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#1 2014-06-11 08:16:34

uniserver
Member
From: Sf, Mi
Registered: 2014-05-15
Posts: 956
Website

Any Cap GOO leak? WASH!

I hate to sound like a broken record.

I had another board tonight,  A classic II, Rev A.

De-cap /  Flux & Wick -- Pad scrub,  / Acetone & QTips Clean up. / Lay new solder down on one pad / Solder down and align all the new caps...  Then
Solder the other side...   Only To re-flux and go over all the soldered joints again, just to make them all look pretty.   Then Acetone again and Q-Tips to clean up
any flux residue.

Try the board...  NO tone.. Square Blocks..   Pulled back out.. Scrubbed some I/C's with Tooth brush and acetone.

Nope...  Then i said OK here.  Back to basics... lets wash this thing.  Sure enough, The washing process also lets you see some cap goo that you might not have caught before...

Washed really good.. then compressor dry.

And Bam works...   A complete board wash & dry, is just as important as the re-cap its self... that conductive leaking GOO is bad bad bad!


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#2 2014-06-12 01:01:29

techknight
Member
Registered: 2014-05-22
Posts: 453

Re: Any Cap GOO leak? WASH!

and the bad thing is, the electrolyte isnt supposed to be conductive. its part of the dialectic which is an insulative layer. Go figure, gotta love bad electrolytics.

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#3 2014-06-12 18:01:45

cc333
Member
From: North S.F. Bay Area, CA
Registered: 2014-05-23
Posts: 600

Re: Any Cap GOO leak? WASH!

Yeah, my method is to wash it in the dishwasher, but with a twist.

Our dishwasher has a heating element for quickly drying pots and pans, so I put the board I'm washing on the top shelf, making sure it's not too close to the element, and once it's been washed, I let it go through maybe a one and a half to two drying cycles, maybe more depending on how dry it gets.

It is probably not the best, but it has never caused me any problems, and it's relatively quick and straightforward.

c


Main Macs: Early '09 Mac Pro, Mid '12 MacBook Pro 13"
Secondary Macs: Early '08 Mac Pro, Mid '12 MacBook Pro 15"
Playthings: Mac SE/30, 3.0 GHz Mavericks-based HackServe, Many others....
Desired: Lisa, Kanga PowerBook G3, Apple IIc, Apple II, Spare parts, etc.

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#4 2014-06-12 21:51:50

uniserver
Member
From: Sf, Mi
Registered: 2014-05-15
Posts: 956
Website

Re: Any Cap GOO leak? WASH!

To be honest you can wash the board any way you want.. just as long as it gets the job done.

now the Drying part…  the only way to properly dry off a mainboard is to take it… Right after you wash it.
and Blast it off with the air compressor.. getting all the water off!

Blow out the I/C's ,  Blow out the ROM sockets…  Blow out under power headers… Blow out Ram Simm Slots.

Letting a board sit after a wash… or using the Drying element in your dish washer…
Could open you up to residue issues.. when a blast off with a compressor does the trick every time.

Also you eat off the dishes from the dish washer..    All i can say is … 
LEAD - FLITH - CAPGOO    dishwashers are not perfect in waste water evacuation.
plus who knows where all those contaminants will reside with in the dish washer .

Some toxins are collective, they build up in your body.

Last edited by uniserver (2014-06-12 21:52:40)


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#5 2014-06-12 21:53:44

jt
Member
From: Bermuda Triangle, NC USA
Registered: 2014-05-21
Posts: 1,469

Re: Any Cap GOO leak? WASH!

I love my twin ChiMerican nieces to pieces, but I loathe old Chinese capacitors. What year did they steal that capacitor formulation, implement it badly and flood the world with guaranteed to to fail electronics components?

When did the POS capacitors hit the consumer electronics distribution cycle and when did the Chinese stop making those horrid things, barring that, when did manufacturers wise up and stop sourcing them?

I've got some Y2K era stuff I might be able to fix. I've got a rack full of Radio Shack's RCA Gear, a 5.1 receiver, 100CD Player, Cassette Duping Deck, VCD etc. Some of it works, some doesn't and the 5.1 Receiver is flaky as hell. I figure some good quality Caps are in order  .  .  .

.  .  .  a dishwasher cleaning cycle sounds like hell for analog AV Gear though. tongue

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#6 2014-06-13 03:08:37

jt
Member
From: Bermuda Triangle, NC USA
Registered: 2014-05-21
Posts: 1,469

Re: Any Cap GOO leak? WASH!

Yep, I found a Google article on it. The RCA A/V gear I bought was from the worst of the period. One of the kids at work said he thought it was all a secret plot by Radio Shack. It seemed to him like all they sold for the years he worked there were replacements for failed Taiwanese Electrolytics.

And here I was blaming China! Taiwan isn't China and they usually made really good stuff in that era. hmm

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ThinkClassic specialises in the use, maintenance, repair, restoration and modification of vintage computers and peripherals.