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| Agilent 34970A errors and battery replacement |
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| free_electron:
Thats corrupted cal memory. I can fix those. |
| plantgrower:
>Thats corrupted cal memory. I can fix those. Can you please tell me how ? Does it involve soldering a new chip. I couldn't find that f-ram version only the eeprom version on digikey. I presume it also involves the machine being recalibrated. If you could tell me what to do it may be worth having a go rather than sending it back. |
| free_electron:
It involves replacing 1 chips programmed with a known good image. part number is FM24C04B-G Then a recalibration is in order. it may still fail calibration if there is really a defect on the dmm card. but out of the 8 machines I fixed I've only had one with a broken card. The rest were all revived. |
| plantgrower:
How do I program the chip with the image ? I paid £147/230USD for this machine I think its just seven years old. It looks immaculate on the inside very good on the outside. The person selling these had quite a few to sell and this was the only machine with a problem. The others he sold for £290/454USD. Sounds like it may be worth trying to repair it. Agilent want a lot more than 75USD to calibrate it though more like 180USD. Thanks for all the help. |
| free_electron:
you need an eeprom programmer that can handle the frams ... and the image file. I can send you a programmed fram if you want. but you will have to wait a few weeks.. |
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