Sharp R-343GM, Service Manual

Page: 9 / 24

R343M - 9
HIGH
H : +5V
L : 0V
H : +5V
L : 0V
MEDIUM
HIGH
ON
ON
OFF
OFF OFF
24 sec.
8 sec.
A
B
0.1 sec.
2 sec.
H : +5V
L: 0V
H : +5V
L: 0V
1-12 SEG0 - OUT Segment data signal.
SEG11 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 (1) .............................. S12(4)
SEG 6 (7)
S6(10)
SEG 1 (2) .............................. S11(5)
SEG 7 (8)
S5(11)
SEG 2 (3) .............................. S10(6)
SEG 8 (9)
S4(12)
SEG 3 (4) ................................ S9(7)
SEG 9 (10)
S3(13)
SEG 4 (5) ................................ S8(8)
SEG 10 (11)
S2(14)
SEG 5 (6) ................................ S7(9)
SEG 11 (12)
S1(15)
13 R60 OUT Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to R81 terminal while
the tact switch SW4 or the tact switch SW5 is touched.
14 R61 OUT Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to R81 terminal while
the tact switch SW3 or the tact switch SW7 is touched.
15 R62 OUT Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to R81 terminal while
the tact switch SW2 or the tact switch SW6 is touched.
16 R63 OUT Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to R81 terminal while
the tact switch SW1 is touched.
17 AIN0 IN To input signal which communicates the door open/close information to
LSI.
Door close "L" level signal (0V). Door open "H" level (+5V)
18-20 AIN1-AIN3 IN Terminal to change functions according to the Model.
By using the A/D converter contained in the LSI, DC voltage in accordance with
the Model in operation is applied to set up its function.
21 VSS IN Power source voltage: 0V.
VSS voltage of power source circuit input.
22 R70 OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2).
The signals holds "L" level during micro-
wave cooking and "H" level while not
cooking. In other cooking modes (vari-
able cooking) the signal turns to "H"
level and "L" level in repetition accord-
ing to the power level.
23 R71 OUT Signal to sound buzzer (2.0 kHz).
A: key touch sound.
B: Completion sound.
DESCRIPTION OF LSI
LSI(IZA919DR)
The I/O signal of the LSI(IZA919DR) are detailed in the following table.
Pin No. Signal I/O Description