Manual 0-2972
5-1
REPLACEMENT PROCEDURES
SECTION 5:
REPLACEMENT
PROCEDURES
5.01 Introduction
This section describes parts replacement procedures and
all repairs which may be performed on the CutMaster
51
Power Supply.
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. Included with each replacement
board is a ground strap 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.
Observe torquing requirements where given. Fail-
ure to torque properly will cause component dam-
age.
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 remove
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 equipment.
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.
Before disassembling any part of the Power Supply first
read the procedure for the part to be replaced, then pro-
ceed with the disassembly.
