How is the measurement of the avometer in the mobile

How is the measurement of the avometer in the mobile

🕘Vomiter and measurements We divide the measurements
🕰inside the phone board into a group of sections and use the gradient of the avometer according to the type of measurement required
1. Measure Tracks
2. Measurement of small elements (validity / value expanded)
3. Measuring various components (line house, memory, keys, mic, battery, charging socket, handfree, battery blades, headphone bell, ............)
4. Measuring the validity of the ISIHAT by input and output of the ISSA

🔌 Definition of the path (connection lines) that connect all the elements, components and circuits of the board to each other, and to clarify the path is a connecting line between two points passing through one or more elements to reach the ACI

⬅The path has two characteristics, each path has a specific direction and a specific function, meaning we have a positive path, such as positive charging, which is cycle
1. Connect the voltage worth 5V to the charging
2. Its direction is from positive socket to the charging issie if it has a specific path and has a specific function
Path
types of Positive path +
voltage holder such as charging path as well as positive path Battery blades ....
Data D
path an example of the BSI path coming from the phone's battery through the battery blades and reaching the processor to provide it with the necessary information about the battery validity and charge rate ...
Negative path and the importance of this path for all roundabouts, as it shuts down the circuit to allow the passage of electric

⬅current The NC path is neglected and has no measurement that gives infinity (1 or 4 digits on the avometer
⬅screen) Important information about the tracks
There is a difference between the safety of the path in terms of conductivity and the safety of the volt value on the track, for example, the positive charging socket path, which carries 5V volts up to the charging in the difference that the path is sound and in the difference that the 5V were connected to the ACM Part of them were lost as a result of a leak in one of the elements on the track, which is known as tracking the value of the volt to determine the cause of the loss of the voltage or part of it, and the value of the voltage on the track is tracked using the avometer on the fixed voltage scale (20V)

and placing the negative avo on the negative board and tracking the value of the volt starting from the charging socket output passing through all the elements on the track up to the ACI
The elements on the tracks are connected in two
waysThe first is called a sequence, where the element has its terminals on the positive path only, such as the file, and when the file is damaged, it cuts the second path
in parallel, where one of the ends of the element is on the positive path and the second end is on the negative path, and when the element is damaged, it connects the positive to the negative, causing shorts in the path
The paths cause many malfunctions on the phone, so any defect in the path may lead to the cessation of the work of the circuit, for example

⬅, a broken path that leads to the cessation of the work of the circuit as a result of the failure to reach the feed voltage or the data
signalA path with shorts that may lead to the events of a direct short by phone, for example, the direct feeding path VBAT or the events of the short below the feeder and thus the work of the ESI
⬅has stopped, there are free paths that can be easily measured, which are the paths that are not combined by an element such as a capacitor, such as or AISI, and examples of free tracks (charging socket tracks. line house tracks. battery blade paths. screen connector tracks. Memory. Hand difference. Power switch, volume up and down. Camera. Touching the speaker and bell. Keypad.

⬅ And non-free paths such as
#Pathsthe mic where they become free after lifting the mic
#Paths the bottom of the aisi where they become free after lifting the aisi
#Paths below the elements such as a capacitor.resistance where after lifting the element becomes the 
🕘two points free paths in measuring the paths We will use the bell mode to measure the integrity of the path and the volt mode to measure the integrity of the value on the track
#measurement the safety of a path whose beginning and end 
are known, and this is done on the position of the bell, where we put the end of the avometer on the beginning of the path and the other end on the end of the path, a sound path that is given a bell. A truncated path is given infinity (1 or 4 digits) on the phone screen, in which case the cut is tracked by tracking the elements on the track. 

🌈How to measure paths in their different forms

Walk and connect the path by replacing the damaged element or bridge the track to reconnect it
#a pathits beginning is known and its end is unknown, meaning that the beginning of the path is known, but the path passes under AISI and its end is unknown, like all the free tracks on the phone board, for example, the paths of the line house, charging sockets, or battery blades, and these paths are measured by placing the bell with the so-called reverse impedance, where the positive avometer is placed on the negative of the board and the measurement is negative avo on the path whose beginning 
is known#And it isThe measurement result is as follows
⬅Sound path given reading 3 digits on pardon
⬅Broken path given infinity
⬅A path with shorts A bell
⬅is given A negative path is given a bell because the other end of the avo is on the ground
The circles are tracked on the bell mode by standing on the first path in the circle at the end of the avo and tracking at the other end, where any element given the sound of a bell is affiliated with the circle

🌈Important information

📲Illustration Find a charging circuit

It is known that the beginning of the charging circuit begins with the positive path of the charging socket, so when you put the avometer on the beginning of the path with the socket and tracking at the other end, you can easily determine the charging circuit, but in order for the tracking process to be done professionally, you must make sure of the safety of the path before the tracking process, as the path is considered one of the free tracks, as well as its beginning is known and its end is unknown, so we will use reverse impedance to ensure its safety by placing positive avo on negative board and negative avo on the path if given Three numbers if the path is correct we can trace it and if it gives infinity if a broken path we can't trace the charging circuit through