System & Front Panel Circuit - LG EC290W Service Manual

3. System & Front Panel Circuit
A.
Auto stop.
Does SW30 waveform
appear at IC501 Pin 18?
YES
Do Take-up reel pulses
appear at IC501 Pin 80?
YES
Change IC501.
NO
Check the Drum Motor
Signal.
NO
Does 5.3V appear at
RS501.
YES
Replace the Take-Up Reel
Photocoupler on Main
PWB Board(RS501).
3-10
NO
Check the Power.