH
peak

MAIN
board
IC201
   set

test tape
P-4-A100
(10 kHz, –10 dB)

pin 

5

oscilloscope

L-CH

R-CH

V

H

waveform of oscilloscope

in phase 45

°

90

°

135

°

180

°

good

wrong

pin 

eh

pin 

wh

L

R

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

forward

reverse

8

1. CD Block is basically designed to operate without adjustment.

Therefore, check each item in order given.

2. Use YEDS-18 (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MW impedance.
4. Clean the object lens by an applicator with neutral detergent when

the signal level is low than specified value with the following
checks.

Procedure :
1. Connect an oscilloscope to TP (FE) and TP (DVD) on the BD

board.

2. Turn the power ON.
3. Load a disc (YEDS-18) and actuate the focus search. (In conse-

quence of open and close the disc tray, actuate the focus search)

4. Confirm that the oscilloscope waveform (S-curve) is symmetri-

cal between A and B. And confirm peak to peak level within 2 ±
0.5 Vp-p.

• Try to measure several times to make sure than the ratio

of A : B or B : A is more than 10 : 7.

• Take sweep time as long as possible and light up the

brightness to obtain best waveform.

Procedure :
1. Connect an oscilloscope CH1 to TP (RFDC), CH2 to TP (RFAC)

and TP (DVD) on the BD board.

2. Turn the power ON.
3. Load a disc (YEDS-18) and playback the number nine track.
4. Confirm that oscilloscope waveform is clear and check if RF

signal level is correct or not.

Clear RF signal waveform means that the shape “ 

◊ ” can be

clearly distinguished at the center of the waveform.

Procedure :
1. Connect an oscilloscope to TP (TE) and TP (DVD) on the BD

board.

2. Turn the power ON.
3. Load a disc (YEDS-18) and playback the number nine track.
4. Press the  G  (RV20) or  gG  (RV50/RV60) button. (Becomes

the 1 track jump mode.)

5. Confirm that the level B and A (DC voltage) on the oscilloscope

waveform.

+
–

oscilloscope

BD board

TP (FE)  

    TP (DVD)

symmetry

S-curve waveform

within 2 

±

0.5Vp-p

A

B

+
–

oscilloscope

TP (RFDC)

TP (RFAC)

BD board

TP (DVD)

RF signal waveform

VOLT/DIV : 200mV
TIME/DIV : 500ns

level : 0.75 

±

0.1Vp-p (RFDC)

1.05 

±

0.3Vp-p (RFAC)

TP (TE)

TP (DVD)

BD board

+
–

oscilloscope

level=1.2 

±

0.55Vp-p

symmetry

A (DC voltage)

center of
waveform

B

DVC

1 track jump waveform

– BD BOARD (Conductor Side) –

TP (TE)

TP (FE)

TP (RFDC)

TP (DVD)

TP (RFAC)