My power supply............
ฝัง
- เผยแพร่เมื่อ 11 มิ.ย. 2024
- Ebay store: www.ebay.co.uk/usr/sorinelect...
WebSite: sorinelectronics.com/
Patreon support: / electronicsrepairschool
TH-cam Members: / @electronicsrepairschool
Forum: forum.sorinelectronics.com/
Discord: www.sorinelectronics.com/discord
My tools: www.amazon.co.uk/shop/electro...
PayPal me: www.paypal.com/paypalme/Elect...
Hi Sorin. For cleaning a potentiometer or a fader a Deoxit F5 and afterwards Deoxit F100 for better contact and lubrication works often like a miracle and if the actual track is not destroyed it will fix it. Saved me many times. For any other contacts cleaning a Deoxit D5 and D100 can be used. Hopefully it will help.
i will swap it or put the metal thing back just because maybe sometimes you need low current and by mistake you will push 5 amps when trying to go to the lowest current point SO yes i will swap it
Yes, I see that as a big danger. He will turn it down to real low amps, and suddenly hit max amps.
You need potentiometer 10K. B mark should be linear resistance change of resistance when you turn the angle. You can see this mark on front side of part.
Indeed, the carbon track will get dirty quickly again. Also the cap is pulling everything together so contact runner will put some more pressure on it.
I was recommended zippo lighter fluid to clean potentiometers.
I was told to just apply on them, and it will sock in, and clean it while you simple rotate it.
I was sceptical because it is flammable liquid, but it had worked on many instances with no issues.
Uh, those pots have a small cutout on the side. Spray deoxit or contact cleaner in and rotate for 30 seconds. Super easy. Then you can measure them to make sure they dont have dead spots. That can also be an issue, but you need an analog Ohm meter.
Two years ago, I came across three power supply devices that the owner of the maintenance center had abandoned for this reason, and they were suffering from the same problem. This is due to the frequent use of this particular resistor (a consumable reason).
You don't need to open the potentiometer, just spray some contact cleaner.
Some are sealed and have not a little hole for contact cleaner...you have to open them as they are SEALED
I'm using disc brake cleaner spray for cleaning the potentiometer... it's a very good cleaner.. works every time 👍
You fixed again, Well done, Thanks for video Sorin!
I got one PS like that one and it started failing in the same way. Thanks for the tips, Sorin!
always love your videos thank you for your time and content
Buy high quality wire wound ones and replace the carbon ones.
Proper hot glued camera😂
I love da way u teaching sir
Im from Philippines
God bless us
The front of the potentiometers have a B10k, you need 10k linear pots.
Since the mid 60s, I have always used cigarette lighter fluid to clean the pots. Do not take it apart just squirt it in and work the pot.
That's very interesting, which one, the compressed air can type??
You can get a bit more Amps when you remove the stop, so the potentiometer turns a bit more.
But is it good to have the wipers go out over the metal?
Maybe the wipers will be damaged and then the carbon tracks will be damaged as well?
Maybe?
usually potenciometers have a little hole to use contact cleaner spray
Hi Sorin ! I have the same power supply. Potentiometers are very low quality. I had a similar issue in the voltage regulation . I clean potentiometers and work for a while . Better solution to replace all of them with high quality .
i have same issue with voltage, replace potentiometers but after few times on/off, issue comeback, can u sshare link order high quality potentiometers?
It is indeed better to replace these trinkets with high quality potentiometers, then you will enjoy them for a lifetime. I always do this and it is not that expensive.
@@Professorkecan u share link to ỏder?
@@VanDuc1126 The system does not allow sharing.
@@waynesallee-comhow about keyword to search?
Nobody is going to teach the following companies how to build:
a) a DMM (digital multimeter) to Fluke
b) a oscilloscope to Tektronix
c) a soldering station to Weller ...
Analogously to Allen Bradley (founded in 1903) and Clarostat (today Honeywell founded in 1906) how to make potentiometers.
Allen Bradley sold its commercial components division to Adafruit (which builds the original Hakko soldering stations). Another way of saying it; in mouser write: adafruit 10K potentiometers and choose the linear type, very economical by the way. All the best.
Nice one Sorin!
Given you use the thing all day, it might be a good idea to install a high quality potentiometer, like a bourns PDA-24
I have a power supply where I've cut the fan wire and connected a bimetal switch set to around 50°C in between.
