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Discussion Starter · #1 ·
The damage is confined to one end of the control board & appears to be
moisture damage. The main worry I can see about fixing it is that there are
parts no longer easily obtained. There is an HV9120P PWM controller for
example which has the remains of a bug between pins 1 & 2 on the under side.
It appears to have been there a long time as it is mummified It has also
blown out on the top surface above pin 5. There is an IRF740 which has
flashed from source to drain which may have initiated the failure. On the
basis of this inspection Ill see if I can get the tricky parts & have a go
at fixing it. David

--------------------------------------------------
From: "David Sharpe" <[email protected]>
Sent: Monday, January 24, 2011 11:12 AM
To: "Electric Vehicle Discussion List" <[email protected]>
Subject: Re: [EVDL] Failed DC Power Systems Controller 144V 400A
(1200shortterm) last fixed in 2000.

> I have inspected the Raptor. There are a number of transistors that have
> failed by blowing apart but I cannot see damage to the Mosfets. They
> measure
> correctly, high resistance and diode in reverse direction. They are sealed
> in silicone compound. I have set of circuit drawings & will attempt a
> repair myself. Will advise outcome. David
>
>

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70 Posts
Discussion Starter · #2 ·
David,
Have you spoken with Peter Senkowski in your search for parts? He is still
in production of the Raptor (as well as the T-Rex). Contact me off line for
his # if you don't have it.
-Tom True

David Sharpe <[email protected]>wrote:

> The damage is confined to one end of the control board & appears to be
> moisture damage. The main worry I can see about fixing it is that there are
> parts no longer easily obtained. There is an HV9120P PWM controller for
> example which has the remains of a bug between pins 1 & 2 on the under
> side.
> It appears to have been there a long time as it is mummified It has also
> blown out on the top surface above pin 5. There is an IRF740 which has
> flashed from source to drain which may have initiated the failure. On the
> basis of this inspection Ill see if I can get the tricky parts & have a go
> at fixing it. David
>
> --------------------------------------------------
> From: "David Sharpe" <[email protected]>
> Sent: Monday, January 24, 2011 11:12 AM
> To: "Electric Vehicle Discussion List" <[email protected]>
> Subject: Re: [EVDL] Failed DC Power Systems Controller 144V 400A
> (1200shortterm) last fixed in 2000.
>
> > I have inspected the Raptor. There are a number of transistors that have
> > failed by blowing apart but I cannot see damage to the Mosfets. They
> > measure
> > correctly, high resistance and diode in reverse direction. They are
> sealed
> > in silicone compound. I have set of circuit drawings & will attempt a
> > repair myself. Will advise outcome. David
> >
> >
>
> _______________________________________________
> | REPLYING: address your message to [email protected] only.
> | Multiple-address or CCed messages may be rejected.
> | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> | OTHER HELP: http://evdl.org/help/
> | OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
>



--
Remember, it is not that the glass is half empty, in reality, the glass is
merely twice the size that it needs to be! -TNT'82
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