Zenith P42W46X Service Manual - Page 19

TROUBLE SHOOTING GUIDE 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 follow ¯ 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 No Is normal the Tuner? Is the Tuner Cable connected well? Yes No Yes Cable inserts well. Is normal the Input voltage, IIC Communication and CVBS output? No Replace Tuner Is normal the CXA2069Q? Yes Is normal the VPC3230? No Is normal the Input voltage, IIC No Communication and HV sync? No Is normal the Input voltage, IIC No Communication and HV sync? Replace IC Replace IC (4) In the case of becomes unusual display from RF, AV mode Is normal the CXA2069Q? Yes No Is normal the Input voltage, IIC No Communication and HV sync? Is normal the VPC3230? No Is normal the Input voltage, IIC No Communication and HV sync? Replace IC Replace IC - 19 -