Products > Test Equipment
Repair of Return LeCroy/Preamble 1855A differential amplifier
TheSteve:
We're all thinking it - it needs to end up in TiN's hands, lol.
rx8pilot:
Part of me would love to skip work for a week and see if I can meet the challenge. It would be a sweet victory to find the issues and bring this gem back to life.
Sent from my horrible mobile....
rx8pilot:
It's officially a dead project. On it's way back to the eBay seller. I hope the refund process is smooth and easy.
Parting notes: This instrument has the shittiest mechanical design I have ever experienced. The electronics on the other hand seem very well designed. I have another one of these already, and it works really well huge common mode range, CMRR and low noise even at 10x amplification. As long as I never have to attempt service ever again - I love these things. Looking for another one now.
TiN:
Likely a wise move. Could be just one opamp fried, but more like whole cluster of issues. Easily one of those 200+hr projects, with steep learning curve. Thanks for teardown anyway!
P.s. I have plenty ToDo's for next year already. And much more to come soon :)
steve_tech:
Too bad I didn't see this earlier. I was involved in calibration, repair, and sustaining engineering for the 1822 and the 1855.
It was difficult cramming all the guts in a PacTec box. The have been around for more than 15 years. Not bad for test equipment.
They were never intended to be serviced by the user. The original calibration procedure was 26 pages, single spaced, double sided.
Early on, production was one per day.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version