[TechAssist] Re: Magnavox 25C5, sync
- From: "al m" <ampm@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 19 May 2005 11:42:24 -0400
What's the #'s on the part?
Al Marquardt
ampm@xxxxxxx
Al Marquardt Electronic Repair
206 W Main
Girardville Pa. 17935
----- Original Message -----
From: "Hoyt's TV" <hoytstv@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, May 19, 2005 10:32 AM
Subject: [TechAssist] Magnavox 25C5, sync
> Loss of sync.
>
> Customer says she saw a bright light coming from the back of the set and
> shut it off.
> When I tried it, it came on ok but horizontal was off freq. I cannot find
> any burn marks or burned parts and yoke appeared to be working properly.
> I pulled the chassis and have it running on the bench. Looks the same as
> in
> the house, adjusted H so it floats but has no sync. The pulse from the HO
> transformer is ok from the coil but develops ringing after going through
> two
> resistors to pin 12 of the sync chip. Resistors measure ok and there is
> nothing on the line to filter the ringing. Of course I don't have a chip
> on
> the shelf.
>
> Anyone have any notes on this one? The only mention of this in the Tips
> section, mentions parts in the yoke return circuit. Everything there seems
> OK.
>
> Russ Hoyt
> Hoyt's TV
> Exeter, NH
>
>
>
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