LG 42PX4DV, Service Manual

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5-2. In case of does’t display the screen into specific mode
(1) Symptom
¯
The screen does not become the display from specific input mode
(RF, AV, Component, RGB, DVI).
(2) Check following
¯
Check the all input mode should become normality display.
¯
Check the Video(Main)/Data(Sub), Video(Main)/Video(Sub) should become
normality display from the PIP mode or DW mode. (Re-Check it Swap)
(3) In case of becomes unusual display from RF mode
(4) In the case of becomes unusual display from RF, AV mode
(5) In the case of becomes unusual display from Component, RGB mode
(6) In the case of becomes unusual display from HDMI mode
Is the Tuner normal?
Is the CXA2069Q
normal?
Is the Tuner Cable
connected well?
Cable inserts well.
Yes
No
No
Yes
Is the FIL8532
normal?
Replace the Tuner
No
Is the Input voltage, IIC Communication
and CVBS output normal?
Yes
Is the Input voltage, IIC
Communication and HV sync
normal?
No
Replace the IC
No
Is the Input voltage, IIC
Communication and HV sync
normal?
No
Replace the IC
No
Is the CXA2069Q
normal?
Yes
Is the FIL8532
normal?
Is the Input voltage, IIC
Communication and HV sync
normal?
No
Replace the IC
No
Is the Input voltage, IIC
Communication and HV sync
normal?
No
Replace the IC
No
Is the FIL8532
normal?
Is the Input voltage, IIC
Communication and HV sync
normal?
No
Replace the IC
No
Is the Sil9011
normal?
Yes
Is the FIL8532
normal?
Is the Input voltage, IIC
Communication and HV sync
normal?
No
Replace the IC
No
Is the Input voltage, IIC
Communication and HV sync
normal?
No
Replace the IC
No