Panasonic KX-TG3531BXS Service Manual page 24

KX-TG3531BXS/KX-TG3531BXB/KX-TG3532BXS/TG3532BXB/KX-TGA351S/KX-TGA351B
4.8.3. Charge Circuit
When the Handset is put on the cradle of the Base unit or the charger, the power is supplied from CHARGE+ and CHARGE- ter-
minals to charge the battery via D361 and R366 or Q361. The voltage between CHARGE+ and CHARGE- flows R531 → Q531
→ pin38 of IC501, where the charge is detected. Then IC501 calculates the battery consumption amount from the previous
charge, and it controls Q361/Q362/Q363 by pin80 of IC501 until charging is complete. When charging is complete, the control
pattern is switched to Trickle charging form from Operational charging form.
4.8.4. Ringer and Handset SP-Phone
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