LG 32LF5700 Service Manual ▷ View online
- 29 -
(6) In case of becomes unusual display from HDMI mode
(7) In case of becomes unusual display from SCART1 mode
(8) In case of becomes unusual display from SCART2 mode
No
Is normal the
TDA9996(U15)?
Same as Block A
Yes
Check the input source.
(Is normal the Input voltage, IIC
Communication and HV sync?)
(Is normal the Input voltage, IIC
Communication and HV sync?)
No
Is Video input of A/V Jack
normal?(JP14)
Same as Block A
Yes
Check the input source.
No
Is Video input of A/V Jack
normal?(JP15)
Same as Block A
Yes
Check the input source.
Replace IC or Main
Board.
Board.
- 30 -
5. In case of no sound
(1) Symptom
1) LED
is
blue.
2) Screen display but sound is not output
(2) Check follow
All input(mode)
is no sound?
No
Is VCC “+16.5V or +19.5V”
Normal?(JP1 : 1pin)
Yes
No
Replace Power Board.
Yes
Is the speaker Cable
normal?
normal?
No
Check the Speaker
Cable
Cable
Only HDMI is
no sound?
Download
the EDID data.
No
No
Only DTV is
no sound?
No
Yes
Check the Tuner In/Out
Yes
Only AV/component/PC
input is no sound?
No
Check the input source.
Yes
Replace Main Board.
- 31 -
6. Exterior view defectiveness
(1) Check follow
Damage LCD module?
Replace LCD Module
No
Damage cabinet?
No
Yes
Yes
Replace cabinet
Yes
Damage RCU?
Replace RCU.
No
Replace stand
Scratch Stand?
Yes
- 32 -
Standard Repair Process
1. Video error
(1) No video/Normal audio
(2) No video/No audio
(3) Picture broken/Freezing
Click on the first or last page to see other 32LF5700 service manuals if exist.