KX-NS0180X - Panasonic PBX Service Manual (repair manual). Page 21

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21
KX-NS0180X
• +80V/-55V Converter
Circuit configuration of -55V converter is same as +80V.
 In event of an over current in the 15V input line, due to a short circuit in the MOSFET Q704/Q705 switches,  power supply is
shut down.
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