Description Of Operation - ESAB Caddyt Arc 150i Service Manual

DESCRIPTION OF OPERATION

This description of operation describes the function of circuit boards and other components
in the power source. It is divided into sections, numbered to correspond to the circuit board
numbers and divisions into function blocks.
1AP1 Control panel
The control board processes the control signals to/from the control panel. See the
description on page 26.
When the machine is switched on, the LEDs of the control panel and the display segments
are tested by the software. The display then shows the machine type and software version.
Some of the LEDs of the control panel may gleam very weak when they are off, this is no
fault. An activated LED lights with a clear light.
The control panel LEDs and the display segments can be tested by service functions, see
pages 38 to 43.
CaddyArc 150
A2
A1
A
A3
E
Green LEDs, except D2 (yellow)
A1 D1
A2 D2
A3 D3
A4 D4
Control panel, CaddyArc 150
ct27d1
L
X1
K
D3
A4
F
5
6
7
8
A E F
K L
1
4
- - 10 - -
D1
D2
D4
Buttons
12
16
17
21
22
23
X1
24
GREEN LED
S0740 800 161/E061205/P66