[TechAssist] Re: TA Samsung TC2540S..R415 open..FBT replaced 1 month ago
- From: "Technotronic Dimensions" <Steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 11 Dec 2003 12:20:06 -0500
Jeff:
Sounds like a 'transient' type failure. Probably the Generic Xfmr
does not ring precisely as original equipment, possibly because they use
cheaper material to construct, and may be more temperature sensitive than
OEM. So on a cold Morning you tend to see things like this happen. Your .39
ohm will likely go again if the same conditons are present and the set is
turned on in a cold condition...which is what I am guessing is what they
did. I would go higher in Value than .47 Ohms if it were me. Sounds like
this resistor is there just for protection against a condition like this. I
would say anything between 1-1.5 Ohms from 0.5 to 1W ought to work if you
dont have a 2W 0.47 ohm in your Tool box.
Steve Hearns
Technotronic Dimensions, NY (USA)
1-877-817-9885 (Voice / Fax US Only)
WWW.TECHNOTRONIC-DIMENSIONS.COM
----- Original Message -----
From: <support@xxxxxxxxxxxxxxxxxx>
To: "Techassist" <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, December 10, 2003 11:01 PM
Subject: [TechAssist] TA Samsung TC2540S..R415 open..FBT replaced 1 month
ago
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.
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
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