[volt-nuts] HP 3458A Mem test 1 hight. How do you read 32K memory chips?

[Todd Micallef]

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, <acbern at gmx.de> 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" <john.phillips0 at gmail.com>
> > An: "Discussion of precise voltage measurement" <volt-nuts at febo.com>
> > 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" <jltran at att.net> 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: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com]
> 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*
> > > _______________________________________________
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