[TechAssist] Re: Emerson TV 27" TC-2555DA - +B Question
- From: Al Gutz <alg@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 06 Feb 2004 23:02:20 -0500
Check the data sheet on a str30110, is designed as an adjustable voltage
regulator. No poor engineering or hocus pocus.
Al G
LeRoy Westlund wrote:
>
> It may be acceptable,....but,...it's "dam" POOR engineering,...in my
> opinion.
> They could have just used a 125 volt reg. IC. Orion done the same thing on a
> 25 inche TV,....and it won't last over 3 months,....NO MATTER what you do to
> fix it !!!!
>
> IMHO,
> LLW
>
> LeRoy Westlund
> Westlund TV & Electronics
> 97 North Main "At least I'll go down
> Centerfield, UT 84622-0087 swingin,......what a swingin
> Ph./Fax 435-528-3822 way to go."
> mailto:LLW@xxxxxxxxxx
>
> -----Original Message-----
> From: DON HARTIGAN <hartstv@xxxxxxxxxxx>
> To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
> Date: Wednesday, February 04, 2004 11:09 AM
> Subject: [TechAssist] Re: Emerson TV 27" TC-2555DA - +B Question
>
> >Your B+ for this set is OK, and is normal.In fact 125 to 130 is acceptable
> >for these Emerson's using this STR30110 regulator.
> >Don of HARTS-TVCR''ASC''
> >9 Robert St,Oromocto,NB,Can,E2V3N2
> >hartstv@xxxxxxxxxxx
> >Tel-5063579785,fax-3576010
> >cel-4701719
> >----- Original Message -----
> >From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Wednesday, February 04, 2004 1:42 PM
> >Subject: [TechAssist] Emerson TV 27" TC-2555DA - +B Question
> >
> >
> >> Unit came in dead, found shorted HOT, replaced with D1556, found open
> >> 4.7ohm/2watt resistor (R521) which feeds raw DC to regulator STR30110,
> >> found regulator (STR30110) outputting 155VDC, replaced it with original,
> >> TV fired up with no vertical deflection, replaced LA7838 with original
> >> (and a few caps just to be sure), now TV works fine except I'm a bit
> >> confused about the regulated voltage. This STR30110 is outputting 125VDC
> >> (exactly), one would think being an 110V regulator that that's would it
> >> would output. Is this the +B operating voltage for this TV? No +B trim
> >> pot here, just fixed resistors and a zener I think. Thanks in advance.
> >>
> >> David Lessard
> >> Alexandria Electronics
> >> Alexandria, Ontario
> >> K0C-1A0
> >> mr_fixit@xxxxxxxxxxxx
> >>
> >>
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