SU Board Isolation
The 2008 and 2009 plasma models are now designed not to
Unplugging SC41/SU41, SU11/SD11, and SC42/SD42, opens the interlocked connection between VF_GND and CHA on the SC board. This floats point “CHA” and a high is output to connector SC20 triggering shutdown.
To isolate the SU board:
•Remove the 2 VF_GND screws on the SU board only.
•Unplug connector SC41 on the SC board and SU11 on SU board.
•Place a jumper between pins 1 and 2 of the empty connector SC50.
Note: This procedure could be useful when troubleshooting 7 blinks problems.
Slide #64