General power checkingCheck the following voltages:SignalnameRegulator Sleep Idle NominalvoltageMain user Notes SupplyVIO ExternalSMPSN2201ON ON 1.82 Displays, I/OsVBACK AVILMA ON ON 2.6 Back-up batteryVSIM1VSIM2 AVILMA ON ON VBAT3VDRAM ExternalSMPSN2201ON ON 1.82 SDRAMVAUX AVILMA OFF OFF 2.78 FM radio, ALS, MRsensor, displaysVBAT5VANA AVILMA ON ON 2.5 AVILMA VBAT4VR1 AVILMA OFF ON 2.5 Crystal oscillators VBAT4VRFC AVILMA ON OFF 1.8 RAPIDO convertersVRCP1 AVILMA 4.75 To RF parts RF active VBATCPVRCP2 AVILMA 4.75 VBATCPVREF AVILMA ON ON 1.35 RF referenceVCORE ExternalSMPSN2390ON ON 1.35/1.05on sleepRAPIDO digitalcoreVOUT BETTY OFF OFF 2.5 Audio switchVCAMANA ExternalLDO N25012.8 CameraVCAMDIG ExternalSMPSN25001.8 Camera, STV984LEDOUT ExternalSMPSN2301< 18 Display backlight AccordingtoRegulatorspecVSD SDlevelshifter2.9 MicroSD cardVIO_VILMA AVILMA ON ON 1.82 Audio, BTRM-179; RM-223Baseband TroubleshootingIssue 1 COMPANY CONFIDENTIAL Page 3 –7Copyright © 2007 Nokia. All rights reserved.
