Thermal Arc 181i FABRICATOR Service Manual page 5

SECTION 6: TROUBLESHOOTING ........................................................................ 6-1
6.01 Basic Troubleshooting-Power Source Faults ................................................... 6-1
6.02 Checking Unit Before Applying Power ............................................................ 6-2
6.03 Tools Needed for Troubleshooting and Servicing ............................................ 6-2
6.04 Case Removal ................................................................................................. 6-3
6.05 Clear Cover Sheet Removal ............................................................................. 6-4
6.06 Visually Inspect ............................................................................................... 6-4
6.07 Preliminary DC Bus measurement of the main inverter board ........................ 6-4
6.08 Preliminary check of the main inverter board ................................................. 6-5
6.09 Check main On / Off Switch ............................................................................ 6-7
6.10 Check main input rectifier ............................................................................... 6-7
6.11 DC Bus voltage measurement ......................................................................... 6-8
6.12 PCB Connectors .............................................................................................. 6-9
6.13 DIP switch settings, Control PCB .................................................................. 6-14
6.14 Calibration .................................................................................................... 6-15
6.15 Main Circuit Description ............................................................................... 6-18
6.16 Circuit Diagram ............................................................................................. 6-20
SECTION 7: DISASSEMBLY PROCEDURE ............................................................... 7-1
7.01 Safety Precautions for Disassembly ............................................................... 7-1
7.02 Control Board Removal ................................................................................... 7-2
7.03 Front Panel Assembly Removal ...................................................................... 7-4
7.04 Front Panel (Operator Interface) Circuit Board PCB3 Removal ....................... 7-6
7.05 Back Panel Removal ....................................................................................... 7-7
7.06 Power Switch S1 and Power Cord Removal ................................................... 7-8
7.07 Base Panel Removal ....................................................................................... 7-9
SECTION 8: ASSEMBLY PROCEDURES .................................................................. 8-1
8.01 Installing Base Board ...................................................................................... 8-1
8.02 Installing Back Panel ....................................................................................... 8-2
8.03 Installing Front Panel ...................................................................................... 8-4
8.04 Installing Main Control Panel and Clear Cover Sheet ...................................... 8-6
8.05 Installing Case ................................................................................................ 8-8
SECTION 9: REPLACEMENT PARTS ..................................................................... 9-1
9.01 Tweco WeldSkill 180A MIG Torch ........................................................................ 9-1
9.02 Power Source ...................................................................................................... 9-2
SECTION 10: OPTIONS AND ACCESSORIES ...........................................................10-1
10.01 Options and Accessories .............................................................................. 10-1
THERMAL ARC - LIMITED WARRANTY TERMS
TERMS OF WARRANTY - JANUARY 2011
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