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— 5 —

This model has the self-diagnosis function for the VIDEO and
AUDIO decoder sections.
Immediately after the power on, the self-diagnosis function searches
each operation of IC’s around the mechanism control microcom-
puter (IC701).
The results can be checked by connecting an oscilloscope to TP709
(LED) of theVIDEO board.

Oscilloscope (Waveform)

Symptom

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

2-1.  Operating procedure 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 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.

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)

H

L

1 time blinking

H

L

2 time blinking

H

L

Light

H

L

3 time blinking

No error

MPEG decoder (IC201)
error

DRAM (IC251) error

External SRAM (IC751)
error

oscilloscope

VIDEO board
TP709 (LED)

+
–

Note: The LED for check (D701) is mounted to some sets

(FORMER TYPE). In this case, confirm the lighting condi-
tion of LED.

D701

IC771

X901

TP709 (LED)

IC751

IC251

— 6 —

— 7 —

1 POWER button
2 DISC SKIP EX-CHANGE button
3 CD 

0, ) button

4 DISC1-DISC3 buttons
5 CD 

p button

6

§ OPEN/CLOSE button

7 CD 

·∏ button

8 VCD indicator
9 PREV button

10 DISPLAY/DEMO button

11 NEXT button

12 DIRECTION button
13 RETURN button
14 1/ALL DISCS button
15 SELECT button
16 PLAY MODE button
17 LOW FREQUENCY button
18 JOG dial, indicator
19 HIGH FREQUENCY button
20 KARAOKE PON/MPX button
21 VOLUME control

22 FUNCTION button
23 TUNER MEMORY button
24 TUNER/BAND button
25 STEREO/MONO button
26 TUNING MODE button
27 EFFECT ON/OFF button
28 DBFB button
29 DSP button
30 ENTER/NEXT button
31 PROLOGIC button
32 GROOVE button
33 GAME button
34 FLASH button
35 MOVIE button
36 ECHO LEVEL knob
37 LOOP button
38 MIC LEVEL knob
39 MIX MIC jack
40 PHONES jack
41 WAVE button
42 NON-STOP button

43 MUSIC button
44 P FILE button
45 P FILE MEMORY button
46 SLEEP button
47 CLOCK/TIMER SET button
48 AUTO PBC indicator
49 PBC indicator
50 TIMER SELECT button
51 Deck A 

ª, · button

52 Deck A 

0, ) button

53 HIGH SPEED DUBBING button
54 CD SYNCHRO button
55

r REC button

56

P (PAUSE) button

57 Deck B 

0, ) button

58 Deck B 

ª, · button

59 Deck B 

p button

60 Deck B 

6 button

61 Deck A 

6 button

62 Deck A 

p button

 Follow the disassembly procedure in the numerical order given.

1

 Three screws

(+BVTP3x8)

2

 Four screws

(+BVTP3x8)

3

 Three screws

(+BVTP3x8)

4

 Four screws

(+BVTP3x8)

8

 Back panel

7

 Connector 

(CN961)

6

 Flat type wire

(15 core)

5

 Connector (CN9001)

Wire clamp

Ferrite core

Bushing cord

Power transformer  

Installing the power cord for the 
Chinese model.

— 8 —

1

 Turn the cam to the direction of arrow

Two claws

3

 Loading panel

2

 Pull-out the

disc tray.

7

 CD mechanism deck

6

 Connector

(CN901)

1

 Flat type wire (13 core)

5

 Screw

(+BVTP3x8)

4

 Screw

(+BVTP3x8)

3

 Connector

(CN820)

2

 Connector

(CN830)