Electronics > Repair

TDS3014 adventures

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analogRF:

--- Quote from: james_s on September 30, 2019, 01:28:42 am ---In case anyone cares, I took a look at my notes today and the power-on hours are simply stored as the number of minutes in hex format in locations x7E0 through x7E4 in the DS1742W. I'm not sure why this wasn't immediately obvious to me last night, I guess I was tired.

--- End quote ---

what about the number of power cycles? I think it must be sitting in this chip because when I lost the data on mine (3054B) that value also got lost

james_s:
No, not in the non-letter series at least, I don't have a B series to check. My power-on count remained after replacing the NVRAM.

Kodim:
Known issue. In my TDS3054, the lithium battery in the DS1742 chip died. As I understand it, there are two ways to solve this problem. Replacing the old battery mechanically in the original DS1742 and making an adapter for the DS1744. I do not have a programmer. Can I perform any of these operations without a programmer? Thanks.

james_s:
Yes you can do either one. The only thing you need a programmer for is if you want to retain the power-on hours, though I suspect there is a way to write this via GPIB.

If you power on the scope while holding down a button (B Trig I think?) it will initialize a blank NVRAM.

Kodim:
James, your comments helped me rebuild my TDS3054 oscilloscope. I remove old battery from the DS1742W chip and install an external battery. I did not use the programmer. Operating time was  not reset. Everything is fine! Thanks!

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