R-9HlO
Pin No.
Signal
I/O
Description
22
P33
23
P32
OUT
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 (MED HIGH, MED, MED LOW, LOW) the
signal turns to “H” level and “L” level in repetition according to the power level.
HIGH
MED H,G;’ 24s.~
,
d
MED
I-
MED ,,,i:,2:;$iq
LOW BFIL GND
I-
-l
Signal to sound buzzer.
A : Key touch sound.
B : Completion sound.
C : When the temperature of the oven cavity reaches the preset temperature in the pre-
heating mode, or when the preheating hold time (15 minutes) is elapsed.
0.12 BBC.
-!-
A
2.4 sec.
B
1.2
H CND
C
L
24 P31
IN
Signal to synchronize LSI with commercial power source frequency.
This is the basic timing for all real time processing of LSI.
25
P30
OUT Damper motor relay driving signal.
To turn on and off the shut-off relay (RY4).
H GNO
OFF
ON
.------L
26 CNVSS
IN
Connected to VC.
27
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.
25