Read Sharp R-238ASL (serv.man9) Service Manual online
R238A(SL)
9 – 2
24
COM2
OUT
Common data signal.
Connected to LCD signal C3.
Connected to LCD signal C3.
25
COM3
OUT Terminal not used.
26-37
SEG0-SEG11
OUT
Segment data signal.
Connected to LCD.The relation between signals are as follows:
LSI signal (Pin No.) LCD (segment) LSI signal (Pin No.) LCD (segment)
SEG 0 (26) ----------------- S 1 SEG 6 (32) ----------------- S 7
SEG 1 (27) ----------------- S 2 SEG 7 (33) ----------------- S 8
SEG 2 (28) ----------------- S 3 SEG 8 (34) ----------------- S 9
SEG 3 (29) ----------------- S 4 SEG 9 (35) ----------------- S10
SEG 4 (30) ----------------- S 5 SEG 10 (36) ---------------- S11
SEG 5 (31) ----------------- S 6 SEG 11 (37) ---------------- S12
Connected to LCD.The relation between signals are as follows:
LSI signal (Pin No.) LCD (segment) LSI signal (Pin No.) LCD (segment)
SEG 0 (26) ----------------- S 1 SEG 6 (32) ----------------- S 7
SEG 1 (27) ----------------- S 2 SEG 7 (33) ----------------- S 8
SEG 2 (28) ----------------- S 3 SEG 8 (34) ----------------- S 9
SEG 3 (29) ----------------- S 4 SEG 9 (35) ----------------- S10
SEG 4 (30) ----------------- S 5 SEG 10 (36) ---------------- S11
SEG 5 (31) ----------------- S 6 SEG 11 (37) ---------------- S12
38-40
SEG12-SEG14 OUT Terminal not used.
41
P70
OUT
Oven lamp, fan motor and turntable motor driving signal
To turn on and off shut off relay (RY1). The square wave-
form voltage is delivered to the RY1 driving circuit and
RY2 control circuit.
To turn on and off shut off relay (RY1). The square wave-
form voltage is delivered to the RY1 driving circuit and
RY2 control circuit.
42
P71
OUT Terminal not used.
43
P72
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The signals
holds “L” level during microwave cooking and “H” level
while not cooking. In other cooking modes (variable
cooking) the signal turns to “H” level and “L” level in
repetition according to the power level.
To turn on and off the cook relay (RY2). The signals
holds “L” level during microwave cooking and “H” level
while not cooking. In other cooking modes (variable
cooking) the signal turns to “H” level and “L” level in
repetition according to the power level.
44
AVDD
IN
A/D converter power source voltage.
The power source voltage to drive the A/D converter in the LSI. Connected to GND.
The power source voltage to drive the A/D converter in the LSI. Connected to GND.
45-48
AIN5-AIN2
IN
Terminal to change cooking input 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 cooking constant.
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 cooking constant.
49-50
AIN1-AIN0
IN
This is the terminal to detect the voltage of the signal coming from the touch key.
51
AVSS
IN
A/D converter power source voltage.
The power source voltage to drive the A/D converter in the LSI.
The power source voltage to drive the A/D converter in the LSI.
52
P11
IN
To input signal which communicates the door open/close information to LSI.
Door close “H” level signal (0V). Door open “L” level signal (-5V)
Door close “H” level signal (0V). Door open “L” level signal (-5V)
53
P10
OUT Terminal not used.
54
P33
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G1
line keys on key matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G1
line keys on key matrix is touched.
55
P32
OUT Terminal not used.
56
P31
OUT Terminal not used.
57
INTP0
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.
58
P26
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G2
line keys on key matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G2
line keys on key matrix is touched.
59
P25
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G3
line keys on key matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G3
line keys on key matrix is touched.
60
P24
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G4
line keys on key matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G4
line keys on key matrix is touched.
61
P23
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G5
line keys on key matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G5
line keys on key matrix is touched.
62
P22
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G6
line keys on key matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P50, P51, P52 and P53 terminal while one of G6
line keys on key matrix is touched.
Pin No.
Signal
I/O
Description
20 msec.
During cooking
H : GND
L : -5V
Maximum
output
70% of maximum
output
H : GND
L : -5V
H : GND
L : -5V
ON
ON
OFF
OFF
OFF
24 sec.
8 sec.
20 msec.
H : GND
L : -5V
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