Lincoln Electric LN-25X Service Manual

LINCOLN ELECTRIC LN-25x™ Service Manual
1
LN-25x™
Service Manual SVM269
Last update: 2016/05/01
LN-25X™ .................................................................................................................................................. 1
Service Manual............................................................................................................................................................. 1
Theory of Operation .................................................................................................................................................. 3
INPUT SECTION ....................................................................................................................................... 3
USER INTERFACE BOARD AND CROSSLINC™ TECHNOLOGY ....................................................................... 4
FLEXIBLE POWER SUPPLY BOARD, SWITCHES AND WIREFEED .................................................................. 5
OPTIONAL TIMER KIT ............................................................................................................................... 6
Troubleshooting & Repair ....................................................................................................................................... 7
HOW TO USE TROUBLESHOOTING GUIDE ................................................................................................ 7
PC BOARD TROUBLESHOOTING PROCEDURES .......................................................................................... 8
Troubleshooting guide ............................................................................................................................................. 9
Test Procedures ....................................................................................................................................................... 12
WIRE DRIVE ASSEMBLY AND CONTROL BOX COVER REMOVAL AND REPLACEMENT PROCEDURE ........... 12
D1 RECTIFIER TEST PROCEDURE ............................................................................................................. 15
WIRE DRIVE MOTOR TEST PROCEDURE .................................................................................................. 17
USER INTERFACE BOARD TEST PROCEDURE............................................................................................ 20
GAS SOLENOID TEST PROCEDURE .......................................................................................................... 23
CONTACTOR TEST PROCEDURE .............................................................................................................. 25
FLEXIBLE POWER SUPPLY BOARD TEST PROCEDURE ............................................................................... 27
Removal And Replacement Procedures .......................................................................................................... 31

Lincoln Electric LN-25X Specifications

General

Output Current Range	30 - 300 A
Wire Feed Speed Range	50 - 700 IPM
Input Phase	Single Phase
Input Current	20 A
Duty Cycle	60%
Wire Size Range	0.023-0.045 in (0.6-1.2 mm)