Panasonic Viera TC-L42D2, Technical Manual

Page: 41 / 97

Slide # 41
Troubleshooting TCON Problems
Video Process (A-Board) defect:
Video signals received by the video process circuits are handled on a frame-by-frame basis. It is
almost impossible for the video process circuits to cause a symptom on a specific area of the screen.
Failures on the video process board usually presents themselves as distortions, color level shifts,
video level shifts or noise that affects the entire picture. The TCON can develop symptoms that seem
to be video process related but the video process circuits will not provide symptoms that would be
mistaken for a failed TCON circuit.
A21
TC05
LVDS
CONNECTOR
LVDS cable defect
Although problems with the LVDS cable or connectors can
cause symptoms that resemble TCON failures, they
usually tends to be intermittent and wiggling of the
connectors will likely cause a change in the symptom on
the screen.