ESAB Caddy Tig 1500i TA34, Service Manual

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DESCRIPTION OF OPERATION
0740 800 186 - 14 - © ESAB AB 2016
DESCRIPTION OF OPERATION
This section describes the function of circuit boards and other components in the equipment.
It is divided into sections, numbered to correspond to the circuit board numbers and divisions
into function blocks.
1 MMC module
The MMC module consists of an operator's control panel and a display board.
The control panel is used for setting and displaying welding data. The welding data are
stored by the control board of the power source.
The control panels are described in separate instruction and service manuals.
TA33 intended for MMA- and DC TIG welding without pulsing.
TA34 intended for MMA- and DC TIG welding with pulsing.
TA33 TA34
Pushbuttons are used for parameter selection and a knob for parameter settings, current,
time etc.
2AP1 Power supply board
The power supply board filters the mains voltage and generates internal supply voltages for
the machine.
There are two versions of the power supply board: 0487 064-884 is used for the Tig 1500i
and 0487 631-880 is used for the Tig 2200i. The difference between the two versions is the
size of inductor L1.
Circuit board 0487 631-880 is deliverd as spare part for all machines.