@rizzi87
I will be talking about capacitors here:
As with any rule there are exceptions. On a normal day if a capacitor reads the same value as you touching your probes together then it is dead/at least on a line that is going to ground. The exception is when the capacitor is connected to ground on both sides (EMI reduction), or isn't connected to ground directly at all (DC removal from microphonesignal, using it as a "battery")
I may have a lot to learn about these exceptions and how they are used in certain applications before I conclude any diagnosis pertaining to any components. This is a learning curve and is most intriguing.
The rule of thumb is if it runs perpendicular to the chip then it will have one end on ground and one on a power/data (anything with some sort of resistance). If it runs parallel to the chip then it will be tied to ground on both ends. The best way to see this is to see the traces that come from under the chip in question as not all components surrounding the chip in question actually relates to the chip itself.
As in one of Alex's many great videos, you will normally find that resistors are used anywhere but ground. Again, there are many exceptions, but they do not tie directly to ground.
Chokes/inductors are the same where they will have a low resistance across them but will not normally be tied directly to earth/ground.
This rule of thumb leaves me confused due to the placement of the components between multiple chips (in close proximity to one another).
I think your latter suggestion to find out the type of connection by observing the traces is a lot more informative and affirming.
If I remember correctly they were linked to the microphone? If so, they would be there to remove the DC power from your voice/sound as sound is an AC wave but you need voltage to carry the wave on as you'd be looking at mV or less for a microphone input.
Just as I thought to have understood some things.......never mind!
Try the obvious charge/battery change on those first. If you are semi serious about this sort of stuff I would invest in a decent bench tester. The current pull at various stages will become invaluable for your diagnostic skills.
I have a pin out diagram for where to get your various voltages and Data lines from for that device if you need to just pull the data off.
If you have a spare 30 mins or so. Put your multimeter in continuity mode, touch the ends of your leads togehter and note the value. Go over every capacitor on the board and note down and if you can photograph the ones that are reading the same value as previously noted.
I'll start a separate topic/discussion for the other phones but they are in working condition except for the display. Which is either because of a busted screen or a fault in the display circuit. I have invested in a 30V/5A power supply unit and will be here in some time. I'll keep you updated on the readings of the current pull.
A donor i9060 board is not possible at this time so if you can help me with the pin out diagram and the procedure to pull the data, it'd be awesome.
Kindly excuse me for the delay in responding to your message since I was occupied with a few personal tasks. I'll do the tests for the capacitors and document the same later this week. In the meantime, please check the image link below wherein I measured the voltages that are created during boot-up. I have flagged the ones which seem abnormal compared to some reference info(similar to the one you posted sometime back).
Please don't think I have ignored you. I have replied, the message is still awaiting moderation.
Not at all! In fact, you have been most patient and benevolent in answering my queries. Everyone has their own priorities/responsibilities, so your generosity in taking the time to help me fix this phone is truly appreciated.
@Mods - Kindly delete my previous post as the time to edit it had expired
@matrs
No major update since I've been quite busy with work and a new venture. Moreover, the power supply unit I had ordered was damaged and had to be sent back for a replacement.
In the meantime, I will try the rosin/freeze spray method to determine the specific components/area that gets hot during boot-up which may be of some help. Will keep this thread updated with the progress.