Sanyo VHR-M261EV Service Manual page 22

B.
Drum Motor stopped.
Does 12V appear at PMD01 Pin 4?
YES
Does 2.8V appear at PMD01 Pin 1?
Check Connector and Drum Motor Ass'y.
Check the Components and foil Pattern
between IC501 Pin 26 and PMD01
Pin 1 for shorts.
Do DFG Pulses appear at IC501 Pin 38?
YES
Does the Drum PWM waveform
appear at IC501 Pin 26?
YES
Check the Components and foil Pattern
Connected to IC501 Pin 26 PMD01
Pin 1 for shorts.
NO
NO
YES
YES
NO
NO
Does Drum PWM appear at IC501 Pin 26?
Do DFG Pulses appear at PMD01 Pin 3?
Check Drum Monitor Ass'y.
Check the Components and foil pattern
between PMD01 Pin 3 and IC501
Pin 38 for shorts.
3-7
Check Power.
NO
NO
Replace IC501.