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<DIV><FONT size=2>D8 looks like and probably is a diode. doesn't it say on
the schematic what kind it is? if you're lucky, it's just something like an
1n4148, which costs a few cents. </FONT></DIV>
<DIV><FONT size=2>the question is: what made it burn? </FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>first the cr, now this: you don't seem to have much luck with
ebay purcheases.. or do you buy them cheap and broken to fix them up
yourself?</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>r./</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=chadcoffman@comcast.net href="mailto:chadcoffman@comcast.net">Chad
Coffman</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=synth-diy@dropmix.xs4all.nl
href="mailto:synth-diy@dropmix.xs4all.nl">diy synth</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, June 07, 2005 10:23
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [sdiy] burned, soda-soaked
SH-101 (with pics)</DIV>
<DIV><BR></DIV>
<DIV>
<DIV><FONT face=Arial size=2>Excellent. Thanks for the response. Do I need to
remove the ICs or anything? I imagine the socketed components should go, but
what about those soldered to the PCB? </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Also, what do you make of the burn? </FONT><FONT
face=Arial size=2>It is labeled D8 on the schematics here:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><A
href="http://www.physicsenterprises.andrews.edu/diy_archive/manuals/roland/sh101/sh101_7.gif">http://www.physicsenterprises.andrews.edu/diy_archive/manuals/roland/sh101/sh101_7.gif</A></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><A
href="http://www.physicsenterprises.andrews.edu/diy_archive/manuals/roland/sh101/sh101_6.gif">http://www.physicsenterprises.andrews.edu/diy_archive/manuals/roland/sh101/sh101_6.gif</A></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>(lower left, both)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Again, many thanks,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Chad</FONT></DIV></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=sexsymbol@execpc.com href="mailto:sexsymbol@execpc.com">Tim
Curtis</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=chadcoffman@comcast.net
href="mailto:chadcoffman@comcast.net">Chad Coffman</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, June 07, 2005 1:01
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [sdiy] burned, soda-soaked
SH-101 (with pics)</DIV>
<DIV><BR></DIV>If it's soda, then the best way to clean the PCBs is to
totally remove them from the synth and run them under water. Distilled
water is best, but generally tap water works just fine. You can just
run them under the faucet, or use the shower in the case of larger
PCBs. You may want to follow this with a rinse of distilled
water.<BR><BR>After this, follow up with compressed air to dry it if
possible. You particularly don't want the water to stay in the pots
and switches. <BR><BR>Alcohol won't work too well with water based spills
like soda or beer.<BR><BR>Tim<BR><BR><BR>Chad Coffman wrote:
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<DIV><FONT face=Arial size=2>I just received an SH-101 purchased over
eBay, which was advertised as "not working". The problem, according to the
seller, is that it simply does not power up. This was confirmed upon
unpacking and plugging the unit in. </FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>So I take the unit apart. Look over
everything. The first ominous sign is that the PCBs are soaked in soda
(well, perhaps not soda, but something that was once a liquid but is
now a sticky, brownish semi-solid). The second ominous sign is a burn near
one of the most soda-soaked areas. Pics here:</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Front (80k) :</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2><A
href="http://home.comcast.net/%7Echadcoffman/sh101burn1.JPG">http://home.comcast.net/~chadcoffman/sh101burn1.JPG</A></FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Back (70k) :</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2><A
href="http://home.comcast.net/%7Echadcoffman/sh101burn2.jpg">http://home.comcast.net/~chadcoffman/sh101burn2.jpg</A></FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>There are a few other curious-looking
anomolies which could be causing problems, but these two issues
appear to be most worthy of my immediate attention. </FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>T</FONT><FONT face=Arial
size=2>wo questions:</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>1: What is the easiest way to clean these
PCBs? I tried isopropyl rubbing alcohol and q-tips, but this was proving
to be a tireless endeavor. It would take about 20 hours at the
rate I was going. </FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>2: What is that burnt part and where do I
find a replacement?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>As always, many thanks in
advance,</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Chad</FONT></DIV><PRE wrap=""><HR width="90%" SIZE=4>
No virus found in this incoming message.
Checked by AVG Anti-Virus.
Version: 7.0.323 / Virus Database: 267.6.4 - Release Date: 06/06/05
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<HR>
<P></P>No virus found in this outgoing message.<BR>Checked by AVG
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