Checking Flow Chart By Failure - LG LUTE4619SN Service Manual

Symptom
1. Power Failure (Dead)
2. No Display
Main PCB
Thermostat
WH
RD
TROuBLEShOOTING

ChECkING FLOw ChART By FAILuRE

1. Check Electrical Wiring
2. Check the SMPS PCB Input Voltage with CN01
CN03
CN03
CN02
CN01
SMPS PCB
Check point
Pin No. Voltage
1-3 Vf(4.3V)
4-7 -33V
6-7 12V
8-3
CN01
CN02