1. “CD OPEN” is not displayed.
16
1
Is +5 V lines pin 72
of IC704 normal ?
No
Yes
*
Check IC705.
*
Check circuit around IC705.
Is the waveform
at pin 30 of IC704 like that
shown in Fig. 12 ?
No
Yes
*
Check Q713.
*
Check circuit around IC706.
Does 16 MHz
clock pulse appear at
pin 31of IC704 ?
No
Yes
*
Check X703.
*
Check circuit around X703.
*
Check IC704.
*
Check circuit around IC704.
*
Check soldering CN705 and FFC.
Figure 12
5 V
Power on
100 mS
Summary of Contents for ZD-1
Page 1: ... without price ZD 1 MD CD SYSTEM INDEX Model B U S A Model C Europe SEP 1998 ...
Page 28: ...26 PCB VIEWS Tuner PCB Top ...
Page 29: ...27 AMP PCB Top ...
Page 30: ...28 Display PCB Top Display PCB Bottom ...
Page 31: ...29 MD PCB Top ...
Page 32: ...30 MD PCB Bottom ...
Page 33: ...31 CD PCB Top ...
Page 34: ...32 CD PCB Bottom ...
Page 40: ...38 IC505 BA10358 8 7 6 5 1 2 3 4 In 2 In2 Out 2 VCC Out 1 In 1 In 1 GND 2 1 1 4 8 5 ...
Page 59: ...57 3 3 19 20 38 7 1 7 43 ...