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From: hr(bob) hofmann on 18 Jan 2010 23:33
On Jan 18, 8:29 pm, "Arfa Daily" <arfa.da...(a)ntlworld.com> wrote:
> <t...(a)mucks.net> wrote in message
>
> news:u219l5tb0haulmrmdoujg1m8s9gnktig0o(a)4ax.com...
>
>
>
> >>>And you think you can fix it?
>
> >>Trying to fix something is better than slingin insults, which isn't all
> >>that
> >>productive, yeah?
>
> > Ignore their insults. You may be able to fix it. It could be a
> > learning experience, good or bad. You'll never know until you
> > try.
>
> > Some seem to forget how they gained their knowledge in the first
> > place, and now that they have that knowledge they discourage
> > others from taking the same path they did.
>
> That's not really the case. I, for one, actively encourage people to 'have a
> go' with help from those of us who *do* have the knowledge, but by the same
> token, we have to be realistic in evaluating the poster's current level of
> expertise, to see if what they have is appropriate for the type of repair
> they are trying to undertake. TV sets are potentially *very* dangerous, and
> it would be irresponsible of us to actively encourage someone who we felt
> might endanger themselves (or others) by 'having a go'. It's called "making
> a judgement call", and I have not seen any comments in this thread that are
> anything much more than that. For sure, some replies are couched in less
> than 'gentle' terms, but with usenet newsgroups, that's pretty much the
> nature of the beast ...
>
> Arfa

I hope the OP is in the USA, where he will onlu have to worry about
165-175 volts from the power supply compared to double that in the UK
and points east. I also encourage people to try, but share your
concern that the OP seems vary naive and possibly likely capable of
executing himself. The OP should go to the
sci.electronics.repair.faq and read it through before going any
further.
From: Mark Zacharias on 19 Jan 2010 07:20
"Arfa Daily" <arfa.daily(a)ntlworld.com> wrote in message
news:geP4n.22572$gm2.5629(a)newsfe18.ams2...
>
> "Alex Thomm" <Alex_member(a)newsguy.com> wrote in message
> news:hj0db501ful(a)drn.newsguy.com...
>> In article
>> <0c17c052-0415-4881-ad77-17dd4b7c095f(a)j19g2000yqk.googlegroups.com>,
>> captainvideo462002(a)yahoo.com says...
>>>
>>>On Jan 17, 2:47=A0pm, AZ Nomad <aznoma...(a)PremoveOBthisOX.COM> wrote:
>>>> On 17 Jan 2010 11:13:10 -0800, Alex Thomm <Alex_mem...(a)newsguy.com>
>>>> wrote=
>>>:
>>>>
>>>>
>>>>
>>>> >In article <slrnhl6mji.bki.aznoma...(a)ip70-176-155-130.ph.ph.cox.net>,
>>>> >AZ=
>>> Nomad
>>>> >says...
>>>>
>>>> >>On 17 Jan 2010 10:24:53 -0800, Alex Thomm <Alex_mem...(a)newsguy.com>
>>>> >>wro=
>>>te:
>>>> >>>In article
>>>> >>><slrnhl6jcf.8f6.aznoma...(a)ip70-176-155-130.ph.ph.cox.net>, =
>>>AZ Nomad
>>>> >>>says...
>>>>
>>>> >>>>On 17 Jan 2010 09:34:29 -0800, Alex Thomm <Alex_mem...(a)newsguy.com>
>>>> >>>>w=
>>>rote:
>>>> >>>>>In article <hivhja02...(a)drn.newsguy.com>, Alex Thomm says...
>>>>
>>>> >>>>>>I have a Philips TV model 32MF505W/17 =A0
>>>>
>>>> >>>>>Actually, it's a 32MF605W/17
>>>>
>>>> >>>>Are the sound line outputs also dead? =A0If not, you can run them
>>>> >>>>to =
>>>a
>>>> >>>>pair of amplified speakers.
>>>>
>>>> >>>I'm not knowlegable enough to know if the line outputs are dead or
>>>> >>>not=
>>>. =A0Is
>>>> >>>there an easy way to find this out?
>>>>
>>>> >>Connect a pair of computer speakers, or run them to an aux input on a
>>>> >>stereo.
>>>> >My computer speakers have a different connection. =A0I don't have a
>>>> >ster=
>>>eo on hand
>>>> >with an aux input. =A0Thanks for the suggestions. =A0I'll see what I
>>>> >can=
>>> dig up to
>>>> >test this out.
>>>>
>>>> Getting a rca to stereo miniplug adapter is trivial. =A0Any target,
>>>> walmart, radio shack will have them. =A0Even a well stocked truck stop
>>>> will have one.
>>>
>>>With all due respect, and I mean this in the most gentle way, if you
>>>don't know how to verify if you have a line output, how do you think
>>>you're going to troubleshoot an electronic circuit?
>>
>> With patience. I was a bit dense at first but I understand now. Thanks
>> to all
>> for the help.
>>
>
> If something went pop, and magic smoke was released, there's a good chance
> that you will find that the side has blown out of the audio output IC. To
> an experienced engineer with appropriate desoldering equipment, and the
> skills to use it, replacement of such an IC is a trivial task. However, if
> you don't have those skills and equipment, which your post would suggest
> you don't, you will struggle to remove the old IC from the PCB, without
> doing damage to the tracking.
>
> Unless you feel confident to do this, then I would go along with what
> others have said, and try running the audio line outs through an external
> amplifier, or take the TV to a reputable repair shop. If you do decide to
> pursue finding the problem, *please* be VERY careful . TV sets use
> switchmode power supplies, and these are VERY dangerous - actually
> potentially lethal ... :-(
>
> Arfa
>


