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Keysight 34465A reliability

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HighVoltage:
I have just opened up my 34465A and took a few pictures.
This 34465A is in perfect condition and has worked well for many years already.

No extra PCB and no hand soldering anywhere.
The main PCB number is: 34465-26501 REV 004 KEYSIGHT MSS-B


Maybe you got a prototype of a new generation?


skander36:
duno ... maybe @Keysight DanielBogdanoff  know  :)
The boards looks identical except components from pic attached (with red) that was moved onto the daughter board. Does not seem to be a prototype.
Also I am not sure if they changed Flash chip. Actual one that is used is Winbond as can be seen(attached).
Can you compare it with one from your DMM?

TheSteve:
I would guess that the design was changed so that a single main board could be used with all versions, 34460 to 34470.

Traceless:

--- Quote from: KeithFisk on April 18, 2022, 09:56:11 am ---@Traceless: I have asked the service agent to go ahead wit the repair but have no expectation of any concession or discount on parts and labour from Keysight.

--- End quote ---

Thanks for reporting back. If you have your device back and don't mind sharing I'd also love to hear what they charged you. Based on SteveyG's experience the problem seems to be no isolated case, just in case anyone else here runs into the same problem knowing the exact repair cost in advance would be interesting.

Smith:
Small update, I now know why my transformer from the 34465A was fried. There was a dead short on the frontpanel, one of four 10uF 1206 caps was shorted. After I replaced it I luckily had the mains meter on it. The frigging thing took 120W, instead of the normal 11-12W from the socket. Even while it was turned off. Never had anything fry a transformer because of something so stupid. But there is a solution, I've ordered a Keithley DMM6500 to replace this crap.

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