Sharp R-209BW Supplemental Service Manual page 11

Pin No. Signal I/O
23 P23 IN
24 K00 IN
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 G7 line on key matrix is touched, a corresponding signal will be input into P23.
Signal similar to K02.
When either G8 line on key matrix is touched, a corresponding signal will be input into K00.
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: COM1.
Connected to LCD (Pin No. C1)
Common data signal: COM2.
Connected to LCD (Pin No. C2)
Common data signal: COM1.
Connected to LCD (Pin No. C3)
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 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.
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.)
SEG 8 (40) .......................... S12
SEG 9 (41) .......................... S11
SEG 10 (42) .......................... S10
SEG 11 (43) ............................ S9
SEG 12 (44) ............................ S8
SEG 13 (45) ............................ S7
Power source voltage input terminal.
Standard voltage for LCD.
Terminal not used.
9
Description
100P
70P
LCD (Pin No.) LSI signal (Pin No.)
SEG 14 (46) ............................. S6
SEG 15 (47) ............................. S5
SEG 16 (48) ............................. S4
SEG 17 (49) ............................. S3
SEG 18 (50) ............................. S2
SEG 19 (51) ............................. S1
R-209BW
16.7 msec.
OFF
H : GND
ON
L : -5V
OFF
OFF
H : GND
24 sec. 8 sec.
ON
L : -5V
16.7 msec.
H : GND
L : -5V
During cooking
LCD (Pin No.)
GND
-5V