Check The Rf Part - Panasonic KX-TG4021LAT Service Manual

10.1.6. Check the RF part

10.1.6.1. Finding out the Defective part
After All the Checkings or Repairing
1. Re-register the checked handset to the checked base unit, and Regular HS to Regular BU.
Note:
(*1) HS: Handset
(*2) BU: Base Unit
KX-TG4021LAT/KX-TG4022LAT/KX-TG4023LAT/KX-TGA403LAT
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