CD-MPX870
7 – 4
The HF waveform is normal and the time is dis-
played normally, but no sound is produced. Or the
sound has dropouts.
(4) PLL system check.
When a disc is loaded, start play operation.
The HF waveform is normal, but the TOC data cannot be read.
Check the PDOUT waveform. (Figure 6)
Check around pins 26~30 on IC1.
Figure 6
T
FDO
PDO1
PDO0
Stopped
CH1=500 mV
DC 10:1
CH3=1 V
DC 10:1
CH4=1 V
DC 10:1
500 ms/div
(500 ms/div)
NORM:20 kS/s
1
4
3
=Record Length=
Smoothing : ON
CH1 : 0.000 V
CH2 : 0.0 V
Main : 100 K
Zoom : 2 K
Mode : AUTO
Type : EDGE CH2
Delay : 0.0 ns
Hold off : 0.2 µs
CH3 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
CH1
v/DIV
500 mV
1999/04/05 17:33:17
(5) Others.
Is pin 35 (C2F) on IC1 "L" ?
No
There are too many error flags on a damaged disc which makes
error correction impossible.
Yes
1. When playing at normal speed.
Check the peripheral circuit at pin 69 (DOUT) on IC1 and the
waveform (Figure 7).
Check again using a known good disc.
If OK, Check the unit.
Figure 7
T
T
DOUT
Stopped
CH1=2 V
DC 10:1
500 ns/div
1999/04/07 09:25:28
(500 ns/div)
NORM:200 MS/s
1
=Record Length=
Smoothing : ON
CH1 : 0.00 V
CH2 : 0.00 V
Main : 1 K
Zoom : 100
Mode : NORMAL
Type : EDGE CH1
Delay : 2.887 ms
Hold off : 0.2 µs
CH3 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
Содержание CD-MPX870
Страница 12: ...CD MPX870 2 7 APPLY GREASE SC141 PULL THE LEVER UNITIL REACH THE ARROW MARK 143 112 3 ...
Страница 15: ...CD MPX870 2 10 APPLY GREASE SC141 AT HALF GEAR AREA ROTATE CLOCKWISE UNTIL REACH HERE MAXIMUM 6 129 ...
Страница 16: ...CD MPX870 2 11 151 150 149 7 ...
Страница 19: ...CD MPX870 2 14 10 148 147 146 145 ...
Страница 20: ...CD MPX870 2 15 APPLY GREASE SC141 WHEN FIXING ITEM 144 MUST FOLLOW AS SHOWN 121 144 130 11 ...
Страница 21: ...CD MPX870 2 16 FIGURE 1 FIGURE 3 FIGURE 2 APPLY GREASE SC141 APPLY GREASE SC141 117 12 ...
Страница 29: ...CD MPX870 2 24 20 110 BIG SLOT FACING OUT ...
Страница 41: ...CD MPX870 2 36 NO GAP HAVE GAP CORRECT INCORRECT 32 ...
Страница 48: ...CD MPX870 3 7 MEMO ...
Страница 54: ...CD MPX870 5 3 MEMO ...
Страница 56: ...CD MPX870 6 2 3 SCHEMATIC DIAGRAM Figure 6 2 MAIN SCHEMATIC DIAGRAM 1 2 TO CD SERVO ...
Страница 57: ...CD MPX870 6 3 Figure 6 3 MAIN SCHEMATIC DIAGRAM 2 8 ...
Страница 58: ...CD MPX870 6 4 Figure 6 4 POWER SCHEMATIC DIAGRAM 3 8 ...
Страница 59: ...CD MPX870 6 5 Figure 6 5 POWER SCHEMATIC DIAGRAM 4 8 P LED702 ...
Страница 60: ...CD MPX870 6 6 Figure 6 6 DISPLAY SCHEMATIC DIAGRAM 5 8 TAPE MECHANISM PWB G ...
Страница 61: ...CD MPX870 6 7 Figure 6 7 DISPLAY SCHEMATIC DIAGRAM 6 8 ...
Страница 62: ...CD MPX870 6 8 Figure 6 8 SCHEMATIC DIAGRAM 7 8 ...
Страница 63: ...CD MPX870 6 9 Figure 6 9 SCHEMATIC DIAGRAM 8 8 ...
Страница 67: ...CD MPX870 6 13 Figure 6 13 WIRING SIDE OF MAIN PWB BOTTOM VIEW 4 15 1 1 2 3 4 5 6 7 7 8 9 10 11 ...
Страница 68: ...CD MPX870 6 14 MEMO ...
Страница 73: ...CD MPX870 6 19 Figure 6 18 WIRING SIDE OF DISPLAY PWB BOTTOM VIEW 9 15 ...
Страница 76: ...CD MPX870 6 22 Figure 6 21 WIRING SIDE OF CD SERVO PWB TOP VIEW 12 15 ...
Страница 77: ...CD MPX870 6 23 Figure 6 22 WIRING SIDE OF CD SERVO PWB TOP VIEW 13 15 ...
Страница 92: ...CD MPX870 8 9 MEMO ...
Страница 103: ...CD MPX870 10 10 CD MECHANISM PARTS ...
Страница 105: ...CD MPX870 12 11 CHANGER MECHANISM PARTS ...
Страница 107: ...CD MPX870 14 12 CABINET PARTS Tuner Pack ...
Страница 111: ...CD MPX870 18 ...
Страница 112: ...CD MPX870 19 A0606 LAG ...