Panasonic TH42PX20U - 42" HDTV PLASMA DISPLAY, Service Update Information, Page: 26 / 70

Figure 13
The SC Board consists of buffers and drivers used to generate the scan signals
to the panel. The buffers provide isolation between the D board and the drivers.
Connector SC20 provides the drive voltages (140V, 100V and 18V) as well as
the trigger signals to switch the FET transistors. The D board switches the FETs
on and off to create the distinctive scan signal. Each trigger signal switches a
drive FET creating a portion of the waveform. For example, applying the CPH
signal to the 140V FET creates the peak portion of the waveform, see figure 12.
26