DOWNLOAD LG 42LV3710-TB / 42LV371Y-TB / 42LV3730-TD (CHASSIS:LB12B) Service Manual ↓ Size: 9.22 MB | Pages: 87 in PDF or view online for FREE

Model
42LV3710-TB 42LV371Y-TB 42LV3730-TD (CHASSIS:LB12B)
Pages
87
Size
9.22 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42lv3710-tb-42lv371y-tb-42lv3730-td-chassis-lb12b.pdf
Date
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LG 42LV3710-TB / 42LV371Y-TB / 42LV3730-TD (CHASSIS:LB12B) Service Manual ▷ View online

ST-BY condition: Red
Power ON condition: Blue
Established 
date 
Standard Repair Process Detail Technical Manual
Revised 
date 
LCD TV
Error 
symptom
Check front display LED
Content
B. Power error _No power 
B-1-1
Power checking method
1. Check the AC220V input in the power cord.
2. Check the connected part with input from the POWER BOARD and whether the fuse is connected.
3. Check the ST-BY DC 3.5V output voltage from the POWER BOARD.
①
②
Established 
date 
Standard Repair Process Detail Technical Manual
Revised 
date 
LCD TV
Error 
symptom
Check power input voltage and ST-BY 3.5V
Content
B. Power error _No power
B-1-2
③
Checking method when power is ON
1. Check the ST-BY DC 3.5V output voltage from Soft Touch PCB Test Point T6
2. Check the operating condition of the power KEY on the Soft Touch PCB (Test Point P4, T5)
3. Check the AC-DET (AC) DC3.5V voltage on POWER BOARD.
4. Check the POWER ON High (About DC 1.8V or above) voltage with input from POWER BOARD.
Established 
date 
Standard Repair Process Detail Technical Manual
Revised 
date 
LCD TV
Error 
symptom
Checking method when power is ON
Content
B. Power error _
No power 
B-1-3
①
②
③
④
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