[TechAssist] Re: Sony TV KV27EXR25, STRS Running Hot
- From: "Tech Repair CD support" <support@xxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 27 Sep 2002 16:46:24 -0400
Bruce,
Also, check the 250v cap on CRT board.
I had the same unit, recently and this cap was real high in ESR.
I didn't notice any changes after replacing this cap...but makes for good
measure.
This is a great set. I own one and it has had some really weird problems that
seemed to clear up on their own.
For instance, there was a crackling coming from the yoke area, I believe and
darks
bands in the video. Before I got a change to pull it, everything cleared up.
I've been told there is no reason you can't use the IC with the suffix "A", but
I
haven't tried it yet.
Jeff
FAX 717-564-4952
Intrepid Video & Electronics
501 Luther Rd
Harrisburg PA 17111-2055
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----- Original Message -----
From: "Bruce Youmans" <youmans@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, September 27, 2002 8:03 AM
Subject: [TechAssist] Re: Sony TV KV27EXR25, STRS Running Hot
Thanks Jeff for you comment.
I have tested all capacitors and resolder connections on the power supply
board. I will change a few capacitors to be on the safe side. It was my
thought also that these just do run rediculously warm. The picture seems to
look good, even after running one-half hour. I will run it longer later
today and if nothing fails send it out.
Bruce
Bruce's TV Service
Sierra Vista, Arizona
----- Original Message -----
From: Shoreline Electronics <jstielau@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, September 26, 2002 6:32 PM
Subject: [TechAssist] Re: Sony TV KV27EXR25, STRS Running Hot
>
> These run ridiculously hot normally.......Just make sure you use plenty of
> heatsink grease & resolder the power supply circuit really well....you
will
> see many ring cracks on these. Replacing all the small caps is a good
idea
> also.
>
> Jeff Stielau
> Shoreline Electronics Repair
> 125 Beech Tree Lane
> Westbrook, CT 06498
> 860-399-1861
> 860-664-3535 (fax)
> jstielau@xxxxxxxx
> ----- Original Message -----
> From: "Bruce Youmans" <youmans@xxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, September 26, 2002 10:28 AM
> Subject: [TechAssist] Sony TV KV27EXR25, STRS Running Hot
>
>
> > Manufacturer: Sony
> > Model: KV-27EXR25
> > Chassis: SCC-D50F-A
> > Problem: STRS 6031 Runs very hot.
> >
> > This set originally was dead. Found numerous bad solder connections on
> power supply supply board. Repairing these did not fix the problem. Found
> STRS-6031 voltage regulator bad. Replaced with an OEM "A" version. Set
runs
> fine. Regulator output voltage is normal at 158 volts and regulates well.
> The concern is that after 20 minutes of running the regulator and heat
sink
> is very hot. Almost too hot to touch. Is this normal? I have ESR'd all
> supply capacitors, all load voltages seem fine and regulator input ontput
> ripple is within specification.
> >
> > Any thoughts appreciated.
> >
> > Bruce
> > Bruce's TV Service
> > Sierra Vista, Arizona
> > Youmans@xxxxxxxx
> >
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