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Standard Repair Process Detail Technical Manual
symptom
Content
SET Model
75SM90
EAY65169931, LGP75M-19SP
Power Check Sequence
1. AC input Check : SK100 (100~240Vac)
2. PWR-ON Check : J17
- SET On : above 3V
- SET St-by : 0V
3. 13.2V Level Check : J26/J27
- SET On : 13.2V (12.54V to 13.86V)
- SET St-by : 7.8Vrms (7.02 to 8.58Vrms)
4. DRV_ON Check :
- SET On : above 3V
- SET St-by : 0V
5. LED voltage Check : P202 (VLED pin)
Voltage
Variable range [V]
61.2V (56.2~72V)
All condition meets, Power Board OK.
Error
B. Power error _No power
Check power input voltage and ST-BY
Power P/N, Name
Rated Current [A]
3.6A (0~3.6A)
Established
Power Board Voltage / Current
A9
date
Revised
date
DRV_ON (J35)
PWR_ON
(J17)
13.2V
(J26/J27
)
SK100 (AC input)
Copyright © 2019 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
A9
P202
P201
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