DOWNLOAD LG 32LF7300 Service Manual ↓ Size: 3.09 MB | Pages: 58 in PDF or view online for FREE

Model
32LF7300
Pages
58
Size
3.09 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
32lf7300.pdf
Date
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              - 25 -                                                         
4. In case of occur strange screen into specific mode
1) In case of does't display the OSD
(1) Symptom
1)
LED is blue.
2)
The minute discharge continuously becomes accomplished from module
(2) Check follow
Is the LVDS
Cable normal ?
Is normal the T-Con
Board of Module?
Yes
No
No
No
Yes
Is the LVDS cable 
connected well?
Check Power Board.
Replace T-Con Board
or LCD Module.
Cable inserts 
carefully.
No
Yes
Operates the 
U102(FLI10620H)?
Replace Main Board.
Replace 
U102(FLI10620H)
              - 26 -                                                         
2) In case of does't display the screen into specific mode
(1) Symptom
(1) The screen does not become the display from specific input mode
(RF, AV, Component, RGB, HDMI).
(2) Check follow
(1) Check the all input mode which is normal or not.
(3) In case of becomes unusual display from D/A mode
(4) In case of becomes unusual display from A/V mode
(5) In case of becomes unusual display from Component, RGB mode
Is normal the Tuner?
(DVB&ANALOG)
Is normal the 
U102(FLI10620H)
Yes
No
No
No
Yes
Is the Tuner cable 
connected well?
Is normal the Input voltage, 
I2C Communication and 
AV2 CVBS output?
Cable inserts well.
Yes
Is normal the Input voltage, I2C
Communication and HV sync?
Replace IC or Main 
Board.
No
Replace Tuner or Main 
Board.
Block  A
Is Video input of the AV 
Jack(JP17) normal?
Same as Block A
Yes
No
Check the input source.
No
Is R,G,B input and H,V sync 
of the JP8 normal?
Same as Block A
Yes
Check the input source.
              - 27 -                                                         
(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, I2C
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.
              - 28 -                                                         
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 “ +20V”
Normal?(JP1 : 1pin)
Yes
No
Replace Power Board.
Yes
Is the speaker Cable 
normal?
No
Check the Speaker
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.
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