[TechAssist] Re: Orion TV2520A: pulled in on sides
- From: "wilfred blakey" <wblakey@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 27 May 2002 10:55:25 -0400
Is there a heavy square 10 or 20-25 watt resistor in parallel with the STR
regulator IC? This is supposed to take part of the load and will give
symptoms such as you are mentioned.
Wilf Blakey/Blakey TV,Kirkland Lake,Ont
wblakey@xxxxxxxxxxxxxxxx
----- Original Message -----
From: "Barry Thompson" <barrystv@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: May 27, 2002 10:04 AM
Subject: [TechAssist] Re: Orion TV2520A: pulled in on sides
>
> Did you check all the caps on the B+ line?Open up the B+ and put a 100
watt
> light bulb to ground,maybe something is loaded it down.
> Barry Thompson
> Barrys TV
> barrystv@xxxxxxx
> Fax 613 723 9670
> 613 224 3406
> ----- Original Message -----
> From: <WJSTV@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, May 27, 2002 9:18 AM
> Subject: [TechAssist] Orion TV2520A: pulled in on sides
>
>
> >
> > We're using Orion service manual. TV came in dead. HOT was shorted, C446
> > (1@160v) in horizontal driver circuit was open, and R506 (180 ohm @ 20w)
> in
> > regulator was open. Then no vertical deflection. Changed vertical out
> ic401
> > (LA78041). Then had picture but no B+ regulation. STR30110 was shorted
and
> > R515 (1.5@3w) was open. Changed those parts, but raster is pulled in on
> > sides, with B+ of only 110v. Schematic shows output of regulator is
> supposed
> > to be 135v (even though it's an STR30110). Pin 5 of STR is 0, but should
> be
> > 6.9v. We used the light bulb technique to eliminate the horizontal
section
> > and regulated voltage didn't improve. Checked all resistors and caps in
> > regulator and tried another STR. Unfortunately, both STR's were
purchased
> > from same place and have same #'s.
> >
> > Bad batch of STR's? Any suggestions appreciated.
> >
> > Jeff Smith
> > Smith TV Service
> > 1930 Main St
> > Newberry, SC 29108
> > 803/276-4946
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