Sharp R-771(W)N Service Manual page 23

:
Description
terminal while one of J-2 line tact switches on matrix is touched.
Tact switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to
P44 - P47 terminal
Terminal not used.
Oven lamp
and turntable motor drivine
sianal(Square Waveform: 50Hz).
OUT
fa $a ——$§$r
(RY1). The square waveform voltage
1 i a ee ie H
is delivered to the relay (RY1) driving
circuit .
ne
| During cooking
Connected to VC,
Auto clear terminal.
Signal is inputto reset the LSI tothe initial state when power is applied.
Temporarily
setio "L" level the moment power is applied, at this time the LSlis reset.
Thereafter
set at "H" level.
Magnetron high-voltage circuit driving signal.
IN
with respect to XIN terminal.
OUT
Internal clock oscillation frequency
contro! output.
Output to control oscillation input of XOUT.
|
Power source voltaqe: -5V.
VC voltage of power source circuit input.
otherwise.
N
OUT
Terminal not used.
Fan motor driving signal. Oo
To turn on and off the fan motor relay RY5.
cal
| aa :
"L" fevel during cooking, or for 5 minutes
|
after grill cooking or dual cooking. "H" level
| During cooking, or for 5 minutes or
otherwise.
Cae after grill or dual cooking
)
Seament data signal
Connected to LCD. No connection in LCD
R-771 - 23
OUT
OUT
N
OU
T
OUT