LG OLED77Z19LA Service Manual page 60

Standard Repair Process Detail Technical Manual
symptom
Content
Check a voltage of DC 12VM
(ST-BY : 7.8V, Normal : 12V)
23.5V(EVDD)
23.5V(EVDD) ON -> 21.5V
Error
B. Power error _No power
Check power input voltage and ST-BY 7.8V
23.5V(EVDD) ON
23.5V(EVDD) ON -> 21.5V
P201
P202
P205
P204
23.5V(EVDD) OFF
23.5V(EVDD) OFF
A9
Established
date
Revised
date
Power To Main B'd
P201
Power To Module
P202 P204
15
14
GND
13 14
13
12
12
11
10 11
12V
10
9
8 9
8
7
7
6
6
5
5
4
GND
4
3
3
2
2
1
1
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A9
P205
23.5V
GND