R-7N76(W)M
R-7N76(B)M
22
ON
OFF
H : GND
L
During cooking
H
L
20 msec
ON
OFF
During
cooking
L
GND
H.
(Convection or dual)
DESCRIPTION OF LSI
LSI(IZA627DR)
The I/O signal of the LSI(IZA627DR) are detailed in the following table.
Pin No.
Signal
I/O
Description
1
VCC
IN
Connected to GND.
2
VEE
IN
Anode (segment) of Fluorescent Display illumination voltage: -26V.
Vp voltage of power source circuit input.
3
AVSS
IN
Reference voltage input terminal.
A reference voltage applied to the A/D converter in the LSI. The reference voltage is
generally maintaned at -5V.
4
VREF
IN
Reference voltage input terminal.
A reference voltage applied to the A/D converter in the LSI. Connected to GND.(0V)
5
AN7
IN
Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is
an analog input terminal from the AH sensor circuit, and connected to the A/D coverter
built into the LSI.
6
AN6
IN
AH sensor input.
This input is an analog input terminal from the AH sensor circuit, and connected to the
A/D converter built into the LSI.
7-9
AN5-AN3
IN
Heating constant compensation terminal.
10
AN2
IN
Temperature measurement input: OVEN THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the thermistor,
this input is converted into temperature by the A/D converter built into the LSI.
11
AN1
IN
Input signal which communicates the damper open/close information to LSI.
Damper opened; “H” level signal(0V: GND).
Damper closed; “L” level signal(-5V: VC).
12
AN0
IN
Input signal which communicates the door open/close information to LSI.
Door closed; “H” level signal(0V).
Door opened; “L” level signal(-5V).
13
P55
OUT
Damper motor relay driving signal.
To turn on and off shut-off relay (RY7).
14
P54
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 and relays
(RY2-RY5) control circuit.
15
P53
OUT
Fan motor driving signal.
To turn on and off the shut-off relay (RY6). The signal holds “L” level during cooking and
holds “H” level while not cooking.
16
P52
OUT
Heating element driving signal.
To turn on and off heater relay (RY3). “L” level during
convection cooking or dual cooking; “H” level otherwise.
During convection cooking or dual cooking; the signal
becomes "H" level when the temperature of the oven cavity
exceeds the predetermined temperature.
17
P51
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). In
High operation, the signals holds “L” level
during microwave cooking and “H” level
while not cooking. In other cooking modes
(M. HIGH, MED, M.LOW, LOW) the signal
turns to “H” level and “L” level in repetition
according to the power level.
Note
DEF: Microwave cooking mode
VARI-MODE
ON-TIME
OFF-TIME
HIGH
DEF
32sec.
0sec.
(100% power)
DUAL
48sec.
0sec.
M.HIGH
DEF
24sec.
8sec.
(approx. 70% power) DUAL
36sec.
12sec.
MED
DEF
18sec.
14sec.
(approx. 50% power) DUAL
26sec.
22sec.
M.LOW
DEF
12sec.
20sec.
(approx. 30% power) DUAL
16sec.
32sec.
LOW
DEF
6sec.
26sec.
(approx. 10% power) DUAL
8sec.
40sec.
