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FAILS TO INITIAL READ
Does MD act?
YES
Disc motor turns.
YES
Does RF waveform
appear? IC803 Pin3
YES
Do voltage N 807 PIN11(MM+), PIN
12 (MM-), PIN13 (SOL) change?
YES
Defective connector PN802.
NO
Check the Data transferred from
PN807 pin5 to CD DSP.
YES
Check the Data transferred from
PN807 pin7 to MICOM.
YES
Are SLOD voltage.
transmited in IC801 PIN23
(IC801 pin23)
YES
Check the change of
SL +, SL - Voltage.
(IC802 pin 13, 14)
Does laser light?
YES
Does FA+ waveform appear at
IC802 pin15?
focus coil drive wareform.
YES
Does TE waveform appear at
IC801 pin15?
TRACKING ERROR wareform.
YES
Is rotation normal?
YES
Is there no dropout of RF signal?
- 2-3 -
NO
NO
5V
0V
NO
5V
0V
NO
2V
1V
2V
1.2V
NO
0V
0.8V
YES
• Defective contact PN803.
• Defective PICK-UP.
A
B
NO
• Defective IC801.
• Defective PICK-UP.
YES
• Defective connection PN807.
• Check the MICOM.
• Defective connector
PN807.
• Defective MICOM.
• Defective
connector PN807.
• Defective IC801.
Defective IC801.
Defective IC802.
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