Thermal Dynamics cutmaster A60, Service Manual

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CUTMASTER A60
Manual 0-4982 7-1 PARTS REPLACEMENT
SECTION 7: REPLACEMENT
PROCEDURES
7.01 Scope
This section describes parts replacement procedures
which may be performed on the CutMaster 52 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.
7.02 Anti-Static Handling
Procedures
A. General
CAUTION
PC Boards can be irreparably damaged by
improper handling due to electrostatic dis-
charge (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.
!
WARNING
Read and understand these instructions and
the instructions on the grounding wrist strap
package before opening the equipment enclo-
sure or removing the replacement PC board
from its protective enclosure.
Disconnect primary power to the system be-
fore disassembling the torch, torch leads, or
power supply enclosure.
Where these instructions include specific
torquing instructions, failure to torque prop-
erly will cause component damage.
Do not operate the equipment or test equip-
ment under power while wearing the ground-
ing 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 ex-
posed 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 equip-
ment 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.
7.03 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.