Electrolux GLMB209DB Service Manual page 24

GLMB209DB
GLMB209DS
GLMB209DQ
PLMB209DC
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
8 AN2
9 AN1
10 AN0
11-13 P57-P55
14 CNTR0
15 P53
16 P52
17 P51
18 P50
19 P47
20 P46
21 P45
22-23 P44-P43
24 INT0
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.
IN Signal coming from touch key.
When either G13 line on key matrix is touched, a corresponding signal out of P20 - P27
will be input into AN3. When no key is touched, the signal is held at "H" level.
IN To input signal which communicates the door open/close information to LSI.
Door close "H" level signal (0V). Door Open "L" level (-5V).
IN AH sensor input.
This input is an analog input terminal from the AH sensor circuit, and connected to the A/
D converter built into the LSI.
IN Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is an
analog input terminal from the AH sensor circuit, and connected to the A/D converter built
into the LSI.
OUT Used for initial balancing of the bridge circuit (absolute humidity sensor).
OUT Signal to sound buzzer (2.0 kHz).
A: key touch sound.
B: Completion sound.
OUT Used for initial balancing of the bridge circuit (absolute humidity sensor).
OUT 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.
OUT Used for initial balancing of the bridge circuit (absolute humidity sensor).
OUT 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 similar to AN3.
When either G13 line on key matrix is touched, a corresponding signal will be input into
P46.
OUT Terminal not used.
IN Signal similar to AN3.
When either G12 line on key matrix is touched, a corresponding signal will be input into
P45.
OUT Terminal not used.
IN Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
Description
A
B
Maximum
output
70% of maximum
output
22
0.1 sec.
H : GND
L : -5V
2.0 sec.
H : GND
L : -5V
16.7 msec.
H : GND
L : -5V
During cooking
OFF
H : GND
ON
L : -5V
OFF OFF
H : GND
24 sec.
8 sec.
ON
L : -5V
16.7 msec.
H : GND
L : -5V