LG 50UL3G Service Manual page 45

Standard Repair Process Detail Technical Manual
Error
symptom
Content
Power P/N, Name
SET Model
50UL3G EAY65769221 , LGP50T-20U1
Power Check Sequence
1. AC input Check : SK100 (100~240Vac)
2. PWR-ON Check : J3
- SET On : above 3V
- SET St-by : 0V
3. 13.2V DC Check : D201 center Pin
- SET On : 13.2V
- SET St-by : 7.8V
4. MS Level Check : MS Check Hole
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, Pin 1-7
Picture Condition : VIVID (Back light 100)
Min Typ.
152.1 V 169 V
all condition meets, Power Board OK.
B. Power error _No power
Check power input voltage and ST-BY 7.8V
Power Board Voltage / Current
LED On/Off
Off
On (Home mode)
On (Store Mode)
Max
185.9 V
Established
Revised
SK100 (AC input)
A10
date
date
MS
P801
J3- PWR-ON
P201
D201 (13.2V)
- Center Pin
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A10