Read LG 50PG7500-ZB (CHASSIS:PD82A) 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 mode
Is the Tuner normal?
Is the CXA2069Q normal?
Is the Tuner Cable connected?
Re-insert the Cable.
Yes
No
No
Yes
Is the FIL8548 normal?
Replace the Tuner.
No
Is the Input voltage, IIC Communication
and CVBS output normal?
Yes
Is the Input voltage, IIC
Communication normal?
No
Replace the IC.
No
Is normal the Input voltage, IIC
Communication?
No
Block A
Replace the IC.
No
Is the Video input of the AV
Jack(JK1203)normal?
Yes
Is the CXA2069Q normal?
Check the input source and Cable
No
Is the Input voltage, IIC
Communication normal?
No
Replace the IC.
No
Yes
Same as Block A
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