EP45 The DC Power Supply | How do I turn my device on with a DCPS? | What is Operational Voltage?

[@RepairLab]

Worth mentioning that if the cable you are using doesn't have a battery-like circuit so as to communicate with the battery sense circuit of the device then the phone will reboot itself after a while. Good video Justin!

[@TheArtofRepair]

Very true, this is especially common on newer LG devices, some will not even boot up without the battery sense.

[@pr0xZen]

Just be really careful, and strip that whole board from the old (battery) when a customer comes in for replacement. Then you can make your own cable with the full coms package on board.

[@technolucas3720]

I like your videos before I even finish watching them, keep it up! I like your style. You and Jason from STS are my favs......if your taking requests I wouldn't mind some more tips on hot air station use (maybe even some ipbox v2 stuff if you don't mind)

[@TheArtofRepair]

There will actually be some hot air videos, emmc reader and iPbox2 videos sometime soon. Thank you btw! im always glad to hear what people think of my channel! Im always taking requests. If possible I always try to do requests over other ideas unless they are planned in a series down the road.

[@inforenovo837]

hell yeah!!!!!!!! i need it this so bad :D Thanks Justin (Y)

[@TheArtofRepair]

Yea you do! Now that you got your DCPS its time to start using it bro!

[@ononujucaleb2529]

Nice one but how can one use the dc to diagnose a phone that is short

[@bomomobilerepairer]

great video.... nice bro

[@TheArtofRepair]

Right on dude, appreciate you taking the time to comment on the video =) Hope to see you around again soon!

[@othmanoasri7882]

Hi Sir , I like to know how test Samsung note 5 model device with DC power supply . Hope you can answer as soon as possible . Good student from Malaysia

[@TheArtofRepair]

Might be best to just attach power leads to battery flex and then to board, =)

[@proudofthe3211]

I want to get into phone repair. I knew nothing about it. I'm starting by watching ALL your videos. Eventually I will purchase everything you sell and recommend. I look at your videos as scientific explanations 👍

[@navinharbajan333]

Battery life is usually a variable or .2v it should power with as little as 3.6 but it'll be about 1% battery or maybe only initialize iboot stage 1.... from my experience but I've not used se's or 7's

[@TheArtofRepair]

Correct, but at 3.6ish its possible to start to see diminished functionality. That's why I said to operate smoothly =). Thanks for taking the time to comment!

[@navinharbajan333]

TheArtofRepair thanks for the reply always love the pointers in your videos

[@BradGanley]

Just to add a bit of clarity, the voltage displayed on the battery is the average voltage of the battery. Processor functionality scales linearly with input voltage. Any single lithium cell has a charging maximum voltage of around 4.3 and a maximum (safe) cell voltage of 4.2 and typically a minimum of 3.3V (before low power begins damaging the cell). The battery percentage is determined by the phone sensing the current voltage of the battery and "0%" on the phone can vary from device to device.

[@Ivar1231]

Lmao I wish I found this vid last night... I injected 5v and 1 amp to my iPhone XR... I blew that bitch up

[@obahanaygun6382]

hey what gloves are you using

[@eniac22]

★ 100x 3mil Black Nitrile Gloves ● amzn.to/2fkahYK ★ 1000x 3mil Black Nitrile Gloves ● amzn.to/2f6oeVk

[@TheArtofRepair]

They are linked in the description =)

[@TheArtofRepair]

Thank you!

[@_B_K_]

I found my decade-old phone (Samsung SPH-A900) in our garage and it had a puffy battery. Found a service manual for it and it was between 4.2 and 5.6, even though the battery was a 3.7V Li-Po. I started off with 3.7 and noticed that the device was barely usable. So, I careful kept raising the voltage until I was at about 4.5 and device began working very well. The point of this story is that you should find a service manual and if you run into the same issue as I with the operating voltage obtained from a battery, you might have to raise it to the actual operating range. By the way, if anyone knows why the battery was 3.7V for a 4.2-5.6V phone, let me know.

[@eddiegomez1905]

Good morning! i've been watching your videos and are very nicely explained. is there any way you can help me to connect this android screen using the harness that came with it and using a DC power supply? i want to test it and download some apps and software before i put it in my car. bellow are a couple pictures. thank you so very much in advance. IMG_2318.jpeg IMG_2319.jpeg IMG_2320.jpeg

[@pr0xZen]

I understand the sentiment, but IMO you're underplaying the importance of _current limit_ on the power supply. I would suggest the overwhelming majority of times a bench-top power supply is used/needed to power a device, _are explicitly_ diagnostic situations. And your format and language here, appears to target beginners, so being clear about what it means, is IMO extra important. My own advice to learning beginners, as a supplement to the good info in the video: 1st, try googling for the nominal or maximum current draw from the internal battery. For example; _Device XYZ battery +"max current"_ 2nd, if you cannot find anything useful, look at the *original(!)* charger, or an official quickcharger. Find the output current of that, add 30-50%. This is in most cases a safe range. If sympthoms include the device is not booting with a known good battery, or feels abnormally hot, try setting current limit to something reasonable. For a phone, that would commonly be 2 ish amps. If the device has a short, this limit level should in most cases reveal that through the current draw being pegged at a high current or at your set limit. It should also avoid accidentally causing further damage, if disconnected within reasonable time. Pretty much all modern batteries have build-in over-current protection. If the short in your device is bad enough, it may trip that protection in the battery, avoiding substantial damage. But when powering that device with an external power supply instead, that protection is gone, and you have the power supply current limit in its place. If ie. the over-current protection inside the battery flips at ie. 2.5A, but your power supply has the current limit set to ie. 5A - that short could now potentially cause it to draw 5A instead and severely damage components, pads or traces that were able to survive the 2.5A short.

