LG 55UN6950ZUA Service Manual page 57

Standard Repair Process Detail Technical Manual
symptom
Content
SET Model
55LG73 & 55UN69/71/72/73/74/75/78/79/80/8100
Series
Power Check Sequence
1. AC input Check : SK100 (100~240Vac)
2. PWR-ON Check : P201, 1 pin
- SET On : above 3V
- SET St-by : 0V
3. 13.2V DC Check : P201, 4~8 pin
- SET On : 13.2V
- SET St-by : 7.8V
4. MS Level Check : P201, 11 Pin
MS Level Range [V]
MS (0V) 0 ~ 0.25
MS (2V) 1.75 ~ 2.25
MS (3V) 2.75 ~ 3.25
※ Home mode : General Customer
Store mode : use Store
5. LED voltage Check : P801, LED B+
전압
all condition meets, Power Board OK.
Error
B. Power error _No power
Check power input voltage and ST-BY 7.8V
LED On/Off
Off
On (Home mode)
On (Store Mode)
Established
date
Revised
date
※ Depending on Model Power Board is different.
But Interface(P801, P201) and Spec is same
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Only for training and service purposes.
A18
SK100 (AC input)