Less than two years old, two 470uF, 25V, one 470uF, 10V (bulging despite no slits on top), and one 1000uF, 10V caps failed.
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Re: RCA analog-digital TV converter box
what brand are the caps???
and maybe its me, but the top of the one on the bottom left corner of the pic looks kinda funny on the top too.. usually you see distinctive lines for pressure release, that one almost looks like someone tapped the top with a flat head screwdriver. -
Re: RCA analog-digital TV converter box
Those two brown ones in the bottom left corner are Su'scon (neither is swollen, but the pressure relief marks are shallow and seem cut rather than stamped), most of the black caps, including the swollen ones on the left have this logo on them:
Some other black ones, including the swollen one on the right, is labelled "Jwco"
The dark greens are KSCComment
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Re: RCA analog-digital TV converter box
never heard of any of those brands.. but then again, i am also kinda new to the whole cap thing too and mainly work on things like video cards and motherboards so far.Comment
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Re: RCA analog-digital TV converter box
i'm surprised there are so many in it,
most boxes i see only have a few where the psu connects other than the small ones around the video/oudio outputs.Comment
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Re: RCA analog-digital TV converter box
This unit has a lot of DC-DC converters on the main logic board, which can add confusion to which capacitors to replace (not just the bad ones).My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.Comment
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Re: RCA analog-digital TV converter box
What's that RJ12 phone connector for?Elements of the past and the future combining to make something not quite as good as either.Comment
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The NB670 NB670GQ is a fully integrated high frequency synchronous rectified step-down switch mode converter with 3.3V fixed output voltage. It offers very compact solution to achieve 6A continuous output current and 9A peak output current over a wide input supply range with excellent load and line regulation. The NB670 operates at high efficiency over a wide output current load range. Constant-On-Time (COT) control mode provides fast transient response and eases loop stabilization.
Under voltage lockout is internally set as 4.65V. An open drain power good signal indicates the output...10-23-2024, 03:23 AM -
I'm trying to fix this Canopus converter so that I can convert lots of old VHS cassettes. The problem is that it turns on for a split (and I mean split!) second, the fan jerks and then.. nothing. I've checked the power brick works. I've opened up the converter itself and been testing for shorts.
The image attached shows the on/off switch (which I've checked works) to the left of the yellow socket. Below the yellow socket is a green block marked 26 with a strange symbol at the front. Putting my probes either end of this block, on the silver parts, gives an open short... -
hi
in an inverter of aircondition i have dc to dc converter mes1515mh
i have attachment the pdf file
can i take a dual converter with two dc outputs instead this ? because i cannot found the same or is not possible ?
the problem is instead 15 volt dc output i have only 6,45 volt
thanks on advancxe... -
zz0.8tpitu4y0i8zzI bought a ch341a (I'm waiting for it to arrive) and I noticed that the programmer has a bug that the data pins go to 5v when the VCC pin is at 3.3v (which is the voltage I'm looking for).
Instead of doing the 3.3v mod, I'm thinking of converting the 5v to 3.3v with an 8 channel TXS0108E through the ZIF socket but I don't know if that would work, because it has to circulate voltage and also information.
What I am looking for is something that will convert from 5v to 3.3v but without modifying the ch341a.
I can't buy the ch341a 1.6v that has... -
You may know this, but all Intel Core CPUs from the fourth generation (Haswell) onwards have an on-die DC-DC converter, and a System on Chip (SOC) which has such is the Broadcom BCM2835 (and certain other SOCs used in the Raspberry Pi) - the only external components for the DC-DC converter are inductor(s) and filter capacitor(s) and in some cases, feedback voltage resistor divider(s).
Do you know of any other SOCs which have an on-die DC-DC converter?
Comment