Pcb1_Current Reference (0558038317) - ESAB Powercut 1600 Service Manual

SECTION 4 DESCRIPTION Of OPERATION

4.8.9 PCB1_Current Reference (0558038317)

The output current level of the PC1600 is set from the board mounted potentiometer (R69) that extends
through the front panel of the console.
The wiper of this pot is connected to the microcontroller through resistor R468. The pot is connected across
5 volts and ground. The resulting voltage divider from the wiper varies the voltage sent to the microcon-
troller. This varies the output of the PWM circuit, and so, varying the current output of the PC1600.
R69 is a 10 K Ohm potentiometer.
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