LG MCD112 - Page 56

4-7
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Only for training and service purposes
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Defective IC801
Does
SP+ waveform
appear at (IC802
PIN11 and PN802 PIN5)
waveform #4 spindle
motor drive
wave
Does
spin waveform
appear at (IC802 PIN6)
waveform #4
spindle drive
wave
NO
NO
1-7. READING OK CHECK #D (= “NO DISC” DISPLAY)
YES
YES
D
Defective IC802
NO
Defective PN802 connector
Defective pick up
spindle motor
Check PN802 connector line
YES