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Standard Repair Process Detail Technical Manual
symptom
Content
SET Model
75UQ90/91*
EAY65895541, LGP75NT-21U1
Power Check Sequence
1. AC input Check : SK100 (100~240Vac)
2. PWR-ON Check : P201, 11pin
- SET On : above 3V
- SET St-by : 0V
3. 13.2V Level Check : P210, 4~8pin
- SET On : 13.2V
- SET St-by : 8.4V (swing between 7V to 10V)
4. DRV_ON Check : P210, 1pin
- SET On : above 3V
- SET St-by : 0V
5. LED voltage Check : p801
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
A18
SK100 (AC input)
Copyright © 2022 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
A18
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