I found one tiny cap in the Huntkey FX500SE, it has logo consisting of letter R in a sqaure. Since http://as.dip.jp/i/capacitor/ no longer works, I cannot identify that. Most likely general purpose, 85°C cap, PE seems to be the model line. Anyone familiar with that?
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Less jewellery, more gold into electrotech industry!
Half of the computer problems is caused by bad contacts 
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Re: R in square, who's that?
Oh damn new domain…
OK, cool, it's Rubycon, great
Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts
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Re: R in square, who's that?
It's probably not good and it's 85C anyways. But always like to see cap brands I've never seen before, care to post a picture?Comment
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Re: R in square, who's that?
It's Rubycon, look at the link. Too small to print the whole name I guess.Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts
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Re: R in square, who's that?
Saw that after I posted that postComment
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I have a Boss DD-3 (square chip taiwan version) in my bench with a very weird problem. I found no similar problem online, nor a solution for it. It is driving me nuts.
It passes sound on bypass no problem but as i turn it on it has a constant a noise (that can be clearly shaped by Delay Time, Volume and Mode, but very subtle by Feedback).
- sounds ok on bypass
- noise is there even without input connected.
- all electrolitic caps were changed (!)
- all tantalum caps were checked, ok.
- most ceramics were cheked. too many to keep track.... -
I have this Huntkey HK340-72FP PC SMPS where I am facing a strange problem where the SMPS shuts down when the load on any of its 12v output rails goes above 2 amps while the rating of each 12v rail is above 10amps capable.
I have checked the following:
1. All output caps are OK, and all output rails read correct voltages at no load
2. All output diodes are OK
3. NTC is ok
4. Hi voltage cap on input correctly reads 150uF on LCR meter per the spec, also the bridge rectifier is OK
5. No short in main switching MOSFET
6. All other components... -
Hi All,
Can someone please explain the difference between a 1kH square waveform with a 50% duty cycle and a similar waveform from a pulse generator?
Many thanks, -
I would like to share with you the good voltage testing of SMPS HK1502-3B for Lenovo All In one computer.
this is resonance Half bridge.
The 198VDC comes from the resonance IC supplying the Transformer for the 12VDC.
2. Check first the Big Filter capacitor using voltage testing (DC) with around 395 -400VDC if sometimes you see 350V check the Big Filter capacitor first but for me I all I encountered the IC for the resonance IC has issue if 198VDC is show this means that resonance IC is working properly.
3. Other issue mostly the POWER... -
Hi, I'm an elevator technician. The attached oscilloscope display picture is from a digital elevator hall arrival lantern data signal. We have been having problems with “ghost signals” causing intermittent hall arrival lanterns to illuminate randomly when the elevator is not actually due to arrive at the floor.
The tech support of the hall arrival board manufacturer (CE Electronics) is blaming the elevator controller manufacturer (MCE), and the tech support of the elevator controller blames the hall arrival board manufacturer.
The boards are powered by a ground referenced...
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