[TechAssist] Re: Samsung 52" PCH521R - Blows 3A fuse
- From: "Corey Brazell" <cohbraz@xxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 30 Apr 2004 08:23:03 -0400
Looks like the fuse for the 13v supplies should be F856.
The fuse you are talking about, F855, is for the -26v line to the
convergence outputs. F854A is the fuse for the 26v line. Either of these
two fuses being blown would cause loss of deflection; the 26v lines are
only used for convergence.
Check the yokes, and be sure to measure the value of the 4.7ohm yoke return
resistors RZ086, 87, 88, 89 in the Green circuit. In the Red and Blue they
should be 3.9 ohms and the red circuit is labeled RZ076, 077, 078, 079, and
079A. The Blue starts with RZ096, etc. Note that the Red and Blue have one
extra resistor.
And you probably have at least one bad STK. I would change all three.
Corey Brazell
Audio Video Electronics
12169 SC Hwy 121
Newberry SC 29108
> [Original Message]
> From: Dan Garris <dgarris@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Date: 4/29/2004 10:32:35 PM
> Subject: [TechAssist] Samsung 52" PCH521R - Blows 3A fuse
>
> Hi All,
>
> Samsung 52" PTV model PCH521R
>
> Set has bad bow at both top & bottom, Convergence menu comes up but is
way
> off and not adjustable. Found open (F855A) 3A fuse On +13v And -13v
Supply
> Lines In Power Supply. I have no print on this Set.
>
> What would cause the 3A fuse to open? Are all (3) of the STK390-020
> Convergence IC's bad?
>
> Dan Garris
> Garris TV
> New Bern, NC
> DGarris@xxxxxxxxxxx
>
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