Re: 250V AC Capacitor across input
That is the Arc Discharge stage lighting system.
Read here:
http://www.lrc.rpi.edu/programs/nlpi...l/abstract.asp
http://www.mjguide.com/tutorials/Lighting/583.htm
http://www.ehow.com/how-does_5692618...ide-lamps.html
http://en.wikipedia.org/wiki/Arc_lamp
Since this cap is enlcosed in very hot enviroment, they do fail quite often.
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Re: 250V AC Capacitor across input
Hi Bud, it's a Spot 150XT
Spot 150XT Manual
It's C1 in the diagram below...
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Re: 250V AC Capacitor across input
What kind of lighting system is this? Arc lamp? Gas Discharge?
Can we see this spotlights?
There are safety caps that are used across the line, or line to ground, or neutral to ground.
https://cdn.badcaps-static.com/pdfs/...b8818c3858.pdf
http://www.kemet.com/kemet/web/homepage/kechome.nsf/file/KEMET%20Kollege%20Presentations/$file/EvoxRifaRFIandSMD.pdf
Then the PFC cap which is used across the line, which is more likely to be in your case if it has high inductive circuits.Last edited by budm; 10-19-2012, 10:54 AM.Leave a comment:
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250V AC Capacitor across input
Hi lads, I'm looking at a spotlight that is getting 0 voltage on it's 240V lightbulb rails... but I'm a bit confused.. There is a large 20uF capacitor marked as 250V AC across the live and the neutral, just after the fuse.. After a quick google, I've discovered that this is to prevent arcing when it is switched on, but there really isnt a huge amount of information on using a capacitor in parallel on an AC circuit. Can anybody clarify this for me...
I assume that I can just pull this out of the circuit and switch on and it will work away the same.. or is there a large possibility of arcing with this type of circuit.. i.e. a spotlight..
I think the cap may be causing the problem even though it checks out fine with the ESR meter.
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Title:
Capacitor detached from PCB – RTX 2070 Super Founders Edition
Description:
During maintenance on an RTX 2070 SUPER Founders Edition, I found a capacitor lying on my desk after reassembly.
I did not notice it detaching, so I am unsure of its original location on the PCB.
Procedure performed:
- Removed backplate
- Cleaned heatsink and PCB with isopropyl alcohol + soft ESD brush
- Reapplied thermal compound
- Reassembled card
Observed behavior after reassembly:
- GPU powers on and operates normally under... -
So, I have a really bizarre issue that I'm struggling to identify the cause of. Working on an 820-02020 board with some bizarre keyboard/input-source character mapping. My suspicion is a possible damaged SPI ROM (U1970), perhaps, but I'm really not sure in this case:
1. The issue is pretty weird, but when installing MacOS, I noticed my WiFi password did not work. I quickly realized the special characters (!@#$%^& etc) were not mapping correctly.
2. I noticed the keyboard layout/input-source is defaulting to JAPANESE every single time I restore the board. I am not... -
Hi people, I hope this is the correct spot to post this, I'm new to the forum.
I have an RTX 3080 Founders Edition which has a burnt up capacitor (it was in parallel with another capacitor which appears damaged too), so I am hoping to be able to identify the capacitor values and order replacements.
I hope these photos make it clear which component I am referring to:
(yes, the soldering is a bit botched from removing the blown one, I know)
I have found the board schematic (attached), but there does not seem to be a boardview available. I have never... -
I replaced some capacitor which is located on optical pickup pcb which is shown in the table below(PCB #2).Because it have been out of order.
Now,It works very well,But I just have found that all caps (6svpc100my and other part number as well) ,which is shown in the table below, has ultra-high ripple current spec.
It is not able to obtain any capacitor which can be a substitute for this ultra-high ripple current nichicon capacitor.
So I replaced it with samxon and rubycon's general capacitor(GP,YXA series).
I know that these capacitor will not last as long as nichicon capacitor... -
I desoldered samwha NF capacitor(50v 5.6uf) from PCB circuit of 29inch CRT TV which have symptoms of no display after I heard sound of inrush of current to TV whenever I switch on this television.
I measured ESR value of this non-polarized capacitor(samwha NF capacitor 50v 5.6uf) by means of MESR-100 ESR meter and It displayed 0.3 ohm
And When I measured its capacitance with digital multimeter and LCR-T4 Mega328 meter, It displayed 10uf from DMM and 8uf from LCR-T4 meter.
I found catalogue of samwha capacitor(samwha-catalogue_3.pdf file), which is attached to this thread,...
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