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Nokia Hardware & Hardware Repair all what you need for Hardware Repairing for Nokia Phones. Before writing any thread here try to check the Frequently Asked Questions Section. |
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07-05-2009, 13:29 | #1 (permalink) |
Major Poster Join Date: Mar 2008
Posts: 40
Member: 722214 Status: Offline Thanks Meter: 8 | Do You Know ? (2nd post) 1 what is the meaning of hardware calibration and how its work ? any phone has a Analog to Digital cnverter circuit it collect many imformations by the variation of voltage and current in the circuit and this all analog variations are cnvert to a Digital Data and send to the processor In DCT4 this A/D converters are locate in the UEM In BB5 this A/D converters are locate in the RETU ** A/D Name Imformation BSI (battery size indicater) Type of the battery Btemp Tempeture of the Battery ACI Identify the type of accessory which connected to the phone(handfree) VB (not all VB lines) voltage level of the battery Vchar Voltage of the Charger *** Above all A/D converters are need to Tune (callibrat) for working properly and accurate ***this tuning process need to done separatly for each phone *** all this tuning data are store in PM DATA AREA *** these tuning data are diferent from phone to phone even they are in same type **** RF CALIBATION DATA ALSO INCLUDING IN THIS PM DATA AREA *****If these Tuning DATA is currupt so many fault can be occur NOT CHARGING , NO NETWORK ,OVER CHARGING , ACCESSORY NOT SUPPORTED, YOU CAN TRY TO SLOVE BY CHANGING PM FOR THIS FAULT |
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