[Coco] I've killed my CoCo3

Glen Hewlett glen.hewlett at sympatico.ca
Thu Oct 19 23:02:46 EDT 2017 

I’ll second Paul’s comment we really do have a great CoCo community with two offers so far to actually fix Paul’s CoCo 3!  You guys rock!

I did the same thing a few months ago to one of my CoCo 3’s while trying to upgrade the CPU, so don’t feel too bad Paul.  Mine is currently is in really bad shape.  I thought maybe one day I’ll try and hard wire the traces that I wrecked on the mainboard similarly to what Barry Nelson mentioned, but every time I look at it again I feel bad and I get discouraged.

Maybe I could also ask someone with better soldering skills to revive my CoCo 3?

Luckily I was able to successfully upgrade my other CoCo 3 so I still have one working CoCo 3 with a 6309.

Cheers,
Glen

> On Oct 19, 2017, at 1:04 PM, EDDY SZCZERBINSKI <dhaulagiri at hotmail.com> wrote:
> 
> Yes please post a picture.
> 
> I have a similar "operation" to do on a KORG synth and that thread helped me.
> 
> I will probably go with the "jumpers" solution.
> 
> 
> have all a nice day
> 
> 
> Eddy Szczerbinski
> DHAULAGIRI at HOTMAIL.COM <mailto:DHAULAGIRI at HOTMAIL.COM>
> 418 580 8464
> 
> 
> ________________________________
> De : Coco <coco-bounces at maltedmedia.com <mailto:coco-bounces at maltedmedia.com>> de la part de Zippster <zippster278 at gmail.com <mailto:zippster278 at gmail.com>>
> Envoyé : jeudi 19 octobre 2017 12:17
> À : CoCoList for Color Computer Enthusiasts
> Objet : Re: [Coco] I've killed my CoCo3
> 
> Well now you’ve just got me intrigued Paul.  I may have to take pictures.  :)
> 
> - Ed
> 
> 
>> On Oct 19, 2017, at 10:44 AM, Paul Shoemaker <paulfe3 at swbell.net> wrote:
>> 
>> Many thanks to all you guys for the advice, insight and offers of help!  I took Ed up on his offer, which he may regret when I sees what I have in store for him.  What a fantastic CoCo community we have here!
>> 
>> -Paul
>> 
>>     From: dwight.bazinet <dwight.bazinet at gmail.com>
>> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
>> Sent: Thursday, October 19, 2017 9:43 AM
>> Subject: Re: [Coco] I've killed my CoCo3
>> 
>> Hi Ed,
>> 
>> I used to have a full pace kit available to me n my work lab.  I much
>> prefered the vacuum desoldering tool (not the plunger, but the vacuum with
>> the solder filter).  I wouldn't even clip the pins, it would do that good a
>> job cleaning them up.  I used just a small amount of liquid flux prior to
>> heat, and then it would melt right away an hen vacuum, which also drew away
>> the flux.
>> 
>> However, I cn't afford a full Pace kit at home.  I haven't ot one of the
>> cheaper stations because I don't know how well they work, so I use a
>> plunger.  If I was going to do a lot of work I would get sone liquid flux.
>> 
>> Do you prefer braid over a proper vacuum tool?
>> 
>> 
>> 
>> On Oct 19, 2017 9:39 AM, "Zippster" <zippster278 at gmail.com> wrote:
>> 
>>> Hi Paul,
>>> 
>>> I’m sorry it went that way.  I still consider the clip and and desoldering
>>> braid the safest way,
>>> but it is pretty important to have a soldering station where you can
>>> control the temp, and using
>>> a proper tip for the iron.  A ‘drag soldering’ type tip, basically a
>>> straight cylinder with the end cut
>>> at an angle is best (for applying heat to the braid), a chisel tip
>>> probably second best.  Having a
>>> flat surface at the tip allows for faster more accurate heat transfer to
>>> the pad and solder without
>>> excessively heating the board material.  I find the common round pencil
>>> style tips to be one of the least
>>> suitable for anything.  I use a chisel or drag type for everything.  Of
>>> course that’s just my opinion and
>>> everyone has their own way of doing things.
>>> 
>>> All that said, it’s possible the board was degraded or just not up to par
>>> in some way which
>>> helped it fall apart on you.  It can happen.
>>> 
>>> If you want, you can send the board to me, I’m certain I can patch it up
>>> for you.  No charge, just
>>> take care of the shipping.  Unless someone has a motherboard with a dead
>>> GIME out there.
>>> 
>>> - Ed
>>> 
>>> 
>>>> On Oct 19, 2017, at 6:13 AM, Paul Shoemaker <paulfe3 at swbell.net> wrote:
>>>> 
>>>> Hi everyone,
>>>> 
>>>> Yesterday evening I decided to replace the 6809 with a 6309 in my CoCo
>>> 3.  Although I am still an amateur with a soldering iron, I've been
>>> practicing and recently completed this same process on one of my CoCo 2
>>> systems where I clipped out the 6809, desoldered the remaining pins, and
>>> soldered in a socket.  However, when I tried this same approach on my CoCo
>>> 3, as soon as I started using solder wick, I noticed some of the solder
>>> pads began to come off.  I don't think I was using excessive heat (same
>>> iron, same heat settings as before).  Even the traces on the board began to
>>> lift up.  It became clear to me after this happened to a few pads that I
>>> had destroyed the board.
>>>> 
>>>> If anything I was more gentle with the CoCo 3 board than I was with the
>>> CoCo 2 board before.  It was evident that the CoCo3 board was more
>>> "weathered" than any of my other systems...  more dust and dirt inside, a
>>> lot of oxidation on the RF modulator box, etc.  It may be that this CoCo 3
>>> spent many years in a garage or shed prior to me rescuing it from eBay last
>>> year.
>>>> 
>>>> Any advice on how to avoid from happening again this in the future?
>>>> 
>>>> -Paul
>>>> 
>>>> 
>>>> 
>>>> 
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