The switch is now sitting between the fins of the worst ventilated part's heatsink.
And so... when the hottest part gets warm, only then does the fan get power.
When I am just messing around, everything is silent.
When I charge batteries I don't have to think about turning on the fan. It just happens.
Nice fix but I wouldn't recommend you use it like that where it can turn around freely... if you have it set to a very low current to protect your circuit, and accidentally slip or go a little further, suddenly you get the full 5 amps into whatever you have connected...
I agree with other commenters, the potentiometer is probably worn out from a lot of use, better to replace it with a higher quality one.
I've a couple MLINK DPS3005 (same as KORAD KD3005D and RS RS3005D but much cheaper) and those use two rotary encoders and the settings can be locked.
I bought them 4 years ago for €40 each, now they cost €60.50 in Spain... I've no idea if those are available in other countries.
Note: The MLINK DPS3005 It's not the same as the generic DPS3005 buck converter module with LCD screen or DPS3005 power supplies from another manufacturers that are the same as the one in this video.
I replaced the fan on my unit with 12v noctua fan that has a good airflow but since the original fan runs at 24v (27v measured) and since i don't have a buck converter i just placed a 12v dc adapter (rectangular shape) to power the fan inside the unit secure it with a double sided tape and connected it to the mains of the psu switch now the psu is very quiet
I built myself a cheap switching power supply using a xys3580 works 100% it dosent have the clicking sond from the relay like my other one but it has a real-time power graph so I can see the spike..
have the same power supply problem with volatage regulation voltage jumping way to far when touch a little
DEOXIT
DN5 is very good for contact cleaning
Hi Sorin.I did order a linear one but i get a swiching power supply and what is the downside of it.I will upgrade the heatsink and add one on the bridgerectifier?
25:01 put thermal pads on the heatsink, a veeeery thick layer of thermal pads on the back of the heatsink ☺👍
"Proper nice mate!" 😂
I used to repaired amplifiers, and I came to the conclusion that they arent fixable, only temporary. So Im always replaceing then
LOL the video shows that it was uploaded 7 hours ago, and yet your post shows that it was posted 3 weeks ago. @SkyDown15
Please show us how to REMOVE THE SHORT PROTECTION ?
Thanks Sorin.
PeaceFromOz😊
Hi Sorin,
I remember that your bench PSU came without current protection, and you were about to tell us how to remove it but this one was already disable.
So, How you remove current protection on bench psu ?
FOLLOWING !!!!
Thank You,
Whatever happened to those wool boards they used to put in the dial knob you know the white ones that were there to clean the tracks as you turned the knob i can't remember what they called them but thats what i would use to help keep it clean.
Why didn't you put the potentiometer cover back?
I have same one with other name. I am just learing to use it. I am seeing ur videos all these days and thought the power supply u were using was connected to some hdmi video digitally showing on video. Hope you some day give knowledge to use this power supply in basic too.
Insert a high value resistor under the potentiometer when it starts to lose conductivity!
This same happened with my smd rework station
Did you ever do the removal/bypass of the SHORT CIRCUIT PROTECTION of a power supply?
✌️
You should have a ultrasound cleaner for that use
Thank you for the video. Could you show us your USB-C/charging wiring in more details? I often wondered how you use your power supply to deliver the 19V through the USB-C.
Hi, if you check the video description, there is a amazon list and the charging port adapters are there. All i did is to cut down the usb-c end and use red and black wires and connect them to my power supply.
@@electronicsrepairschool Not in the description :)
I would disassemble the potentiometer and bend the tiny pieces of metal to force them to make better contact.
12:25 Sounds like it comes from PC, cell phone...manufacturers, but with Sorin everything gets a longer life. In this way we also protect the climate a little!
Use yellow wd 40 special contact cleaner
Hi. bps-805 is no more available. Any suggestion for a recent linear power supply to buy? thx a lot
Yup, hate getting rid of stuff I’m use to and like. Like anything else, fit it
Interesting how they mounted the heatsink and fan in what seems like the most inefficient way you could imagine... My Power supply has the heatsink mounted the other way outside the case and no fan needed, but it's from the 90s common sense was still a thing ;-) ...
sorin added the heatsink
Deoxit can help with this potentiometers
Hi, I would appreciate your help. I have something similar to this. I replaced all the potentiometers because they broke, and since then, instead of 5, it only reaches 4, and I replaced it according to the OAM that is written on it, what could be the problem
Replace it with a non carbon one but with a copper one it's always better when it comes to changeable resisters
Edit: thank GOD it worked better than ever and I'm glad that you showed us how to modify and *you working and fixing your own supplies not just the power supply* and i wish if you showed us your whole tools kit and thank anyways. Bye
Sorin good morninh.Waithing a long time video like this a have same power supply and same issue😢😢
Same strategy to fix the cam to the power supply: Hot Glue. :D
Where is the solder comming from so fast onto the soldering iron?
