Hi sr very good video. I have some knowledge about electronics. I’m my case I replaced both lm 324 and op amp. But my power supply won’t go up than 10 volts it go from 0 to 10 but won’t go further. I checked some components and there’s no shorts it’s getting very complicated do you have any idea of what to check. Thanks.
Hi sir i hv a tenma 72 8690 my main cap shows 3300uf 50v but im getting only 20v one side n the other side is correct at 50v. Can i know where do i check to correct this my ha7324a chip shows 1.0volts on all pins on both sides.
I have the same one, it does not reach 30v when turning on it marks consumption of 0.01 and when the maximum voltage is raised it reaches 24v marking consumption of 0.02 it no longer reaches 30v could you help me what could it be thanks
It is almost certainly one of TWO problems. If you look at the back of the PSU near the fan, you will see the upright metal plate with two (or three depending on model) output transistors. If these fail short, you will get full voltage. ALSO if these transistors are ok, then the fault is usually the "driver" transistor on the board (with a black heatsink usually but just follow the wires back from the main output transistors). These power supplies are usually not too hard to fix BUT they DO fail easily enough - so always be a little wary if using them to power something expensive and sensitive. They cannot be (sensibly) trusted to provide (for example) 5v to a £400 device - as if the PSU driver or output stage shorts again, then your little £400 load lets all the magic smoke out. Hope that gives a bit of info - the transistor values are marked on them (they vary according to voltage) but the main ouputs are likely to be 2N3055 or MJ15024G or 2N3773. In your case, the MJ is overkill (intended for the 60V PSUs which can see over 100v on their input), I would guess yours will be the 3055 or the 3773. Not sure what the driver transistor is - but it will almost certainly be printed on it clearly enough.
Thanks. This is a little spin off of my primary channel that has more than 500 video like this, but is in italian .... ruclips.net/user/PierAisa?disable_polymer=true
hello sir, plz give me transformer details in this ps-305d power supply i hv to replace with new one. whenever i give main supply inbuilt fuse is burst, i found transformers input coil is shorted negative and positive line shorted.
I wanted to use the front panel of this supply for volt and amp meter the volt meter is ok but the panel no raading current can you explain me the current panel connection?
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Hi sr very good video. I have some knowledge about electronics. I’m my case I replaced both lm 324 and op amp. But my power supply won’t go up than 10 volts it go from 0 to 10 but won’t go further. I checked some components and there’s no shorts it’s getting very complicated do you have any idea of what to check. Thanks.
I have one of these. When I switch it on the rfi wipes out 40 metres.
can you share the schematic (PS 305 Power Supply 30V 5A ) with part list ,please?
The files are in my portal, but you have to be patreon with $5 tier, th get them. Anyway you can find them on Internet
@@PierAisa Thank you for your answer. I got the schematic.
@@Eng.Mohammad_Al-Fadhli Can you share the schematic?
Great super Pieralessandro...
What regulator Ic used for variable voltage? Lm317 or Lm723?
Hi sir i hv a tenma 72 8690 my main cap shows 3300uf 50v but im getting only 20v one side n the other side is correct at 50v.
Can i know where do i check to correct this my ha7324a chip shows 1.0volts on all pins on both sides.
I have the same one, it does not reach 30v when turning on it marks consumption of 0.01 and when the maximum voltage is raised it reaches 24v marking consumption of 0.02 it no longer reaches 30v could you help me what could it be thanks
Try to replace LM324
I have same problem, LM324N and op amp have been replaced with new ones, but problem still exist, i checking pin 14 on LM324N Its read only 1 volt
Bravou.... moultou buonou... !!! I love your English...!!🥰
ha17741/tl081cp are same?
sir i get 13.7 v on pin no 1 & 14 ,same voltage on pin no 7&8 my current varyable work but voltage not work
plz help to sort it out.
Ho lostesso problema di adrian de la rosa, io arrivo massimo a 12v da cosa può dipendere ? Grazie
V good job Sir thanks very much.
