[TechAssist] Re: Samsung TV - TXE2749 - KCT52A - EPROM Question (FIXED)
- From: "J. Knoll" <jaystv@xxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 4 Apr 2005 19:48:41 -0400
Jonas,
Did your esr meter fail? What kind of esr meter do you use? I have
found testing the value of an electrolytic is less important than
testing for esr. I have an old analog esr meter made by a company that
has been out of business now for years, Creative Electronics out of
Michigan. If I had known they were going to close down I would have
bought another from them. They were very well made units. I have seen
some of the newer ones and am not impressed with the quality.
--
Jay Knoll TechAssist Monitor
TechAssist
225 Monticello Ave.
Clarksburg WV, 26301
www.tech-assist.org www.techassist.net
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On Apr 4, 2005 7:35 PM, jonas miglinas <miglinasj@xxxxxxxxxxx> wrote:
> Hello David,
>
> I read again your original thread, and saw that Eric Manuel suggested to
> replace C816 1000uf/25v (thanks Eric). I replaced it and VOILA, set fired
> up. I had esr'd it originally and it was ok, the value was at 945 and I
> thought it was close enough. So I dusted off my Sprague Tel-Ohmike and
> checked it under a load, and sure enough, it craps out at about 10.5v. I
> replaced all the original ic's back into the set and has been running as it
> should for three hours now.
> I saw that you had changed that cap also, may want to check it again. If
> still no 12v, unsolder pin 1 of IC 853 and see if the 12v comes up. I found
> originally a 100uf/16v(that is tied inton this IC) down to about 40uf (damn,
> I don't remember the location #, but it's in front of IC 853). Let me know
> if you need the location #.
>
> Jonas Miglinas
> Miglinas TV
> Chicago
> ----- Original Message -----
> From: "jonas miglinas" <miglinasj@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Sunday, April 03, 2005 3:10 PM
> Subject: [TechAssist] Re: Samsung TV - TXE2749 - KCT52A - EPROM Question
>
> > Hello David,
> >
> > I am experiencing the exact same problem. No start because the 12v and 5v
> > supplies are missing. Have changed IC 852 and HC 802?(not at the office
> and
> > not sure of the numbers). When I take out either one of these the 12v
> comes
> > back. Decided to check the micro, and saw the VDD at .6v at standby.
> > Unsoldered, and the 5v came up. I have a spare chassis I saved that came
> > with a brocken crt and board, and swapped out the the micro. Set came on
> at
> > once and I thought I had it. I turned the set off and on about 5-6 times,
> > unplugged it, yep you guessed it, same thing.
> > Worked on this set about three hours saturday without a schematic and
> > decided to search the Tech Assist archives when I ran across your thread.
> I
> > have to exchange a couple of Thomson HD sets tomorrow(crt's not available)
> > so I won't be able to attack this set till Tuesday.
> > Of course I'll let you know what I find.
> > Client doesn't want to spend more than $100 so I won't spend too much more
> > time, unless this gets my goat.
> > Maybe there is somethig in Winstips for this model, or these models which
> > should be close:
> > TXE2545
> > TXE2546
> > TXE2549
> > TXE2745
> > TXE2746
> >
> > Jonas Miglinas
> > Miglinas TV
> > Chicago
> >
> > ----- Original Message -----
> > From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Sunday, April 03, 2005 11:28 AM
> > Subject: [TechAssist] Re: Samsung TV - TXE2749 - KCT52A - EPROM Question
> >
> >
> > > Jonas,
> > >
> > > Are you experiencing the same problem I am with this TV? Please let me
> > > know, perhaps between the two of us we can figure this out!
> > >
> > > David Lessard
> > > Mr_fixit@xxxxxxxxxxxx
> > > Alexandria, Ontario, Canada
> > >
> > > -----Original Message-----
> > > From: techassist-bounce@xxxxxxxxxxxxx
> > > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Eric Manuel
> > > Sent: Sunday, April 03, 2005 9:39 AM
> > > To: techassist@xxxxxxxxxxxxx
> > > Subject: [TechAssist] Re: Samsung TV - TXE2749 - KCT52A - EPROM Question
> > >
> > > Hi Jonas put an eeprom from a rca set then plug the tv in leave it for 3
> > >
> > > or 4 minutes to give the micro time to write the eeprom.Works for
> > > me..Eric
> > >
> > >
> > > Eric
> > > E M Electronics
> > > Deer Lake Nfld
> > > Canada
> > > tvman@xxxxxxxxxxxxxxx
> > >
> > > jonas miglinas wrote:
> > > > Hello David,
> > > >
> > > > Did the eeprom switch work? I just came across the same model as yours
> > > and
> > > > was wondering if you gave up on it?
> > > >
> > > > Jonas Miglinas
> > > > Miglinas TV
> > > > Chicago
> > > > ----- Original Message -----
> > > > From: "Eric Manuel" <tvman@xxxxxxxxxxxxxxx>
> > > > To: <techassist@xxxxxxxxxxxxx>
> > > > Sent: Tuesday, March 29, 2005 7:42 AM
> > > > Subject: [TechAssist] Re: Samsung TV - TXE2749 - KCT52A - EPROM
> > > Question
> > > >
> > > >
> > > >
> > > >>Hi David you can put in an Eeprom from a rca tv and it should work as
> > > >>long as the micro is ok.All the samsung eeprom I
> > > >>seen was blank as the settings are stored in the micro
> > > >>
> > > >>
> > > >> Eric
> > > >>E M Electronics
> > > >>Deer Lake Nfld
> > > >>Canada
> > > >>tvman@xxxxxxxxxxxxxxx
> > > >>
> > > >>David wrote:
> > > >>
> > > >>>What are the symptoms of a defective EEPROM on this chassis? No
> > > startup?
> > > >>>With the EPROM removed should I see mirco data activity?
> > > >>>
> > > >>>David Lessard
> > > >>>Mr_fixit@xxxxxxxxxxxx
> > > >>>Alexandria, Ontario, Canada
> > > >>>
> > > >>>
> > > >>
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