[TenTec] reballing a Dragon

[Clayton Brantley]

Dragons are bad enough to deal with, much less re-balling them!  My advice is to let them
alone and you'll not be missing things that are important to your survival.

Clayton N4EV
--------------------------------------------
On Fri, 4/1/16, Wade Staggs <tvman1954 at gmail.com> wrote:

 Subject: Re: [TenTec] reballing a Dragon
 To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
 Date: Friday, April 1, 2016, 4:57 PM
 
 *Really simplified version.... O.K.?
 Back in the good old days, electronic
 components had wire leads. Now we have SMT or Surface Mount
 Technology. So
 now on Microprocessors and other LSI or Large Scale
 Integration components.
 There are tiny Pads or Lands on the bottom of the device. At
 the factory
 these components have tiny Balls of solder on each lead,
 sometimes over 200
 leads or pin connections could be on the device. In the new
 technology, the
 Chip is placed on the board by a very fast and precise
 machine. The board
 will then go through a multi-stage Oven which has a minimum
 of Heat-up,
 Solder or Bond and then the cool down stage. Going through
 this oven on a
 conveyor belt, the oven can be over 50 feet long. The
 circuit board has no
 holes for component leads to pass through. I have repaired
 many video games
 and other devices with a simple Paint Stripping Gun. It
 takes a light hand
 and a handheld infrared thermometer is a must so that you
 don't cook the
 board. It is very easy to do lots more harm to the device.
 Repairs of the
 Xbox 360 have financed several of my Boat Anchor Restoration
 Projects. Try
 goggling " The Red Ring of Death "*
 *
 73 from Wade/KJ4WS*
 
 On Fri, Apr 1, 2016 at 1:04 PM, Tony <va3dwi at gmail.com>
 wrote:
 
 > Showing my age here hi... hi. What's reballing?
 Thanks.
 > 73, Tony VE3DWI.
 >
 > Sent from my BlackBerry 10 smartphone on the Bell
 network.
 >   Original Message
 > From: John Henry
 > Sent: Thursday, March 31, 2016 13:03
 > To: tentec at contesting.com
 > Reply To: Discussion of Ten-Tec Equipment
 > Subject: [TenTec] reballing a Dragon
 >
 > The problem wasn't always in reballing.
 > There were problems in that the part sat on a shelf for
 15 years, not in a
 > clean room, and somewhere along the line got hit with
 ESD, or too hot one
 > day, random circuits inside the chip failed, etc.
 >
 > I do however doubt that if 20 people tried to scavenge
 some dragonballs and
 > had to replace it, well, maybe 4 in 20 would be happy
 at the end of the
 > day, the other 16 would probably be buying a new rig.
 just my two cents.
 > So many pitfalls along the way, the chips are at least
 15 years old,
 > storage, excessive heat, etc.
 > Yield of TEN-TEC trying to do this using a couple of
 excellent BGA board
 > houses to replace them was very low.
 >
 > 73, KI4JPL
 > John Henry
 > _______________________________________________
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 > TenTec at contesting.com
 > http://lists.contesting.com/mailman/listinfo/tentec
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 > TenTec mailing list
 > TenTec at contesting.com
 > http://lists.contesting.com/mailman/listinfo/tentec
 >
 
 
 
 -- 
 *Living one day at a time with Jesus as my Savior. But,
 still having Fun.*
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