Dead phone Troubleshoot 💯 Dubble Power +Testing+Repair+Schematics Diagram knowledge Pm7150/7150L.

Dubble power ic(2 power ic)Boot sequence+Testing+Repair+Schematics Diagram knowledge 💯.Pm7150/7150L.Power ic Testing.How to troubleshoot power ic.what is Power ic how to check power Ic.what is Buck circuit how buck circuit work.Cpu voltages.Spmi protocol.what is sys oky line.what B.o.B voltage each every line detail with schematics Diagram
CELL PHONE REPAIRING.HOW TO READ SCHEMATICS .HOW TO READ DIAGRAM.ANDROIAD & IOS PHONE REPAIR.
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How to repair Dead phone with Double power ic

[@danielnorman2350]

Hi sir thanks so much for this wonderful video am watching you from Ghana 🇬🇭

[@andualem-qn4xl]

I am watching your videos from Ethiopia. Thank you very much for your kindness, and I wish to get your premium videos. Really badly, 🙏🙏🙏

[@sebisbelera8846]

B/ce when we plug in charger vph is produced .if vph power is produce seconder line is produced...

[@samsonmanda3203]

You the best❤

[@kapildas8620]

Deep knowledge sir

[@technical5880]

am going to watch all your vids in the name of allah, good chip level repair courses. thanks.

[@phoneschematicseducation]

Glad you like them!

[@alexfahad1139]

when connect charger DC to DC ic make vph voltage then power ic make buck and ldo voltage

[@chandraKusum-jv6tt]

Very informative tutorials. Learnt lots of things by watching your video series. To answer the question, there might be short in battery line means short between battery connector and charging ic or line disconnection between battery pin and charging ic or battery id line issue. fails to create divider circuit. Once the battery connect, battery id line should get 0.9v. If not getting the 0.9v CPU not detect the battery connected. So buck voltages will not generate. Once charger connects cc1 / cc2 lines will activate with charging ic, CPU reads the info through sdlc and sdac then vph generates through the vbus line,power ic enables the buck voltages.

[@jaswinderSingh-yt5bf]

When charger connect with phone then dm, dp lines sense cpu and charging ic also switching the voltage through we know from boot cap and vph from coil and charging section active in power ic, so buck voltage produce power ic when charger connected and without battery no charging section active in power ic only vph line is active and goes to power ic when we press power button then voltage ground and powee ic active then produce buck voltage that i know but you are master of this line i am not and i am 57yrs old and you are master and genius person of this line from my side God bless you 🙏

[@phoneschematicseducation]

Thanks for Answering sir..u almost there but..My questions was why the circuit design like this.why PM ic enable secondary line..how the circuit works I am not asking this....You Teach m new lesson sir.. Learning is important.Age is just a number... Thankyou so much sir You Motivate me

[@gangadasuresh-dn2ok]

@@phoneschematicseducationsir but dp dm line missing also mobile just showing logo.

[@matthewluzung122]

Thank you for new upload brother, please keep it up! I'm from Philippines!

[@phoneschematicseducation]

Thanks for watching!. brother

[@TechnologiesSysteme]

Because the charger VBus enters the DC TO DC, the PMID confirms that the 5V of the VBUS are really present, the DC TO DC activates the VPH from the bistrack. The HPV enters the PMIC and the DC TO DC also sends the VSYS OK which allows the PMIC to create the Buck Voltage and LDO Voltage. If the phone is dead the DC TO DC cannot create the HPV and the VSYS OK, for this lesson it is the Fault N which allows the second PMIC to create the buck and the LDO

[@phoneschematicseducation]

U tell me the process but my question is why pm generate secondary lines

[@rajeshraju1392]

Sir good knowledge ❤❤good teaching

[@phoneschematicseducation]

Thanks and welcome

[@kingtalib6447]

You are doing a wonderful job sir please keep it up

[@phoneschematicseducation]

Thank you, I will

[@KhanKhan-cf9gj]

Sir maybe vbat miss from dc to dc that's why if you plug charger you get Secendery supply if you connect battery 🔋 and press power maybe vbat miss or power botton problem

[@fighterzone2337]

Bro i am from Bangladesh.... Keep your video in English. It follow international standard. Love from Bangladesh ❤

[@phoneschematicseducation]

💯 brother.keep watching.

