Tektronix 2230 Power Up Failure

dodger741 wrote in news:3e37a02c-14eb-465a-9e1f- snipped-for-privacy@c23g2000hsa.googlegroups.com:

IIRC,2230 had a lithium coin cell holder on the top digital board,or a 123 lithium cell underneath the top digital board.(soldered to it)

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Jim Yanik
jyanik
at
kua.net

Thanks for the quick response... Is the board you are referring to the one that has the plastic hinges for tilting the board up. Do you think the battery might be associated with the message I am getting as I suggested? Roger

dodger741 wrote in news: snipped-for-privacy@l1g2000hsa.googlegroups.com:

yes,it's the only board on the top of the instrument. I don't know about the error messages.It's very possible. Those batteries only have a 10 yr shelf life. The 2230 has been out of support longer than that.

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Jim Yanik
jyanik
at
kua.net

be found that looks like a battery. There are two daughter boards attached to the back but they look like some sort of high frequency analog boards because of the metal shield. Strange to think that their is a built in message that they don't mention in the manual! I may never know.

Oups! I'll power up mine these days to look at! It has not been used since a while as I prefer to use the 2465b and keep the

2230 as spare... If you find something in the battery area please let us know... I'll do the same...

pf

"dodger741" a écrit dans le message de news: snipped-for-privacy@i72g2000hsd.googlegroups.com...

Still searching for answers. I did find a post on yahoo which listed a battery idea but also mentioned a low self-discharge current capacitor. I suppose you could do something like that although I wonder about the reliability of it. I did search the parts list for "special" caps and found nothing.

Finally I found the battery. It was buried underneath the metal housing holding the GPIB board next to the CRT neck shield. It supplies power to the extended memory (26k) which is part of the GPIB interface. I noticed that the memories on the GPIB daughter board retained a little voltage when turned off and that their was a diode in the supply trace. Followed this to a 4 pin connector which led me to the battery. PROBLEM SOLVED!!

Thanks to all who commented and helped me solve this problem. Roger

So now you're re-volt-ing, right?

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                              God help us all,
          The next President of the United States will be a liberal.

Do you have the battery type, or any other informartion in case somone else looks through the Google Groups archives later on?

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

It was a Panosonic Lithim Battery BR-2/3A 3V with solder tabs. Approx .625" Dia x 1.25" Long Roger

IS it possible to replace the battery without loosing the calibration parameters? Or do you have to recalibrate the scope after the battery replacement?

pf

"dodger741" a écrit dans le message de news: snipped-for-privacy@h11g2000prf.googlegroups.com...

My review of the manual indicates that all calibration is done manually. The battery is only used to store the trace data in "extended memory" which is accessible by the GPIB interface. Roger

Thank you Roger, so it's not like on some others scope like the 2465b where you loose the calibration parameters when the battery is over... So I'm less anxious and in a hurry...

pf

"dodger741" a écrit dans le message de news: snipped-for-privacy@s19g2000prg.googlegroups.com...