[TechAssist] Re: Sony HOT question
- From: busibees@xxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 17 Jun 2003 17:05:32 GMT
About the issue of "correctly" repaired,
I was informed by a Sony tech, that the sets circuit draw changes as the set
ages, causing "added heat to a poorly designed system".The original design
specs were very tight, leaving no room for change.
He said to add extra heatsink to the overheating components.
Overheating being too hot to touch. No higher than 150 F. using an infrared
reading.
HTH
Al Berntsen
La Mesa TV Supply Co.
7026 El Cajon Blvd.
San Diego, CA92115
619-469-4220, Fax619-463-9807 www.etparts.com
--- <hartstv@xxxxxxxxxxx> wrote:
Leonard,I have used both methods only when all other options were
explored.Fans & addon heatsinks did the job for me.I use small 5 volt
minfans which run very very quiet & draw very little current.Tks to Phil
Bader for this tip & the source for these & other fans.''HOSFELT''.I
remember a customer who came in with a Sony I had repaired some years
ago.Not related to the previous repair,he had broken off the ''rf'' cable
connector.When I removed the back there was my fan I had installed;still
running & quiet as day installed.It works for me BUT to each his own..my
.02...............
Don of HARTS-TVCR-ASC
9 Robert St,Oromocto,NB,Canada,E2V3N2
Tel-506-357-9785,Fax-506-357-6010
hartstv@xxxxxxxxxxx
----- Original Message -----
From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, June 17, 2003 11:11 AM
Subject: [TechAssist] Re: Sony HOT question
> Is this just an isolated incidence or do you routinely add heat sinks or
> fans? My question is really whether it is a reasonable procedure to add a
> fan to the HOT on Sony televisions routinely in order to keep them cooler.
> Will this enhance the reliability of the sets enough to justify the dosts?
> I think not, but wanted to check my reasoning. It seems to me that,
similar
> to the discussion we had on the RCAs running hot, that when you fix them
> right they should not run so hot that the HOT fails without some other
> problem causing it. I just don't change many HOTs that don't have
something
> else wrong.
>
> I am engaged in a discussion on the matter with a consumer who says he is
an
> electronics designer who feels that a fan is needed. I agree that there
> could be better heat sinking and a fan would not hurt, but I do not feel
> that it will enhance the reliability significantly. Anyone agree,
disagree?
>
> I anyone wants to respond off list I'll post a summary of opionions so we
> don't clog up the list with the matter.
>
> Leonard G. Caillouet
> Service Manager
> Electronics World
> Gainesville, FL
> 352-332-5608
> 352-332-5668 (fax)
>
>
> ----- Original Message -----
> From: "Gary McCartney" <gary@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, June 16, 2003 3:59 PM
> Subject: [TechAssist] Re: Sony HOT question
>
>
> > I had a Sony with HOT running hot so I added on a larger heatsink and
> > the temperature went down 10 deg. C.
> > Didn't add a fan because I don't like the sound it makes when it starts
> > to wear out. Note, this was done only after scoping the waveforms and
> > measuring voltages to confirm the best I could that there weren't any
> > defects left in the circuit.
> >
> >
> >
> >
> >
> > Gary McCartney
> >
> > McCartney Electronics
> > 7134 Fife Rd, RR 7
> > Guelph Ontario Canada N1H 6J4
> > Fax: (519)821-1530
> > email: gary (at) number63.ca
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > "Leonard G. Caillouet" wrote:
> > >
> > > Any opinions on the value of putting a fan on the HOT of Sony
> televisions to
> > > keep them cooler? I personally don't think it is necessary because I
> rarely
> > > find one that fails for no apparent reason. They do run rather warm
and
> the
> > > heat sinks could be larger, but it seems to me that if the set is
fixed
> > > properly there should be no need for a fan. I know some folks put a
fan
> on
> > > the 6301 PS regulators. What about the HOTs? Anyone doing this?
> > >
> > > Leonard G. Caillouet
> > > Service Manager
> > > Electronics World
> > > Gainesville, FL
> > > 352-332-5608
> > > 352-332-5668 (fax)
> > >
> > >
>
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> >
> >
> >
> > Gary McCartney
> >
> > McCartney Electronics
> > 7134 Fife Rd, RR 7
> > Guelph Ontario Canada N1H 6J4
> > Fax: (519)821-1530
> > email: gary (at) number63.ca
> >
> >
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