Digest for sci.electronics.repair@googlegroups.com - 3 updates in 3 topics

Cydrome Leader <presence@MUNGEpanix.com>: May 24 05:06AM

> SCSI (computer bus) systems; these were used in powering the required
> resistor arrays (called terminators), and were a big improvement over
> the previous generation (which used fuses).
 
Eek. I forgot about resistor packs and termination until you brought it
up. ESDI drives needed proper termination as well. That stuff was a pain.
dansabrservices@yahoo.com: May 23 04:00PM -0700

On Saturday, May 23, 2015 at 7:23:16 AM UTC-4, Mark Zacharias wrote:
> (IC501) is a VERY common troublemaker - although not often intermittent,
> usually just bad (at least by the time I see them).
 
> Mark Z.
 
I will second Mark's comment here. Many a Sony has been "fixed" by resoldering the uPC 2581. I usually remove the solder and resolder. Very common problem.
 
Dan
"Gareth Magennis" <sound.service@btconnect.com>: May 23 08:06PM +0100

"Michael A. Terrell" wrote in message
news:8uSdnZdaRdPOcMLInZ2dnUU7-aOdnZ2d@earthlink.com...
 
 
Gareth Magennis wrote:
 
> Are these things really just plug and play?
 
> Are these cheapo things often DOA or maladjusted/untested etc?
 
> Have I missed anything else?
 
 
Is the soldering iron's tip properly grounded? Our limit at Microdyne
was three ohms form the tip, to the bench's ground connection to the
electrical system.
 
 
 
 
 
 
I'll check that monday. I am starting to wonder if it's me that's killing
these things somehow.
 
None of them actually died though, they all just wouldn't work properly,
hence all this head scratching.
 
I'm using this.
http://uk.rs-online.com/web/p/product/5102022/?grossPrice=Y&cm_mmc=UK|Shopping-_-Google+PLA-_-Weller|Soldering+Stations-_-5102022&kpid=&kpid=5102022&istCompanyId=f7e7b05b-2daf-4c0e-8825-3633baf8113b&istItemId=xwiixixli&istBid=tzit&gclid=CJLPxLHG2MUCFUH4wgod9UAAfQ
 
 
 
Cheers,
 
 
Gareth.
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