Hello. And old Shcooll leason use a 4b or 6b pencil and regraphthe surface with it just painting.
Sorin those are B10k 10K linear pots.
A drop of diesel works wonders. Clean and lubricate well.
carbon build up maybe spray with electrical cleaner or at a push carb spray or replace
Hi Sorin, can you show us how to disable short circuit protection on linear power supply
catch a very fine grit of sand paper on the metal latch to drag it around
I would replace it to see if it were the problem or the circuit board.
Electronic cleaner spray or deoxit works for me
Hello Sorin, can you make a video about how to remove the protection of a circuit when you plug to charge you can not use the product( ex a torch when i charge it i can not turn on the led)
A little bit of WD40 should do the trick. I used it for potentiometer and it works just fine now.
carbon strip can dissolve
@victimovtalent6036 yep ..best just to use isoprop.
Sometimes the connection between the pins and the poti-pcb give up
Change potentiometer from button that you use less to that :)
The wiper on the POT looked fine, did i notice the relay is not clicking also? I thnk the relay might be suspect?
The relays are clicking, otherwise it will not switch the voltage up and down
@@electronicsrepairschool Ok, i could not hear, the relays are mechanical also, spring can get old or as another member mentioned the relay could "Arc", which could happen if Zener at the relay failed? I am just going on basics of what i know, am not at your level by any mean's, it must be a real puzzler then, thanks for reply Sorin
If will be a relay, i will have problem with less current also, but yeah, can be a faulty relay
After seeing the contacts at 12:39, I say replace it. Just make sure it's the same resistance.
Cu WD 40 rezolvai problema, nici nu trebuia desfăcut potențiometru...
Please let me know you set"No short circuit protection " Shout hava or its defect your?Please let me know
no one is selling the linear power supply now some on ebay but not lavolta but looks the same
Couldn't you put the metal cap back on?
Deoxit should be in your kit
before watching further i will say its the trimer pot.
Today we have a niiiiiiiice lap, wait a moment, niiiiice power supply XDXD
My ad blocker off only for Sorin's channel 🙂
I first wondered why Sorin is dicking around with an $80 China garbage bench power supply...
Then I realized: class is in session
Inception right here lol
Hi Sorin , Like the Idea of the large heat sink did you remove it for some sort of equipment regards Jim
I remember i bought large heat sinks from ebay on some point www.ebay.co.uk/sch/i.html?_nkw=large+heat+sink&_sop=12
That is interesting made in England.
The same problem im dealing last night sameee hahaha i cant believe it 😂😂😂
hi old school man just buy a bunch of potentionmeter! very cheap😅
Maybe The label made in England !!!
Thats dodgy 🤣🤣🤣
sorin be carful now it"s a dangerous power supply .cs from 0 amps u can go straight to 5 amps if u turn the wrong way. that could kill lot off components .u should change that potentiometer. good luck
I stopped my UBlock Origin just for u :D.
I dont watch tv because of adds, and using addon same reason.
Maybe you should get rite of those cheap potentiometers and replace them with some better standard
Hey I have the same power supply why is there a capacitor across the earth and ground ?
Made in England?? :) Maybe the sticker
Pot pot pot and kettle.they used the cheapest pot they could find. Replace with Ferrari pots.
I would put back that metal casing on the potenciometer only for 1 reason....in case you are starting working and maybe you forget to check the amps, you can unleash 5amps on something by mistake ..meanwhile, if you reset by default the knob on the "Min" current position, you are sure to start from low amps
Spray it with a contact cleaner i think it will clean it
un model tot liniar dar complet digital ar fi bun
Link xour other channel pls. Its xalled lapto repairs i think.
Deoxit
Us a load tester your burning up your tweezers.
Inainte le reparam cu un creion cu mina moale 😅
Маю такий самий блок живлення 1 в 1. мій виготовлений в КНР.