Read Sharp R-671M Service Manual online
R-671M - 18
20 msec
During cooking
H
L
ON
OFF
During
cooking
L
GND
H.
(Grill or dual)
ON
OFF
During
cooking
L
GND
H.
(Grill or dual)
ON/OFF time ratio in Mi-
cro cooking
(a. 32second time base)
cro cooking
(a. 32second time base)
ON/OFF time ratio in Mi-
cro cooking
(a. 48second time base)
cro cooking
(a. 48second time base)
MICRO
ON
OFF
COOK
100%
100%
32sec.
0sec.
70%
24sec.
8sec.
50%
18sec.
14sec.
30%
12sec.
20sec.
10%
6sec.
26sec.
MICRO
ON
OFF
COOK
100%
100%
48sec.
0sec.
70%
36sec.
12sec.
50%
26sec.
22sec.
30%
16sec.
32sec.
10%
8sec.
40sec.
LSI(IZA921DR)
The I/O signal of the LSI(IZA921DR) are detailed in the following table.
Pin No.
Signal
I/O
Description
1-2
VL2-VL1
IN
Power source voltage input terminal.
Standard voltage for LCD.
3-5
AN7-AN5
OUT
Terminal to change functions according to the Model
DC voltage in accordance with the model in operation is applied to set up its function
6
AN4
OUT
Terminal not used.
7
AN3
IN
Terminal not used.
8
AN2
IN
Input signal which communicates the door open/close information to LSI.
Door closed; "H" level signal.
Door opened; "L" level signal.
Door opened; "L" level signal.
9-10
P01-P00
OUT
Terminal not used.
11
P57
IN
Terminal not used.
12
P56
OUT
Oven lamp and turntable motor driving signal (Square Waveform : 50Hz)
To turn on and off shut-off relay(RY1). The
square waveform voltage is delivered to
the relay(RY1) driving circuit.
square waveform voltage is delivered to
the relay(RY1) driving circuit.
13
P55
OUT
Terminal not used.
14
P54
OUT
Signal to sound buzzer.
A: key touch sound.
B: Completion sound.
B: Completion sound.
15
P53
OUT
Touch control transformer driving signal.
To turn on and off the shut off relay (RY6). If the oven has not been used for more
than two minutes, the relay (RY6) will be turned off. The relay (RY6) will be turned
on when the oven door is opened and closed.
than two minutes, the relay (RY6) will be turned off. The relay (RY6) will be turned
on when the oven door is opened and closed.
16
P52
OUT
Fan motor driving signal.
To turn on and off the fan motor relay
(RY5). "L" level during cooking, or for 5
minutes after GRILL cooking or DUAL
cooking. "H" level otherwise.
(RY5). "L" level during cooking, or for 5
minutes after GRILL cooking or DUAL
cooking. "H" level otherwise.
17
P51
OUT
Grill heating element (TOP GRILL)driving signal.
To turn on and off the grill heating element
relay (RY3). "L" level during grill (TOP
GRILL, TOP AND BOTTOM) cooking or
dual (MICRO + TOP) cooking; "H" level
otherwise.
relay (RY3). "L" level during grill (TOP
GRILL, TOP AND BOTTOM) cooking or
dual (MICRO + TOP) cooking; "H" level
otherwise.
18
P50
OUT
Bottom heating element driving signal.
To turn on and off the bottom element relay
(RY4). "L" level during grill (BOTTOM
HEATER, TOP AND BOTTOM) cooking or
dual (MICRO + BOTTOM) cooking; "H"
level otherwise.
(RY4). "L" level during grill (BOTTOM
HEATER, TOP AND BOTTOM) cooking or
dual (MICRO + BOTTOM) cooking; "H"
level otherwise.
19
P47
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook
relay (RY2). In 100% POWER
operation, the signals hold "L"
level during microwave cooking
and "H" level while not cooking.
In other cooking modes (70%,
50%, 30%, 10%) the signal
turns to "H" level and "L" level
in repetition according to the
power level.
relay (RY2). In 100% POWER
operation, the signals hold "L"
level during microwave cooking
and "H" level while not cooking.
In other cooking modes (70%,
50%, 30%, 10%) the signal
turns to "H" level and "L" level
in repetition according to the
power level.
DESCRIPTION OF LSI
ON
OFF
During cooking, or for 5 minutes
after grill cooking, or dual cooking
after grill cooking, or dual cooking
L
GND
H.
A
B
H: GND
L
H: GND
L
0.12 sec
2.4 sec
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