Vertical line problems
Figure 57
Thin vertical line or no picture in one block
A thin vertical line or picture in ¼ of the area driven by a C board indicates a defective
driver IC that is mounted on the ribbon cable that connects the C board to the panel. To
resolve this problem the panel has to be replaced.
A number of blocks do not light up
The likelihood of all four driver ICs of the panel being defective is very small. Such a
defect usually indicates that the C board may be defective or the D board may not be
providing the drive data for the C board. To resolve this problem, replace the C board
first. If the problem persists, replace the D board.
71
Summary of Contents for TH-42PX50U
Page 40: ...SC board Waveform Figure 30 SU And SD Board Shift Registers Figure 31 35 ...
Page 43: ...SS Board Schematic Figure 33 SS Board Waveform Figure 34 38 ...
Page 66: ...Adjustment Volume Locations Figure 53 61 ...
Page 67: ...Test Point Locations Figure 54 62 ...
Page 71: ...Scan and Sustain Drive Waveform Figure 55 Scan and Sustain Drive Check points Figure 56 66 ...