Electrolux E30MO65GSSB, Technical & Service Manual

Page: 41 / 64

Troubleshooting and Testing
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VCC
VEE
AVSS
VREF
AN7
AN6
AN5-AN3
AN2
AN1
AN0
P55
P54
P53
P52
IN
IN
IN
IN
IN
IN
IN
IN
OUT
IN
OUT
OUT
OUT
OUT
Connected to GND.
Anode (segment) of Fluorescent Display light-up voltage: -30V.
Vp voltage of power source circuit input.
Power source voltage: -5V.
VC voltage of power source circuit input.
Reference voltage input terminal.
A reference voltage applied to the A/D converter in the LSI. Connected to GND.(0V)
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.
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.
Heating constant compensation terminal.
Input signal which communicates the door open/close information to LSI.
Door closed; “H” level signal(0V).
Door opened; “L” level signal(-5V).
Input signal which communicates the damper open/close information to LSI.
Damper opened; “H” level signal(0V:GND).
Damper closed; “L” level signal(-5V).
Temperature measurement input: OVEN THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the thermistor,
this input is converted into temperature by the A/D converter built into the LSI.
Digit selection signal.
The relationship between digit signal and digit are as follows;
Digit signal Digit
P03 ............................. 1st.
P02 ............................ 2nd.
P01 ............................. 3rd.
P00 ............................. 4th.
P37 ............................. 5th.
P36 ............................ 6th.
P35 ............................ 7th.
P55 ............................ 8th.
Normally, one pulse is output in every ß
period, and input to the grid of the Fluorescent
Display.
Oven lamp and turntable motor driving signal. (Square Waveform : 60Hz)
To turn on and off the shut-off relay(RY1). The square waveform
voltage is delivered to the relay(RY1) driving circuit.
RY1 driving circuit and RY2 control circuit.
Convection motor driving signal.
To turn on and off shut-off relay(RY5). “L” level
during CONVECTION; “H” level otherwise.
Cooling fan motor driving signal.
To turn on and off shut-off relay(RY6). “L” level during both
microwave and convection cooking; “H” level otherwise.
Pin# Signal I/O Description
Description of LSI
The I/O signals of the LSI(IXA103DR) are detailed in the following table.