RE: Re: CM12U

["UKHA" <mailinglists@xxxxxxxxxxx>]

Harry,

If this resister R25, bigger than the rest of them? I'm guessing it should
be if it's 1 watt...

If it is, there's only one of them on my CM11 board, R1 at the top/right
corner.
I'll have a "look" at it this weekend hopefully...

-----Original Message-----
From: Harry Hendriks [mailto:hja_hendriks@xxxxxxx]
Sent: 26 July 2004 11:07
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Re: CM12U


Hi,
I do not have a CM11 but a TW 523. May be the problem is similar?
My experience is that a resister fails (smells and went tot isolation)
and
so replaced it by one with a much higher heat capacity (=>5* the specs
value) .
See  for details of the print lay out (R25) at :
http://www.geocities.com/ido_bartana/modifying_power_line_interface.htm
Note: the indicated heat capaicty is 1watts for 22V installation, I now
use
5 watts!!
good luck and be careful,
harry hendriks


>From: "ianh1000" <ianh1000@xxxxxxx>
>Reply-To: ukha_d@xxxxxxx
>To: ukha_d@xxxxxxx
>Subject: [ukha_d] Re: CM12U
>Date: Mon, 26 Jul 2004 08:49:33 -0000
>
>Ahh, I think my one went pop the same way this weekend, not opened
>it yet but a quick sniff and it smells expensive.
>
>:-(
>
>
>--- In ukha_d@xxxxxxx, "UKHA" <mailinglists@v...>
wrote:
> > Yes, it seems to be the standard failure mode... join the club.
> > I'm on my second, after using the first very reliably for over
two
>years,
> > and then pop....
> >
> > I had mine apart too, but apart from the smell, I can't see
>anything that
> > looks dead, which is a shame as I'm sure the spare part would
cost
>nearer
> > 50p than ?50 for a new CM12.
> >
> > Lee
> >   -----Original Message-----
> >   From: James Mitchelmore [mailto:james@m...]
> >   Sent: 25 July 2004 23:02
> >   To: UKHA
> >   Subject: [ukha_d] CM12U
> >
> >
> >   I have a CM12U that I haven't used for a long while, although
it
>has
> >   been powered up for probably at least 6 months.  On attempting
>to fire
> >   it via a girder plugin today and having no luck, I decided to
> >   investigate further.  Upon opening the case, I was greeted by
the
> >   distinct smell of a failed component and a waxy deposit on the
>inside of
> >   the case, a capacitor I presume but can't see any that look
>particularly
> >   sick.
> >   Has anyone else had one of these fail like this? Is it a common
>fault?
> >   Don't particularly want to replace it with another one only for
>it to go
> >   the same way.
> >   Any suggestions?
> >
> >   Regards
> >
> >   James
> >
> >
> >   [Non-text portions of this message have been removed]
> >
> >
> >
> >
> >
> >
> >
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