Valley FABRICATOR 251, Руководство по обслуживанию

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August 22, 2008 7-1
SERVICE MANUAL FABRICATOR 251
SECTION 7:
ADVANCED TROUBLESHOOTING
If the p r oblem cannot be solved by the basic (exte r nal) t r ouble shooting guide, the Powe r Sou r ce cove r s and/o r the
Wi r e Feede r cove r s will have to be r emoved. The advanced level of t r oubleshooting allows the technician with a few
common tools to r emove the cove r s and analyze failu r es.
CAUTION:
Neve r open the Powe r Sou r ce cove r s unless the Mains supply voltage to the Powe r Sou r ce is disconnected
f r om the Mains powe r point and the ON/OFF Powe r Switch Indicato r is off
WARNING
Disconnect the Fab r icato r f r om the Input powe r supply voltage befo r e disassembling.
WARNING
Do not attempt to diagnose o r r epai r unless you have had t r aining in elect r onic measu r ement and
t r oubleshooting techniques.
7.01 Preliminary Checks
Vacuum dust and di r t out of the enti r e machine.
CAUTION
Do not blow ai r into the powe r supply du r ing cleaning. Blowing ai r into the unit can cause metal pa r ticles to
inte r fe r e with sensitive elect r ical components and cause damage to the unit.
1. Check gene r al machine completeness.
2. Check tightness of mounting and STRUCTURAL HARDWARE and all te r minations and ELECTRICAL FITTINGS.
3. NO DEFORMATION p r esent to det r act f r om machine’s appea r ance o r pe r fo r mance.
4. SWITCH AND KNOBS on f r ont panel a r e secu r e and align with thei r r espective ma r kings and co rr ect fuse(s)
fitted.
5. AUXILIARY WIRING clea r of Rectifie r Heatsink, Inducto r , Shunt o r Main T r ansfo r me r .
6. SUPPLY CABLE gland is co rr ectly fastened.
7. P r ima r y o r seconda r y wi r ing does not impede AIR FLOW f r om the t r ansfo r me r windings, diode heatsink,
inducto r o r r est on sha r p edges of any sheet metal.
8. CLEARANCE of mo r e than 10mm between adjacent ba r e conducto r s and/o r any sheet metal.
9. Fo r COMPACT ve r sion set WIRE SPOOL TENSION on hub between 1.0Nm and 1.5Nm to slowly r otate empty
spool. DRIVE ROLLER TENSION to mid-position.
10. VISUAL INSPECTION - PASS