Read Panasonic KX-FC233RU-T / KX-FC233UA-T Service Manual online
7.7.14. Cordless Section
7.7.14.1. Check Power of Handset
CROSS REFERENCE:
Power Supply Circuit/Reset Circuit (P.193)
7.7.14.2. Check Battery Charge
7.7.14.2.1. Cordless Base Unit
CROSS REFERENCE:
Charge Circuit (P.193)
127
KX-FC233RU-T / KX-FC233UA-T