LG LAC-M7600 Service Manual page 10

B
When laser light.
C
When SPINDLE motor dose not turn
Laser lights
YES
Check the signal FOCUS
SEARCH of IC506 Pin25
WAVEFORM #3
YES
Check the signal of IC504
Pin 15, 16
WAVEFORM #3
YES
Check the change for
SPDO Voltage
of IC506 Pin21
WAVEFORM #1
Check the change for
SP +, SP –, Voltage
of IC504 Pin11, 12
WAVEFORM #1
YES
NO
Defective IC506
NO
Defective IC506
Degraded laser diode
Defective PICK-UP
NO
Defective IC506
NO
Defective IC504
Defective contact PN501
or Defective PICK-UP
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