LG Electronics 42LG6000, 42LG6000-ZA, 42LG6100, 42LG6100-ZB 2) In case of abnormal display on the screen in specific mode, In case of abnormal display on the screen when RF mode., Block A In the case of abnormal display on the screen when USB mode.

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Only for training and service purposes
LGE Internal Use Only
C2008
2) In case of abnormal display on the screen in specific mode
Symptom
1) The scr een 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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