My power supply getting 52v DC output, not able to control by knob, what may be the issue,..?
It is almost certainly one of TWO problems. If you look at the back of the PSU near the fan, you will see the upright metal plate with two (or three depending on model) output transistors. If these fail short, you will get full voltage. ALSO if these transistors are ok, then the fault is usually the "driver" transistor on the board (with a black heatsink usually but just follow the wires back from the main output transistors).
These power supplies are usually not too hard to fix BUT they DO fail easily enough - so always be a little wary if using them to power something expensive and sensitive. They cannot be (sensibly) trusted to provide (for example) 5v to a £400 device - as if the PSU driver or output stage shorts again, then your little £400 load lets all the magic smoke out.
Hope that gives a bit of info - the transistor values are marked on them (they vary according to voltage) but the main ouputs are likely to be 2N3055 or MJ15024G or 2N3773. In your case, the MJ is overkill (intended for the 60V PSUs which can see over 100v on their input), I would guess yours will be the 3055 or the 3773.
Not sure what the driver transistor is - but it will almost certainly be printed on it clearly enough.
I tested on lm 324. And I read on pin #14. 1v It should read about 13 v. Looks that something is wrong other than ic. In my case thanks.
Good information, well presented.
Awesome Guide Thank you!!!
nice
Wonderful it helps me lot thank you .
Thanks. This is a little spin off of my primary channel that has more than 500 video like this, but is in italian .... ruclips.net/user/PierAisa?disable_polymer=true
hello sir, plz give me transformer details in this ps-305d power supply i hv to replace with new one. whenever i give main supply inbuilt fuse is burst, i found transformers input coil is shorted negative and positive line shorted.
Please check tre transformer details here. www.google.com/search?sxsrf=ACYBGNRqY6RCvkRVYIX0aVClU0bCmQ4ZgQ:1578852390160&q=ps-305d+schematic+diagram&tbm=isch&source=univ&client=ms-android-huawei&fir=xuPln4FiCnupZM%253A%252Cc0lwCrAPWKjq5M%252C_%253BeQggOR5tDHtKJM%253A%252C_od1rqyk5bbDOM%252C_%253BVQ5dkxhfH7kOeM%253A%252C846WSwcb5kGFnM%252C_%253BQY5Dd_zXMuvNxM%253A%252Cc0lwCrAPWKjq5M%252C_%253B0_ILTUIIJGG_1M%253A%252Cc0lwCrAPWKjq5M%252C_%253BvqUJANcy8SCQtM%253A%252CD-eDkhIbolc9OM%252C_%253B-n41nRvJ2s8P5M%253A%252CDMQgXTiBFgMDGM%252C_%253BLP_kGHp6S0P43M%253A%252CjIDeHj5fUYU8RM%252C_&usg=AI4_-kSkw38HLU9l5NqF63W7AKfkPhMYIw&sa=X&ved=2ahUKEwjp1vi-0_7mAhXELFAKHSmiBkUQ7Al6BAgIEBc&biw=360&bih=574#imgrc=VQ5dkxhfH7kOeM
Hello, give me a diagram please
Excellent, by the way are you from Kerala.
No I'm based in Italy, this is my first channel ruclips.net/user/PierAisa
Parli ingese meglio di me ma volevo suggerirti di pronunciare led come L.E.D. = "el. i. di." altrimenti significa piombo "lead".
Thank you and sorry for my bad english
@@engineeringsecrets8873 You are very good, and you will improve!
@@DanieleVetrucci Thank you Daniele ! I'll remember you as one of the first commenters, when maybe the channel will become bigger
I am getting 4v on lm324 14pin
Change the Opamp
@@PierAisa my problem is solved thanks but instead of 5amps its outputting 10amps and that is ok to me.
I wanted to use the front panel of this supply for volt and amp meter the volt meter is ok but the panel no raading current can you explain me the current panel connection?
Леле и тук са спестили охладител.Това захранване им е от гадната серия.