LG 50UL3G Service Manual page 49

Standard Repair Process Detail Technical Manual
symptom
Monitor Signage
Content
SET Model
86UL3G EAY64888601, LGP86TJ-18U1
Power Check Sequence
1. AC input Check : SK101 (100~240Vac)
2. PWR-ON Check : J18
- SET On : above 3V
- SET St-by : 0V
3. 13.2V DC Check : J3
- SET On : 13.2V [12.45V ~ 13.86V]
- SET St-by : 7.8V
4. MS Level Check : MS
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 1-3,5-7
Picture Condition : VIVID (Back light 100)
Voltage Current (MS2)
240 V 410mA(393~434.8mA)
240 V 410mA(393~434.8mA)
all condition meets, Power Board OK.
Error
B. Power error _No power
Check power input voltage and ST-BY 7.8V
Power P/N, Name
LED On/Off
Off
On (Home mode)
On (Store Mode)
Power Board Voltage / Current
A14
Established
date
Revised
date
P801
MS
J3- 13.2V
P201
J18- PWR-ON
SK100 (AC input)
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A14