Thermal Arc 185 AC, Руководство по обслуживанию

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10-1
ARCMASTER 185 ACDC 200 ACDC
May 22, 2006
SECTION 10:
ADVANCED TROUBLESHOOTING
If you are here, all of the troubleshooting suggestions in
Section 8-Basic Troubleshooting have either failed to
resolve the faulty operation or have indicated that one or
more of the subsystems within the power supply are
defective. This section provides the information needed
to take live measurements on the various subsystems
within the power supply, and replace those subsystems
that prove faulty.
CAUTION
Troubleshooting and repairing this unit is a
process, which should be undertaken only by
those familiar with high voltage/high power
electronic equipment.
!
WARNING
There are extremely dangerous voltage and
power levels present inside this unit. Do not
attempt to diagnose or repair unless you have
training in power electronics, measurement
and troubleshooting techniques.
Under no circumstances are field repairs to be attempted
on printed circuit boards or other subassemblies of this
unit. Evidence of unauthorized repairs will void the factory
warranty. If a subassembly is found to be defective by
executing any of the procedures in this Service Manual,
the subassembly should be replaced with a new one. The
faulty subassembly should then be returned to Thermal
Arc through established procedures.
!
WARNING
Disconnect primary power at the source before
disassembling the power supply. Frequently
review the “Principal Safety Standards” in
section 1.02. Be sure the operator is equipped
with proper gloves, clothing and eye and ear
protection. Make sure no part of the operator’s
body comes into contact with the work piece
or any internal components while the unit is
activated.
10.01 System-Level Fault Isolation
If none of the suggestions provided in Section 8 have
solved the problem or corrected the faulty operation, the
next step is to isolate one or more of the internal
subassemblies that may be defective.
CAUTION
Perform all steps in each procedure, in
sequence. Skipping portions of procedures,
or performing steps out of sequence can result
in damage to the unit, and possible injury, or
worse, to the operator.