Panasonic KX-T2373MXW Service Manual page 22

KX-T2373MXW
11.3.4. Inializing Circuit
11.3.4.1. Function
This circuit is used for to initialize the microcomputer when it incorporates batteries.
11.3.4.2. Circuit operation
When the batteries is inserted into the unit, then the voltage is shifted by D304 and power is supplied to the CPU. The set can
operate beyond point A in the circuit voltage diagram.
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