Read Panasonic KX-TU301RUME Service Manual online
14
KX-TU301RUME
8.1.1.
Check Power
8.1.1.1.
Handset
Cross Reference:
Power Supply Circuit (P.8)
8.1.2.
Check Battery Charge
8.1.2.1.
Handset
Cross Reference:
Check Power (P.14)
Charge Circuit (P.9)
Charge Circuit (P.9)
8.1.2.2.
Charger Unit
Cross Reference:
Power Supply Circuit (P.10)
Is the battery inserted to BAT+
and BAT-?
and BAT-?
Is the voltage of BAT 3.5V more?
No
Yes
Check the battery and around BAT+ and BAT-
are not shorted
are not shorted
Is the voltage of VRTC about
2.0V?
2.0V?
Yes
Is the voltage of VIO about 2.85V?
Check Power Supply Circuit.
No
Is the voltage of VSIM about
2.85V or 1.8V?
2.85V or 1.8V?
Insert TEST SIM card.
Check Fuse(F1) is shorted
Yes
Yes
Yes
No
No
Replace with a new Circuit Board.
Yes
Is Check Power OK?
Is CDT(R5) about 2V at charge
state?
state?
No
Yes
Check Charge Circuit.
No
Check Power
Plug in the AC Adaptor (PNLV226CE).
Charge Handset on Charger Unit.
Check Handset.
Is the voltage of charge contacts about 4.5V or more?
No
Check Charge Contacts at Charger Unit from
mechanical point of view.
mechanical point of view.
Yes
Check Power Supply Circuit
of Charger Unit.
of Charger Unit.
Yes
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