Power Supply Unit; Block Diagram And Circuit Description Of; Psu; Ac Input, Rectification Smoothing Circuit - Panasonic KX-NS500AG Service Manual

KX-NS500AG
4.5.

Power Supply Unit

This unit is switching regulator power supply and supplies DC voltages to DCPU Board (MPR), and optional card (free slot).
PSU (power supply unit) has two outputs (41V, 15V). 15V output is supplied only in DCPU Board (MPR) and option card. Other
outputs are mainly used as an object for the electric supply to a terminal.
4.5.1. Block Diagram and Circuit Description of PSU
4.6.

AC input, Rectification Smoothing Circuit

1) Filter Circui
This circuit consists of the following components and removes the exogenous noise or the noise generated at power supply.
C1, C2: normal mode filter (X condenser)
L1, L2: common mode noise filter
C3, C4: common mode noise filter (Y condenser)
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