Nokia RM-42 Service Manual

Also see for RM-42: Service manual

Contents

Nokia Customer Care Appendix A: RF TroubleshootingA-10Company ConfidentialCopyright © 2005 Nokia. All rights reservedST_CDSP_RF_SUPPLY_TEST,VINKU ERRORS, PAGE2Propable cause:Poor soldering/faulty RETUOther possible reasons:- Problem in VB_ext connectionbetween RF & BB- Poor soldering/faultyHINKU AND VINKUNOYESYESPropable cause:Poor solder/Faulty VINKUNONOYESPropable cause:Faulty Vinku /Test error(BB/IF tests have beenpassed so VDIG has to be OK!So the problem is in the testmux)NOYESYESYESPropable cause:Test errorNOPropable cause:Poor solder/Faulty VINKUOther possible reasons:Faulty capacitor connectedto VR1NOYESYESYESPropable cause:Test errorPropable cause:Poor solder/Faulty VINKUOther possible reasons:Faulty capacitor connectedto VR2NOGo toST_CDSP_RF_SUPPLY_TEST VINKU ERRORSPAGE 3VB_EXT line fail(0x0001)ST_CDSP_RF_SUPPLY_TEST,VINKU ERRORS, PAGE2NOYESDoes also Hinku’s VB_EXTline fail (0x0001)YESNOVXO supply fail(0x0002)NOYESPropable cause:Faulty Vinku/Test error(BB/IF tests have been passed soVDIG has to be OK! So theproblem is in the test mux)VBAT1 OR VR1(0x0004)NOYESVBAT1 (VBAT_ASIC)OK?YESYESNONOYESYESYESNOGo toST_CDSP_RF_SUPPLY_TEST VINKUERRORS PAGE 3VBAT2 OR VR2(0x0008)Propable cause:Poor soldering/faulty RETUOther possible reasons:-Problem in VB_EXT connectionbetween RF & BB- Poor soldering/faulty HINKU andVINKUPropable cause:Poor solder/faulty VINKUPropable cause:Test errorPropable cause:Test errorPropable cause:Poor soldering/faulty RETUOther possible reasons:Faulty capacitor connectedto VR1Propable cause:Poor solder/faulty VINKUOther possible reasons:Faulty capacitor connectedto VR2VBAT2 (VBAT_ASIC)OK?VR1 (VREG1) OK? VR2 (VREG2) OK?