Vintage Synth Repair

Hi Davide

 

A couple of points.  Firstly alkaline acid is a contradiction in terms!  A
substance is either acid OR alkaline it cannot be both.  Vinegar is acetic
acid and I would never ever recommend it to clean an electronic printed
circuit.

 

Secondly if the battery has leaked it is useless and will still leak and
cause trouble so get it out quickly and then clean up with the bicarb.

 

Without a circuit diagram it is impossible for me to suggest what that
capacitor is there for, perhaps someone else on this list who has worked on
the unit can identify it for us.

 

Regards

 

Brian G3OYU

 

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From: vintagesynthrepair@yahoogroups.com
[mailto:vintagesynthrepair@yahoogroups.com] On Behalf Of
pasquale.aprea@...
Sent: Thursday, 12 May, 2005 18:49
To: vintagesynthrepair@yahoogroups.com
Subject: RE: [vintagesynthrepair] siel DK-600 expander

 

thanks a lot Brian!
i just bought bicarbonate of soda, i'll have another go at cleansing it
soon.


The first time i did it i did use white vinegar as someone adviced me, then
rinsed it with water. 
the battery is still in place though, a 3v lithium one i suppose.
While vinegar is said to be effective against alkaline acid, i don't know
about lithiums,but no damaged should a little vinegar bath have done.

As for the capacitor, if you are curios, its the very first one at the left
of IC16. you can see it here
http://www.freewebtown.com/savojr/dk600/pics/battery-removed.jpg.

Or just follow the link to "battery removed" from the main page of that
dk600
help site http://beam.to/dk600. It's not an actual photo of my board.
The capacitor was soldered coupled with a resistance leg by leg.So the
circuit
is still uninterrupted, there's only the resistance now to provide the
conductive
bridge. 
I didn't remove the battery at first since i've yet to identify it looking
for replacement. Also i didn't notice the capacitor broke, so i did turn
the unit on experiencing that freeze after a couple minutes of play.

thanks, Davide 





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