Electronics > Repair
Rohde & Schwarz UPV Audio Analyzer - teardown and repair
DaJMasta:
A cheap hot air station can certainly do the job - I'd maybe practice removing some parts on other boards before I tried in in my test equipment, but those $40 Chinese made air stations certainly do the job and are reasonably consistent and adequately powerful.
You should be able to buzz out the relay contacts and coil with a multimeter even without removing it, as the gull-wing lead style sticks out a bit beyond the relay case. Then you can probably make sure that the negative voltage isn't present on the input side of the relay - suggesting that the relay would be working but something farther upstream wasn't working. If it seems bad, if you're then able to remove it, you should be able to verify that the negative voltage doesn't appear at the output once removed.
AMPEXPERTS:
Thank you. I've actually ordered one of those workstations on Amazon today. I also ordered the IM03 gull wing leaded relay.
I was able to compare against the good channel with an ohmmeter, the continuity of the circuit. In the damaged channel, the continuity is lost. I also verified that I have 4.7 VDC control voltage on the coil of both relays. One relay isn't making closure anymore.
I will practice on some old PCBs with the hot air workstation to figure out optimal temperatures and times.
Will follow up on my results.
harha:
Hi
Just got an new to me R&S UPV.Its with alot of hardware and software options.Very nice unit from 2015--but it have a fault.It says generator overload and shuts off the generator output!
Have been looking for a real service manual with no luck.But the instrument came with two cd`s--here are what they call-service manual-for UPV.Its a service manual without schematics--can share if needed.
Have the complete service info for UPL.It looks close to the UPV??.
Any help appeciated
Hardy
harha:
Hi
Still have problem with generator overload!.
Tried to nail down the problem-my unit have generator 1 , generator 2 and lowdistortion generator.First reomeved generator 2--it didnt solve the problem,then lowdistortion generator unplugged,still no change--so at least generator 1 faulty--or maybe firmware???.
Did clone the original ssd and with this working cloned unit i updated from ver 3... to the last firmware.
It whent smooth,working--but in some way its calibration lost.Then it say i can calibrate it by connecting aux in to aux out!!!-here i stopped,not sure its clever to try with a faulty generator.
Any idea on how to move old cal data to new cloned unit??
Hardy
harha:
Whole UPV cd here
https://www.file2send.eu/de/download/4DzUOOzYVKEqkPJfckRyzW5BXKT5enb2G7XUttBuVEPZKekwhOiCfH3nsD0SnhPq
Hardy
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