LG OLED48C3 Series Service Manual page 73

Note 1. How to measure ST-by
1. Measure the 12VM of Power B/D and Main B/D connector
2. When measuring 12VM, it is considered normal if ST-by is7.8V and Normal is 12.
3. If the result comes out 'NG', replace Power Board
The ST-by voltage for each model may be different, so refer to the Appendix A9 page in Service Manual.
(Some models launched before 2017 may have 5V / 3.5V)
Note. 1 / 4
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