Service manual

R-55TS-F
24
Pin No. Signal I/O Description
43 P15 OUT
Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to P24 - P27 terminal while one
of tact swithes (SW9, SW10. SW11, SW12) on matrix is touched.
44 P14 OUT
Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to P24 - P27 terminal while one
of tact swithes (SW13, SW14. SW15) on matrix is touched.
45-48 P13-P10 IN Terminal not used.
49-56 P07-P00 OUT Terminal not used.
57-59 P37-P35 IN Terminal not used.
60-72
SEG12-SEG0 OUT Segment data signal.
Connected to LCD.
The relation between signals are as follows:
LSI signal (Pin No.) LCD (Pin No.) LSI signal (Pin No.) LCD (Pin No.)
SEG 0 (72) ......................... SEG0 SEG7 (65) ....................... SEG7
SEG 1 (71) ......................... SEG1 SEG8 (64) ....................... SEG8
SEG 2 (70) ......................... SEG2 SEG9 (63) ....................... SEG9
SEG 3 (69) ......................... SEG3 SEG10 (62) ................... SEG10
SEG 4 (68) ......................... SEG4 SEG11 (61) ................... SEG11
SEG 5 (67) ......................... SEG5 SEG12 (60) ................... SEG12
SEG 6 (66) ......................... SEG6
73 VCC IN Connected to GND.
74 VREF IN Connected to GND.
75 AVSS IN Connected to VC.
76 COM3 OUT Terminal not used.
77 COM2 OUT
Common data signal.
Connected to LCD (COM2).
78 COM1 OUT
Common data signal.
Connected to LCD (COM1).
79 COM0 OUT
Common data signal.
Connected to LCD (COM0).
80 VL3 IN
Power source voltage input terminal.
Standard voltage for LCD.