[BC] Re: Providing schematics

[Gary Glaenzer]

but the BT stuff is NOT 'UL listed', because it uses a separate PS that is itself UL
listed


----- Original Message ----- 
From: "Mike McCarthy" <Towers at mre.com>
To: "Broadcasters' Mailing List" <broadcast at radiolists.net>
Sent: Friday, October 05, 2007 11:16 AM
Subject: Re: [BC] Re: Providing schematics


> In two words...product liability.  Anything which is UL listed is voided
> should the box be repaired by anyone by the certifying vendor.  That has
> HUGE liability implications to the general public.  Hence the reason why
> APC won't supply schematics or root software for programming their UPS's.
>
> Also, in the case of non-UL listed equipment, there is also the dynamic of
> modification or ill-advised repairs which further damages or creates
> unexpected operation and could either harm or hinder the functional
> operation of/by the user.  In this case, phone systems are really touchy.
>
> Proprietary design is a distant third when it comes to the two above
> liability issues.
>
> MM
>
> At 09:01 AM 10/5/2007 -0700, k7cr wrote
> >I loved reading this thread -
> >I suspect there are a number of reasons for folks not wanting to provide
> >schematics, the main one is the fear that someone will simply copy their
> >work and become a competitor.   I recall dealing with telephone system
> >vendors a while back, with a lot of cash on the table.  I told them all
> >that I had to have schematics
> >and they - ALL  - told me that this was a deal breaker.
> >
> >Another factor is that there are a whole lot fewer folks out there that -
> >can- repair equipment to the component level these days.
> >Or has the time to do so!
> >
> >Then there is the use of LSI that pretty much precludes bench repair.
> >
> >Some of this stuff is so cheap today that it's simply thrown away when it
> >breaks, because it's cheaper than spending the time to research the
> >problem, order parts, install and hope etc.
> >I hate to say it, but this has become normal. (The older you
> >are the harder this is to understand)
> >And Yes I remember Sams - I recall vividly the invitations to come over
> >for dinner...........and bring your tool box.  Come to think of it, those
> >U-Test-Um tube testers seem to be missing at the grocery stores.
> >
> >Clay Freinwald
> >
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