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#1 |
Leaking Member
Join Date: Dec 2014
City & State: Atlantic Canada
My Country: Canada
Line Voltage: Ground, 0Hz
I'm a: Hobbyist Tech
Posts: 5,218
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![]() Well, my trusted Agilent DSO-X 2012A quit on me this morning after an hour of work. Darrn... in the middle of something of course.
![]() Called Agilent Tech Support and they were awesome in helping me to find a new one (Thanks bud R.R.!). ![]() Anyway... since that bean is already bad, why not open it and see if I can fix it? Sorry no pics this time around. However here is the fix: * Fuse F1 blown 250V 6.3V mini * Main filter capacitor dead short and hot as @#$%^! 420V 100uF Took the main filter cap out, checked for other shorts or opens on the PSU and I didn't find any. Replaced the fuse and the main filter cap with parts out of my bin and all is O.k. Happy ending at least. Back to work. ![]() Cost: Zero $$$ |
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#2 |
Great Sage 齊天大聖
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 26,804
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![]() so what shit cap was it?
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#3 |
Leaking Member
Join Date: Dec 2014
City & State: Atlantic Canada
My Country: Canada
Line Voltage: Ground, 0Hz
I'm a: Hobbyist Tech
Posts: 5,218
|
![]() I should have figured that you would want to know...
![]() It was a Nichicon GU(M) series, 105C rated. 420V, 100uF Visually it is looking normal, maybe a slight bulge on the top if light shines on it. However it has a dead short like 0.2 Ohm. I replaced it with a 400V, 120uF cap I had... and the fuse too... Works fine as kind! The PSU has a PFC built in. Does 12V at like 10 amps or so. Look at the attachment. |
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#4 |
Great Sage 齊天大聖
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 26,804
|
![]() hang on, why does a scope need 12v at 10A??
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#5 |
Leaking Member
Join Date: Dec 2014
City & State: Atlantic Canada
My Country: Canada
Line Voltage: Ground, 0Hz
I'm a: Hobbyist Tech
Posts: 5,218
|
![]() Good question. Apparently the PSU only has one output and that is 12V and it can do 10 amps. I don't know why that ole scope needs that kind of power, but it does have a few extra things like a generator.
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#6 |
Great Sage 齊天大聖
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 26,804
|
![]() too bad it has pfc.
the rigol and siglent dont. this means you can run them on dc from battery packs ![]() |
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#7 |
Leaking Member
Join Date: Dec 2014
City & State: Atlantic Canada
My Country: Canada
Line Voltage: Ground, 0Hz
I'm a: Hobbyist Tech
Posts: 5,218
|
![]() yeah... the Siglent is very nice for the money. Mine is getting old now, but still works good... well... as long as the caps don't short out...
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