I'm having a issue with a fail code 1310 . Of the 16 leds number 4 and number 12 are lit, but this problem go's away sometimes.? I think the revision is 11,12,86.the service manual is kinda confusion.is this something I can correct entering info or something . Thanks.?

Does anyone know anything about programing a eeprom ? I have looking at a eeprom programmer. I was thinking if I could read the old one and transfer that data to the new eeprom. Would I be transferring bad data to a new device? The data is there, I'm wondering if it's a construction breakdown and the data is still good , anyone with any knowledge would be appreciated.??

On 9/7/22 19:54, Richard Cook wrote:

Does anyone know anything about programing a eeprom ? I have looking at a eeprom programmer. I was thinking if I could read the old one and transfer that data to the new eeprom. Would I be transferring bad data to a new device? The data is there, I'm wondering if it's a construction breakdown and the data is still good , anyone with any knowledge would be appreciated.

Many of us know a great deal about programming EEPROMs. I think with more specific information someone here should be able to provide some guidance.

But based on what you said above, if something is misbehaving due to issues reading an EEPROM, reading it out in an EEPROM programmer isn't likely to yield much benefit, as such devices access the chips in the same way they're accessed when in their operational device. There are other ways to get at that data, but would generally be considered impractical unless a great deal of time and money are available. (decapsulating chips, etc)

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

I'm getting a error code of 1310 upon turning the SA on. It's indicating eeprom u21. There is some hand writing in the manual (looks like corrections to the manual) that if you get that error code replace corresponding EEPROM. Which is U21.?
?Now that code doesn't appear everything I turn it on. Maybe about 75% of the time , and it didn't start giving me that code until I had ran it about 5 hours over 3 days. I got it off ebay and it may have been sitting for a while. .any ideas would be helpful, I have very little knowledge on SA's .
Thanks

On 9/7/22 20:42, Richard Cook wrote:

I'm getting a error code of 1310 upon turning the SA on. It's indicating eeprom u21. There is some hand writing in the manual (looks like corrections to the manual) that if you get that error code replace corresponding EEPROM. Which is U21.
?Now that code doesn't appear everything I turn it on. Maybe about 75% of the time , and it didn't start giving me that code until I had ran it about 5 hours over 3 days. I got it off ebay and it may have been sitting for a while. .any ideas would be helpful, I have very little knowledge on SA's .

It's interesting that it's so intermittent. Have you verified that the instrument's power supplies are stable?

What type of EEPROM is U21? (chip part number)

Do you know offhand what's stored in it?

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

I did recap the PS with high grade caps . I'll double check those rails and dig into it and see if I can get a part number for U21.?

On Thu, Sep 8, 2022 at 03:42 AM, Richard Cook wrote:

t's indicating eeprom u21

What others have said. Please check the type of EEPROM. They can be programmed in different ways.

I reflowed the pins yesterday on U21 but the error message didn't come up till after 30 mins of operation. . I have read that one guy didn't get the same error code till he did amplitude cal. I also did another cal yesterday . Maybe I need exactly what I do and when it rears its ugly head again. I'm beginning to suspect something other than EEPROM issue. What do you all think ??

If it were me, I would get a ROM reader and read all of the ROMs before using it again while I could, just in case one is failing.?

I have ran the unit all morning without any fail codes. Maybe this thing has sat for a long time and it's getting juiced back up? I think I will go with it as is and if the code comes back I'm gonna read and store the data with a programmer.? Cleaning the cards has helped a lot of issues. Thanks for all the help and suggestions from everybody.?

When you say "cleaned the cards". Can you elaborate? You pulled all the cards and cleaned them - how?

Yes I cleaned the contact points with alcohol and q tip, for the female receptacle part I used a acid brush and alcohol.??
Well guess what, it worked good, put the cover back on and my friendly fail code 1310 appears again. How aggravating. It indicates eeprom u21. I got the part number off the IC PMI 8639 1826-1048. I'm not sure how to read the chip I see a lot of chip with 1826-1048 but not the first number 8639. Can someone enlighten me on this.?
Thanks?

Those are part numbers and date codes. The numbers ave nothing to do with the programming.

Cheers!

Bruce

Quoting Richard Cook <richardcook331@...>:

I understand, but I'm looking to buy a replacement , the part numbers in the manual are NMOS 65536, also manufacturer 1818-3499, and manufacture code 28480.?

开云体育

The 1818-3499 is a HP part number.
It also crosses to X2864A manufacture code 10572.

Glenn

I understand, but I'm looking to buy a replacement , the part numbers in the manual are NMOS 65536, also manufacturer 1818-3499, and manufacture code 28480.?

-- 
-----------------------------------------------------------------------
Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv@...    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI, FRA, NRA-LM    ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"

Ah, I was about to go look that up.

It's not unheard of for 2816 and 2864 NVRAMs to fail.

-Dave

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Dave McGuire, AK4HZ
New Kensington, PA

Thanks Glenn,? I appreciate that valuable info!. Programers for that chip are not cheap too.?
Thanks

On 9/13/22 05:51, Richard Cook wrote:

Thanks Glenn,? I appreciate that valuable info!. Programers for that chip are not cheap too.

I can read and program those chips, if needed.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

If you send me the chips and data files, I will gladly program
any parts you need for the cost of postage.

-Chuck Harris

On Tue, 13 Sep 2022 02:51:10 -0700 "Richard Cook"
<richardcook331@...> wrote:

Thanks Glenn,? I appreciate that valuable info!. Programers for that
chip are not cheap too. Thanks