Panasonic TC26LX20 - 26" LCD TV, Техническое руководство

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Power Supply (TC-26/32LX20)
The power source for all models is comprised of a Primary and Secondary power
supply. The
P Board is responsible for generating the primary source voltage used to
supply power to the secondary power supply, located on the AP board. It also supplies
the voltage that feeds the backlighting circuitry, which is incorporated on the LCD panel.
Newer models such as the TC-22LR30 use a 15volt source that feeds this circuit (DC to
AC inverter). However, the TC-26/32LX20 and TC-32LH models use 120 volts as input
to this circuit.
P board (TC-32LH, TC-26/32LX20) - Primary Power
The Primary power supply is responsible for generating the following:
The primary source voltage (24 volts) for the secondary power supply
The 7-volt standby voltage for the system control circuit
Backlighting voltage 120 Volts for the TC-32LH, TC-26/32LX20
P board_ Primary and Standby Voltage Source TC-32LH, TC-26/32LX20
Figure 18
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