ESR value for this cap
Im trying to test some capacitors, but I cant find any chart with the value for 450 volts
this is the one that Im need the ESR 220uf 450v
Thanks...
this is the one that Im need the ESR 220uf 450v
Thanks...
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Re: ESR value for this cap
Is there meant to be a picture with this post - we would need to know the
manufacturer and series of the cap although I believe that high voltage caps
do not have the esr stated as they are considered general purpose.
What was the outcome in this thread can you update.
https://www.badcaps.net/forum/showthread.php?t=22354Last edited by selldoor; 01-10-2013, 10:51 AM.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740 -
Re: ESR value for this cap
Yep,without knowing the brand and the series, we cannot tell.
I use PANASONIC TS-ED seriesNever stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
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Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
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Re: ESR value for this cap
Thank you....
Actually is because of that thread that I'm asking, I had to move, so I put the TV on stand by, now I'm working on it again.
I started testing the ESR of the caps, because just by looking all look fine.
but I cant find a chart for the value for 220uf 450v
Any way the reading that im getting is different in all three, so I'm going to replace them, and see what happens.
Last edited by titodj; 01-10-2013, 11:21 AM.Comment
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Re: ESR value for this cap
It's not unusual for cap mfrs not to specify an ESR or impedance for higher voltage caps. OTOH, they do usually specify a ripple current rating. If you're replacing, 105C parts (or even 85C parts in a reasonable environment) from one of the three "Cons" or Panasonic should be safe choices. Just go for same value, voltage, lead spacing and package size (a few mm shorter is usuaally OK).PeteS in CA
Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
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Laptop is HP Envy x360 13-bf0013dx, hp website link, it's an i7-1250U with 8 gig onboard ram.
Platform: ipa32 la-m024p rev 1b
Originally you'd plug power supply into it and it would take up to 1.2 amps and then drop to 200 milliamps and then go back up again to 1.2, staying all the while at 5 volts. Pressing power button would results in power LED blinking amber 3 times. 3.3 volt rail, 5.1 volt rail present, main power rail 8.8 volts. Power button test pads near EC chip 2.7 volts.
I found a short on the other side:
...10-04-2025, 05:03 PM -
Hi everyone.
I am diagnosing my personal laptop, because it wont power on and no leds light up.
At the dc-in there are 8 pins, 1 and 2 shows healthy 19.66 volts. The next three are ground, but the 6th one shows .283 volts. This is strange to me, it should be 3.3 or 5 or aome volts not 0.283v. As I am new to this, I would like some guidance. Please someone advise me on what to check next.
Oh the boardview and schematics I am using is for a similar model as I cannot find the proper one anywhere. Quanta DA0P5HMB8F1 rev F. Nowhere on the internet.09-23-2025, 12:13 PM -
Hi everyone,
Brought a non functionnal PS5. Apparently only a bad PSU...
No beep, nothing.
After some tests i found this :
- PSU is fine (12 volts stable)
- 12 volts line is shorted
- DA9065 was fried, F7003 also => Replaced both of them, short is gone on 12 volts line, no dead short anywhere else.
- By the way, nothing change. No signal, no power, no beep.
Mesuring all rails with my workbench psu (12 volts input)
- 0.00 amp drawing
- 12 volts, 5 volts, 2 volts, 1,15 volts are presents (suppose new DA9065 do is... -
Good day to all. The bite alarm drains 9-volt Krona batteries. Current consumption when switched on is about 50 mA. I wiped the board from oxides, I will attach a photo (on the board there is a j3y transistor and a 7533 stabilizer, the microcircuit is erased = (the 3.3-volt stabilizer heats up weakly. I replaced it, nothing changed. I unsoldered the microcircuit, the consumption disappeared. The resistance on the pins of the unsoldered microcircuit from the point clockwise is more than 2 megaohms, the 11th leg is presumably ground. I warmed up the microcircuit, the consumption does not change....
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Hello,
Dell Latitude 5420 P137G
Board: LA-K491P REV A01
I have received this laptop which was described as "does not power on or accept charge." Battery shows no sign of charging when charger is plugged in, nor does the board show any signs of life when battery is unplugged and charger is plugged in. No light from the LED at all or any other indications of activity.
Board seems to have no shorts, all power rails are fine and show high resistance.
When charger is plugged in, voltage is present in 3.3V rail but absent in others....
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