How can i know for sure PC Board is Faulty?

admin

Im looking to buy my first welder a lincoln Ranger 305G  the engine runs but there is no voltage output.  I know how to check for output with the engine alternator, but i don't know how to tell if the PC board is faulty.  If its neither the PC board nor the Alternator im guessing it should be something simple and not too expensive to fix, its just a matter of figuring it out.  I really want a Ranger 305G but i don't have the 5 grand to buy a new one.  If i can get this thing up and running for under 1,500 it could change my life once i pass my 6G.  please help me
Reply:question #1 code number please.Few things to check first. Power plugs do they have correct AC  voltage. 230 and 115 volts. can you make the engine go from low to high idle and have it go back to low by it's self. 15 sec timer. Find B1 and B2 on the chopper module and measure the DC voltage there. Should be between 80 and 100 volts dc. high idle.Need more clear information on what is working and what is not working.you can also try looking at the control pcb and see if anything is fried (burnt real bad).Discolored may not mean anything.Check your private messages
Reply:Just though of one thing, the weld terminal switch needs to be on to have voltage at the weld terminals. Try the mode switch in all positions.
Reply:Post pictures of this machine and boards
Reply:Originally Posted by ccawgcquestion #1 code number please.Few things to check first. Power plugs do they have correct AC  voltage. 230 and 115 volts. can you make the engine go from low to high idle and have it go back to low by it's self. 15 sec timer. Find B1 and B2 on the chopper module and measure the DC voltage there. Should be between 80 and 100 volts dc. high idle.Need more clear information on what is working and what is not working.you can also try looking at the control pcb and see if anything is fried (burnt real bad).Discolored may not mean anything.Check your private messages
Reply:Check with the manufacturer for error codes.It sounds like a loss wire but manufacturer can till if that case.Dave  Originally Posted by dcompeauIm looking to buy my first welder a lincoln Ranger 305G  the engine runs but there is no voltage output.  I know how to check for output with the engine alternator, but i don't know how to tell if the PC board is faulty.  If its neither the PC board nor the Alternator im guessing it should be something simple and not too expensive to fix, its just a matter of figuring it out.  I really want a Ranger 305G but i don't have the 5 grand to buy a new one.  If i can get this thing up and running for under 1,500 it could change my life once i pass my 6G.  please help me
Reply:your welder should have 120vac, this welder has 3ph weld out put which goes to a bridge rectifier change to +/- , and the + side goes to positive out put  and neg side goes to chopper "the one with 4 capacitors" and to the neg output . the chopper has  two wires which receive PWM from control board. if you have 120ac then you have 3ph going to rectifier , and if chopper get the pulse from control board  the welder will have output.