[TechAssist] Re: Cooling fan note.
- From: "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 9 Apr 2003 11:04:34 -0400
There are no CTC187 bulletin to replace a fan in a ctc187 chassis in the
part finder bulletins. I find doing this as ridicules
Phillip R Hull STET
phil245@xxxxxxxxxxxxx
FAX 517--569-3075
----- Original Message -----
From: "Electric Medic" <info@xxxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, April 09, 2003 12:18 AM
Subject: [TechAssist] Re: Cooling fan note.
>
> OK. I read my TCE inbox before I read my Sony inbox. I see Hugh was
replying
> to a Sony post about installing a cooling fan in a Sony regulator circuit.
I
> also see that others have installed these fans. Is there a actual TCE
> service bulletin with part numbers for a fan and a procedure for doing
this
> job. Where have I been? I have never heard of this. I still would not do
it
> under any circumstance. If I get one that I can not fix the regular way, I
> will write the set off, just like we have to do on some lightning sets. It
> is just one job, we do not fix 100% of our repairs anyway. It just sounds
to
> risky if another shop goes behind us. I would love to know how many shops
> are installing these fans and what the service bulletin number is. I want
to
> see that.
>
> Perry Bower
> Electric Medic
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Al Gutz
> Sent: Tuesday, April 08, 2003 10:54 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Sony EXR question on STRS6301 cooling
>
>
>
> Just done one of those a couple of weeks ago. Used a 12V ball bearing
> fan
> (for longer fan life) off a 486 processor. Couldn't find a 12V source on
> the power board so I mounted a 7812 IC on the fan and connected to the
> 18V supply. Fan keeps the regulator cool. Mounted the fan on the plastic
> frame above the STR heat sink blowing down and mounted the heatsink from
> the fan assy. on the front side of the STR. The problem with the
> original setup is the fins on the heatsink are horz so you don't get a
> natural airflow that you get fron vert fins. This mod droped the STR
> temp from 62 deg C to around 40 C.
> You can hear the fan when audio is shut down but not noticable when
> sound is turned up.
>
> Al G
> Al's TV-Electronics
> Pembroke Ont.
> Canada
>
> Peter oliver wrote:
> >
> > Have sony 27EXR... set with the STRS6301 blown, replaced now runs but
hot
> as
> > they allways do. I rember reading About a mod for some of the RCA CTC187
> > series set HOT's by wiring a 12V computer fan to blow across the Heat
> sink.
> > Has anyone Ever tried this on a sony EXR series set so the fan blew
across
> > the STRS6301 heat sink??? If so what is the best location to tap the 12V
> > off? The computer fans are around 0.14 A or so....
> >
> > Peter Oliver
> > Tucson Radio TV
> >
> > _________________________________________________________________
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