[TechAssist] Re: EEPROM programmer
- From: Randall Torda <lectrics284@xxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 9 Jun 2005 17:32:34 -1000
John,
I have breadboaded a simple EPROM programmer
using Radio Shack parts and and old serial DB9
computer cable. The circuit consist of only two
4.7 zeners, couple caps, couple resistors, and one
78L05 regulator. The programmer is only for
24CXX serial eproms. The pony programmer can
be downloaded at: http://www.lancos.com.
The circuits that they show for breadboading are
a little more complex. I've tried the one that uses
the parallel port...but I could never get to work
properly, so I breadboaded one using my simple
circuit using the serial port.. I use it to copy, verify or load EPROM
data. You can even edit program data. You
can save the data in e2p, hex,bin etc if you want
to use other eprom software.
I don't have any schematic producing software
to make it look nice so I have to draw it out manually, scan it and send
it
to you and if anybody wants to try it then I'll upload it.
On Thu, 09 Jun 2005 21:32:15 -0400 "John @ Myers TV "
<myers_tv_b@xxxxxxxxxxxxx> writes:
> Hi Bruce,
>
> I was thinking of the name Pony, but I wasn't sure if it was a brand
>
> name, or not. I'm probably going to use it on just 8 pin dips, so
> I'll
> start looking for the pony programmer.
> I also have the CC, and I've also learned to take its advice with a
> grain of salt.
>
> Thanks,
>
> John Myers
> Myers TV Service Co.
> 376 E. State St.
> Alliance, OH 44601
>
> Voice / Fax: 330-821-6545
> Myers_tv_b@xxxxxxxxxxxxx
> http://www.myerstv.net
>
> Work as if you were to live a hundred years,
> Pray as if you were to die tomorrow.
> Ben Franklin
>
>
>
>
> Bruce Tiedeman wrote:
>
> >John , I have a CC that is 3 years old and a cheap little Pony
> style
> >programmer. I have fixed difficult problems with my CC. On the
> other hand it
> >cost me a lot of wasted time. I had a RCA 35" TV with a Gemstar
> module and
> >every thing pointed to the EPROM. I used the CC to check and reset
> the EPROM
> >to factory setting which it did and confirmed EPROM OK.. I still
> had the
> >problem. After spending a lot of time checking other things I took
> apart
> >another set (RCA 27'") with a Gemstar module and copied the EPROM
> data with
> >my cheap little unit and then wrote the data to the problem set .
> This fixed
> >the set. I just had to go into the service mode and set up the
> vertical and
> >horiz scan for the new eprom.
> >"The original problem if I can remember was the set would stay on
> one
> >channel after running the auto programming and the picture was off
> frequency
> >like a AFT problem."
> >I still don't have confidence in my CC but the little Pony unit
> always works
> >good on the 8 pin EPROM's and many Techs on our list have the EPROM
> data for
> >different sets they will share.. The Pony unit will do most any 8
> pin EPROM
> >unlike the RCA CC (Chipper Check) unit.
> >
> >Bruce
> >
> >B&T Electronics
> >139 Margaret St
> >Sarnia Ontario
> >Canada
> >N7T 2Y3
> >519 344 1850
> >
> >----- Original Message -----
> >From: "John @ Myers TV" <myers_tv_b@xxxxxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Thursday, June 09, 2005 3:27 PM
> >Subject: [TechAssist] EEPROM programmer
> >
> >
> >
> >
> >>Hi,
> >>
> >>I remember reading a post, maybe a year ago about EEPROM
> programmers. I
> >>didn't buy one then, but I'm ready to spend the bucks now.
> >>Is there a programmer that you like, or would reccomend? I'm
> planning to
> >>use
> >>it on the 8 pin dips from the RCA's and the Magnavoxes.
> >>
> >>Thanks,
> >>
> >>John Myers
> >>Myers TV Service Co.
> >>376 E. State St.
> >>Alliance, OH 44601
> >>
> >>Voice / Fax: 330-821-6545
> >>Myers_tv_b@xxxxxxxxxxxxx
> >>http://www.myerstv.net
> >>
> >>Work as if you were to live a hundred years,
> >>Pray as if you were to die tomorrow.
> >> Ben Franklin
> >>
>
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