ESAB fabricator 141i Service Manual page 6

SECTION 6:
TROUBLESHOOTING ............................................................................................ 6-1
6.01 Pre-Power Up Checks.................................................................................................. 6-1
6.02 Tools Needed for Troubleshooting and Servicing ........................................................ 6-1
6.03 Troubleshooting .......................................................................................................... 6-1
6.04 Case Removal .............................................................................................................. 6-4
6.05 Clear protective Sheet Removal ................................................................................... 6-5
6.06 Visually Inspect ........................................................................................................... 6-5
6.07 Preliminary DC Bus Measurement of the Main PCB1 .................................................. 6-6
6.08 Check Main ON / OFF Switch ....................................................................................... 6-7
6.09 Check Main Input Rectifier .......................................................................................... 6-8
6.10 DC Bus Voltage Measurement ..................................................................................... 6-8
6.11 PCB Connectors .......................................................................................................... 6-9
6.12 DIP Switch Settings, Control PCB2 ........................................................................... 6-18
6.13 Calibration ................................................................................................................. 6-19
6.14 Main Circuit Description ............................................................................................ 6-22
6.15 Circuit Diagram ......................................................................................................... 6-24
SECTION 7:
DISASSEMBLY PROCEDURE ................................................................................... 7-1
7.01 Safety Precautions for Disassembly ............................................................................ 7-1
7.02 Control PCB2 Removal ................................................................................................ 7-1
7.03 Display PCB3 Removal ................................................................................................ 7-3
7.04 Front Panel Assembly Removal ................................................................................... 7-5
7.05 Rear Panel Removal .................................................................................................... 7-6
7.06 ON/ OFF Switch SW1 and Power Cord Removal .......................................................... 7-7
7.07 Base Panel Removal and Main PCB1 Disassembly ...................................................... 7-8
SECTION 8:
ASSEMBLY PROCEDURES ..................................................................................... 8-1
8.01 Installing Base panel.................................................................................................... 8-1
8.02 Installing Rear panel .................................................................................................... 8-2
8.03 Installing Front Panel ................................................................................................... 8-3
8.04 Installing Control PCB2 and Clear Protective Sheet ..................................................... 8-4
8.05 Installing Case ............................................................................................................. 8-6
SECTION 9: KEY SPARE PARTS ...................................................................................... 9-1
9.01 Tweco Fusion 140A MIG Gun Parts ............................................................................. 9-1
9.02 Power Source .............................................................................................................. 9-2
9.03 Hardware List .............................................................................................................. 9-4
SECTION 10:
OPTIONS AND ACCESSORIES ................................................................................10-1
10.01 Options and Accessories ........................................................................................... 10-1
REVISION HISTORY ...................................................................................................10-2
INTERNATIONAL CONTACT INFORMATION ............................................................. REAR COVER
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