Circuit Diagram Reading

I hope you've all gone through with previous posts of mine where I've explained about various types of electronic components that a...

I hope you've all gone through with previous posts of mine where I've explained about various types of electronic components that are there in mobiles and tablets because if you haven't then you might face some difficulty in understanding this post.

So I would advise you to kindly go through with the previous posts (if you haven't yet) and then you'll be good to go.

Considering we're all set, let us begin to understand what actually is a track in a PCB(Printed Circuit Board) and it's types.

Well track is a medium of passing a supply or signals to various types of electronic devices such as Mobiles, Computers, Laptops, Tablets, Television, etc.

Various types of electronic components are used in a track for e.g. Resistor, Capacitor, Coil, etc.

These electronic components are placed in a track in two types - In Series Or In Parallel.

Components In Series -




  • If both the ends of the components are linked within the same track then it is know as a Series.
  • If any of the components becomes faulty in Series then the track becomes Open (meaning it does not show any values upon checking with the multimeter)

Components In Parallel -




  • If both the ends of each of the components are on separate tracks OR if one of the ends of each of the components is on one track and their other ends are on ground then it means that it is a parallel track.
  • If any of the component becomes faulty in a parallel track then the track becomes in Short (meaning a component will give a been sound on its both ends) or Leakage Condition (meaning a component will show values on it's both ends).
I have made a Track Identification Table for you all and I hope it helps.


Battery connecter +ve supply  VBAT, VBB, VBB MAIN, VCC, VCC MAIN
Ground GND
On/Off Switch PWR, Power-on, ONX, Power-key, PKEY
Charging Input v-charge in
Output v-charge out
Ear Speaker EAR P
EAR N
MIC MIC P
MIC N
Loudspeaker (Ringer) BUZZER, BUZZO, SPK, IHF SPK
Vibrator VIBRA, MOTOR, M
SIM VCC - VSIM 1
RST - Reset 2
CLK- Clock 3
GND - GROUND 4
NC - Not Connected 5
Light LED+
LED-
Network Signals RX - Receiving Track
TX - Transmitting Track
Power Ics Output Supply VCXO, VSRM, VRX, VCORE, VTX, VCP,
VREF, VB, VANA, VFLASH, VCORE, VIO, VCOBRA


Further below picture should give you a clear understanding of Mobile Function Diagram



If you have any questions or would like to share any specific information you can do so by using the comments section below.

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Homies Hacks: Circuit Diagram Reading
Circuit Diagram Reading
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