Capacitors in schematic question

[caphair]

Are the first two caps connected differently than the rest in this row or is it merely a space savor for the schematic to draw the rest like that?

Or are the rest tied in together in parallel? Just looks weird to me

[stj]

Re: Capacitors in schematic question

the first 2 are caps, the others are filters.

[caphair]

Re: Capacitors in schematic question

As in filter caps? I'm trying to locate a short on one of the caps on that rail

[stj]

Re: Capacitors in schematic question

it's a ceramic cap with 4 pins - 2 of them are ground.

are they nec/tokin prodalizers?

[caphair]

Re: Capacitors in schematic question

it's a ceramic cap with 4 pins - 2 of them are ground.

are they nec/tokin prodalizers?

Why 4 pins? Can you explain difference between regular caps? I'm not sure what type they are. Don't think I've run across them before. They're super tiny on an iPhone board

[stj]

Re: Capacitors in schematic question

you can get caps that are like a ceramic block with a signal connection on each end connected together across the cap, and earth connections on the sides.
they are used for filtering signals usually.

[caphair]

Re: Capacitors in schematic question

I see. That GPU line supposed to have at least 1v on it but it's missing tried running a jumper from CPU line which is 1v to cap c0466 but still phone doesn't boot.

[capwizard]

Re: Capacitors in schematic question

U0201 POP-FIJI-1GB-DDR-B0 is A 1gb RAM inside CPU. 1v on the cap c0466 which is Data line voltage, u need to use oscilloscope to see the waveform.

Power Supply IC PM8019 Chip for iPhone 6 which is the one u need to trouble shooting.

[caphair]

Re: Capacitors in schematic question

U0201 POP-FIJI-1GB-DDR-B0 is A 1gb RAM inside CPU. 1v on the cap c0466 which is Data line voltage, u need to use oscilloscope to see the waveform.

Power Supply IC PM8019 Chip for iPhone 6 which is the one u need to trouble shooting.

Are you saying I can only see the 1v with an oscilloscope or it should be there visible with a voltmeter?

Also schematic says vcc main should be 4.6v but I only measure 4.2v. Wonder if pmu chip partly shorted causing that

[capwizard]

Re: Capacitors in schematic question

In the circuit diagram Power Supply IC PM8019 Chip use 5 sections of circuit diagram to explain the function of this chip.

Sorry! about the picture,I cant upload modified PDF file,so I did as you took picture over monitor. .

pic1 is all the system diagrams all put together.
In the circuit diagram use SYM 1,2,3,4,5 of 5 to show it.


in your posted fist picture, show A 1gb RAM inside CPU U0201 on SYM 15 of 15 mean last page. So the U0201 has 15 system diagrams.

[capwizard]

Re: Capacitors in schematic question

Are you saying I can only see the 1v with an oscilloscope or it should be there visible with a voltmeter?

low resistance voltmeter will drop the signal and 1v mean peak to peak voltage. so you can't do this ( running a jumper from CPU line).

Also schematic says vcc main should be 4.6v but I only measure 4.2v. Wonder if pmu chip partly shorted causing that

If there has a short, at somewhere in the circuits will drop to 0v.

[caphair]

Re: Capacitors in schematic question

So is it possible the 1v IS there I just can't see it without a scope?

It's only voltage that I was missing when checking the output voltages of the PMU. The phone is only drawing 50ma when turned on but a properly working phone draws more around 80ma-1a

So pm8019 is different than the bigger PMU chip u1202? I thought that was responsible for power?

[capwizard]

Re: Capacitors in schematic question

I love this Grandma. she can make your iphone 6 came back to life.

Grandma? Seriously?.....Start any motherboard by shorting power pin to ground.
https://www.youtube.com/watch?v=qqaT_HfbAl4

Should you put your phone in rice? Only if you want to buy a new phone
https://www.youtube.com/watch?v=plmElKA6qKM

[caphair]

Re: Capacitors in schematic question

Those videos don't address the issue I have unfortunately lol

[capwizard]

Re: Capacitors in schematic question

She is my Adele. No problem, then try this guy.

How to use rice to repair water damage on iPhones and Macbooks
https://www.youtube.com/watch?v=yPeITOz2_YM

[caphair]

Re: Capacitors in schematic question

Those videos don't help me. Why'd you say to check that broadband power chip?

[capwizard]

Re: Capacitors in schematic question

It's only voltage that I was missing when checking the output voltages of the PMU. The phone is only drawing 50ma when turned on but a properly working phone draws more around 80ma-1a
The phone is only drawing 50ma, Also schematic says vcc main should be 4.6v but I only measure 4.2v. Wonder if pmu chip partly shorted causing that...

Water damage is unpredictable. from 4.6v to 4.2v and current from 80ma to 50ma mean partially working, most likely is data or address lines shorted cause some chips is not working, it could happen to anywhere because data and address lines are parallel together. , if pmu chip partly shorted will causing more current reading but not on the data or address lines .

[caphair]

Re: Capacitors in schematic question

It's only voltage that I was missing when checking the output voltages of the PMU. The phone is only drawing 50ma when turned on but a properly working phone draws more around 80ma-1a
The phone is only drawing 50ma, Also schematic says vcc main should be 4.6v but I only measure 4.2v. Wonder if pmu chip partly shorted causing that...

Water damage is unpredictable. from 4.6v to 4.2v and current from 80ma to 50ma mean partially working, most likely is data or address lines shorted cause some chips is not working, it could happen to anywhere because data and address lines are parallel together. , if pmu chip partly shorted will causing more current reading but not on the data or address lines .

So how could I figure out which chips are not working in this case?

[capwizard]

Re: Capacitors in schematic question

Its hard.
Yesterday, Ive changed touch ic on iphone6. I bought both of them U4201 and U4202 and try in the air. some people use finger to push down and find the problem. But this one is an easy common problem than yours.

[caphair]

Re: Capacitors in schematic question

Doesn't the iPhone 6 have one power management chip responsible for all other chips voltage input?