Read This First; Introduction - ESAB OrigoArc 150 Service Manual

READ THIS FIRST

Maintenance and repair work should be performed by an experienced person, and
electrical work only by a trained electrician. Use only recommended replacement parts.
This service manual is intended for use by technicians with electrical/electronic training for
help in connection with fault--tracing and repair.
Use the wiring diagram as a form of index for the description of operation. The circuit
board is divided into numbered blocks, which are described individually in more detail in
the description of operation. All component names in the wiring diagram are listed in the
component description.
This manual contains details of all design changes that have been made up to and
including August 2004.
The manual is valid for
341--xxx--xxxx, 405--xxx--xxxx.
The OrigoArc 150 is designed and tested in accordance with international and
European standards IEC/EN 60974- -1 and EN 50199.
On completion of service or repair work, it is the responsibility of the person(s)
performing the work to ensure that the product still complies with the requirements of
the above standard.

INTRODUCTION

The OrigoArc 150 is a welding current power source intended for use with coated
electrodes (MMA welding).
The power module of the power source is a single forward converter, operating at a
switching frequency of 65 kHz. IGBT transistors are used as the switching elements. All
power semiconductors are built into modules.
Schematic diagram of the power source
ch25d1
with serial no. 316--xxx--xxxx, 328--xxx--xxxx,
OrigoArc 150
- - 3 - -
Edition 040830