Check Link - Panasonic KX-TG8421HGN Service Manual

9.1.3.

Check Link

9.1.3.1. Base Unit
Note:
(*1) Refer to Troubleshooting by Symptom (Base Unit and Charger Unit) (P.48)
Cross Reference:
Check Point (Base Unit) (P.48)
Power Supply Circuit (P.9)
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KX-TG8421HGN/KX-TGA840FXN