[@zomaardan]

I just got a dcps last night. 3ah 30volt lineair. From 1973 Philips PE1512. I just need leads then i can start to play with this. I dont know if i can see what current or volt is used but only what the setting is atm. Anyways im really happy with this new tool. This channel deserves way more views mr youtube.

[@TTT-V]

so good at teaching~!

[@TheArtofRepair]

I appreciate all your positive comments ! =)

[@svetozar161]

4.1 вольт ставишь и все работает

[@mohamedwaellabidi3780]

best video about phone

[@diaryibrahim2611]

♥️♥️♥️ best

[@nurseboy]

I've only been watching your videos 1 day and learnt so much that was foreign to me. Thankyou

[@johnervincapul6232]

Very informative , everything that i seek for an answer is here! Thank you very much You're a good teacher

[@shamirik_]

ur good teacher i wonder why i dint know this channel all years

[@SyndicateIsTheBest1]

hey justin something no one else has done proper video on, pink line on s7 edge screens, where pushing on the top the line disappears, i would guess a bit of heat using press soldering bit would be a permanent fix .. your thoughts? itll get a shitload of views...

[@TheArtofRepair]

Only problem is i need people to send me tons of these pinkies to do testing. So if anyone reads this and has a few laying around. Contact me on Reddit or Instagram and send them over and ill do some testing and make a video if I can confirm a fix.

[@raulmorel1872]

Good video

[@omarcitovr2314]

thanks man ,I bought the power supply from your links ,I receive it, than I was ok now what ? this really helps .

[@TheArtofRepair]

No worries brother, there are more videos on the way. Just keep watching =)

[@rigoleyja4043]

Hi im barely learning how use a DC Power supply . I have the one that has the 2 knob current and 2 knob voltage. I seen others putting the 2 gator tips together to it short it for the current to set at 2 amps. Do i have to it that way too ? I work on iphones.

[@TheArtofRepair]

Uh, I’m curious why your trying to run two rails together for an iPhone job.. what’s the specs on your DCPS?

[@rigoleyja4043]

OW DCPS input 110 V output 0-30V 0-5A DC. On current i shorted with the 2 gators or probes putting the red and black together to adjust 2amps. The voltage i adjust to 3.81 as the battery of iphone 7 says. It turns the apple logo on but cuts off doesn't turn phone on .

[@rigoleyja4043]

When i go to plugging the battery it turns on. Its a working phone im just trying to practice without the battery. Do i have to worried about something blowing up in my face or getting shocked ? You can tell i never used a DC Power supply.

[@TheArtofRepair]

@@rigoleyja4043 if you follow this video you should be able to do this. 4v isn’t going to hurt you really. I would recommend you pick up the correct battery clips to attach it to the board and then you should be fine following the video? As long as you can generate atleast 3amps your fine

[@rigoleyja4043]

I think i know where im getting you confused . when i make the adjustments with the 2 gator or probes i pulled those cables out . then i put in the cables for the i boot cable all in one for iPhone battery . But i will watch the video .

[@JAYRAY00]

But your machine only had 1 decimal place, so 3.8 is fine, but what about if your battery says 3.82V..? Go 3.8 or 3.9?

[@TheArtofRepair]

I round up or down, so 3.82v would round down to 3.8 and if it was 3.5+v i would do 4.0. But not having the 2nd decimal has never stopped me =)

[@spartan456]

JayRay00 generally speaking, voltage itself is never constant. it's almost always fluctuating within a 3% margin of error around the desired point. the 3.8v is the "optimal" voltage aka nominal voltage. This voltage will vary from device to device. some batteries may have a nominal of 3.6 while others are 3.8. in the case of batteries, the nominal is halfway between fully charged and fully discharged. 3.8v is a fairly safe voltage to use when dealing with phones. even if it's a battery on the lower end of the nominal spectrum the device will still accept 3.8v and work fine.

[@robertcalkjr.8325]

Thanks Justin! It is still good to set the current on the power supply so that if something goes wrong or shorts, the current is limited.

[@TheArtofRepair]

Usualy if i notice a high grab like that, i just hit the power and, inspect, then use the higher current for a quick short search XD but yours is 100% a valid method as well =D

[@robertcalkjr.8325]

I use my Isolation Transformer like that for devices that plug into mains power also. Always good to learn different methods!

[@richardduque5168]

Very interesting and inspiring lesson.

[@TheArtofRepair]

I appreciate the view and the comment! I hope you keep watching and learning. =)

[@thomaskaniouras6079]

why dc power supply then got another rotor to set Ampere? where i will need that?

[@TheArtofRepair]

From my understanding of your question, your asking about the second knob that controls amps. That knob sets maximum amps OUT. Meaning if you know that more than 1 amp will cause damage, you can turn the knob 1/3rd the way and LIMIT the amount of amperage out before it "shorts" I generally keep mine halfway turned up so that it doesn't cross 1.5 amps into the device. Some people prefer a hard 1 amp to make sure they are safe.

[@thomaskaniouras6079]

TheArtofRepair thanks for quick responce.. so if the battery is 1900mAh i can turn it to 1.9 and i will be safe?

[@TheArtofRepair]

1900mah is the max capacity of the battery. 1.9amps on the turn knob just means that if the device needs to pull that much, the DCPS will allow it. The amps-in knob it just a current limiter. That's why I was saying its not as importance as getting the voltage correct. =)

[@waynetaylor2784]

nice video justin

[@TheArtofRepair]

Mr Wayne Taylor, always up front. I love it. Thanks for watching!

[@waynetaylor2784]

lol its 2am here in perth western Australia only up watching ya video..😎