Digest for sci.electronics.repair@googlegroups.com - 6 updates in 1 topic

etpm@whidbey.com: Nov 06 09:21AM -0800

>with 1 second spaced stills setting, recording to SD, to suspend over
>the banch for when disassembling the next complicated mechanism, with no
>exploded views in a manual
That is a GREAT idea! I am now going to buy one. I do mostly
mechanical stuff and even though I try to document everything I take
apart I sometimes make a misteak. Thanks for posting your idea.
Eric
N_Cook <diverse@tcp.co.uk>: Nov 06 05:52PM

> mechanical stuff and even though I try to document everything I take
> apart I sometimes make a misteak. Thanks for posting your idea.
> Eric
 
I've always been in the habit of felt-tip marking the joins of plates ,
ith a straight line across the join, before taking apart. And small
boxes for sub-sections that go together. But even then I sometimes end
up with unplaced parts.
This dash-cam is Nikkai ER-130V. Make sure whatever you get comes with a
viewer that allows selecting single frames
etpm@whidbey.com: Nov 06 12:03PM -0800

>up with unplaced parts.
>This dash-cam is Nikkai ER-130V. Make sure whatever you get comes with a
>viewer that allows selecting single frames
I would have though that viewing single frames would be standard.
Thanks for the heads up. Lots of the stuff I take apart has to be
cleaned and this removes marks. Right now I try to take pictures but
it can be a hassle. But just being able to hold an assembly in focus
and not have to stop and take a picture would be great.
Eric
Cydrome Leader <presence@MUNGEpanix.com>: Nov 06 09:18PM

> https://dl.dropboxusercontent.com/u/29948706/KR-4070%20Caps.jpg
 
> In a Kenwood receiver. It is steel, not aluminum.
 
> What is its purpose ?
 
looks weird, like an afterthough.
 
Is there anything fastening the metal "shield" to the PCB below? Maybe
they had that board rattle apart of break loose with the large caps and
bridge rectifier attached to it. I'd almost expect the caps in something
of that age to be screwed down with a collar and have wire wrap terminals
or something weird like they did then.
 
There's quite a bit of stress on the parts in those big heavy receivers as
they get shipped across the world.
 
Heard from one guy that sent to the factory where they had audio gear
manufactured that the power transformers were all being screwed down
wrong, with the spring washer in the wrong place. He told the production
people that's not going to work, but they ignored that.
 
By the time the stuff made it to the US, every transformer busted free. It
all had to be reworked in the US. Whoops.
Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au>: Nov 07 08:19AM +1100

> https://dl.dropboxusercontent.com/u/29948706/KR-4070%20Caps.jpg
 
> In a Kenwood receiver. It is steel, not aluminum.
 
> What is its purpose ?
 
**Looks suspiciously like a DIY'er addition to me. The only time I've
ever seen covers on caps are ones on old mains suppression caps.
 
--
Trevor Wilson
www.rageaudio.com.au
 
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Chuck <chuck@mydeja.net>: Nov 06 04:01PM -0600

On Fri, 6 Nov 2015 10:43:40 -0500, "Tom Miller"
 
>I there a fan for forced air cooling? If so, maybe it is for directing
>cooling air?
 
>Just another guess.
 
 
No there wasn't. This receiver is from the late 70's and had a more
than adequate heat sink. Worked on quite a few of these back in the
day and I don't remember this piece of metal.
 
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