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

Entry method
1. Press the Menu button on the remote controller
2. Enter into Support -> Sound Test
3. The TV Play the Test Music
Established 
date 
Standard Repair Process Detail Technical Manual
Revised 
date 
LCD TV
Error 
symptom
Use Sound Test Mode
Content
C. Audio error_
No audio/Normal video  
C-1-2
Menu -> Support -> Sound Test
Sound Test (Play the Music)
Checking order when there is no audio
①
②
③
① Check the contact condition of 24V connector of Main Board
② Measure the 24V input voltage supplied from Power Board (If there is no input voltage, remove and 
check the connector)
③ Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you 
touch the GND and output terminal, the speaker is normal. 
Established 
date 
Standard Repair Process Detail Technical Manual
Revised 
date 
LCD TV
Error 
symptom
Voltage and speaker checking method 
when there is no audio
Content
C. Audio error_ No audio/Normal video  
C-1-3
Checking order when there is no audio
①
②
③
① Check the contact condition of 24V connector of Main Board
② Measure the 24V input voltage supplied from Power Board (If there is no input voltage, remove and 
check the connector)
③ Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you 
touch the GND and output terminal, the speaker is normal. 
Established 
date 
Standard Repair Process Detail Technical Manual
Revised 
date 
LCD TV
Error 
symptom
Voltage and speaker checking method in case of audio error
Content
C. Audio error_
Wrecked audio/discontinuation/noise 
C-2-1
Established 
date 
Standard Repair Process Detail Technical Manual
Revised 
date 
LCD TV
Error 
symptom
Check Cable Connection 
Content
D. Function error_ No response in remote controller,
key error
D-1-1
1. Check Connection state of Main Board.
2. Check Connection state of Touch PCB
3. Check Cable and Connection State
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