Sharp R-209HW Service Manual page 21

Pin No. Signal I/O
25 K01 IN
26 K02 IN
27 K03 IN
28 COM0 OUT
29 COM1 OUT
30 COM2 OUT
31 COM3 OUT
32-33 OUT
SEG0-SEG1
34 SEG2 OUT
35 SEG3 OUT
36 SEG4 OUT
37-39 OUT
SEG5-SEG7
40-51 OUT
SEG8-SEG19
52-53 VC1-VC2 IN
54 VC3 OUT
Signal similar to K02.
When either G9 line on key matrix is touched, a corresponding signal will be input into
K01.
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.
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
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).
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.
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.
Terminal not used.
Segment data signal.
Connected to LCD.
The relation between signals are as follows:
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
Power source voltage input terminal.
Standard voltage for LCD.
Terminal not used.
19
Description
16.7 msec.
OFF
Maximaum
output
ON
OFF
70% of maximaum
output
ON
16.7 msec.
During cooking
LSI signal (Pin No.)
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
R-209HK
R-209HW
H : GND
L (-5V)
H : GND
L : -5V
OFF
H : GND
24 sec.
8 sec.
L : -5V
H : GND
L : -5V
LCD segment