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Overall Power Block (Figure 4)
AC power is input to the set via the AC Input panel. The AC Input panel produces the raw DC for
the Main supply located on the LSB (Large Signal Board) and the Standby supply located on the AC
Input panel. When the set is in the Standby mode, the Standby supply produces a +5VSTBY supply.
The standby voltage is fed to the Processor on the SSB (Small Signal Board) via the SSM (Small
Signal Module). When the set is turned On, the Processor on the SSB switches the Standby line
Low. The +15, +5.2, and +9 volt supplies to the SSM are switched On. The +5.2 volt, 3.5-volt, +15
volt, and +4.5-volt supplies to the Power Interface board are also switches On. The Processor on
the SSB also switches the Power Interface supplies On via the Power On/Off control line. The
Power interface board then produces 3.3 volt, 2.5 volt, 12 volt, 1.2 volt, and 5.2 volt supplies to the
ATSC module.
FIGURE 4 - OVERALL POWER BLOCK
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