LG 32LC2DC Service Manual page 18

3-2. 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.
(3) Abnormal display in RF mode
Is the Tuner normal?
Yes
Is IC103 (Switch)
CXA2069Q good?
Yes
Is the Video Decoder
IC302 UPD64011
good?
(4) Abnormal display in AV mode
Is IC103 (Switch)
CXA2069Q good?
Yes
Is the Video Decoder
IC302 UPD64011
good?
No
Is the Tuner Cable
connected well?
No
Reset cable.
No
Are the Input voltage, IIC
Comm. and HV sync good?
No
Are the Input voltage, IIC
Comm. and HV sync good?
No
Is normal the Input voltage, IIC
Communication and HV sync?
No
Are the Input voltage, IIC
Comm. and HV sync good?
Yes
Are the Input voltage, IIC Comm.
and CVBS outputs good?
No
No
No
No
- 18 -
No
Replace Tuner
Replace IC103
Replace IC302
Replace IC103
Replace IC302