LG EC970W - Drum Motor Stopped

3-8
Drum Motor stopped.
Does 12V appear at PMC01 PIN8?
Does Drum CTL signal appear at PMC01
PIN12?
Check Connector and Drum Motor Ass’y.
Check the Components and foil Pattern
between IC501 Pin 76 and PMC01
Pin 12 for shorts.
Does the Drum PWM waveform
appear at IC501 Pin 76?
Check the Components and foil Pattern
Connected to IC501 Pin 76 PMC01
Pin 12 for shorts.
Do DPG/FG Pulses appear at IC501
Pin 90?
B.
NO
NO
NO
NO
Check Power.
Does Drum PWM appear at IC501
Pin 76?
Do DPG/FG Pulses appear at PMC01
Pin 11?
Check Drum Monitor Ass’y.
Check the Components and foil pattern
between PMC01 Pin 11 and IC501
Pin 90 for shorts.
Replace IC501.
YES
YES
YES
YES
YES
NO
NO