Sharp R-340A Service Manual

R-340A
16
Pin No. Signal I/O Description
36 P24 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal
while one of G6 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 P44 - P47 terminal
while one of G5 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 P44 - P47 terminal
while one of G4 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 P44 - P47 terminal
while one of G3 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 P44 - P47 terminal
while one of G2 line keys on key matrix is touched.
41-44 P17-P14 OUT Terminal not used.
45-47 P13-P11 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.)
P13 (45)......................... S16 (25) SEG 13 (59) ....................S20 (12)
P12 (46)......................... S15 (24) SEG 11 (61) ....................S21 (11)
P11 (47)......................... S14 (23) SEG 10 (62) ....................S22 (10)
SEG 24 (48)................... S13 (22) SEG 9 (63) ....................... S23 ( 9)
SEG 23 (49)................... S12 (21) SEG 8 (64) ....................... S24 ( 8)
SEG 22 (50)................... S11 (20) SEG 7 (65) ....................... S25 ( 7)
SEG 21 (51)................... S10 (19) SEG 6 (66) ....................... S26 ( 6)
SEG 19 (53)..................... S9 (18) SEG 5 (67) ........................ S 4 ( 5)
SEG 18 (54)..................... S8 (17) SEG 3 (69) ........................ S 3 ( 4)
SEG 17 (55)..................... S7 (16) SEG 2 (70) ........................ S 2 ( 3)
SEG 16 (56)..................... S6 (15) SEG 1 (71) ........................ S 1 ( 2)
SEG 15 (57)..................... S5 (14) SEG 0 (72) ........................S 0 ( 1)
SEG 14 (58)................... S19 (13)
48-51 SEG24-SEG21 OUT Segment data signal.
Signal similar to P13.
52 SEG20 OUT Terminal not used.
53-59 SEG19-SEG13 OUT Segment data signal.
Signal similar to P13.
60 SEG12 OUT Terminal not used.
61-67 SEG11-SEG5 OUT Segment data signal.
Signal similar to P13.
68 SEG4 OUT Terminal not used.
69-72 SEG3-SEG0 OUT Segment data signal.
Signal similar to P13.
73/74 VCC/VREF IN Connected to GND.
75 AVSS IN Connected to VC.
76 COM3 OUT Common data signal: COM3.
Connected to LCD signal C3 (Pin No. 29)
77 COM2 OUT Common data signal: COM2.
Connected to LCD signal C2 (Pin No. 28)
78 COM1 OUT Common data signal: COM1.
Connected to LCD signal C1 (Pin No. 27)
79 COM0 OUT Common data signal: COM0.
Connected to LCD signal C0 (Pin No. 26)
80 VL3 IN Power source voltage input terminal.
Standard voltage for LCD.

Sharp R-340A Specifications

General

Brand	Sharp
Model	R-340A
Category	Microwave Oven
Language	English