Read Panasonic KX-T7735RU / KX-T7735RUPP (serv.man2) Service Manual online
8 CIRCUIT OPERATIONS
8.1. KEY INPUT CONTROL CIRCUIT
Sequential input information is executed by dynamic scanning.
The ports R20~R23, R30, R31 of IC1 are brought to high status consecutively.
If a key is pressed, the key-in information input is executed by ports R00~R03, R10~R13, RA0, RA1.
The ports R20~R23, R30, R31 of IC1 are brought to high status consecutively.
If a key is pressed, the key-in information input is executed by ports R00~R03, R10~R13, RA0, RA1.
10
KX-T7735RU-B
Click on the first or last page to see other KX-T7735RU / KX-T7735RUPP (serv.man2) service manuals if exist.