Manual 0-2957 5-1 REPLACEMENT PROCEDURES
SECTION 5:
REPLACEMENT
PROCEDURES
5.01 Scope
This section describes parts replacement procedures
which may be performed on the CutMaster 81 Power Sup-
ply.
Under no circumstances are field repairs to be attempted
on Printed Circuits or other subassemblies of this unit.
Evidence of unauthorized repairs may void the factory
warranty.
5.02 Anti-Static Handling
Procedures
A. General
Caution: PC Boards can be irreparably damaged by im-
proper handling due to electrostatic discharge (ESD).
Replacement PC Boards are shipped in a protective en-
closure to prevent damage from electrostatic discharge
(ESD) during shipping. A ground strap is included with
each replacement board to prevent static damage during
installation.
WARNINGS
Read and understand these instructions and the
instructions on the grounding wrist strap package
before opening the equipment enclosure or remov-
ing the replacement PC board from its protective
enclosure.
Disconnect primary power to the system before dis-
assembling the torch, torch leads, or power supply
enclosure.
Where these instructions include specific torquing
instructions, failure to torque properly will cause
component damage.
Do not operate the equipment or test equipment
under power while wearing the grounding wrist
strap.
B. Procedure
1. Open the wrist strap and unwrap the first two
folds of the band. Wrap the adhesive side firmly
around your wrist.
2. Unroll the rest of the band and peel the liner from
the copper foil at the opposite end.
3. Attach the copper foil to a convenient and exposed
electrical ground.
4. Connect the equipment primary cable ground to
the same electrical ground as the wrist strap.
5. Open the equipment enclosure and remove the
failed PC board.
6. Carefully open the ESD protective bag and re-
move the replacement PC Board.
7. Install the replacement PC Board in the equipment
and make all necessary connections.
8. Place the failed PC Board in the ESD protective
bag and seal for return shipping.
9. Replace the power supply cover.
10. Remove the grounding wrist strap from your
wrist and from the electrical ground connection
before reconnecting primary power to the equip-
ment.
5.03 Parts Replacement - General
Information
The parts replacement procedures described in this
manual, except for filter replacement, require that the
Power Supply be disassembled. The part to be replaced
will determine to what extent the Power Supply must be
disassembled.
Before removing any connection mark each wire with the
connection designation. When reassembling make sure
the wires go to the proper terminals.
Note the routing of wires and make sure the wires are
put back in the same place when re-assembling the unit.
Each subsection is referenced to Section 6 for parts lists
and overall detailed drawings.
WARNING
Disconnect primary power from the source before
opening or disassembling the power supply.
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