[TechAssist] Re: Samsung TV - TXE2749 - KCT52A - EPROM Question (FIXED)
- From: "jonas miglinas" <miglinasj@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 4 Apr 2005 20:30:52 -0500
I use the Dick Smith meter. I think it was more of a strange cap than a
meter failure. It took a third meter (made I believe in the early 60's) to
show the cap was going bad.
Jonas Miglinas
Miglinas TV
Chicago
----- Original Message -----
From: "J. Knoll" <jaystv@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, April 04, 2005 6:48 PM
Subject: [TechAssist] Re: Samsung TV - TXE2749 - KCT52A - EPROM Question
(FIXED)
> 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
> -------------------------------------------------------
> PS:
> If replying to this email, please include all previous correspondence.
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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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