Sharp R-933 Service Manual page 25

Microwave oven with grill and convection
Table of Contents

Advertisement

Pin No.
Signal
23
INT0
24
CNVSS
25
RESET
26
P41
IN/OUT
27
P40
OUT
28
XIN
29
XOUT
OUT
30
VSS
31
P27
OUT
32
P26
OUT
33
P25
OUT
34
P24
OUT
35
P23
OUT
36
P22
OUT
DESCRIPTION OF LSI
I/O
IN
Signal to synchronized LSI with commercial power source frequency(50Hz).
This is basic timing for time processing
of LSI.
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.
Memory (EEPROM) data input/output.
Memory (EEPROM) clock out.
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.
Internal clock oscillation frequency control output.
Output to control oscillation input of XOUT.
IN
Power source voltage: -5V.
VC voltage of power source circuit input.
Grill (TOP) heating element driving signal.
To turn on and off the grill heating element
relay (RY3). "L" level during grill cooking,
convection cooking or dual 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.
Convection heating element driving signal.
To turn on and off the relay (RY4). "L" level
during grill cooking, convection cooking or
dual 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.
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.
Convection motor driving signal.
To turn on and off shut-off relay(RY7). "L"
level during convection or dual cooking "H"
level otherwise. (Relay RY7 does not turn
on at preheating mode.)
Fan motor driving signal.
To turn on and off the fan motor relay RY6.
"L" level during cooking, or for 5 minutes
after grill cooking or for a while after
convection or dual cooking. "H" level
otherwise.
Terminal not used.
Description
23
20 msec.
Power output
ON time
100 %
48 sec.
90 %
44 sec.
80 %
40 sec.
70 %
36 sec.
60 %
32 sec.
50 %
26 sec.
40 %
22 sec.
30 %
16 sec.
20 %
12 sec.
10 %
8 sec.
Power output
ON time
100 %
48 sec.
90 %
44 sec.
80 %
40 sec.
70 %
36 sec.
60 %
32 sec.
50 %
26 sec.
40 %
22 sec.
30 %
16 sec.
20 %
12 sec.
10 %
8 sec.
20 msec.
During cooking
During
OFF
cooking
(Convection or dual cooking)
ON
H.
GND
OFF
ON
L
During cooking or for awhile after
grill convection or dual.
H : GND
L (-5V)
OFF time
0 sec.
4 sec.
8 sec.
12 sec.
16 sec.
22 sec.
26 sec.
32 sec.
36 sec.
40 sec.
OFF time
0 sec.
4 sec.
8 sec.
12 sec.
16 sec.
22 sec.
26 sec.
32 sec.
36 sec.
40 sec.
H
L
H.
GND
L

Advertisement

Table of Contents
loading

This manual is also suitable for:

R-933inR-933w

Table of Contents