Su/Sd Board Isolation Procedure - Panasonic TH-42PZ80U Technical Manual

SU/SD Board Isolation Procedure

Unlike previous models of Panasonic Plasma TVs, the 2008 models are designed not to turn-on if either of the SU and
SD boards is disconnected. Disconnecting either causes the unit to shutdown and the power LED to blink 7 times.
Procedure to isolate the SU/SD board
For SU board: Disconnect connectors SC41/SU41, SU11/SD11.
For SD board: Disconnect connectors SC42/SD42, SC46/SD46, and
SU11/SD11.
Isolating the SU/SD board does not require the removal of its mounting
screws.
Place a jumper between "VF Ground" (labeled H.V. DANGER) on the SU
board or SD board and coil L801 on the SC board, see figure 6 and 7.
The jumper can be connected to the floating ground screws on the SU
board, which are located above and below connector SU41, see figure 2.
Caution: Before turning the unit on, confirm that the jumper is not
connected to a chassis ground screw, as this will cause severe damage
to the unit. Confirm proper connection by measuring continuity
between floating ground and chassis ground. The resistance should be
in the kilo-ohms range.
Figure 6
20
Figure 7