Vintage Synth Repair

Hi all, I've got a simple question for a simple problem.

unit: boss dr 770 drum machine

problem: 1 of 3 prongs holding the 14v ac plug housing (inside the 
unit itself) to the main circuit board has broken its solder (mearly 
separated actually).  If I plug the unit in and apply pressure 
laterally to where the power supply plugs into the unit, it will 
restore contact and turn the unit on, but as soon as pressure is 
released, it loses power and shuts off.

It would cost $25 to have it fixed in town, and I don't have that 
kind of money at the moment for anything other than food.  I have a 
solder pen and some non-lead flux.  I've successfully assembled a big 
briar etherwave theremin kit.  Do I have the skill needed to fix this 
problem myself?  The original solder of the broken point is so tidy, 
will I be able to make a new connection as secure and safe as the 
old?  Do I have to de-solder first - or just re-solder?

I can even scan in the broken solder point and e-mail a picture of it 
if this would help.  I just really need to save money wherever 
possible.

Any help would be VERY much appreciated.

thanks in advance guys - I wanna nail this repair job the first time.

-pk

Sounds like you can do it. I'd just heat the existing solder to get it
to rebond. If it cracks again down the road it might be a good idea to
de-solder, get rid of any rosin, and then resolder the prongs. I need to
find time to do the same thing to my electric shaver over X-mas break :)

scott

patrickkeller@... wrote:
> 
> 
> Hi all, I've got a simple question for a simple problem.
> 
> unit: boss dr 770 drum machine
> 
> problem: 1 of 3 prongs holding the 14v ac plug housing (inside the
> unit itself) to the main circuit board has broken its solder (mearly
> separated actually).  If I plug the unit in and apply pressure
> laterally to where the power supply plugs into the unit, it will
> restore contact and turn the unit on, but as soon as pressure is
> released, it loses power and shuts off.
> 
> It would cost $25 to have it fixed in town, and I don't have that
> kind of money at the moment for anything other than food.  I have a
> solder pen and some non-lead flux.  I've successfully assembled a big
> briar etherwave theremin kit.  Do I have the skill needed to fix this
> problem myself?  The original solder of the broken point is so tidy,
> will I be able to make a new connection as secure and safe as the
> old?  Do I have to de-solder first - or just re-solder?
> 
> I can even scan in the broken solder point and e-mail a picture of it
> if this would help.  I just really need to save money wherever
> possible.
> 
> Any help would be VERY much appreciated.
> 
> thanks in advance guys - I wanna nail this repair job the first time.
> 
> -pk
> 
> 
> To unsubscribe from this group, send an email to:
> vintagesynthrepair-unsubscribe@egroups.com

-- 
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  Visit the the home of Hebephrenic, The Hot Buttered Elves, & Sunshine

           http://ourworld.compuserve.com/homepages/tape_hiss

         and our sites on the worlds largest online cut-out bin

                  http://www.mp3.com/hotbutteredelves
                    http://www.mp3.com/hebephrenica
~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%

--- In vintagesynthrepair@egroups.com, tapehiss <102465.41@c...> 
wrote:
> Sounds like you can do it. I'd just heat the existing solder to get 
it
> to rebond. If it cracks again down the road it might be a good idea 
to
> de-solder, get rid of any rosin, and then resolder the prongs. I 
need to
> find time to do the same thing to my electric shaver over X-mas 
break :)
> 
> scott
> 

Thanks scott, I'll give it a try.  If I'm just heating the prong in 
question to melt the solder, what are my chances of doing any damage 
to the unit (I've got one of those low-power "pen" irons)?

appreciate the help,

patrick k.


> patrickkeller@h... wrote:
> > 
> > 
> > Hi all, I've got a simple question for a simple problem.
> > 
> > unit: boss dr 770 drum machine
> > 
> > problem: 1 of 3 prongs holding the 14v ac plug housing (inside the
> > unit itself) to the main circuit board has broken its solder 
(mearly
> > separated actually).  If I plug the unit in and apply pressure
> > laterally to where the power supply plugs into the unit, it will
> > restore contact and turn the unit on, but as soon as pressure is
> > released, it loses power and shuts off.
> > 
> > It would cost $25 to have it fixed in town, and I don't have that
> > kind of money at the moment for anything other than food.  I have 
a
> > solder pen and some non-lead flux.  I've successfully assembled a 
big
> > briar etherwave theremin kit.  Do I have the skill needed to fix 
this
> > problem myself?  The original solder of the broken point is so 
tidy,
> > will I be able to make a new connection as secure and safe as the
> > old?  Do I have to de-solder first - or just re-solder?
> > 
> > I can even scan in the broken solder point and e-mail a picture 
of it
> > if this would help.  I just really need to save money wherever
> > possible.
> > 
> > Any help would be VERY much appreciated.
> > 
> > thanks in advance guys - I wanna nail this repair job the first 
time.
> > 
> > -pk
> > 
> > 
> > To unsubscribe from this group, send an email to:
> > vintagesynthrepair-unsubscribe@egroups.com
> 
> -- 
> ~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
~%~%~%
>   Visit the the home of Hebephrenic, The Hot Buttered Elves, & 
Sunshine
> 
>            http://ourworld.compuserve.com/homepages/tape_hiss
> 
>          and our sites on the worlds largest online cut-out bin
> 
>                   http://www.mp3.com/hotbutteredelves
>                     http://www.mp3.com/hebephrenica
> ~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
~%~%~%

