LG 55QNED85SQA Service Manual page 63

Standard Repair Process Detail Technical Manual
symptom
Content
SET Model
55QNED85 EAY65904131, LGP55ME-22SP
Power Check Sequence
1. AC input Check : SK100 (100~240Vac)
2. PWR-ON Check : P201, 13 pin
- SET On : above 3V
- SET St-by : 0V
3. DRV-ON Check : P201, 23 pin
- SET On : above 3V
- SET St-by : 0V
4. 13.2V DC Check : P201, 7~8 & 16~18 pin
- SET On : 13.2V
- SET St-by : 7.8V
5. 20V DC Check : P201, 1~4 & 19~20 pin
6. VLED Check : P251, 1~4 pin
- SET On : About 114V
All condition meets, Power Board OK.
Error
B. Power error _No power
Check power input voltage and ST-BY 7.8V
Power P/N, Name
Established
date
Revised
date
SK100 (AC input)
A18