[TechAssist] Re: Orion TV2520A: pulled in on sides
- From: "Barry Thompson" <barrystv@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 27 May 2002 10:04:05 -0400
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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