Panasonic TH-42PX20U Service Update Information page 27

Figure 14
After the scan waveform is developed on the SC Board, it is applied to the SU
and SD boards for de-multiplexing. The signal is input to a series of shift registers
inside the PDP scan driver IC. Figure 14 shows an example of the de-
multiplexing circuit. There are six driver ICs on the SU board and six on the SD
board.
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