LG FE-286E - Page 11

- 2-4 -
Fails to initial read
A
B
2V
5V
0V
5V
0V
1V
0V
1.2V
0V
0.8V
NO NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Disc motor turns
Does RF waveform appear?
IC801 Pin3
Check the Data transmission from
PN809 pin11 to CD DSP
Check the Data transmission from
PN809 pin13 to MICOM
Check the change of SLDO
Voltage(IC801 pin23)
Check the change of SL +,
SL - Voltage
(IC802 pin 18, 19)
Check the Voltage change of PN 809
PIN20(OPEN, CLOSE)
Defective connector
PN809
Defective connector
PN809, Defective
MICOM
Defective connector
PN809, Defective
IC801
Defective IC801
Defective IC802
Defective contact PN802
Defective PICK-UP
Does laser light?
focus coil drive wareform.
TRACKING ERROR wareform
Is rotation normal?
Defective IC801
Defective PICK-UP
Is there no dropout of RF signal?
Does FA+ waveform appear at
IC802 pin13?
Does TE waveform appear at
801 pin 15?