[TechAssist] Re: Need refresher on RCA EEPROM replacing...]
- From: Kevin <kevintv@xxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 22 Jan 2003 13:15:07 -0800
I can buy preprogrammed generic eeproms. The data is taken from a
working set and may or may not work perfectly with a particular set. I
have used the PP ones many times and have found the tuner parameters to
be very close to the ones found in the bad eeprom. I have also found
that if a set is dead because of the eeprom, then the procedure of using
the socket only works about half the time because all the data is
corrupted.
There also is a way to set the tuner parameters by monitoring pin 12 on
LA7610. You then use the Electronic Tuner Alignment Parameters chart to
set the TV to each channel in the chart. Then you adjust the parameter
to the lowest voltage at pin 12. Watch the picture as well. I have
used this method twice now as I don't repair enough RCA's to warrant
buying a chipper checker.
Kevin Wilks
Kevin's TV & Video Repair
Penticton BC Canada
kevintv@xxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Phillip R. Hull
Sent: Wednesday, January 22, 2003 12:52 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Need refresher on RCA EEPROM replacing...]
Once and for all( I hope), these IC's are not preprogramed, they are
set
with average values, also the tuner will have to be realigned with
Chipper
Check, unless you can write down all the tuner parameters before
replacing.
Phillip R Hull STET
phil245@xxxxxxxxxxxxx
----- Original Message -----
From: "Kevin" <kevintv@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, January 22, 2003 3:31 PM
Subject: [TechAssist] Re: Need refresher on RCA EEPROM replacing...]
>
> Sometimes the data is corrupted. Then your only option is to get a
> preprogrammed eeprom. They are available form Main Electronics in
> Vancouver BC Canada. 250-872-0267 Ask for Mike or Daniel. You may
> still have to adjust the tuner parameters to get a good picture on all
> channels.
>
> Kevin Wilks
> Kevin's TV & Video Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Philip Bader
> Sent: Wednesday, January 22, 2003 6:04 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Need refresher on RCA EEPROM replacing...]
>
>
> Not to drag this on,but I remember trying this.Probably didn't do the
> right sequence,but all I managed to do was transfer the old corrupt
> parameters to the new "blank" chip,so now I have two exact chips with
> corrupt data.
> How does it transfer the "good" data without also the bad?
> Phil Bader
>
> Jeff Dougherty wrote:
> >
> > Harlan,
> > Place old EEPROM in socket, turn set on, replace old EEPROM with new
> one.
> > I have had luck with ordering the correct EEPROM for the specific
> chassis and all
> > I have to adjust, if anything, is the horizontal freq.
> > support@xxxxxxxxxxxxxxxxxx
> > FAX 717-564-4952
> > Jeff Dougherty
> > Intrepid Video & Electronics Be careful of your thoughts.
> > 501 Luther Rd They may become your words
> > Harrisburg, PA 17111 any moment.
> > 717-909-8844
> > VCR tips, electronics info & general interest.
> > www.intrepid-video.com www.tech-repair.net
> > www.thetoolcaddy.com www.9-11-2001tragedy.com
> >
>
***********************************************************************
> >
> > ----- Original Message -----
> > From: "Philip Bader" <tjanphyl@xxxxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Tuesday, January 21, 2003 10:57 AM
> > Subject: [TechAssist] Need refresher on RCA EEPROM replacing...]
> >
> > I forwarded this to the group for a tech. PLease help.
> > Phil Bader
> > Hi,
> > Have here an RCA CTC 177 and suspect bad eeprom chip as the set
will
> > not power on and have check all the ususal "stuff" ... standby
> > supplies, etc.
> >
> > Question is... was there a procedure when putting in the new eeprom
> > where you put in a socket also and then can extract the parameters
> > yet from the "bad" one so as not to have to do an entire alignment?
> >
> > If there is such a process, what were the steps?
> >
> > Thanks,
> > Harlan
> >
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> --
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
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