LG 42LV3710-TB / 42LV371Y-TB / 42LV3730-TD (CHASSIS:LB12B) Service Manual ▷ View online
Contents of LCD TV Standard Repair Process Detail Technical Manual
No.
Error symptom
Content
Page
Remarks
19
B. Power error_Off when on, off while
viewing
viewing
POWER OFF MODE checking method
B-2-1
20
POWER BOARD PIN voltage checking method
B-2-2
22
C. Audio error_No audio/Normal video
Checking method in menu when there is no
audio
audio
C-1-1
23
Voltage and speaker checking method when
there is no audio
there is no audio
C-1-2
24
Use Sound Test Mode
C-1-3
25
C. Audio error_Wrecked
audio/discontinuation
audio/discontinuation
Voltage and speaker checking method in case
of audio error
of audio error
C-2-1
29
D. Function error_ No response in remote
controller, key error
controller, key error
Check Cable Connection
D-1-1
Check Assemble state of Touch PCB
D-1-2
Check 3.5V and 5V of IR Terminal
D-1-3
Check Touch Value and Threshold
D-1-4
Continued from previous page
Measure the DC 24V supplied to LED Driver from the Power Board.
Established
date
date
Standard Repair Process Detail Technical Manual
Revised
date
date
LCD TV
Error
symptom
symptom
LED Driver B+ 24V measuring method
Content
A. Video error_No video/Normal audio
A-1-2
24V is provided from the Power Board and supplied to LED
Driver PCB. Check the PIN contact condition and connection.
Driver PCB. Check the PIN contact condition and connection.
Check each voltage output (5V,12V,24V) in the Power Board.
Established
date
date
Standard Repair Process Detail Technical Manual
Revised
date
date
LCD TV
Error
symptom
symptom
Check LED Driver PCB supply voltage
Content
A. Video error_No video/Normal audio
A-1-3
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