Tuttnauer 3850 ELVG-D, Technician Manual

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10.2 AJUNC 3 Board
The AJUNC3 analog board is connected to the digital board, by a flat
cable, on connector JP1. This board contains all the analog and digital
inputs required for the system. The board converts the analog input
signal so the digital board can process it. In addition to this the board
enables the microprocessor (on the digital board) to control all the
digital outputs on the analog board.
The Board’s Connections and Functions:
JP1 Connection between the analog board and the digital board.
JP2 Digital outputs for WATER, EXH, and AIR valves.
Digital inputs for: thermostat, door switch, float switch and
analog input of the electrode.
JP3 Power connection to the board: 5V & 12V.
JP4 Control of the SSR controlling the heating elements.
JP6 MPX2200AP pressure transducer input.
JP10 Voltage output to the fan.
JP11 PT100 temperature sensor input.
JP12 Voltage output to DRY valve (EA, EKA only).
JP13 Communication
port
JP14 Connection to TEST BOARD.
JP15 Connection to drying-pump control (EA. EKA).
Potentiometers
By setting the potentiometers, the input signal is adjusted to the signal
required to be processed by the digital board.
POT1 Setting “Gain Pressure”.
POT4 Setting “Zero Temp”.
POT5 Seting “Gain Temp”.