Read Sharp R-8000GK Service Manual online
R-8000GK
17
Pin No.
Signal
I/O
Description
13-14
AN9-AN8
IN
Turminal not used.
15
P83
OUT
Timing signal output terminal for temperature measurement (OVEN THERMISTOR).
“L” level (-5V) : Thermistor OPEN timing.
“H” level (GND) : Temperature measuring timing.
“H” level (GND) : Temperature measuring timing.
16
P82
OUT
Oven lamp and turntable motor driving signal. (Square Waveform : 50Hz)
To turn on and off the shut-off relay(RY1). The
square waveform voltage is delivered to the
relay(RY1) driving circuit.
To turn on and off the shut-off relay(RY1). The
square waveform voltage is delivered to the
relay(RY1) driving circuit.
17
CNVSS
IN
Power source voltage: -5V.
VC voltage of power source circuit input.
VC voltage of power source circuit input.
18
RESET
IN
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily set to
“L” level the moment power is applied, at this time the LSI is reset. Thereafter set at “H” level.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily set to
“L” level the moment power is applied, at this time the LSI is reset. Thereafter set at “H” level.
19
P81
OUT
Top heating element driving signal.
To operate the solid-state relay for driving the top heating element.
To operate the solid-state relay for driving the top heating element.
20
P80
OUT
Side heating element driving signal.
To operate the solid-state relay for driving the top heating element.
To operate the solid-state relay for driving the top heating element.
21
VSS
IN
Power source voltage: -5V.
VS voltage of power source circuit input.
VS voltage of power source circuit input.
22
Xin
IN
Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to Xout terminal.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to Xout terminal.
23
Xout
OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of Xin.
Output to control oscillation input of Xin.
24
VCC
IN
Power source voltage: 0V.
VC voltage of power source circuit input. Connected to GND.
VC voltage of power source circuit input. Connected to GND.
25
P77
OUT
Signal to sound buzzer.
A: Tact switch touch sound.
B: Completion sound.
C: When the oven stops so that the food can be
checked in Automatic cooking mode.
26
P76
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay(RY2). In 100%
power operation, the signals holds “L” level
during microwave cooking and “H” level while
not cooking. In other cooking modes (90%,
80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%,
0%) the signal turns to “H” level and “L” level in
repetition according to the power level.
power operation, the signals holds “L” level
during microwave cooking and “H” level while
not cooking. In other cooking modes (90%,
80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%,
0%) the signal turns to “H” level and “L” level in
repetition according to the power level.
27
P75
OUT
Cooling fan motor driving signal.
To turn on and off shut-off relay(RY5). “L” level
during fan motor driving; “H” level otherwise
during fan motor driving; “H” level otherwise
28
P74
OUT
Turminal not used.
29
P73
OUT
Jet motor driving signal.
To turn on and off shut-off relay(RY3). “L” level
during jet motor driving “H” level otherwise
To turn on and off shut-off relay(RY3). “L” level
during jet motor driving “H” level otherwise
30
P72
OUT
Control signal to turn over the rotatory direction of the jet motor.
31
P71
IN
Signal to synchronize LSI with commercial power source frequency.
This is the basic timing for all real time process-
ing of LSI.
This is the basic timing for all real time process-
ing of LSI.
32
P70
IN/OUT
Memory (EEPROM) data input/output.
33
P67
OUT
Terminal to input the program to LSI.
During cooking
L
H
20 msec.
A
B
C
H: GND
L
0.1 sec
2.0 sec
1.0 sec
1.0 sec
Microwave cooking mode
Microwave cooking with
other cooking mode
other cooking mode
VARI MODE
ON TIME OFF TIME ON TIME OFF TIME
100% power
32 sec.
0 sec.
54sec.
0ec.
90% power
30 sec.
2 sec.
49sec.
5sec.
80% power
26 sec.
6 sec.
45sec.
9sec.
70% power
24 sec.
8 sec.
40sec.
14sec.
60% power
22 sec.
10 sec.
36sec.
18sec.
50% power
18 sec.
14 sec.
29sec.
25sec.
40% power
16 sec.
16 sec.
24sec.
30sec.
30% power
12 sec.
20 sec.
18sec.
36sec.
20% power
8 sec.
24 sec.
13sec.
41sec.
10% power
6 sec.
26 sec.
9sec.
45sec.
0% power
0 sec.
32 sec.
0sec.
54sec.
ON
OFF
During
fan motor driving
L
GND
H.
ON
OFF
During
Jet motor
driving
L
GND
H.
20 msec.
H : GND
L (-5V)
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