Is this dead or can be repaired ? - SailNet Community
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post #1 of 13 Old 11-06-2013 Thread Starter
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Is this dead or can be repaired ?

Following my previous thread, I'd like to have your opinion on this Ample Power 120A alternator.
Is it dead or can be repaired ?

Anyboby knows where I can get the Service Manual ?
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Last edited by smariani61; 11-06-2013 at 05:51 AM.
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post #2 of 13 Old 11-06-2013
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Re: Is this dead or can be repaired ?

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Originally Posted by smariani61 View Post
Following my previous thread, I'd like to have your opinion on this Ample Power 120A alternator.
Is it dead or can be repaired ?

Anybody knows where I can get the Service Manual ?
It might be wise to contact Ample Power directly. See Ample Power Contact

"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."
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post #3 of 13 Old 11-06-2013
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Re: Is this dead or can be repaired ?

Anything can be fixed BUT it may not be cost effective.

Check to see if you have continuity on the rotor and all stater windings.

Also check for blown diodes. Usually just one goes.

The slip rings look OK.

Check to see if the bearings run smoothly, cheap replacement item.
If you were in Grenada I would tell you to take it to Al Bernadine who would soon have it working again.
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post #4 of 13 Old 11-06-2013 Thread Starter
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Re: Is this dead or can be repaired ?

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Anything can be fixed BUT it may not be cost effective.

Check to see if you have continuity on the rotor and all stater windings.

Also check for blown diodes. Usually just one goes.

The slip rings look OK.

Check to see if the bearings run smoothly, cheap replacement item.
If you were in Grenada I would tell you to take it to Al Bernadine who would soon have it working again.
I took it today to an electrical shop.
It looks like the continuity is ok.
The diods look ok.
The bearing needs to be changed.
There is on cable that connect the diods that looks broken (fired).
I hope it can work again !!!

It would be nice to be in Grenada instead of in Rome ... and working

Thanks
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post #5 of 13 Old 11-07-2013 Thread Starter
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Re: Is this dead or can be repaired ?

Bad news. It looks like one of the diode is gone.
I've asked for the spare diodes here in italy.
Is it possible that the price is euros 180 + shipment ????
Unbelivable !!!

Is it possible to find compatible diodes and change them on the board ?

Thanks.
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post #6 of 13 Old 11-07-2013
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Re: Is this dead or can be repaired ?

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Bad news. It looks like one of the diode is gone.
I've asked for the spare diodes here in italy.
Is it possible that the price is euros 180 + shipment ????
Unbelivable !!!

Is it possible to find compatible diodes and change them on the board ?

Thanks.
That is what I would do, diodes are cheap, even top quality ones. I would get the numbers off them and start checking electrical supply houses and electronics repair shops. Last time I swapped out a diode, I stopped by an electronics repair shop and chatted with the owner, he gave me the diodes, they are not hard to solder in either. Just use a low wattage soldering iron. This is where a cheap soldering iron is often good, as they tend to not be very powerful.
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post #7 of 13 Old 11-08-2013 Thread Starter
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Re: Is this dead or can be repaired ?

Thanks.
This is what I'll try to do !!!
I really do not accept to pay a simple electronics item ten times its real price.
The marine market is very often without rules !!!
Hope will find the diode and change it without damage the board.
Will let you know ...

P.S. - anybody can help me to know which diodes I've to look for, and where is possible to buy them (not at AmplePower) ? Thanks.

Last edited by smariani61; 11-08-2013 at 09:40 AM.
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post #8 of 13 Old 11-11-2013 Thread Starter
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Re: Is this dead or can be repaired ?

Now, I can post the picture of the dead diode.
Anybody can help to find what kind of specs it has ??

I only know that it should be 200 V.

Thanks a lot
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post #9 of 13 Old 11-11-2013
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Re: Is this dead or can be repaired ?

There is a huge market in diodes depending on who you get them from. The places that actually sell at wholesale, usually will only sell to a business. Sometimes you can find a way to buy from them.

Usually they will sell a "diode frame", the mounted complete set of diodes, and not single diodes. Single diodes often must be press fit into place, and if something damaged one (as opposed to it failing from a flaw) there is reason to replace the entire frame.

So you can try to find one diode from an electronics house, or you can try to find a complete diode frame set from a wholesaler. Either way will take some time and sleuthing unless a local alternator shop can hook you up. If you can find a tv or electronics repair shop, they may be able to locate the one diode for you as well.

If the diodes have any numbering or marking on them, that can be looked up to find out what they are.
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post #10 of 13 Old 11-11-2013 Thread Starter
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Re: Is this dead or can be repaired ?

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There is a huge market in diodes depending on who you get them from. The places that actually sell at wholesale, usually will only sell to a business. Sometimes you can find a way to buy from them.

Usually they will sell a "diode frame", the mounted complete set of diodes, and not single diodes. Single diodes often must be press fit into place, and if something damaged one (as opposed to it failing from a flaw) there is reason to replace the entire frame.

So you can try to find one diode from an electronics house, or you can try to find a complete diode frame set from a wholesaler. Either way will take some time and sleuthing unless a local alternator shop can hook you up. If you can find a tv or electronics repair shop, they may be able to locate the one diode for you as well.

If the diodes have any numbering or marking on them, that can be looked up to find out what they are.
Many thanks.
There are no numbers on the diodes.
There is only "USA" and a letter "R". That's it.
I'd like to buy the complete set of 6 diodes (3 positive + 3 negative).
Ciao
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