Flow Schematic Symbols
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Need help on this .?
What does the symbol “G1000 – 2.6V” and “GND” means ?
Also , will there still be electrical flow on the circuit if the main battery is removed for at least a day ? Will touching it with bare hands “short” the circuitry ? How long can the G1000 holds its charge/energy ?
Schematics ( pg 3 ,search for “G1000″)
http://gauravgiri.com/nseries/Nokia_N73_Schematics.pdf
Circuitry view ( pg 30 , cell looking thing on top right of “1.5″ )
http://gauravgiri.com/nseries/Nokia_N73_Service_Manual_1_2.pdf
If you don’t know GND “Ground” are you sure you want to open and potentially damage this phone?
G1000 is a battery probably a small one to maintain the data when the main batt is dead. It could last for months or longer. It has very little power but is powering a very low demand circuit.
If you remove the main bat the circuit will be almost entirely dead in a second or two. G1000 does not power much of the phone, just the VBACK line which is the backup for the memory.
That may contain your contacts and their phone numbers, (almost certainly) your provider, calibration characteristics of the phone which allow it to work on the network, and ???
If you want that data to go away you will have to remove the batt G1000 or VERY QUICKLY short it out with a piece of wire.
Touching the phone with your bare hands may subject it to ESD or Electro Static Discharge. That can happen anytime and may destroy or damage the phone without you having any idea it just happened. ESD is like when you shuffle your feet on a carpet and shock yourself on a doorknob. Only a cell phone would be MUCH more sensitive. We have desks with special mats and wires we connect to our wrists to protect against ESD when we build electronics.
I am not sure what you are trying to do but good luck you will need it.
I build electronics for a living and worked for a couple phone companies including one who designed cell phone chips and I don’t bother to open mine except for the battery!
DC Theory 2A Segment 1 – Current Flow