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2440 and 2465B battery/ram replacement
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I have both of these and would like to get these replaced with the new
style of chip that does not need the back-up battery. The (real) 2465B is still good. I do not know how long it will keep the data before becoming dead. The 2440 needs replacing. I know these original devices will go bad soon. I do not have or access to a programmer. I know I have the newer A5 board in the B with S/N 063838 (1994). I am in the mid-Atlantic area of the US. The caps and resistors in both have already been done. Mr. Yachad's 2465B site was used. Thank you Mr Yachad. I do not know what I would send. The whole piece, board, what. Is there anyone willing to do this and give me a price on these? I do not know if calibration is needed after the chip replacement. I know enough people in this group are good to expert at using and knowing the 2465B features. I got this one because of the praise it gets. The 2440 I have used some. The B is recent and I need to learn the features. This is new to me. I am used to the 7000 series and older. The 2440 has some FAIL modes. I think the CCDs are good. It likely needs calibration to clear the fail. This one still shows signals like should. I know I need to learn what all this one can do when it is working right. I have adjusted the power supplies to within a couple of mV to exact of the adjustments on each scope. I do this on other models as well. If anyone wants to contact in private, you can use the email. I will give my telephone number in a private email if any want it. That is a much faster way to get me and discuss anything necessary. Mark |
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Bob Albert
Mark, it never occurred to me to ship my 2440 board to someone willing to replace the NAVRAM modules.? If someone would do this for a reasonable price I would love to go that way.
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What happened was that I replaced my modules and the scope stopped working.? Maybe the new modules are bad or maybe I screwed up the installation.? But that's the situation I am in and would love to have someone fix the board. Bob K6DDX On Thursday, March 25, 2021, 06:45:56 PM PDT, Mark Vincent <orangeglowaudio@...> wrote:
? ? I have both of these and would like to get these replaced with the new style of chip that does not need the back-up battery. The (real) 2465B is still good. I do not know how long it will keep the data before becoming dead. The 2440 needs replacing. I know these original devices will go bad soon. I do not have or access to a programmer. I know I have the newer A5 board in the B with S/N 063838 (1994). I am in the mid-Atlantic area of the US. The caps and resistors in both have already been done. Mr. Yachad's 2465B site was used. Thank you Mr Yachad. I do not know what I would send. The whole piece, board, what. Is there anyone willing to do this and give me a price on these? I do not know if calibration is needed after the chip replacement. I know enough people in this group are good to expert at using and knowing the 2465B features. I got this one because of the praise it gets. ? ? The 2440 I have used some. The B is recent and I need to learn the features. This is new to me. I am used to the 7000 series and older. The 2440 has some FAIL modes. I think the CCDs are good. It likely needs calibration to clear the fail. This one still shows signals like should. I know I need to learn what all this one can do when it is working right. ? ? I have adjusted the power supplies to within a couple of mV to exact of the adjustments on each scope. I do this on other models as well. ? ? If anyone wants to contact in private, you can use the email. I will give my telephone number in a private email if any want it. That is a much faster way to get me and discuss anything necessary. Mark |
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Hi Mark,
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I can't help in replacing the RAMs, but I have some experience with the 2440/2432 etc DSOs. Don't be afraid to replace the RAM without saving it's content, it is much easier to get calibrated than the 2465. The first time I calibrated a 2440 I used a DC supply, and an old, low end function generator's square wave output. Since then I have much improved instruments, but it was possible to get it calibrated with minimum equipment. Especially, that if it is has not been calibrated for long you will probably need to do an internal adjustment and readjust the screen geometry and the CCD timing anyway (for that you'll need some kind of a signal generator) which requires clearing the nvram as a first step, so there is absolutely no need to save the ram or worry about losing its content. There is absolutely no point in saving and reloading the old data. Szabolcs Mark Vincent <orangeglowaudio@...> ezt ¨ªrta (id?pont: 2021. m¨¢rc. 26., P, 2:45): I have both of these and would like to get these replaced with the new |
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Not sure how many times I will need to post this on the forum, but here's Hugo Holden"s brilliant do-it-yourself battery/ram replacement with new technology:
And, yes, no matter how it's done, unless one has the means to read the old chip data and program it into the new, you will need to go through the full cal procedure. Probaly a good idea anyway given passage of time.... Reinhard |
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Chuck Harris
Hi Mark,
I am always willing to do the work. Contact me off group. -Chuck Harris On Fri, 26 Mar 2021 15:45:26 -0700 "Mark Vincent" <orangeglowaudio@...> wrote: Reinhard, |
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Bob Albert
Chuck, where are you?? I am in Los Angeles and would like to find someone who is willing to get my Tek 2440 working.? Maybe that's not you.
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The history is that when I got it, it worked but would not hold settings on power off.? I decided it must need new NVRAM modules and swapped in some I got from China on ebay.? Now the scope doesn't work at all.? I swapped one module back but still no joy.? It turns on but the display is messed up and it won't respond to any controls. I would like to find someone who is smarter than I who is willing to correct my mistakes and get the scope operational again.? If you can assist in any way I would appreciate it.? I am willing to pay a reasonable amount, as well. Thanks, Bob On Friday, March 26, 2021, 07:24:54 PM PDT, Chuck Harris <cfharris@...> wrote:
Hi Mark, I am always willing to do the work.? Contact me off group. -Chuck Harris On Fri, 26 Mar 2021 15:45:26 -0700 "Mark Vincent" <orangeglowaudio@...> wrote: Reinhard, |
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