Read LG 26LC7D (CHASSIS:LB73A) Service Manual online
- 15 -
2-2. 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.
2) Check the Video(Main)/Data(Sub), Video(Main)/Video(Sub) should become
2) Check the Video(Main)/Data(Sub), Video(Main)/Video(Sub) should become
normality display from the PIP mode or DW mode.(Re-Check using Swap function)
Check the NEC64015(IC701) if the main picture is abnormal, and
Check the NEC64015(IC801) If the sub picture is abnormal.
Check the NEC64015(IC801) If the sub picture is abnormal.
(3) When Analog TV mode is abnormal
(4) When AV mode is abnormal
Is the Splitter normal?
Is the Flat Cables
normal?
Replace Flat Cables.
Is the Tuner Cable
connected well?
Cable inserts well.
Yes
No
No
Yes
Is the CXA2069Q(IC100)
normal?
Replace the Tuner.
No
Is the Input voltage, IIC Communication
and CVBS output normal?
No
Is normal the Input voltage, IIC
Communication and HV sync?
No
Replace the IC.
No
Yes
Is the uPD64015
normal?
Is normal the Input voltage, IIC
Communication and HV sync?
Is the Input voltage, IIC Communication
and HV sync normal?
and HV sync normal?
Is the Input voltage, IIC Communication
and HV sync normal?
and HV sync normal?
No
Replace the IC.
No
Is the CXA2069Q
normal?
Yes
Is the uPD64015
normal?
No
Replace the IC.
No
No
Replace the IC.
No
Is the Input voltage, IIC Communication
and HV sync normal?
and HV sync normal?
Yes
Is the Scaler normal?
No
Replace the IC.
No
Yes
Click on the first or last page to see other 26LC7D (CHASSIS:LB73A) service manuals if exist.