Nokia 3110c Contact Service Caused by Sleepx Solution

Nokia 3110c Contact Service Caused by Sleepx Solution

Nokia 3110c contact service.., but all security test is valid ( imei, simlock, superdongle key )


When do selftest, and the result is sleep_x_loop failed. it seems to be a hardware problem.

Selftest with Mxkey dongle


 Selftest with UFS3 / HWK


sleep x is the voltage that distributed by RETU / Primary Power IC to TAHVO / secondary power IC
 and RAPGSM / CPU IC.

sleepx at RETU IC


That's mean there is 3 possibility, between RETU IC, TAHVO IC and CPU IC.

sleepx at CPU IC / RAPGSM 


In this / my case, the problem solved by replacing TAHVO IC.

sleepx at TAHVO IC
If you are expert, you should measure connections between RETU, TAHVO and RAPGSM IC track / ways, also you should measure sleep x voltage at Junctions ( J2219 ) must be 1.8V.


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