LG LAC-M2500R Service Manual page 10

B
When laser light.
Check the signal FOCUS
SEARCH of IC501 Pin 37
Check the signal of IC504
C
When SPINDLE motor dose not turn
Check the change for
Check the change for SP +, SP
-, Voltage of IC504 Pin11, 12
Laser lights
YES
WAVEFORM #3
YES
Pin 15, 16
WAVEFORM #3
YES
SPDO Voltage of
IC501 Pin29
WAVEFORM #1
WAVEFORM #1
NO
Defective IC501
NO
Defective IC501
Degraded laser diode
Defective PICK-UP
NO
Defective IC501
YES
NO
Defective IC504
YES
Defective contact CN502 or
Defective PICK-UP
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