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The above block diagram shows the main sections
of the Power Supply circuitry. As in previous mod-
els, two types of DC supplies are generated, Standby
and Switched. Standby supplies are generated as
long as the TV is connected to an AC power source.
Switched supplies are activated when the TV is
switched On.
Switch Mode Regulators are the source for both types
of supplies. An additional Standby source is used to
supply power to the DM Module in the V19/V21 chas-
Chapter 5
Power Supply
sis. The DM Power Supply is internal to the DM Mod-
ule. It receives power from the Standby 12V supply
and generates DM 3.3V and DM 5V supplies. The
two DM supplies fall into the Standby category and are
present as long as the TV is plugged in.
The Standby and Switched supplies shown in the dia-
gram are only those directly generated by the Switch
Mode Regulators. Additional DC supplies are gen-
erated from those shown above.
5-1
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