The chances of doing damage are negligible as long as you are careful
not to let the solder run all over the place. With a low-power pen the
potential for damage is even smaller. Really it should be a quick repair
just heat for a few seconds and as soon as the solder reliquifies +
rebonds take the heat away. That's it.

Good luck

Scott

patrickkeller@... wrote:

> Thanks scott, I'll give it a try.  If I'm just heating the prong in
> question to melt the solder, what are my chances of doing any damage
> to the unit (I've got one of those low-power "pen" irons)?
> 
> appreciate the help,
> 
> patrick k.
> 

-- 
~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
  Visit the the home of Hebephrenic, The Hot Buttered Elves, & Sunshine

           http://ourworld.compuserve.com/homepages/tape_hiss

         and our sites on the worlds largest online cut-out bin

                  http://www.mp3.com/hotbutteredelves
                    http://www.mp3.com/hebephrenica
~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%

--- In vintagesynthrepair@egroups.com, tapehiss <102465.41@c...> 
wrote:
> The chances of doing damage are negligible as long as you are 
careful
> not to let the solder run all over the place. With a low-power pen 
the
> potential for damage is even smaller. Really it should be a quick 
repair
> just heat for a few seconds and as soon as the solder reliquifies +
> rebonds take the heat away. That's it.


thanks scott!
> 
> Good luck
> 
> Scott
> 
> patrickkeller@h... wrote:
> 
> > Thanks scott, I'll give it a try.  If I'm just heating the prong 
in
> > question to melt the solder, what are my chances of doing any 
damage
> > to the unit (I've got one of those low-power "pen" irons)?
> > 
> > appreciate the help,
> > 
> > patrick k.
> > 
> 
> -- 
> ~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
~%~%~%
>   Visit the the home of Hebephrenic, The Hot Buttered Elves, & 
Sunshine
> 
>            http://ourworld.compuserve.com/homepages/tape_hiss
> 
>          and our sites on the worlds largest online cut-out bin
> 
>                   http://www.mp3.com/hotbutteredelves
>                     http://www.mp3.com/hebephrenica
> ~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
~%~%~%

thanks for the help, I soldered it up and it works perfect - I 
appreciate all the resposes, you guys saved me at least $30!

-pk

--- In vintagesynthrepair@egroups.com, patrickkeller@h... wrote:
> --- In vintagesynthrepair@egroups.com, tapehiss <102465.41@c...> 
> wrote:
> > The chances of doing damage are negligible as long as you are 
> careful
> > not to let the solder run all over the place. With a low-power 
pen 
> the
> > potential for damage is even smaller. Really it should be a quick 
> repair
> > just heat for a few seconds and as soon as the solder reliquifies 
+
> > rebonds take the heat away. That's it.
> 
> 
> thanks scott!
> > 
> > Good luck
> > 
> > Scott
> > 
> > patrickkeller@h... wrote:
> > 
> > > Thanks scott, I'll give it a try.  If I'm just heating the 
prong 
> in
> > > question to melt the solder, what are my chances of doing any 
> damage
> > > to the unit (I've got one of those low-power "pen" irons)?
> > > 
> > > appreciate the help,
> > > 
> > > patrick k.
> > > 
> > 
> > -- 
> > ~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
~%
> ~%~%~%
> >   Visit the the home of Hebephrenic, The Hot Buttered Elves, & 
> Sunshine
> > 
> >            http://ourworld.compuserve.com/homepages/tape_hiss
> > 
> >          and our sites on the worlds largest online cut-out bin
> > 
> >                   http://www.mp3.com/hotbutteredelves
> >                     http://www.mp3.com/hebephrenica
> > ~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
~%
> ~%~%~%