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  #11  
Old 08-26-2008, 07:28 PM
VW cat VW cat is offline
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GWIZ,
The shop is a welding repair business. We cleaned out some of the original wrecked machines that were probably there when he bought the business. Hope to go back and get the rest. I don't think it was intended to fix any of this up, and he did ask me that, so I'm reluctant to ask if he has a service manual, yet. He's a pretty good chap.

I checked the other 2 IGBT's and they have the same #.

RancherBill,
Thanks for all the research on the IGBT's, and to recognize who made them too. Good to know there are tech support people to talk to before ordering. Phil
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  #12  
Old 08-27-2008, 07:33 PM
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Originally Posted by VW cat View Post
GWIZ,
The shop is a welding repair business. We cleaned out some of the original wrecked machines that were probably there when he bought the business. Hope to go back and get the rest. I don't think it was intended to fix any of this up, and he did ask me that, so I'm reluctant to ask if he has a service manual, yet. He's a pretty good chap.
Ok
I thought I'd ask.
At this time we don't need the book.

A welding shop that did not fix the welder, Is not a good sign.


We need to test the other two IGBT and the 4 small boards before considering, getting any parts.
I'm undecided how elaborate we should go into testing them.
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  #13  
Old 08-28-2008, 06:24 AM
VW cat VW cat is offline
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GWIZ,
I did take one of the broken IGBT's apart and pulling back some of the goo inside, I can see 2 burnt areas. But then, that could just be the tip of the iceburg so to speak.... Phil
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  #14  
Old 08-28-2008, 01:52 PM
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I'd throw sixty bucks at it and see what happens.
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Nothin's hard-Just some things take longer than others.

Tool's,...................
Too much to list.
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  #15  
Old 08-30-2008, 01:04 AM
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Originally Posted by VW cat View Post
GWIZ,
I did take one of the broken IGBT's apart and pulling back some of the goo inside, I can see 2 burnt areas. But then, that could just be the tip of the iceburg so to speak.... Phil
There's actually two IGBT transistors in each block (that's 4 bad transistors in your two Blocks).
I don't have all the spec.'s on your IGBT's
The ones I have, the metal plate on the bottom is isolated and the goo is more then likely used to transfer heat from the transistors to the plate.

We will check the others before we do any replacing.
sometimes one bad transistor can take out the others.

===
Looking at your picture there's a transformer that appears to have vary black windings.
What am I seeing ? are they burnt or what ?
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  #16  
Old 08-31-2008, 05:13 PM
VW cat VW cat is offline
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GWIZ,
We looked at those windings today and the black colour is the colour of the insulation, so externally it appears fine, and my son looked it over too as he has better eyes. I've been helping my son put a VW diesel in his Suzuki, so I've been sidetracked lately, but we had it running today. Do you think you can come up with a test? Phil
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  #17  
Old 09-01-2008, 03:29 AM
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Same thing, I keep getting sidetracked.
I'll come up with a basic test, nothing difficult.
I just got to dig up some inexpensive items that you can also find locally..
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  #18  
Old 09-02-2008, 03:33 PM
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Here's what you need.
=
Two AA battery's.
one 9 volt battery.

A battery clip for the 9 v battery.
A Battery holder that holds the two AA battery's. (I found one that holds 3 batteries I'll make it work for two).

1000 ohm resistor (1K), (1/4 watt or whatever).
100,000 ohm resistor (100K), (1/4 watt or whatever).
The values are not that critical.

A # 222 miniature light bulb that's about 2.25 volts 250ma.
(I pulled mine out of a pin light).

I'm going to solder some wires on to the bulb, you may want to buy a socket for the bulb.

Picture one, the parts you need.
Picture two, the resistors.
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  #19  
Old 09-03-2008, 02:28 AM
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The two pictures is what you need to make for testing the IGBT's.

Pix one.
There's no polarity to the resistors just wire them by the picture.
Note, the red wire is plus from the battery.

The ends, are a type of alligator-clip but these have hooks. this will be clipped on the two small pins on the IGBT's.
You will need to find a way to connect the wires to the small pins without soldering to them for the test.


You can use alligator-clips for the whole setup if you want, just check the clips with your meter they don't solder the wires to the clips and 70% of the time the wires make a poor connection.

Pix two.
Self explanatory, I soldered the red plus wire to the bulb and wrapped some wire around the base for the other end.
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  #20  
Old 09-03-2008, 05:48 AM
VW cat VW cat is offline
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I've got the resistors, working on the gathering the other components this morning. Thanks,Phil
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