[TechAssist] Re: TA Samsung TC2540S..R415 open..FBT replaced 1 month ago
- From: "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 30 Dec 2003 12:23:54 -0500
Most all of those Samsungs use a Time delay fuse
Phillip R Hull STET
phil245@xxxxxxxxxxxxx
FAX 517--569-3075
Professional Technicians only
----- Original Message -----
From: <support@xxxxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, December 30, 2003 12:13 PM
Subject: [TechAssist] TA Samsung TC2540S..R415 open..FBT replaced 1 month
ago
> This set is back again.,..
> This time the 1.2 amp fuse is open. Customer said it failed when she
pressed the power button. I found an
> intermittent trace from R415. Now set will stay on for a few minutes, then
the fuse opens.
> I suspect the FBT which I got from ASTI, but I would think the HOT would
go also.
> I have no schematic, but I checked every thing I could find in the HV
section..resistors, diodes, etc.,
> but can find no problems. I have tried to troubleshoot this thing, but I
keep going through fuses to
> quick.
> Should I order another FBT?
> Thank you.
>
>
>
> Jeff Dougherty
> Intrepid Video TV/VCR
> 263 S Front St
> Steelton PA 17113
> fax...717-564-4952
> www.intrepid-video.com www.tech-repair.net
>
> ----- Original Message -----
> From: <support@xxxxxxxxxxxxxxxxxx>
>
> I repaired this set exactly one month ago.
> Replaced the FBT with a generic from Acme Sales...(Don't say it). Also,
replaced the fuse, HOT and R415.
> Got a call today the set was dead again, just clicked on, then clicked off
when pressing power.
> Went over this evening to find R415 (.47/1w) open again and burnt. I
replaced it with a .39 ohm and the
> set worked. The color bands were burnt on this.
> The B+ goes through this resistor.
> I felt the resistor after running the set for a while and it didn't get
real hot.
> Question, could a faulty flyback cause this or a marginal reg?
> Is it possible the lower value I used may increase the longevity of this
component?
> Thank you.
>
>
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