Panasonic KX-TG9333PK Service Manual page 24

KX-TG9333PK/KX-TG9334PK/KX-TGA931T
4.7.3. Charge Circuit
When the handset is put on the cradle of the base unit, the power is supplied from CHARGE+ and CHARGE- terminals to
charge the battery via R366 or Q361. The voltage between CHARGE+ and CHARGE- flows Q531 → pin 38 of IC501, where
the charge is detected. Then IC501 calculates the battery consumption amount from the previous charge, and it controls Q361/
Q362/Q364 by pin 42 of IC501 until charging is complete. When charging is complete, the control pattern is switched to Trickle
charging form from Operational charging form.
Charging form
4.7.4. Ringer and Handset SP-Phone
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