Power Supply Unit Circuit Operation - Panasonic KX-TDA0103XJ Service Manual

8 POWER SUPPLY UNIT CIRCUIT OPERATION

The power unit supplies power to the various cards of the KX-TDA100, KX-TDA200 and KX-TDA600.
The functions of the power unit are listed below.
Function
DC voltage generation function
AC cutoff detection function
DC abnormality detection function
Overheating detection function
Two kinds of power supply unit are provided as an option depending on the card structure and the terminal structure for KX-
TDA100, KX-TDA200 and KX-TDA600.
This function generates four DC voltages (+40V, +30V, +15VPT, and +15V) from the AC power supply and
supplies them to the system.
This function detects any cutoff of AC power supply and outputs an AC alarm signal to the MPR card.
This function detects any abnormality in the DC voltage and outputs a DC alarm signal to the MPR card.
This function detects any overheating of the power unit and shuts down the power supply in order to
preserve the safety of the system.
KX-TDA0103XJ / KX-TDA0104XJ / KX-TDA0108XJ / KX-TDA0103X / KX-TDA0104X / KX-TDA0108X
Description
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