Power On Operation (Th-42Px25U); Th-42Px25U-P Cpu Requirements And Standby Circuit - Panasonic GP6DU Technical Manual

Power On Operation (TH-42PX25U)

TH-42PX25U-P CPU Requirements and Standby Circuit.

Refer to figure 24. When the unit is plugged into the AC line, the PF board provides
filtered AC voltage to the P-board through the connectors PF2 and P9. The AC is
applied to a standby circuit (D404, T410 and IC409) where the standby 7V is generated.
This voltage is applied to the 5V regulator circuit (Q552 and Q537) to generate the
standby 5V.
The standby 5V is applied to the microprocessors on the D-board (IC9701 and IC9709).
This voltage is also routed through the PA-board, to the microprocessor on the DG
board (IC001). 5V are also applied to the EEPROM and the remote receiver sensor.
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