Panasonic KX-PRX120W Service Manual page 27

YES
Is the Frequency Drift OK?
Refer to Check Point...(L).
YES
Is the Sensitivity Receiver OK?
Refer to Check Point...(M).
YES
Is the Timing OK?
Refer to Check Point...(N).
YES
Is the Power RAMP OK?
Refer to Check Point...(O).
Cross Reference:
Check Point (Base Unit) (P.36)
9.1.2.2. Handset
Does Handset make link with Base Unit?
(Correct working unit)
Clean the DECT antenna contact.
Did the problem fix?
Replace a new lower cabinet assy (*).
Did the problem fix?
* DECT antenna is placed on the lower cabinet.
NO
NO
YES
Update software.
Did the problem fix?
NO
Replace with a new circuit
board
NO
NO
NO
Replace with a new Circuit Board.
NO
YES
Handset is OK. Check Base Unit.
YES
End
YES
End
End
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KX-PRX120W/KX-PRXA10W