That is very helpful Bill! Thanks so much... You are the first person who has told me of actually getting this to work. I have been changing out the chips one at a time. I still have the 16K chip to go. It could just be that one. I am waiting for a 24 pin socket which should be here Friday to change it out.
I have been looking at the programer to see if I could get a before and after memory dump mostly to see what changed and to see if I use different chips if I get different values. 5V = 5.06 with 1.5mv ac Thanks again. On Wed, Aug 20, 2014 at 4:43 PM, John Phillips <[email protected]> wrote: > Thanks... > I have been looking at the > http://www.ebay.com/itm/Universal-EEPROM-Flash-SPI-BIOS-24-25-BR90-93-USB-Programmer-6000-CHIPS-SP8-B-/371031966902?pt=LH_DefaultDomain_0&hash=item56633a84b6 > > Do you think that would do the chips? > > > On Wed, Aug 20, 2014 at 4:25 PM, Todd Micallef <[email protected]> > wrote: > >> John, >> >> Don't forget to measure your 5V power supply output. I doubt you are >> having >> a problem with it but the NVRAM write is disabled below a certain voltage >> (~4.25v) >> >> Todd >> >> >> On Wed, Aug 20, 2014 at 6:50 PM, <[email protected]> wrote: >> >> > the easy way to read nvram through usb is a usb-programmer that has your >> > ram in its list of supported devices:-) >> > >> > this will not solve your problem though. if you reboot the unit after >> the >> > first error messsage, amd the problem still exists, it is probably not >> with >> > the nvram. then it could be things like bus drive, chip select logic... >> > ne way to avoid spending 3k is to bus the cpu board, this is cheaper. >> > >> > >> > >> > > Gesendet: Mittwoch, 20. August 2014 um 22:37 Uhr >> > > Von: "John Phillips" <[email protected]> >> > > An: "Discussion of precise voltage measurement" <[email protected]> >> > > Betreff: Re: [volt-nuts] HP 3458A Mem test 1 hight. How do you read >> 32K >> > memory chips? >> > > >> > > Yes they are DEI220Y-150 and DSI230Y-150 >> > > On Aug 20, 2014 4:09 PM, "J. L. Trantham" <[email protected]> wrote: >> > > >> > > > John, >> > > > >> > > > Which chips are these? Dallas NVRAM's? >> > > > >> > > > Do you have a part number? They can probably be read and programmed >> > with >> > > > the appropriate chip programmer. >> > > > >> > > > Joe >> > > > >> > > > >> > > > -----Original Message----- >> > > > From: [email protected] [mailto:[email protected] >> ] >> > On >> > > > Behalf Of John Phillips >> > > > Sent: Wednesday, August 20, 2014 3:54 PM >> > > > To: Discussion of precise voltage measurement >> > > > Subject: [volt-nuts] HP 3458A Mem test 1 hight. How do you read 32K >> > memory >> > > > chips? >> > > > >> > > > Hi, >> > > > I have removed my 32k memory chips form my 3458A. Doe anyone have an >> > easy >> > > > way to connect them to a windows computer. USB would be my preferred >> > > > connection to a 28 and 24 pin socket. I would like to be able to >> read >> > and >> > > > write to the chips to validate the data. >> > > > I have replace the chips and still get Mem test 1 High on start up. >> > > > I really do not want to spend close to $3000 for KeySight to fix >> > this. >> > > > >> > > > -- >> > > > >> > > > *John Phillips* >> > > > _______________________________________________ >> > > > volt-nuts mailing list -- [email protected] To unsubscribe, go to >> > > > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >> > > > and follow the instructions there. >> > > > >> > > > _______________________________________________ >> > > > volt-nuts mailing list -- [email protected] >> > > > To unsubscribe, go to >> > > > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >> > > > and follow the instructions there. >> > > _______________________________________________ >> > > volt-nuts mailing list -- [email protected] >> > > To unsubscribe, go to >> > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >> > > and follow the instructions there. >> > _______________________________________________ >> > volt-nuts mailing list -- [email protected] >> > To unsubscribe, go to >> > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >> > and follow the instructions there. >> _______________________________________________ >> volt-nuts mailing list -- [email protected] >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >> and follow the instructions there. > > > > > -- > > *John Phillips* > -- *John Phillips* _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
