Dynomotion

Group: DynoMotion Message: 8686 From: fouijar Date: 11/17/2013
Subject: JP12 Expansion board
Hello Tom,

A while ago I bought and connected an expansion board for the Kanalog JP12 connector from Winford Engineering and I think I did something wrong. Since this board and this connection isn't protected I think I burned some of the inputs of JP12.
My questions are:
Can I repair or it's directly linked to KFlop? (I suspect no)
Is is possible to repair under a more professional service?
If not possible, what do you propose?

Best regards,

Jerome
Group: DynoMotion Message: 8688 From: Tom Kerekes Date: 11/19/2013
Subject: Re: JP12 Expansion board
Hi Jerome,

In most cases it is not cost effective to try to repair boards as it is very labor intensive.  The boards needs to be shipped, diagnosed, replacement parts obtained , repaired, cleaned, tested, and shipped back.  Sometimes the problems are is too difficult to diagnose.  Sometimes the board is damaged while being repaired.  We usually offer an option for you to send us the board.  If we find it to be something simple to fix we will repair, test, and return it for a $99 fee.  I we are unable to repair it there will be no charge.

In your case if you shorted JP12 then most likely U30 is damaged.  If you wish to try to replace it yourself it is a SN74HC165PWR IC.  If you don't have access to hot air surface mount removal tools a razor blade can usually be used to cut all the leads near the chip body.  Then the leads can be easily removed with a soldering iron, the pads cleaned with solder wick, and the new chip installed.

Regards
TK

Group: DynoMotion Message: 8694 From: fouijar Date: 11/20/2013
Subject: Re: JP12 Expansion board
Tom,

Thanks for your feedback. I checked the board and located the U30 IC, just below the KFlop :p
Well, I remember the trick since I had some troubles and broke the SW7, SW.... output FETs and I fixed the faulty chips as you described.
I'll probably go for a new board and fix the old one to have a backup plan.
I still need to check, somebody asked me to make a CNC conversion of his knee mill setup, maybe at that time.

Regards, J.

 



---In DynoMotion@yahoogroups.com, <tk@...> wrote:

Hi Jerome,

In most cases it is not cost effective to try to repair boards as it is very labor intensive.  The boards needs to be shipped, diagnosed, replacement parts obtained , repaired, cleaned, tested, and shipped back.  Sometimes the problems are is too difficult to diagnose.  Sometimes the board is damaged while being repaired.  We usually offer an option for you to send us the board.  If we find it to be something simple to fix we will repair, test, and return it for a $99 fee.  I we are unable to repair it there will be no charge.

In your case if you shorted JP12 then most likely U30 is damaged.  If you wish to try to replace it yourself it is a SN74HC165PWR IC.  If you don't have access to hot air surface mount removal tools a razor blade can usually be used to cut all the leads near the chip body.  Then the leads can be easily removed with a soldering iron, the pads cleaned with solder wick, and the new chip installed.

Regards
TK