[@MaheshIndunil-zt6js]

Hi good stuff. I believe when the battry connects, there will be an issue on the battry id line. Once power button press that's why it does not generate the buck voltages. Once connect the charger vbus line will activate and power ic generates the buck voltages. Once usb connects the charging symbol has to show on display. So phone has to do some work I mean for example power shoud go to display, cpu has to do some calculation to show precentage, ram should founction, for that reson every componets should recive the voltages that is why when connect charger buck voltages will generate.

[@phoneschematicseducation]

Nope..watch the 2 Lesson of this topic

[@MaheshIndunil-zt6js]

Thank you, got the points from lesson 2

[@jaswinderSingh-yt5bf]

You are genius and keep it up 👍

[@phoneschematicseducation]

I am not genius sir..But try to learn something new..

[@StoryFBMizostory]

To the question according to the bq ic tutorial. It's because of power good line, this line active only when charger is connected.

[@phoneschematicseducation]

Thanks for the Answer.But my question was why pm ic enable secondary line.why circuit design like this..you r also right circuit work like this.but why

[@StoryFBMizostory]

@@phoneschematicseducation thank you for reply, let me try again, i think it is because battery voltage is not specific sometime 4.2 sometime only 3.2, for safety reason the power ic dont release these ldo or boot voltage because insufficent power can cause damage to the component...

[@phoneschematicseducation]

@@StoryFBMizostory nope

[@sunshineemagbor7549]

Great video sir. The reason why it will generate bulk and LDOs voltages when plug in charge but no voltages when power button is pressed, is because the vbus produces direct current while the battery will only produce direct current when the Dc-Dc ic and pm ic are okay.

[@phoneschematicseducation]

First Thanks for the Answer.But my question is that why power ic enable the secondry line after the charger plugin.I am not asking how circuit works..why circuit design like this.

[@humphreysmphoka6448]

This is a deep knowledge,, sometimes VBAT cannot activate Bulk and LDO because it is protected by divider circuit but Vbus is direct... VBAT requires power ON

[@phoneschematicseducation]

Watch the video again.

[@farshardmohamed8519]

One of Faults there is disconnection to battery line to charging IC so when battery is installed charging ic dont have input voltage to generate vph so when connect to charger its works correct me if im wrong great content keep up

[@phoneschematicseducation]

Nope

[@sakthistudio3408]

Sir realy i dont know the answer for that question...... I am very interest for know this amswer.... And one more request.... Dont speak fastly..... I cant not understand sir.... Just speaak slowly.... Thank u sir.... Congrats for ur work.... U are a mentor....❤

[@phoneschematicseducation]

Thanks

[@StoryFBMizostory]

when can we expecting secondary line short solution?

[@phoneschematicseducation]

Wait for some time brother.After the secondry part A surprise for you

[@brainboxtech5059]

Great content. Please my Borneo schematic v7 13 patch compatible search is not working. What do i do boss? Any guideline will be much appreciated

[@phoneschematicseducation]

Restart pc Check Date&Time Means clock setting Install again Contact Borneo customer care.

[@sakthistudio3408]

Power ic generated secondary lines because all the ldo sections are control by power ic....

[@phoneschematicseducation]

Right bt why pm generate secondary lines,ldo.or buck section

[@mubarak1634]

Maybe EDL point shorting that why pm ic get some voltage through to the vph line? 🤔🤔

[@phoneschematicseducation]

Nope

[@mubarak1634]

@@phoneschematicseducation then right answer?

[@mubarak1634]

@@phoneschematicseducation then right answer is?

[@phoneschematicseducation]

Watch the 2nd lesson 2 Power ic topic . Answer ±More knowledge

[@sakthistudio3408]

Dp dm line in fix in cc connector..... Its go to cpu... Cpu sense or check (power ic out put lines ) Vbat line la not fix dp and dm

[@phoneschematicseducation]

Nope

[@phalaw4915]

When charger connect power ic switch Bucks and ldo volts through power good signal from charging ic or Bq ic

[@phoneschematicseducation]

Thanks for the answer.you r right bt..I am not asking this.My questions was why pm ic enable the secondry line after charger plugin.why circuit design like this

[@kingtalib6447]

I think it because there's problem in the vbat line or the vbat line is shorting.

