Service manual

20
R-508CK
R-510CK
R-510CW
34 P26 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P41, P43, P44 and P45
terminal while one of G7 line keys on key matrix is touched.
35 P25 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P41, P43, P44 and P45
terminal while one of G6 line keys on key matrix is touched.
36 P24 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P41, P43, P44 and P45
terminal while one of G5 line keys on key matrix is touched.
37 P23 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P41, P43, P44 and P45
terminal while one of G4 line keys on key matrix is touched.
38 P22 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P41, P43, P44 and P45
terminal while one of G3 line keys on key matrix is touched.
39 P21 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P41, P43, P44 and P45
terminal while one of G2 line keys on key matrix is touched.
40 P20 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN0, P41, P43, P44 and
P45 terminal while one of G1 line keys on key matrix is touched.
41-48 P17-P10 OUT Terminal not used.
49-50 P07-P06 OUT Terminal not used.
51-72 SEG21-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 21 (51) .................................... S1 SEG 10 (62) ................................. S12
SEG 20 (52) .................................... S2 SEG 9 (63) ................................. S13
SEG 19 (53) .................................... S3 SEG 8 (64) ................................. S14
SEG 18 (54) .................................... S4 SEG 7 (65) ................................. S15
SEG 17 (55) .................................... S5 SEG 6 (66) ................................. S16
SEG 16 (56) .................................... S6 SEG 5 (67) ................................. S17
SEG 15 (57) .................................... S7 SEG 4 (68) ................................. S18
SEG 14 (58) .................................... S8 SEG 3 (69) ................................. S19
SEG 13 (59) .................................... S9 SEG 2 (70) ................................. S20
SEG 12 (60) .................................. S10 SEG 1 (71) ................................. S21
SEG 11 (61) .................................. S11 SEG 0 (72) ................................. S22
73/74 VCC/VREF IN Connected to GND.
75 AVSS IN Connected to VC.
76 COM3 OUT Terminal not used.
77 COM2 OUT Common data signal: COM1.
Connected to LCD signal C1.
78 COM1 OUT Common data signal: COM2.
Connected to LCD signal C2.
79 COM0 OUT Common data signal: COM3.
Connected to LCD signal C3.
80 VL3 IN Power source voltage input terminal.
Standard voltage for LCD.
Pin No. Signal I/O Description