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Neon_WA



Joined: 08 Nov 2008
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PostPosted: Thu Feb 02, 2012 7:43 pm    Post subject: GB question Reply with quote

Seeing CPUShack isnt around at the moment.. trying to work out best way to approach this

If there was some special chips soldered onto a board what would you prefer to do
guessing boards are between 1 - 2 lb

A) get whole board shipped from the US

B) pay to have them shipped within US to someone who can desolder them, then ship to you

C) wait till CPUShack gets back, then ship boards to him to desolder.. and ship with your avicc items

D) some thing i havent thought of

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smithy



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PostPosted: Thu Feb 02, 2012 7:45 pm    Post subject: Reply with quote

A) or....

D) get them shipped to you to desolder, then you can ship the chip to me
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Robev



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PostPosted: Thu Feb 02, 2012 8:28 pm    Post subject: Reply with quote

Very Happy Naaaaaaaaa

Just Ship them to me I will desolder the Chips n send you the boards Evil or Very Mad

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Neon_WA



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PostPosted: Thu Feb 02, 2012 8:37 pm    Post subject: Reply with quote

smithy wrote:
D) get them shipped to you to desolder

You need the practice Laughing

Robev wrote:
Just Ship them to me I will desolder the Chips n send you the boards Evil or Very Mad

Get back to work sorting those Pentiums Laughing

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Robev



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PostPosted: Thu Feb 02, 2012 8:40 pm    Post subject: Reply with quote

Neon_WA wrote:
Get back to work sorting those Pentiums Laughing


aye aye Capn

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Neon_WA



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PostPosted: Thu Feb 02, 2012 10:01 pm    Post subject: Reply with quote

smithy wrote:
D) get them shipped to you to desolder, then you can ship the chip to me


As these are coated boards.. I find removing the coating off the chips before desoldering them gives better results
but does take some more work

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johnorun



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PostPosted: Fri Feb 03, 2012 12:31 am    Post subject: Reply with quote

I have desoldered several boards from Group buys in the past and I'd consider volunteering if I had more details of the parts to be de-soldered. Confused
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Neon_WA



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PostPosted: Sun Feb 05, 2012 10:24 pm    Post subject: Reply with quote

johnorun wrote:
I'd consider volunteering if I had more details of the parts to be de-soldered. Confused


happy to say now.. will be mil spec 80C196 & 80C186 boards
got a few more coming.. so will post when the rest arrive

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gshv



Joined: 01 Feb 2003
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PostPosted: Mon Feb 06, 2012 12:59 am    Post subject: Reply with quote

How difficult is to desolder those with proper tools?

Gennadiy
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Neon_WA



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PostPosted: Mon Feb 06, 2012 1:09 am    Post subject: Reply with quote

gshv wrote:
How difficult is to desolder those with proper tools?

Gennadiy


for best results on PGA chips.. small blow torch the best, rather than heat gun

I generally heat up.. then tap excess solder out
then repeat till no more solder comes loose

the tricky part is making a tool to pull the chip out straight and that wont damage the ceramic

These have a added complication of being coated boards & chips

Some of these boards do have the extra chip.. so something to practice on

If people wanted to try this at home.. I was going to write out a step by step procedure
and things to watch out for

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Last edited by Neon_WA on Mon Feb 06, 2012 1:15 am; edited 1 time in total
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gshv



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PostPosted: Mon Feb 06, 2012 1:15 am    Post subject: Reply with quote

I should have a blow torch somewhere. I'll practice on the second chip.

Gennadiy
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Neon_WA



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PostPosted: Mon Feb 06, 2012 1:17 am    Post subject: Reply with quote

gshv wrote:
I should have a blow torch somewhere. I'll practice on the second chip.

Gennadiy


just get solder so it just molten
also.. you will have to apply torch from underneath, other wise solder can run up pins towards the ceramic

the reason for tapping solder out first, is that when you do go to pull chip out..
you dont end up with solder daggs hanging off the pins (lot harder to remove once chip is pulled)

depends on how of a perfectionist you are in how you want the pins to look
I'm at one end of the scale.. and CPUShack is at the other end Laughing

using a small blow torch, things do get hotter quicker so keep the flame moving
if any caps near where you are applying the heat.. then wear glasses just in case one goes off

as for tool to remove the chip.. I use tongs like the 3rd & 4th set across
The 3rd is for smaller or easy ones.. the 4th is great for PGA with 200+ pins



They have a wide grip and I have bent some differently depending on what size chip I am pulling
and I replace the insulating fabric with some thin cork sheeting

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Neon_WA



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PostPosted: Tue Feb 07, 2012 7:27 pm    Post subject: Reply with quote

the other boards should arrive on the 9th
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susl45



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PostPosted: Tue Feb 07, 2012 7:37 pm    Post subject: Reply with quote

Stu is going to have many spceial tool for cpu processing,LOL
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Neon_WA



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PostPosted: Tue Feb 07, 2012 7:47 pm    Post subject: Reply with quote

if I can make a tool to make the job easier & quicker.. I do
having a full workshop here at work does make it easier to manufacture an array of tools

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