CD-MPX870
7 – 3
Check the TE waveform at pin 16 on IC1.
(2) Focus-HF system check.
If the waveform shown in Figure 4 appears and soon after NO
DISC appears ?
Yes
The tracking servo is not activated.
Check the peripheral circuits at pins 15, 16 and 23 on IC1,
and FFC1.
No
"Initialization" is possible, but play is not possible ?
Yes
A normal jump operation cannot be completed or the begin-
ning of the track cannot be found.
Check the around pin 23 on IC1.
No
"Initialization" is not possible.
Data cannot be read. Check the VCO-PLL (Pin26~30 on IC1)
system.
Figure 4
T
T
TE
DRF
Stopped
CH1=10 V
DC 10:1
CH2=1 V
DC 10:1
100 ms/div
(100 ms/div)
NORM:100 kS/s
2
1
=Record Length=
Smoothing : ON
CH1 : 0.0 V
CH2 : 0.00 V
Main : 100 K
Zoom : 2 K
Mode : NORMAL
Type : EDGE CH1
Delay : 2.924 ms
Hold off : 0.2 µs
CH3 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
(3) Spin system check.
Press the OPEN/CLOSE switch without inserting a disc, and
then try starting the play operation.
1. The turntable rotates a little ?
(Waveform drawing Figure 5)
Yes
The spin driver circuit is OK.
No
2. The turntable doesn't rotate.
Check around pin 25 on IC1, pins 5 and 6 on CNP2.
Figure 5
T
T
PDOUT 0
PDOUT 1
Stopped
CH1=200 mV
DC 10:1
CH2=500 mV
DC 10:1
500 ms/div
1999/04/07 09:51:15
(500 ms/div)
NORM:20 kS/s
2
1
=Record Length=
Smoothing : ON
CH1 : 0.000 V
CH2 : 0.000 V
Main : 100 K
Zoom : 2 K
Mode : NORMAL
Type : EDGE CH2
Delay : 2.924 ms
Hold off : 0.2 µs
CH3 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
FD0
SPD0
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 ...