Test Equipment And Tools Needed For Troubleshooting And Servicing; Visually Inspect - Thermal Arc Fabricator 211i Service Manual

TROUBLESHOOTING
Checking Unit Before Applying Power
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Turn SW1 to OFF position, and disconnect unit from primary line voltage before working on unit.
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Significant DC voltage can remain on capacitors after unit is Off. Wait until all front panel LED's are off before
removing case.
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Check DC bus voltage according to Section 5.06 after removing case.
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Before troubleshooting or applying power to unit, complete the following checks to avoid causing further damage.

5.04 Test Equipment and Tools Needed for Troubleshooting and Servicing

• Digital Multimeter
• DC clip-on ammeter
• Screwdriver and spanner
• Oscilloscope & isolating transformer

5.05 Visually Inspect

Visually inspect the inside of the Power Source. The levels of current present in these units can cause burning or arcing
of PCB, transformers, switches, or rectifier when a failure occurs. Carefully inspect all components within these units.
Look in particular for the following:
a) Loose or broken wires or connectors.
b) Burned or scorched parts or wires or evidence of arcing.
c) Any accumulation of metal dust or filings that may have caused shorting or arcing.
If any parts are damaged, they must be replaced. Refer to the Spare Parts section for a complete list of components
used in the Power Source.
Locate the faulty component(s) then replace where necessary.
Manual 0-5158 5-5
FABRICATOR 211i
Art # A-09849
TROUBLESHOOTING