Sharp R-930CS Service Manual page 29

Pin No. Signal I/O
18 P50 OUT
19 P47 OUT
20-21 P46-P45 OUT
22 P44 OUT
23 P43 OUT
24 P42 OUT
25 INT1 IN
26 P40 IN
27 RST IN
28/29 OUT
XCIN/XCOUT
30 XIN IN
31 XOUT OUT
32 VSS IN
33 P27 IN
34 P26 IN
35 P25 IN
36 P24 IN
Damper motor relay driving signal.
To turn on and off shut-off relay(RY4).
Heating element driving signal.
To turn on and off shut-off relay(RY3). "L" level
during convection cooking; "H" level otherwise. Dur-
ing convection cooking, the signal becomes "H" level
when the temperature of the oven cavity exceeds the
predetermined temperature.
Terminal not used.
Timing signal output terminal for temperature measurement(OVEN THERMIS-
TOR).
"H" level (GND) : Thermistor OPEN timing.
"L" level (-5V) : Temperature measuring timing.(Convection cooking)
Signal to sound buzzer.
A: key touch sound.
B: Completion sound.
C: When the temperature of the oven cav-
ity reaches the preset temperature in
the preheating mode, or when the
preheating hold time (30 minutes) is
elapsed.
Timing signal output terminal for temperature measurement(OVEN).
"H" level (GND) : Thermistor OPEN timing.
"L" level (-5V) : Temperature measuring timing.(Convection cooking)
Signal to synchronize LSI with commercial power source frequency.
This is the basic timing for all real time
processing of LSI.
Connected to GND.
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.
Terminal not used.
Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to XOUT terminal.
Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
Power source voltage: -5V.
VC voltage of power source circuit input.
Signal coming from touch key.
When any one of G-1 line keys on key matrix is touched, a corresponding signal from
P10 - P17 will be input into P27. When no key is touched, the signal is held at "L" level.
Signal similar to P27.
When any one of G-2 line key on key matrix is touched, a corresponding signal will be
input into P26.
Signal similar to P27.
When any one of G-3 line key on key matrix is touched, a corresponding signal will be
input into P25.
Signal similar to P27.
When any one of G-4 line key on key matrix is touched, a corresponding signal will be
input into P24.
27
Description
ON
(Convection)
ON
0.1 sec
A
2.0 sec
B
1.0 sec
C
16.7 msec.
R-930CS
H : GND
OFF
L
H.
GND
During
OFF
cooking
L
1.0 sec
H: GND
L
H : GND
L (-5V)