Read LG 50PG60UD-DA (CHASSIS:PT81A) Service Manual online
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5-2. 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, DVI).
(2) Check following
1) Check the all input mode should become normality display.
(3) In case of becomes unusual display from RF mode
(4) In the case of becomes unusual display from side S-video/AV mod
Is the Tuner normal?
Is the RF cable connected with TV
Set?
Connect the RF cable.
Yes
No
No
Is the IC100(FLI106X0H)
normal?
Replace the Tuner(TU301).
No
Is the Input voltage, IIC Communication
and CVBS output normal?
Yes
Is the IIC communication waveform
between the tuner and IC100 normal?
No
Block A
Replace the
IC100(FLI106X0H).
No
Is the Video input of the AV
(JK105, JK106) normal?
Check the input source
No
Same as Block A
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