ULTRAFEED VAF-4
Manual 0-5332
TROUBLESHOOTING 5-9
5.04 Advanced Troubleshooting
If the problem cannot be solved by the basic (external) troubleshooting guide, the Wirefeeder cover will have to be
removed to allow the technician to analyse failures with a few common tools.
!
WARNING
Turn off power and disconnect interconnection plug from receptacle before working on the unit. Allow
30 seconds for capacitors to discharge after disconnection.
5.05 Test Equipment and Tools for Troubleshooting and Servicing
Art # A-09849
Figure 5-1 Test Equipment and Tools
• Digital Multimeter
• Screwdriver and spanner
• CRO (20 Mhz bandwidth) & isolating transformer
5.06 Visually Inspect
Visually inspect the inside of the Wirefeeder. The levels of current present in these units can cause burning or arc-
ing 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 Wirefeeder.
Locate the faulty component(s) then replace where necessary.
