Re: replacing the Protection Relay
- From: zzzz@xxxxxxxx (Barry Mann)
- Date: Tue, 29 Nov 2005 02:39:46 -0500
In <1133199911.528250.44450@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, on 11/28/05
at 09:45 AM, "monoloco" <monoloco@xxxxxxx> said:
>Hi, folks:
>First time here. While researching my problem on the web, I stumbled
>upon this group - specifically, a reply from Barry Mann that seems to
>be quite good.
[ ... ]
Somewhere there is another of my replies that gives an odd sort of
"repair" for your problem.
Connect the unit to speakers, tune to a highly compressed radio
station, (I usually use the local Rock station), turn the volume up
almost to the "destruct" point, and turn the unit off. Repeat about 30
times.
There is no need to dwell at that high volume, a fraction of a second
will suffice. The unit MUST be playing at that loud level at the
instant you remove the power.
---
On first glance everybody giggles and rolls their eyes at my "repair",
some claim that it will stress the unit, others try it and find that it
works most of the time. As the post you found indicates, the only
reliable long term repair is to replace the relay. My method above will
improve the situation, usually for many months or more, and the price
is right. Sometime in the future, the relay will become intermittent
again. Repeat the "repair" process. Obviously, if you must do this
every few weeks the relay must be replaced, or there is another
intermittent connection that responds to the high volume.
Sometimes it is possible to mechanically clean the relay contacts, but
it's a big hassle and the cleaning usually doesn't last long. Removing
the old relay can be very stressful for the unit, especially if the
surrounding wires are beginning to get stiff. Some of the relays are
buried under a PC board or two. Very few of the relays use a case that
can be opened easily -- you'll end up cracking the case.
I've been using this little trick for many years and have yet to damage
a unit or have anyone report that this technique has caused damage.
Yes, I can imagine that a very fail unit could fail, but an otherwise
healthy unit will tolerate this mild stress. The power switch is
stressed more than anything else. If you like, just pull the power cord
and don't use the power switch.
---
You can prove that the relay is the issue (and that my "repair" worked)
by playing a quiet, steady tone while listening through headphones.
Gently tap the relay with an insulated rod. If the relay needs
cleaning, you'll hear the sound cut out or briefly become distorted.
With a healthy relay you'll be able to smack the relay very hard,
almost to the point of breaking the case without an audible
consequence.
-----------------------------------------------------------
spam: uce@xxxxxxx
wordgame:123(abc):<14 9 20 5 2 9 18 4 at 22 15 9 3 5 14 5 20 dot 3 15
13> (Barry Mann)
[sorry about the puzzle, spammers are ruining my mailbox]
-----------------------------------------------------------
.
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- replacing the Protection Relay
- From: monoloco
- replacing the Protection Relay
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