Sharp R-8380 Service Manual page 25

R-8380
Pin No.
22
23
24
25
26
27
Signal
P33
P32
P31
P30
CNVSS
RESET
I/O
OUT
OUT
IN
OUT
IN
IN
Description
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay
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.
ON
HIGH
I
MED
MED Lo~~l~~~;~~
Low p~~,GND
t-
i
Signal to sound buzzer.
A : Key touch sound.
8 : 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 WC
d=-----
2.4rec
B
1.2
C
Signal synchronized with commercial power source frequency.
This is the basic timing for all time processing of LSI.
A----LJND
I- 20msec J---- ii-5vi
Damper motor relay driving signal.
To turn on and off the shut-off relay (RYl).
Connected to VC.
Auto-clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied.
Temporarily set to "L" level the moment power is supplied, at this time the LSI is reset.
Thereafter set at "H" level.
24