LG 50PC1DA Service Manual page 20

2-2. In case of there is no display on the screen in specific modes
(1) Symptom
1) There is no screen display from a specific input mode
(RF, AV, Component, RGB, DVI).
(2) Check following
1) Check the all input mode should become normality display.
2) 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 an unusual display in TV mode RF mode
Is the Tuner normal?
Yes
Is the CXA2069Q
normal?(IC300)
Yes
Is the FIL8532(IC800)
normal?
(4) In case of an unusual display in TV mode AV mode
Is the CXA2069Q
normal?
Yes
Is the FIL8532
normal?
(5) In case of an unusual display in TV mode Component, RGB-DTV/ PC mode
Is the FIL8532
normal?
(6) In case of an unusual display in TV mode HDMI mode
Is the Sil9011
normal?
Yes
Is the FIL8532
normal?
No
Is the Tuner Cable
connected?
No
Re-insert the cable
Are the Input voltage, IIC
No
Communication and HV sync
normal?
No
Are the Input voltage, IIC
Communication and HV sync
normal?
Are the Input voltage, IIC
No
Communication and HV sync
normal?
Are the Input voltage, IIC
No
Communication and HV sync
normal?
Are the Input voltage, IIC
No
Communication and HV sync
normal?
Are the Input voltage, IIC
No
Communication and HV sync
normal?
Are the Input voltage, IIC
No
Communication and HV sync
normal?
Yes
Are the Input voltage, IIC Communication
No
No
No
No
No
No
No
- 20 -
and CVBS output normal?
No
Replace the Tuner.
Replace the IC.
Replace the IC.
Replace the IC.
Replace the IC.
Replace the IC.
Replace the IC.
Replace the IC.