Read Panasonic KX-T7735UA / KX-T7735UAPP (serv.man2) Service Manual online
9.3. SPEAKER-PHONE TROUBLE
9.4. TONE DIAL TROUBLE
19
KX-T7735UA / KX-T7735UA-B
Click on the first or last page to see other KX-T7735UA / KX-T7735UAPP (serv.man2) service manuals if exist.