Panasonic KX-TG2873BXS Service Manual page 16

KX-TG2873BXS/KX-TGA280BXS
Power Supply Circuit
4.5.2.
Circuit Operation:
When power on the Cordless Handset, the voltage is as follows;
BATTERY(2.2 V ~ 2.6 V: J1) → L502 → L300, D300 → Q300 (3.4 V) → Q302 (1.8 V), Q301 (2.5 V)
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