Emax

--- In emax@yahoogroups.com, "Dave Sotnick" <sotnickd@...> wrote:
> you dont need to spend that much to fix or repair electronic 
  components i repair many synths and samplers all you need is a 
  antistatic Matt to work on a good quality soldering iron and a 
  DE-solder pump these cost about £9 pounds at maplins in the uk

  when desoldering always heat the pin and not the pad 
  heating the pad or the circuit traces makes them bubble free from
  the fiber glass.
  heat the pin as soon as the solder becomes molten
  use the de-solder pump to remove the solder have patience it might
  take more than 1 pump to be rid of all solder you will have to do
  it both sides on a dual layer board

  i always use silver solder with resin flux core to re-solder my
  circuits as it does not corrode the copper pcbs as do some fluxes.

  jammie

  synth and sampler fix uk
  42 Glastonbury crescent
  walsall
  ws3 2rf
  united kingdom

> Reggio,
> 
> I seriously doubt Radio Shack would carry something like this:
> 
> http://www.sparkfun.com/commerce/product_info.php?products_id=609
> 
> They're quite expensive and typically used by technicians at service
centers.
> 
> It is possible to use "desoldering braid" or various kinds of
> desoldering tools (that use suction and heat at the same time) to melt
> and then suck the solder out of soldering joints. I think Radio Shack
> used to sell a soldering iron with desoldering bulb (for suction)
> attached.
> 
> Another thing to watch out for is over-heating components when
> attempting to desolder components/sockets. Heat travels very well
> through the delicate traces on circuit boards, and it's possible to
> damage some components if they get too hot.
> 
> -Dave
> 
> On Mon, Oct 27, 2008 at 9:38 AM, Jip Harrio <harrioj@...> wrote:
> > Julian,
> >
> > It's good to know that you in the process of actually doing this
project. I
> > am about to get started myself.
> >
> > Just curious what this "rework station" is. Is this something I could
> > possibly find at Radio Shack?
> >
> > As I was reviewing step 2 in the "Retro Instructions" I opened up
my Emax
> > and discovered that the trace between 11 and 12 instead of 12-13
on IC2 has
> > already been cut.
> >
> > Do you think that this will create a problem for me? And is there a
> > recommended way to rejoin the trace?
> >
> > I too am planning to add the SCSI port from the back instead of
adding a
> > hard drive.
> >
> > I will be tracking your project in hopes staying safe with this
project. I
> > don't do this type of stuff often but I believe that I can do this
project
> > will some good reference and guidance.
> >
> > Reggio
> >
> > --- On Mon, 10/27/08, Julian <jujulilianan@...> wrote:
> >
> >> From: Julian <jujulilianan@...>
> >> Subject: [emax] emax version 2 board SCSI upgrade in action...
> >> To: emax@yahoogroups.com
> >> Date: Monday, October 27, 2008, 12:00 AM
> >
> >> well, seeing as we're tralking about what it's like
> >> to upgrade a version
> >> 2 emax, I started work on my version 2 board at home
> >> yesterday
> >> afternoon, (having skimmed the mod sheet and seen all the
> >> drawings
> >> thinking it was just a bunch of cut and rewires - and
> >> thinking "ooh!
> >> simple!")
> >>
> >> then as I was going through I got to the dreaded U13....
> >>
> >> So I took the board into work today and just had the socket
> >> out in 2
> >> minutes with a rework station, but if I didn't have one
> >> of those
> >> available to me, it would have been a lot more painful -
> >> would require
> >> cutting up the socket into pieces with your craft knife,
> >> and
> >> pulling/cleaning every pin hole separately - a good half
> >> hour plus of
> >> work, if you wanted to do a neat job.
> >>
> >> so tonight I'll hopefully have time to put in the new
> >> socket (yes the
> >> PCB has a footprint for a 28 pin part - they just only
> >> placed a 24 pin
> >> socket... bastards! all this hassle, and future upgrade
> >> expense for
> >> their customers, so they could save a fraction of a cent
> >> per build!) and
> >> finish the rest of the cutting and wiring.
> >>
> >> sometime later this week I'll double check my work, and
> >> then put it
> >> together and see how the upgrade went.
> >>
> >>
> >> I'd estimate for anyone going to a halfway decent tech
> >> with a basic
> >> desoldering gun, that there's about 1.5 hours work from
> >> sealed case
> >> without the SCSI mods to sealed case with the SCSI mods....
> >> at least for
> >> the version 2 PCB in an emax rack - not sure how simple the
> >> keyboard
> >> comes apart and back together.
> >>
> >>
> >>
> >> I'm also very very interested in taking a SCSI port out
> >> the back of my
> >> emax.... half tempted to do a simple remake of the original
> >> emax version
> >> 2 SCSI adapter PCB. would be very simple to route and make.
> >> might have
> >> to spend an hour or two working out what pins on the 50 way
> >> headers
> >> route to the header that goes to the D25.... will
> >> research.... If I do
> >> make a design up, I'll be getting a bunch of them
> >> made.... is anyone
> >> else interested in this?
> >>
> >>
> >>
> >>
> >>
> >> --
> >> http://bleepin.com
> >>
> >> --
> >> http://www.fastmail.fm - The way an email service should be
> >
> >
>