Electronics > Repair
Repair : HP 3245A precision DC/AC source
deadlylover:
The same thing happened to my 3457A, same mains filter too, those Schaffner made in Switzerland ones are cursed. After a cosy life of 100V mains, mine only took 5 seconds to blow when exposed to the full wrath of 240V.
Your lab is going to be smelly for weeks. :-DD
free_electron:
awww , maaaaaan. that 'paffner' puked its guts all over that pretty gpib interface.
THe problem in those paffner things is they used those amber colored foil RIFA caps that are notorious to go kaboom...
alanambrose:
Q'n is what other eqpt has those dodgy parts inside?
TiN:
Whoa.. I got Delta EMI filter already, but was thinking to replace it later. Now I hear you, and will swap it tonight.
No I did not have cal program ready yet, as got carried away with more issues in 3458a instead :(
Can you post few more photos of your analog side boards, I wonder if any difference there as well.
alanambrose:
>>> Can you post few more photos of your analog side boards
OK here goes, will put up the highres versions on my website. Bit of a mech design bodge getting the B channel out as you need to move the metal deck due to interference between the support posts and the backplane connectors, duh. Also, it's mounted so you can't get at the component side without taking it out. I can see why, but I think they could have come up with a better solution. Have not compared it detail yet, but both channels look identical ... including a 2nd vref. As they we're clearly borrowing a lot of parts from the 3458A already, I wonder why they didn't use just one 3458A vref for both channels? Noticed one bodge wire on the digital btw. C900 looks tricky to source as it's got a screen connection - not sure how important that is. Plan to write a 3245 / 3458 cal program presently.
Alan
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