Read Sharp R-642M Service Manual online
10
R-642M -
Pin No.
Signal
I/O
Description
38
R03
OUT
Oven lamp, fan motor and turntable motor driving signal.
To turn on and off shut off relay
(RY1). The square waveform voltage
is delivered to the RY1 driving circuit.
(RY1). The square waveform voltage
is delivered to the RY1 driving circuit.
39
P20
IN
Signal coming from tact switch.
When either of tact switches SW64-SW66 is touched, a corresponding
signal out of SEG1, SEG2 and SEG3 will be input into P20. When no tact
switch is touched, the signal is held at "H" level.
When either of tact switches SW64-SW66 is touched, a corresponding
signal out of SEG1, SEG2 and SEG3 will be input into P20. When no tact
switch is touched, the signal is held at "H" level.
40-41
P21-P22
OUT
Terminal not used.
42
P23
IN
Signal coming from tact switch.
When either of tact switches SW60-SW62 is touched, a corresponding
signal out of SEG0, SEG1, SEG2 and SEG3 will be input into P23. When no
tact switch is touched, the signal is held at "H" level.
When either of tact switches SW60-SW62 is touched, a corresponding
signal out of SEG0, SEG1, SEG2 and SEG3 will be input into P23. When no
tact switch is touched, the signal is held at "H" level.
43
INT0
IN
Signal synchronized with commercial power source frequency.
This is the basic timing for time
processing of LSI.
This is the basic timing for time
processing of LSI.
44
INT1
IN
Connected to VC. (-5V)
45
K02
IN
Connected to VC. (-5V)
46
K03
IN
To input signal which communicates the door open/close information to
LSI.
LSI.
Door open "L" level signal (-5V). Door close "H" level (0V)
47
COM0
OUT
Common data signal: COM0.
Connected to LCD. (C1)
Connected to LCD. (C1)
48
COM1
OUT
Common data signal: COM1.
Connected to LCD. (C2)
Connected to LCD. (C2)
49
COM2
OUT
Common data signal: COM2.
Connected to LCD. (C3)
Connected to LCD. (C3)
50
COM3
OUT
Terminal not used.
51
SEG0
OUT
Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to P23 terminal
while the tact switch SW60 is touched.
Signal applied to tact switch section. A pulse signal is input to P23 terminal
while the tact switch SW60 is touched.
52
SEG1
OUT
Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to P23 terminal
while the tact switch SW61 is touched.
Signal applied to tact switch section. A pulse signal is input to P23 terminal
while the tact switch SW61 is touched.
53
SEG2
OUT
Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to P23 terminal
while the tact switch SW63 or SW65 is touched. A pulse signal is input to
P20 terminal while the tact switch SW65 is touched.
Signal applied to tact switch section. A pulse signal is input to P23 terminal
while the tact switch SW63 or SW65 is touched. A pulse signal is input to
P20 terminal while the tact switch SW65 is touched.
54
SEG3
OUT
Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to P23 terminal
while the tact switch SW62 is touched. A pulse signal is input to P20 terminal
while the tact switch SW66 is touched.
Signal applied to tact switch section. A pulse signal is input to P23 terminal
while the tact switch SW62 is touched. A pulse signal is input to P20 terminal
while the tact switch SW66 is touched.
55-58
SEG4-
OUT
Terminal not used.
SEG7
59-63
SEG8-
OUT
Segment data signal.
SEG12
Signal is similar to SEG13. Connected to LCD.
64
NC
No connection terminal.
20.0 msec
H : 0V
L : -5V
(Grill or dual)
ON
OFF
During
cooking
L : -5V
0V
H :
DESCRIPTION OF LSI
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