Digest for sci.electronics.repair@googlegroups.com - 12 updates in 2 topics

amdx <nojunk@knology.net>: Dec 05 01:07PM -0600

On 12/5/2015 6:52 AM, Mark Zacharias wrote:
> saturation.
 
> Felt really good about that one.
 
> Mark Z.
 
I had an SX-828, bought it sometime in the early 70s.
Been so many years, I don't recall the problem, but
I tossed it about two years ago, just too much stuff.
 
Mikek
"Mark Zacharias" <mark_zacharias@sbcglobal.net>: Dec 05 02:34PM -0600

Here's one.
 
Onkyo cassette deck, circa 1986. Perhaps a TA-630 or some such.
 
Played just fine in PLAY mode.
 
In REC mode only, the auto-stop would trigger at random times.
 
Partially open bridge rectifier. One of those little black round ones. In
PLAY mode the voltages held up, but in REC mode the additional load of the
bias oscillator dropped the voltage enough to cause the problem.
 
Ripple waveform was definitive. Showed 1/2 wave pattern where it should have
been full-wave.
 
 
Mark Z.
Chuck <ch@dejanews.net>: Dec 05 03:22PM -0600

On Sat, 5 Dec 2015 14:34:50 -0600, "Mark Zacharias"
 
>Ripple waveform was definitive. Showed 1/2 wave pattern where it should have
>been full-wave.
 
>Mark Z.
 
 
These bridge rectifiers also caused weird problems in Onkyo receivers
of the 1980s.
 
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mogulah@hotmail.com: Dec 05 01:30PM -0800

On Saturday, December 5, 2015 at 2:44:26 PM UTC-5, Jon Elson wrote in rec.crafts.metalworking:
> I replaced it with a solid state relay, and all has been good for several
> years. I gues the cold water valve gets cycled the most often, so that
> relay got burned up first. No problem yet with any of the others.
 
Yeah, obviously a current relay or just that kind of an interface or something. Tell 'em about it, so they can buy you a whole new one.
 
You can't get anything if you stay silent. (I learned that the hard way)
Chuck <ch@dejanews.net>: Dec 05 03:30PM -0600


For a very short time in the 1980s, Kenwood manufactured amplifiers
with wrong value resistors at various locations. The first one was a
bear because I had never seen a Japanese company make that kind of
mistake.
 
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Chuck <ch@dejanews.net>: Dec 05 03:37PM -0600

>A year later the tech that took my place said he came in a couple days
>a week to repair the few that came in. I repaired a little over 11,000
>vcr's in ten years, it was a good time.
 
 
In a similar vein to your remote story, we sold an $1800 Tandberg
cassette deck that came to the shop over and over again for not
responding to the transport keys. In the shop it always worked
perfectly. I decided to go to the customer's house after work to see
what the problem was. At his house, the keys didn't work. I spotted
a light dimmer on the wall. Turning it off and the deck worked
perfectly.
 
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Jeff Liebermann <jeffl@cruzio.com>: Dec 05 01:51PM -0800

On Thu, 3 Dec 2015 06:34:55 -0600, "Mark Zacharias"
 
>Any more recent successs stories to brag about?
>C'mon, don't we all enjoy patting ourselves on the back, really?
>Mark Z.
 
I haven't bothered to write anything new, but in 1994, I scribbled
this list for Wired Magazine, which never bothered to print it or pay
me:
<http://members.cruzio.com/~jeffl/nooze/support.txt>
I'm not sure I could call these success stories, but since I got paid
for most of the repairs, I guess it qualifies as successful.
 
 
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
M Philbrook <jamie_ka1lpa@charter.net>: Dec 05 07:14PM -0500

In article <1449310629.173856@news.evonet.be>, c4urs11@domain.hidden
says...
> I worked my way to the control panel and engaged the start.
> Within seconds the crowd silenced and fled the scene: the line was up.
 
> We were never again called in.
 
And what was the charge for that?
 
$1 for resetting the switch and $9,999.00 for knowing which one?
 
Jamie
M Philbrook <jamie_ka1lpa@charter.net>: Dec 05 07:24PM -0500

In article <nsl66bdu96kpnnu4lapfpgmoor5h862hs6@4ax.com>, ch@dejanews.net
says...
 
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
 
While I was in a neighborhood visiting a nice looking girl, a friend of
hers ask if I could go over to their place and see why their portable
color TV near the door had messed up colors they could not remove.
 
I really didn't want to go and told them it would be a minimum of $20
bucks just to walk in, they accepted.
 
So I walked in and didn't even bother to turn the TV on. I reached up
on top of the TV set and removed the 9x6 Triaxal Speaker with a large
magnet on it, sitting there for what ever reason, I have no idea why.
 
I held my hand out for the money! They asked aren't you going to even
turn it on? I said, you can do that, they did and could not believe what
they saw. I took the money and said, have a good day now..
 
Jamie
Phil Allison <pallison49@gmail.com>: Dec 05 06:52PM -0800

Chuck wrote:
 
> what the problem was. At his house, the keys didn't work. I spotted
> a light dimmer on the wall. Turning it off and the deck worked
> perfectly.
 
 
** Need more explanation for that one.
 
 
.... Phil
Bruce Esquibel <bje@ripco.com>: Dec 06 12:03PM


> I had an SX-828, bought it sometime in the early 70s.
> Been so many years, I don't recall the problem, but
> I tossed it about two years ago, just too much stuff.
 
Heh, anyone else reading this, before you toss it, check ebay for the
completed listings on both working and non-working audio stuff from the
70's and 80's, it's nuts.
 
Even if that 828 was broke, it seems to fetch $100-$150 and the working ones
$200 on up.
 
Some of the top of the line ones from back then (pio sx-1980, sansui 5500 i
think) in the thousands. This isn't the old tube stuff like Fisher and
Marantz, just the popular solid state crap from the 70's and 80's.
 
The power amps and speakers don't follow but anything with receivers and
turntables from that period, you probably can make back what you paid for it
new, and then some.
 
-bruce
bje@ripco.com
seanmtweedie@gmail.com: Dec 05 09:59PM -0800

So recently I got a Sony STR - av 570 and I fix the problem where the surround LED light blinks and it starts making a clicking sound but now I am having a problem with the DBFB dynamic bass surround. When I press it the right speaker starts to do pops and crackles and is not due to my speakers. If anyone give me advice about how to fix this problem it would be very helpful to me.
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