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Old 30-07-11, 07:48 PM   #1
rezwan_jack
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newstar.gif Understand the SIM Card working system on All Cell Phones

Understand the SIM Card working system on All Cell Phones


Sample Nokia because its all systems on the basis of his work similar

At pin Simcard must consist of 6 Pin .. consisting of:

Simclock

Simdata

Simreset

VSIM

Ground

Nc (Not Connetcetd)


All phones must be composed of six pins is just ....

Consider the following schematic:


If we look at it ... workflow from the sim card is ....
From the sim connector ===> ====> Simcard Emif Power Ic
This applies to all phones ....

In detail we take the example image below:






This point should we really understand .... because the work will be very decisive steps which we will do ....

PIN2 is important that we have noticed is all the PIN2 must be in a state connected to each other according to the path ... except for NC path alias not connected or not connect to mana2


STEP 2 simcard in determining damages is ....

1. Simcard replace first ... lest we not read sim card mobile phone sim card because it is damaged ... oon's really tuh hehehheheh
2. If the sim is ok ... measuring inhibition of 5 pins in it ... VSIM particular point, the data sim, sim sim clock and reset ....

PIN2 is to determine where on the connector ... the steps we need to do is to determine which point PIN2 Ground on the sim card connector ....

You have to understand ... that the ground would be in one corner of the sixth PIN2 .. as shown below:





If you notice ... then the ground of the sim card connectors are located on the bottom right corner ...

to determine the next titik2 ....

that is certain!!


ground position to deal with VSIM
On the ground must have NC
His next composition of the next sequence certainly like the picture above ....


Well,.,, After we know titik2 of PIN2 in accordance with its name ... then the next step is ... by measuring the resistance in the pin data, clock, reset and VSIM ....

if there are no obstacles in the climb, ... hence can be sure that your cell phone damage is a line break between emif simcard with connectors or damage to the emif simcard ....

steps you should do is ... by lifting emif sim card ... then measure the correlation between the broken lines in accordance track down emif sim ...

if the line is not severed was good aka .. hence can be sure that ... emif simcard must BROKEN! solution is to replace or men jumper emif emif simcard simcard in accordance with the track ... for example at the above phone .. jumper the trick is as follows:





capasitor2 unplug serve targeted if the obstacle in the path simcard problem ....

Next ........

If we measure it all turned out normal barriers ... The next step is to lift emif sim ... then measure the resistance in between emif Power Ic simcard that led to the one in emif ... the goal is to find out .. whether between emif simcard and power ic .... there is a line break

if there is no increased resistance value .. hence can be sure that there is line break between emif and power ic .. then the solution is to jumper between emif simcard into power ic in accordance with the broken lines ...


If after performing the measurement .. apparently all the normal barriers .. then jumper simcard emif first ... if after to jumper emif simcar normal direct phone .. hence can be sure the damage to emif ....


but if it turns out after to jumper emif ... no sim card also read ... hence can be sure damage to the power ic ...
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