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

[John Phillips]

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 <john.phillips0 at gmail.com>
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 <tmicallef at gmail.com>
> 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, <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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>> > > >
>> > > > _______________________________________________
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>
>
>
> --
>
> *John Phillips*
>



-- 

*John Phillips*