Table Of Contents; Ranger® 305G Efi; Service Manual - Lincoln Electric RANGER 305G EFI Service Manual

LINCOLN ELECTRIC Ranger® 305G EFI Service Manual

Ranger® 305G EFI

Service Manual

Last update: 2017/11/01
RANGER® 305G EFI ........................................................................................................................................ 1
Service Manual ..................................................................................................................................................... 1
Troubleshooting & Repair ................................................................................................................................. 3
HOW TO USE TROUBLESHOOTING GUIDE ..................................................................................................... 3
PC BOARD TROUBLESHOOTING PROCEDURES .............................................................................................. 4
Troubleshooting guide ....................................................................................................................................... 5
Test Procedures ................................................................................................................................................. 23
CASE COVER REMOVAL AND REPLACEMENT PROCEDURE.......................................................................... 23
CHOPPER MODULE CAPACITOR DISCHARGE PROCEDURE .......................................................................... 25
BRUSH AND SLIP RING SERVICE PROCEDURE .............................................................................................. 27
ROTOR RESISTANCE AND GROUND TEST PROCEDURE (STATIC) ................................................................. 29
ROTOR RESISTANCE AND GROUND TEST PROCEDURE (DYNAMIC) (ALSO REFERED TO AS FLYING
RESISTANCE TEST) ....................................................................................................................................... 31
ROTOR VOLTAGE TEST PROCEDURE ........................................................................................................... 32
FLASHING VOLTAGE TEST PROCEDURE (ENGINE NOT RUNNING) ............................................................... 35
STATOR VOLTAGE TEST PROCEDURE .......................................................................................................... 38
STATOR SHORT CIRCUIT & GROUND TEST PROCEDURE .............................................................................. 41
OUTPUT RECTIFIER BRIDGE TEST PROCEDURE ............................................................................................ 44
CHOPPER MODULE FUNCTION TEST PROCEDURE ....................................................................................... 46
CHOPPER MODULE RESISTANCE TEST PROCEDURE .................................................................................... 48
WELD CONTROL BOARD PWM GATE SIGNAL TEST PROCEDURE ................................................................. 50
WELD CONTROL FEEDBACK TEST PROCEDURE ............................................................................................ 53
CONTROL POTENTIOMETER AND MODE SWITCH RESISTANCE TEST PROCEDURE ...................................... 56
REMOTE RECEPTACLE RESISTANCE TEST PROCEDURE ................................................................................ 59
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