Sharp R-671(B), Руководство по обслуживанию

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R-671 - 21
12 P56 OUT Oven lamp and turntable motor driving signal(Square Waveform : 50Hz).
To turn on and off shut-off relay (RY1).
The square waveform voltage is
delivered to the relay (RY1) driving
circuit .
13 P55 OUT Terminal not used.
14 P54 OUT Signal to sound buzzer.
A: key touch sound.
B: Completion sound.
15 P53 OUT Touch control transformer driving signal.
To turn on and off the shut off relay ( RY6). If the oven has not been used for more
than 2 minutes, the relay RY6 will be turned off. The relay RY6 will be turned on
when the oven door is opened and closed.
16 P52 OUT Fan motor driving signal.
To turn on and off the fan motor relay RY5.
"L" level during cooking, or for 5 minutes
after grill cooking or dual cooking. "H" level
otherwise.
17 P51 OUT Grill heater (TOP HEATER) driving signal.
To turn on and off the grill heater relay
(RY3). "L" level during grill (TOP GRILL,
TOP AND BOTTOM) cooking or dual
(MICRO+TOP) cooking. "H" level
otherwise.
18 P50 OUT Bottom heater driving signal.
To turn on and off the bottom relay (RY4).
"L" level during grill (BOTTOM HEATER,
TOP AND BOTTOM) cooking or dual
(MICRO+BOTTOM) cooking. "H" level
otherwise.
19 P47 OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay
(RY2). In 100% POWER
operation, the signals hold "L"
level during microwave cooking
and "H" level while not cooking.
In other cooking modes (70%,
50%, 30%, 10%) the signal turns
to "H" level and "L" level in
repetition according to the power
level.
20-22 P46-P44 OUT Terminal not used.
23 INT1 IN Signal coming from encoder.
When the encoder is turned, the contacts of encoder make pluse signals. And
pulse signals are input into INT1.
24 INT0 IN Signal to synchronized LSI with commercial power source frequency
(50Hz).
This is basic timing for time processing of LSI.
25 P41 IN Signal coming from encoder.
Signal similar to INT1. Pulse signals are input into P41.
26 P40 IN Connected to VC.
Pin No. Signal I/O Description
20 msec
During cooking
H
L
A
B
H: GND
L
H: GND
L
0.12 sec
2.4 sec
ON
OFF
During cooking, or for 5 minutes
after grill cooking, or dual cooking
L
GND H.
ON
OFF
During
cooking
L
GND
H.
(Grill or dual)
ON
OFF
During
cooking
L
GND
H.
(Grill or dual)
ON/OFF time ratio in Mi-
cro cooking
(a. 32second time base)
ON/OFF time ratio in Mi-
cro cooking
(a. 48second time base)
MICRO ON OFF
COOK
100%
32sec. 0sec.
70% 24sec. 8sec.
50% 18sec. 14sec.
30% 12sec. 20sec.
10% 6sec. 26sec.
MICRO ON OFF
COOK
100%
48sec. 0sec.
70% 36sec. 12sec.
50% 26sec. 22sec.
30% 16sec. 32sec.
10% 8sec. 40sec.
20 msec
H : GND
L (-5V)
DESCRIPTION OF LSI
CONT
...