Re: Motherboard Caps, was: Re: Mac SE/30

[Dowe G. Keller]

Daniel Kendell wrote:

> I had a IIci that died because the tracks were eaten away on the
> logicboard. Is is possible to repair the tracks if they've already been
> damaged? What electronics skill level would it need?
>
> I don't have the IIci anymore, but i'd like to know still. :)
>
> Dan

I would think  just a carefully placed drop of solder would do.

--
Dowe Keller [EMAIL PROTECTED]


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Re: Motherboard Caps, was: Re: Mac SE/30

[Clark Martin]

At 4:58 PM + 2/4/05, Daniel Kendell wrote:
I had a IIci that died because the tracks were eaten away on the 
logicboard. Is is possible to repair the tracks if they've already 
been damaged? What electronics skill level would it need?

I don't have the IIci anymore, but i'd like to know still. :)
Sure, just clean up the area, remove the solder mask from the ends of 
the traces remaining and solder fine wire across the gap.  For 
something like this I'd use wirewrap wire (40 AWG), with or without 
the insulation, depending on how long they are.
--
Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting

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Re: Motherboard Caps, was: Re: Mac SE/30

[Daniel Kendell]

I had a IIci that died because the tracks were eaten away on the 
logicboard. Is is possible to repair the tracks if they've already been 
damaged? What electronics skill level would it need?

I don't have the IIci anymore, but i'd like to know still. :)
Dan
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Re: Motherboard Caps, was: Re: Mac SE/30

[Clark Martin]

At 10:47 PM -0600 2/3/05, Jeff Walther wrote:
Date: Wed, 02 Feb 2005 22:47:17 -0500
Subject: Re: Mac SE/30
From: "classic" <[EMAIL PROTECTED]>

Never knew that about the caps and I have a Classic Ii and 840av I should
probably check them.
The IIci is also subject to that problem.   In the IIci it manifests 
as problems in the power-on circuitry, because they are positioned 
such that the leakage eats through the traces for the power-on 
circuitry on the motherboard.

I wonder about the long-term effects of the dishwasher fix.  It 
removes the current leakage, which is good, but do the caps continue 
to leak?  If so, they might damage actual traces or solder joints 
before one realizes that the board needs washing again.   I think 
it's generally better to get the leaky caps off of the board and 
replace them--with nice tantalum caps that don't leak, if possible.
Oh, definitely replace the caps.  From what I've heard more of the 
problems are due to the failed caps than to electrolyte leakage.

--
Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting
"I'm a designated driver on the Information Super Highway"
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Motherboard Caps, was: Re: Mac SE/30

[Jeff Walther]

Date: Wed, 02 Feb 2005 22:47:17 -0500
Subject: Re: Mac SE/30
From: "classic" <[EMAIL PROTECTED]>

Never knew that about the caps and I have a Classic Ii and 840av I should
probably check them.
The IIci is also subject to that problem.   In the IIci it manifests 
as problems in the power-on circuitry, because they are positioned 
such that the leakage eats through the traces for the power-on 
circuitry on the motherboard.

I wonder about the long-term effects of the dishwasher fix.  It 
removes the current leakage, which is good, but do the caps continue 
to leak?  If so, they might damage actual traces or solder joints 
before one realizes that the board needs washing again.   I think 
it's generally better to get the leaky caps off of the board and 
replace them--with nice tantalum caps that don't leak, if possible.

Jeff Walther
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