Sharp R-230HW Service Manual - Page 22

Connected to LCD Pin No. COM3

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R-203HW R-220HW R-230HW Pin No. 25 Signal K01 26 K02 27 K03 I/O Description IN Signal similar to K02. When either G9 line on key matrix is touched, a corresponding signal will be input into K01. IN Signal coming from touch key. When either G10 line on key matrix is touched, a corresponding signal out of R00, R01, R02, R03, P20 and P21 will be input into K02. When no key is touched, the signal is held at "H" level. IN Signal synchronized with commercial power source frequency. This is the basic timing for time processing of LSI. H : GND 16.7 msec. L (-5V) 28 COM0 OUT 29 COM1 OUT 30 COM2 OUT 31 32-33 34 COM3 SEG0-SEG1 SEG2 OUT OUT OUT 35 SEG3 OUT 36 SEG4 OUT 37-39 40-51 SEG5-SEG7 SEG8-SEG19 OUT OUT 52-53 54 VC1-VC2 VC3 IN OUT Common data signal: COM0. Connected to LCD (Pin No. COM1) Common data signal: COM1. Connected to LCD (Pin No. COM2) Common data signal: COM2. Connected to LCD (Pin No. COM3) Terminal not used. Terminal not used. Magnetron high-voltage circuit driving signal. To turn on and off the cook relay (RY2). OFF The signals holds "L" level during micro- Maximaum wave cooking and "H" level while not output ON cooking. In other cooking modes (variable OFF OFF cooking) the signal turns to "H" level and "L" level in repetition according to the 70% of maximaum output power level. 24 sec. ON 8 sec. H : GND L : -5V H : GND L : -5V Terminal not used. 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 and RY2 control circuit. 16.7 msec. During cooking H : GND L : -5V Terminal not used. 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 8 (40 SEG 12 SEG 9 (41 SEG 11 SEG 10 (42 SEG 10 SEG 11 (43 SEG 9 SEG 12 (44 SEG 8 SEG 13 (45 SEG 7 SEG 14 (46 SEG 6 SEG 15 (47 SEG 5 SEG 16 (48 SEG 4 SEG 17 (49 SEG 3 SEG 18 (50 SEG 2 SEG 19 (51 SEG 1 Power source voltage input terminal. Standard voltage for LCD. Terminal not used. 20

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20
R-203HW
R-220HW
R-230HW
Pin No.
Signal
I/O
Description
25
K01
IN
Signal similar to K02.
When either G9 line on key matrix is touched, a corresponding signal will be input into
K01.
26
K02
IN
Signal coming from touch key.
When either G10 line on key matrix is touched, a corresponding signal out of R00, R01,
R02, R03, P20 and P21 will be input into K02. When no key is touched, the signal is
held at “H” level.
27
K03
IN
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
28
COM0
OUT
Common data signal: COM0.
Connected to LCD (Pin No. COM1)
29
COM1
OUT
Common data signal: COM1.
Connected to LCD (Pin No. COM2)
30
COM2
OUT
Common data signal: COM2.
Connected to LCD (Pin No. COM3)
31
COM3
OUT
Terminal not used.
32-33
SEG0-SEG1
OUT
Terminal not used.
34
SEG2
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 (variable
cooking) the signal turns to “H” level and
“L” level in repetition according to the
power level.
35
SEG3
OUT
Terminal not used.
36
SEG4
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 and RY2 control
circuit.
37-39
SEG5-SEG7
OUT
Terminal not used.
40-51
SEG8-SEG19
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
8 (40)
....................
SEG 12
SEG 14 (46)
.....................
SEG
6
SEG
9 (41)
....................
SEG 11
SEG 15 (47)
.....................
SEG
5
SEG 10 (42)
....................
SEG 10
SEG 16 (48)
.....................
SEG
4
SEG 11 (43)
....................
SEG
9
SEG 17 (49)
.....................
SEG
3
SEG 12 (44)
....................
SEG
8
SEG 18 (50)
.....................
SEG
2
SEG 13 (45)
....................
SEG
7
SEG 19 (51)
.....................
SEG
1
52-53
VC1-VC2
IN
Power source voltage input terminal.
Standard voltage for LCD.
54
VC3
OUT
Terminal not used.
H : GND
L (-5V)
16.7 msec.
Maximaum
output
70% of maximaum
output
H : GND
L : -5V
H : GND
L : -5V
ON
ON
OFF
OFF
OFF
24 sec.
8 sec.
16.7 msec.
During cooking
H : GND
L : -5V