Often a non-technical person comes onto the newsgroups wanting to know �what
always goes wrong� simply because they are too cheap to pay to have
something fixed. Additionally, they believe they can gain whatever
information or expertise they might need from the Internet, at no cost or
below even the most modest market value of the repair. This is sometimes
true (unfortunately), but the fact is that most of these people have no
business working on electronic equipment AT ALL. These people have no
respect for our profession, viewing it (and us) as a commodity they can
essentially pick up at Wal-Mart for pennies on the dollar, or even for
nothing at all.

I'm not opposed to helping newbies, if they have some hint of technical
ability, but a television is a bad place to start learning.



Mark Z.

From: Sansui Samari on 20 Jan 2010 03:52
On Jan 17, 9:32 am, Alex Thomm <Alex_mem...(a)newsguy.com> wrote:
> I have a Philips TV model 32MF505W/17 that has no sound.  Something popped and
> smoked and when the sound stopped.  The picture is still fine.  I've taken off
> the back and took off the center metal cover.  Everything looks fine there.
> There is another metal cover that I cannot take off without being a little
> inventive.  Under that cover I suspect will be the amplifier board?  There
> should be something visibly burned there but I can't see it with the cover in
> place.
>
> If that circuit board is fried, is it possible for me to buy a new one and
> install it myself?

I have to agree that this may not be the best place to start learning
electronics. With HC/HV (high current/high voltage), you rarely if
ever get a second chance. Not to mentions, that just acquiring the
tools to do the job correctly can easily cost more than a repair. At
least have a friend that knows electronics help you. If you make the
currently wise decision to take it to a shop, they may let you hang
around and watch them troubleshoot it and fix it. I understand that
taking things into a shop to have them fixed, may not be economically
viable for everyone, but a television is not worth dieing for.
From: captainvideo462002 on 20 Jan 2010 08:48
On Jan 20, 3:52 am, Sansui Samari <jimjam1...(a)gmail.com> wrote:
> On Jan 17, 9:32 am, Alex Thomm <Alex_mem...(a)newsguy.com> wrote:
>
> > I have a Philips TV model 32MF505W/17 that has no sound.  Something popped and
> > smoked and when the sound stopped.  The picture is still fine.  I've taken off
> > the back and took off the center metal cover.  Everything looks fine there.
> > There is another metal cover that I cannot take off without being a little
> > inventive.  Under that cover I suspect will be the amplifier board?  There
> > should be something visibly burned there but I can't see it with the cover in
> > place.
>
> > If that circuit board is fried, is it possible for me to buy a new one and
> > install it myself?
>
> I have to agree that this may not be the best place to start learning
> electronics.  With HC/HV (high current/high voltage), you rarely if
> ever get a second chance.  Not to mentions, that just acquiring the
> tools to do the job correctly can easily cost more than a repair.  At
> least have a friend that knows electronics help you.  If you make the
> currently wise decision to take it to a shop, they may let you hang
> around and watch them troubleshoot it and fix it.  I understand that
> taking things into a shop to have them fixed, may not be economically
> viable for everyone, but a television is not worth dieing for.

Mark, I have to say that you definitly put it like it is. I can't tell
you how many people have told me over the years something like, "my TV
won't come on and the little power button in the front needs to be
replaced". Or they want to buy a resistor to replace the one that has
completely illegibly incinerated. I will talk them out of the repair,
however I have friends in the trade that will sell them the fuse and
resistor because they know as sure as there will be another sunset
that as soon as the next smoke test is over, he'll never hear from the
fool again. ..Lenny.
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