Sharp Carousel R-1200 Instrukcja serwisowa - Strona 21
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LSI
The I/O signal of the LSI is detailed in the following table.
Pin No.
Signal
1-2
VL2-VL1
3-6
AN7-AN4
7
AN3
OUT
8
AN2
9-10
AN1-AN0
OUT
11-13
P57-P55
OUT
14
CNTR0
OUT
15
P53
OUT
16
P52
OUT
17-18
P51-P50
OUT
19
P47
OUT
20
P46
21
P45
22
P44
23
P43
24
INT0
25
P41
OUT
26
P40
27
RESET
28-29
P71-P70
OUT
DESCRIPTION OF LSI
I/O
IN
Power source voltage input terminal.
Standard voltage for LCD.
IN
Terminal to change cooking input according to the Model.
By using the A/D converter contained in the LSI, DC voltage in accordance with the Model
in operation is applied to set up its cooking constant.
Back light circuit (Light emitting diodes) driving signal.
IN
To input signal which communicates the door open/close information to LSI.
Door close "H" level signal (0V). Door open "L" level signal (-5V).
Terminal not used.
Terminal not used.
Signal to sound buzzer (2.0 kHz).
A: key touch sound.
B: Completion sound.
Terminal not used.
Oven lamp, fan motor and turntable motor driving signal
To turn on and off shut off relay (RY1). The
square waveform voltage is delivered to the RY1
driving circuit and RY2 control circuit.
Terminal not used.
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The
signals holds "L" level during microwave cook-
ing and "H" level while not cooking. In other
cooking modes (variable cooking) the signal
turns to "H" level and "L" level in repetition
according to the power level.
IN
Signal coming from touch key.
When either G12 line on key matrix is touched, a corresponding signal out of P20 - P27 will
be input into P46. When no key is touched, the signal is held at "H" level.
IN
Signal similar to P46.
When either G11 line on key matrix is touched, a corresponding signal will be input into P45.
IN
Signal similar to P46.
When either G10 line on key matrix is touched, a corresponding signal will be input into P44.
IN
Signal similar to P46.
When either G9 line on key matrix is touched, a corresponding signal will be input into P43.
IN
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
Terminal not used.
IN
Connected to GND through the pull-down resistor R100.
IN
Auto clear terminal.
Signal is inputted to reset the LSI to the initial state when power is applied.
Terminal not used.
Description
A
B
Maximum
out put
70% of maximum
out put
19
0.1 sec.
H : GND
L : -5V
2.0 sec.
H : GND
L : -5V
16.7 msec.
During cooking
OFF
H : GND
ON
L : -5V
OFF
OFF
H : GND
24 sec.
8 sec.
ON
L : -5V
16.7 msec.
R-1200
R-1201
H : GND
L : -5V
H : GND
L : -5V