Sharp R-820BK Service Manual page 28

R-820BK
R-820BW
Pin No. Signal
26 P40
27 P77
28 P76
29 P75
30 P74
31 P73
32 P72
33 P71
34 P70
35 RESET
36 P81
37 P80
38 XIN
I/O
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal while
one of G7 line key on matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal while
one of G6 line key on matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal while
one of G5 line key on matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal while
one of G4 line key on matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal while
one of G3 line key on matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal while
one of G2 line key on matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal while
one of G1 line key on matrix is touched.
OUT Oven lamp and turntable motor driving signal(Square Waveform : 60Hz).
To turn on and off shut-off relay (RY6). The
square waveform voltage is delivered to
the relay (RY6) driving circuit.
IN Connected to VC.
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.
OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay
(RY2). In P-HI operation, the sig-
nals hold "L" level during microwave
cooking and "H" level while not cook-
ing. In other cooking modes (P-90,
P-80, P-70, P-60, P-50, P-40, P-30,
P-20, P-10, P-0) the signal turns to
"H" level and "L" level in repetition
according to the power level.
OUT Grill heaters (TOP HEATER) driving signal.
To turn on and off the grill heaters relay
(RY3). "L" level during grill (TOP GRILL,
TOP AND BOTTOM) cooking, Con-
vection cooking or Roast cooking, "H"
level otherwise.
The heater relay turns on and off within
a 48 second time base in accordance
with the special program in LSI.
IN Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to XIN terminal.
Description
VARI
P-HI(100% power)
P-90(approx. 90% power)
P-80(approx. 80% power)
P-70(approx. 70% power)
P-60(approx. 60% power)
P-50(approx. 50% power)
P-40(approx. 40% power)
P-30(approx. 30% power)
P-20(approx. 20% power)
P-10(approx. 10% power)
P-0(0% power)
Power output
100 %
90 %
80 %
70 %
60 %
50 %
40 %
30 %
20 %
10 %
26
16.7 msec.
H
L
During cooking
ON TIME OFF TIME
32 sec. 0 sec.
30 sec. 2 sec.
26 sec. 6 sec.
24 sec. 8 sec.
22 sec. 10 sec.
18 sec. 14 sec.
16 sec. 16 sec.
12 sec. 20 sec.
8 sec. 24 sec.
6 sec. 26 sec.
0 sec. 32 sec.
ON time OFF time
48 sec. 0 sec.
44 sec. 4 sec.
40 sec. 8 sec.
36 sec. 12 sec.
32 sec. 16 sec.
26 sec. 22 sec.
22 sec. 26 sec.
16 sec. 32 sec.
12 sec. 36 sec.
8 sec. 40 sec.