Read Sharp R-795M (serv.man8) Service Manual online
R-795M
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20
26
P40
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50-P53 terminal
while one of G7 line key on matrix is touched.
27
P77
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50-P53 terminal
while one of G6 line key on matrix is touched.
while one of G6 line key on matrix is touched.
28
P76
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50-P53 terminal
Signal applied to touch-key section. A pulse signal is input to P50-P53 terminal
while one of G5 line key on matrix is touched.
29
P75
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50-P53 terminal
Signal applied to touch-key section. A pulse signal is input to P50-P53 terminal
while one of G4 line key on matrix is touched.
30
P74
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50-P53 terminal
Signal applied to touch-key section. A pulse signal is input to P50-P53 terminal
while one of G3 line key on matrix is touched.
31
P73
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50-P53 terminal
while one of G2 line key on matrix is touched.
32
P72
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P50-P53 terminal
while one of G1 line key on matrix is touched.
while one of G1 line key on matrix is touched.
33
P71
IN/OUT
Terminal not used.
34
P70
IN
Connected to VC.
35
RESET
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 to “L” level the moment power is applied, at this time the LSI is reset. Thereafter
set at “H” level.
36
XCIN
IN
Connected to VC.
37
XCOUT
OUT
Terminal not used.
38
XIN
IN
Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
with respect to XOUT terminal.
39
XOUT
OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
40
VSS
IN
Power source voltage: -5V.
VC voltage of power source circuit input.
VC voltage of power source circuit input.
41
P27
OUT
Bottom heating element driving signal.
To turn on and off the relay (RY4). “L” level during grill
cooking, oven cooking or dual cooking, “H” level
otherwise. The heater relay turns on and off within a
54 second time base in accordance with the special
program in LSI.
To turn on and off the relay (RY4). “L” level during grill
cooking, oven cooking or dual cooking, “H” level
otherwise. The heater relay turns on and off within a
54 second time base in accordance with the special
program in LSI.
42
P26
OUT
Terminal not used.
43
P25
OUT
Fan motor driving signal.
To turn on and off the fan motor relay (RY6).
“L” level during cooking, or for a while after
oven or dual cooking. “H” level otherwise.
To turn on and off the fan motor relay (RY6).
“L” level during cooking, or for a while after
oven or dual cooking. “H” level otherwise.
44
P24
OUT
Terminal not used.
45
P23
OUT
Touch control transformer driving signal.
To turn on and off the shut off relay (RY5). If the oven has not been used for more
than 2 minutes, the relay RY5 will be turned off. The relay RY5 will be turned on
when the oven door is opened and closed.
To turn on and off the shut off relay (RY5). If the oven has not been used for more
than 2 minutes, the relay RY5 will be turned off. The relay RY5 will be turned on
when the oven door is opened and closed.
46
P22
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay
(RY2). In 100% 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.
according to the power level.
Pin No.
Signal
I/O
Description
ON
OFF
During
cooking
L
GND
H.
(Grill, Oven, Dual )
ON
OFF
During cooking, or for a while
after oven or dual cooking.
L
GND
H.
DESCRIPTION OF LSI
The I/O signal of the LSI are detailed in the following table
MICRO
ON
OFF
COOK
100%
54 sec.
0 sec.
70%
40 sec.
14 sec.
50%
29 sec.
25 sec.
30%
18 sec.
36 sec.
10%
9 sec.
45 sec.
MICRO
ON
OFF
COOK
100%
32 sec.
0 sec.
70%
24 sec.
8 sec.
50%
18 sec.
14 sec.
30%
12 sec.
20 sec.
10%
6 sec.
26 sec.
ON/OFF time ratio in Micro
cooking
ON/OFF time ratio in Micro
cooking
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