Ap1:2 Control Panel Interface Circuits - ESAB Caddyt Arc 150i Service Manual

- -15 V
The --15 V power supply is monitored by the processor. The voltage can be
tested by a service function:
Circuit board version 1, see service function no. 25 on page 40.
Circuit board version 2, see service function no. 18 on page 42.
+10 VB
Voltage regulator VR3 produces a stabilised +10 V supply, which is used to
supply the remote control unit. This supply is referred to as +10 VB, and its
neutral point, 0 VB, is separated from the electronic neutral (0 V).
Potentiometer R56 is used to adjust the voltage.
20AP1:2 Control panel interface circuits
All machine functions are set by the control panel. All processing of the control
signals is carried out by the control board.
The signals between 1AP1 and 20AP1 pass 1AP2, the displayboard
See pages 10 to 13 for component positions and circuit diagram of the display
board and the control panels.
S0740 800 161/E061205/P66
- - 26 - -
ct27d_20