LG OLED77Z19LA - Page 60

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