Wednesday, 4 July 2018
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Tuesday, 3 July 2018
Monday, 2 July 2018
BATTERY KE VOLTAGE KO KAISE CHECK KARE
SMART TELECOM1 July 02, 2018 SMARTTELECOM1 BATTERY VOLTAGE CHECK No comments
BATTERY KO KAISE CHECK KARE
FULL DETAIL INFORMATION
A good and working battery voltage is approximately
3.7 volts DC(direct current),
below that
maximum voltage range the phone will not be able to power on.
Checking the battery voltage by Digital multi-meter is so easy,
just set it to a
DC range 20volts then attach the both test probes to each corresponding
polarity,
positive probe to positive terminal, then negative probe to negative
battery terminal.
Check the maximum battery voltage reading 3.7 volts.
A battery voltage lower than 3.7 volts can power on
the handsets but it shows Battery Low on a screen.
A battery voltage lower than 2 to zero volts will
hardly charge the phone and won't power up the phone.
EASY STEP HOW TO CHECK FOLLOW HERE
Step 1.
Turn
off your cell phone and open up the battery compartment.
Step 2.
Remove
the battery and set it down on a flat surface so the terminals are facing you.
Step 3.
Identify
the two terminals on the battery that are labeled with a "+" and a
"-" sign.
Then, look on the battery's label to find out how much
voltage it is rated at.
For instance, on the battery pictured, the voltage is
rated at 3.7 VDC, or approximately 4 volts DC.
Touch
the tip of the red probe to the terminal labeled " + ." Keep them in
contact while you press the tip of the black probe to the terminal labeled
" - ."
Check the digital reading on your multimeter to see how much charge the battery has. In this case, the battery has a 4 volt DC charge. It is fully charged.
A drain battery voltage approximately down to zero
volts will not be able to accept charge when a charger is being plug-in.
A
drain battery will be shock by a a higher voltage range from 6 to 12 volts for
a quick charging point as possible to avoid damaging the battery,
a DC regulated power supply. is the equipment
used to shock a drained battery.just connect both probe to each corresponding
polarity for a quicker period of time,
prolonging it will damage the battery
itself. You may ask an experience technician in your neighborhood
about this
method for assistance and safety guidelines.
WATCH VIDEO TILL THE END TO UNDERSTAND CORRECT.
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full short, half short & 0k condition & what is shorting in mobile phones:
Full short, half short & 0k condition
what is shorting in mobile phones:
The first thing you have to check in dead mobile
phones after checking the battery is shorting. And if it is short, you will
first have to remove it to get it repaired. All technicians should know how to
remove a short circuit in cell phones.
Reasons for shorting in mobile phones:
Phone falling
in water. This is the most common reason
Handset overheating.
Using an incompatible or faulty charger for
charging
Sometimes, sparks or smoke coming out of the
handset due to any reason.
We have to understand the below 2 terms of
electronics to understand shorting better:
Open circuit: If a track is broken, then it is said
that the track is open.
Short circuit: If 2 parallel separate tracks touch
each other due to some fault, it is called short circuit.
important information read till the end...
Note: In circuit boards of cell phones, tablets or
any other electronic device, there are tracks instead of wires through which
current flows. Hence we use the term ‘tracks’ instead of wires or cables.
Option 1.
How to check shorting in mobile phones with
multimeter:
We can easily check whether there is shorting in
the circuit board or not with the help of a multimeter. Follow the steps below:
Keep the multimeter on continuity setting (Also
called diode setting)
Identify the positive and negative terminals of the
battery connector. The positive terminal (+) is the pin of the battery
connector where the positive terminal of the battery touches on it. It is also
called vBat (Battery Voltage) pin. While negative terminal (-) is the pin of
the battery connector where the negative terminal of the battery touches on it.
It is also called GND (Ground) pin.
Now touch the red probe (+) of the multimeter to
negative terminal of the battery connector.
If you see any reading on the multimeter or hear a
continuous beep sound, then the motherboard is short i.e your mobile phone is
short.
And if there is no reading or no continuous beep sound, the board is not
short.
If you are using an analogue multimeter, keep it on Ohms(x10) setting.
If the pointer (needle) moves even a little, than it is short, otherwise, it’s
okay.
Option 2.
How to check shorting in mobile phones with DC
Power Supply:
A DC Supply is also called jhatka machine or
battery eliminator. Its work is to convert AC voltage coming from an AC volt
source to DC voltage. To check shorting, follow the step below:
Switch on the DC power supply. Now select the
output voltage as much as its battery voltage. You can read it on the battery.
In most phones, it is 3.7v or 3.8v. Some Chinese phones have output of 4.2
volt.
Connect red probe to the positive terminal of the
battery connector (vBat pin) and the black probe to the negative terminal
(GND)as well as the 3rd pin called BSI. And do not touch any other key or
button.
Now, if you see any amount of current on the
screen, then it means, the circuit board is short.
And if, there is the screen shows ‘0.00’ in the
current reading, then it is okay.
Problems in handset if it is short:
Dead
Battery drains and discharges fast
Overheating
Hanging
Switches off automatically or restarts.
Learn How to use multimeter in mobile phone
repairs.
If the circuit board is short, you will first have
to remove shorting for fixing the problem, especially, if the handset is in
dead condition. Learn how to remove shorting in mobile phones.
Note: The above procedure to check shorting is the
same for all brands of cell phones and tablets including Samsung, iPhone,
Nokia, Sony, HTC, Motorola and Chinese handsets. It will be the same for all
smartphones be it based on iOS, android or Windows OS.
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Saturday, 30 June 2018
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