Slide 63
Method To Turn On the Panel Drive Circuit Only (A Board is Isolated)
It’s possible to have the “Panel Drive Section” running with the “Signal Processing Section” (A board)
disconnected.
By separating the 2 sections, it could be determined if the symptom on the TV is created by the A
board or one of the boards on the Panel Drive Section.
Note: Disconnecting D3/A32 and D5/A31 allows the TV to turn on by itself with a white screen after
it is plugged in to the AC line. This procedure does not disable the A board.
To completely disable the A board:
1. Unplug the TV.
2. Remove connectors P6 and P7 from the power supply. (See note on previous slide.)
3. Plug in the TV (Do not press the power button).
• The TV partially turns on by itself.
• The screen stays black.
• No fan operation.
• The LEDs on the SS board and SC board are on.
To force the TV to display a white screen:
1. Unplug the TV.
2. With P6 and P7 disconnected, disconnect D5 from the from the D/A board.
3. Plug in the TV.
4. Now the TV turns on by itself with a white screen.
Slide 63
