Power Supply; Power Supply (Tc-22Lr30) - Panasonic TC-26LX20 Technical Manual

Power Supply

Power Supply (TC-22LR30)

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 15 volts source that feeds this circuit (DC
to AC inverter). However, the TC-26/32LX20 and TC-32LH models use 120 volts as
input for the backlight circuitry of their LCD panel.
The AP Board is responsible for supplying all secondary voltages required for
operation. Modifications were made on the TC26/32LX20 models AP board to
accommodate the voltages required to power up the DVD RAM, which was basically
added to the TC-26/32LX20 to make it into a combo unit (TC-22LR30).
P Board TC-22LR30 Combo Model
Figure 12
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