2700c/5130c insert sim : step by step solution

[scsarcar]

here I show u , how to repair insert sim problem of okia 2700c & 5130c ( because both r same type of pcb)

there is no sim esd filter in this sets , sim card controlling circuit r in avilma. first we check vsim voltage 2.8v in linefilter L2704 from avilma( in first picture) .
vsim 2.8v supply from avilma.
if no voltage obtain or less voltage , first remove two filter chipcaps C2700 & C2702 .
after remove that two chipcaps we need to check vsim voltage again in L2704 . if still no voltage obtain or less go to second step.

in vsim voltage output line there is another twin filter capasitor C2220 , value 1.5mfd/6.5v . if it's damage or shorted then also insert sim problem aeries . (see in picture no three)
so remove that twincapasitor then check for vsim voltage . if still same then we need to change avilma.

simrst,simclk,simio line goes to avilma directly . so if vsim voltage is normal but can't detect sim by mobile then avilma should be faulty & we need to replace avilma with new one.

sometiems it's also due to loose solder joints under avilma . so before replace reball avilma then check.

I don't mention to check simcard tray or jacket (X2700) because it's a common issue.

please feel free to ask anything if u can't understand .

[yanponsel]

thanks you......................................

[NANDH]

can you snd again with large sizes images to view clear,
regarding this problem u mentioned that see in the first picrure about vsim voltage, we din't understand which is first pic, bcoz the pic's are with low sized to view, we r seeing in the mobile browser
So please send with clear viewing pic's to solve the 2700c insert sim problem my email :
To view links or images in this forum your post count must be 1 or greater. You currently have 0 posts.

[Yash_MobileCare]

can you snd again with large sizes images to view clear,
regarding this problem u mentioned that see in the first picrure about vsim voltage, we din't understand which is first pic, bcoz the pic's are with low sized to view, we r seeing in the mobile browser
So please send with clear viewing pic's to solve the 2700c insert sim problem my email :
To view links or images in this forum your post count must be 1 or greater. You currently have 0 posts.

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