Read Panasonic KX-NS0130X Service Manual online
8
KX-NS0130X
4.4.
Power Supply
Block Diagram
The STACK-M card uses two types of power supplies; +3.3V and +1.2V.
Since a power supply of +15V is supplied from the Main card, the power block consists of two types of devices; a DC/DC con-
verter converting +15V into +3.3V and series regulator converting +3.3V into +1.2V.
Since a power supply of +15V is supplied from the Main card, the power block consists of two types of devices; a DC/DC con-
verter converting +15V into +3.3V and series regulator converting +3.3V into +1.2V.
Protection of 3.3V output
The protection circuit consists of an output short protection and an overvoltage protection.
When an output of power supply is short, IC803 works to stop the output as the output short protection.
When +3.3V output become overvoltage caused by IC803 short (5-6pin), it is detected by D804.
When an output of power supply is short, IC803 works to stop the output as the output short protection.
When +3.3V output become overvoltage caused by IC803 short (5-6pin), it is detected by D804.
Click on the first or last page to see other KX-NS0130X service manuals if exist.