is there any substitute for ic TPS51285BRUKR_QFN20_3X3?
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Re: Any substitute for TPS51285BRUKR_QFN20_3X3?
https://www.badcaps.net/forum/showthread.php?t=76936
worth to try -
Re: Any substitute for TPS51285BRUKR_QFN20_3X3?
Replace it with 51225CComment
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Re: Any substitute for TPS51285BRUKR_QFN20_3X3?
sir so nice of you, thank youComment
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Re: Any substitute for TPS51285BRUKR_QFN20_3X3?
Sir if we replace it with such ic (like TPS51225RUKR) which has only 3v Ldo always-on, what can be happenLast edited by usyusy; 07-29-2022, 09:38 AM.Comment
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Dear members,
I have a linear variable power supply with unknown brand name that I used for voltage injection.
Then it failed. I discovered that its transistors (Q1 and Q2) are shorted.
In addition, I discovered that its zener diodes are defective.
I can replace the burned transistors.
But I do not know the model of the zener diodes. the model number is not marked on the zener diodes.
Therefore, I cannot replace the zener diodes.
I do not want to test the zener diodes in a test circuit to discover their model or value.
no schematics are available... -
When I tried to repair LG 29 inch CRT TV, I found that the ESR value of samyoung SMS capacitor(160v 2.2uf), which is very close to D1879 transistor, is 6 ohm.
Judging from above ESR Meter Table,I think It is necessary to replace this sms capacitor.So I visited local electronics shop,and I purchased 160v 2.2uf rubycon YK capacitor.
But when I browse through rubycon YK datasheet,I found that there is no ripple current rating for 160v 2.2uf specification. But On the contrary, I found 39 mA ripple current rating for 160v 2.2uf SMS capacitor.
Rubycon YK DataSheet (b... -
I've just been repairing some (very) old speakers with a loud hum that occurred as soon as you powered them on regardless if any actual audio is played through them. I work in a School so it's 99% likey that the Teachers have hardly ever turned the power off on them for well over 10+ years.
As you can see the top large capacitor on the right has a bulge on the top so defincately needs replacing. As the one next to it is exactly the same capacity and voltage I planned to replace them both.
What is your advice/opinion on whether or not on old(er)... -
Hello again Community
Anyone verse on how you go about choosing a substitute mainboard for your TV repair. Like the chap in the video below sometimes a 1:1 replacement board is too expensive and reballing a mainchip(s) maybe outside of your skillset
. In the video the poster states one needs to match the replacement board with the SMPS, T-con (if not built in) and panel (and substitute cabling be also be required).
I'm very interested in choosing a suitable replacement board for any model or make of TV and the general (or detailed if your willing) step this entails....03-23-2024, 02:55 AM -
I have purchased an 100-240v AC/5v 2a DC adaptor from aliexpress,and a month ago It smelled burning when I plugin it powerstrip.
Since then, This AC/DC adaptor have been out of order.
But A few days ago,I replace 0.5 watt resistor with 1 watt resistor(1ohm) in this adapter.
After replacing resistor,It succeed to recharge all of android phone.And When I measure voltage on the two pins of USB port,It shows 5.5v
Is it okay to replace 1/2 watt resistor with 1 watt resistor in AC/DC adapter?
And Is there any possibility that it will suddenly explode as well as to be out...
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