[@phoneschematicseducation]

No.. watch the video again

[@Godunjoify]

Probably battery is blocked for safety to not get drained.

[@phoneschematicseducation]

Nope

[@AshwaniKumar-zk3ml]

Power key circuit faulty

[@phoneschematicseducation]

No. watch again videos

[@Savedoff-qo5ei]

I’m watching the video through a translator and perhaps I misunderstood the question, if you asked why the phone won’t turn on when the battery is low, but if you connect the charging cable it will work, I think that to turn on the power ic you need a voltage of 3.7-4.2 and if the battery is low it won’t work, and when we connect the charging cable, the inductor on the vph line, through the generation of a PWM signal from the charging chip, will grow from 3.7 to 4.2 and then the power ic will be able to turn on additional lines if I wrote it wrong, tell me

[@phoneschematicseducation]

My question is why pm generate secondary lines buck or l.d.o section.. read the other comments u will better understand.what was my question

[@Savedoff-qo5ei]

when we connect charging, pm creates voltage for the central processor and other components associated with charging, so that the processor turns on charging the battery and everything connected with it, fast charging or normal, and displays it on the display If I didn't understand the question correctly, forgive me

[@saved0ff]

I'm writing through a translator so something might be wrong

[@phoneschematicseducation]

@@saved0ff buddy someone already give this answer.now 2nd thing u said pwm signal on charging chip something in previous comment.can u tell pmw line work.according to.how this line disable the secondary line or not activated pm

[@Savedoff-qo5ei]

@@phoneschematicseducation I don't know the answer to this

[@soulfreeuchendu]

Vbus makes vph and the vbat doesn't because the vbat side of the dc2dc ic is faulty (faulty dc2dc ic)

[@phoneschematicseducation]

No

[@gangadasuresh-dn2ok]

charger I'd line detected cpu active power button line(1.8v) tracking was missing or power ic to charging ic ka tracking missing...check battery connector gr value missing or battery strip cutting or power button cutting.. check

[@phoneschematicseducation]

No..watch the video again

[@vijaychari6042]

When a charger is connected we get always 5v . And the pcb is designed always on for charging section, vph + system ok generated so pm gets activated, but when battery inserted, 1st condition it must be charged to certain level to activate vph, then dctodc ic should detect or sense battery through thermal and id lines, if the voltage level is ok then it produces vph ,power on voltage generated and when pressed sy ok sent, then pm gets activated and secondary voltages generated

[@phoneschematicseducation]

U almost there brother bt why circuit design like this.why pm enable secondary line after charger plugin

[@vijaychari6042]

​@@phoneschematicseducationnow this next question is beyond my syllabus,whatever available on KZbin I am grasping, now eagerly waiting to know from you sir, thank you for your good initiative.

[@vijaychari6042]

May be to load software it is designed by manufacturer in all ready to connect position

[@pnoechie21]

I guess, the cpu memory rtc battery needs a always supply voltage. So when the charger plugs in, it gives a secondary voltages 😊

[@vijaychari6042]

When a charger is inserted in battery drowned set ,to show that it is now charging,or not charging, or to indicate any message it should come in to action for that all functions of the set should work so for that pm activates cpu ,emmc,by powering them, otherwise customer will think it is dead.

[@user-my8pd5cz8h]

I don.t the answer

[@phoneschematicseducation]

Alright.thanks for the reply

[@TechnologiesSysteme]

Because the charger VBus enters the DC TO DC, the PMID confirms that the 5V of the VBUS are really present, the DC TO DC activates the VPH from the bistrack. The HPV enters the PMIC and the DC TO DC also sends the VSYS OK which allows the PMIC to create the Buck Voltage and LDO Voltage. If the phone is dead the DC TO DC cannot create the HPV and the VSYS OK, for this lesson it is the Fault N which allows the second PMIC to create the buck and the LDO

[@phoneschematicseducation]

Watch the video again.why pm enable secondary line not how