[TechAssist] Re: Hitachi PTV 50EX20B Chass AP52 Part ID
- From: "George" <grndmstrg@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 8 Dec 2003 23:05:51 -0800
R724 = PN 0114177, CF 4.7k 5% 1/4w
George
Afana Electronics
Moreno Valley, CA
----- Original Message -----
From: "Al Gutz" <alg@xxxxxxxxxxx>
To: "tech assist" <techassist@xxxxxxxxxxxxx>
Sent: Monday, December 08, 2003 7:45 PM
Subject: [TechAssist] Hitachi PTV 50EX20B Chass AP52 Part ID
>
> Looking for the value of R724, cooked beyond recognition.
>
> Loc. off return side of yoke plugs through L710 and L711 to R724 and
> L706 in parallel then connect to R723 to C730 to B+ at T703.
>
> I think I burnt this running it without the yokes connected. All power
> suypplies are good and I have a good wave on both vert IC and HOT base.
>
> Looked at hitachi site and found some block diagrams for this set but no
> SM. This set is susposed to be in SM for 50EX15K. These manuals are too
> big to try download on phone modem, you get 15 meg down after 2 hours
> and loose connection then you take the axe to the computer.
>
> Something strange happened this set as there is a peice of copper
> blasted off the board on the line feeding the speaker and the audio O/P
> IC is shorted. Dont think the B+ feeding the audio has the potential to
> blow off a 1/8" wide peice of trace.
>
> Any hepl much appreciated.
>
> Al G
> Al's TV-Electronics
> Pembroke Ont.
> Canada
>
>
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