LG 37LG6000 (CHASSIS:LD89D) Service Manual ▷ View online
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C
2008
2) In case of abnormal display on the screen in specific mode
Symptom
1) The screen does not display the picture from specific input mode
(RF,DTV, AV, Component, RGB, HDMI).
Check the followings
Is the input voltage and CVBS output
for the tuner OK?
Is the tuner OK?
In case of abnormal display on the screen when RF mode.
Is the RF cable
connected with TV set?
Connect the RF cable.
Replace the tuner.
Is IC100(FLI106X0H) OK?
Is the IIC communication waveform
between the tuner and IC100 OK?
Replace IC100(FLI106X0H)
No
Yes
No
No
No
No
Yes
Block A
In the case of abnormal display on the screen when USB mode.
Is USB 5V Power OK?
Yes
No
Replace IC902
Is USD DP/DM
waveform OK?
No
Same as Block A
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In the case of abnormal display on the screen when side AV1,2 / AV3 mode.
Same as Block A
In the case of abnormal display on the screen when Component, RGB mode.
In the case of abnormal display on the screen when HDMI1,2,3 mode.
Is the HDMI switch
(IC200) OK?
Is the TMDS waveform between
the IC and HDMI jacks OK?
Replace IC200
No
No
Yes
Is video input of the AV
(JK100,JK101,JK103) OK?
Yes
No
Check the input source.
Is R,G,B input and H/V
sync of the JK102,P101 OK?
Yes
No
Check the input source.
Same as Block A
Same as Block A
In the case of abnormal display on the screen when HDMI4 mode.
Is the HDMI Jack
(JK204) OK?
Is the TMDS waveform between
the IC and HDMI jacks OK?
Replace JK204
No
No
Yes
Same as Block A
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No
Yes
Is All input (mode)
no sound?
no sound?
Is Only HDMI
no sound?
Is the output speaker
turned on?
No
Set the output speaker on.
Download the EDID data.
No
Is a speaker
cable connected?
No
Connect the speaker cable.
Yes
Yes
Is Only RF no sound?
No
Check the tuner
SIF, AM Audio Input.
IC603 is OK?
No
Replace IC603 (MSP4458).
Yes
IC600 is OK?
No
Replace IC600(NTP3000A).
Yes
Replace VSC board.
Yes
5. In case of no sound
Symptom
1) LED is green
2) Screen display but sound is not output
2) Screen display but sound is not output
Check follow
C
2008
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BLOCK DIAGRAM
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