Panasonic KX-TG3721BXB Service Manual page 37

10.1.4.3. Charger Unit
Plug in the AC Power source.
Charge Handset on Charger Unit.
Is the voltage of two charge contacts about
3 V or more?
Check Charge Contacts at Charger Unit
from mechanical point of view.
Cross Reference:
Charge Circuit (P.21)
YES
NO
Check Charge Circuit of Charger Unit.
Check Handset.
37
KX-TG3721BX/KX-TG3722BX/KX-TGA371BX
OK