General power checking
Check the following voltages:
Signal name Regulator Sleep Idle Nominal
voltage
Main user Notes
VIO AVILMA ON ON 1.82 Memory, I/Os,
Display
VBACK AVILMA ON ON 2.5 Back-up
battery
VSIM1 AVILM ON ON 1.8/3.0 SIM card
VDRAM AVILMA ON ON 1.82 SDRAM
VAUX AVILMA OFF OFF 2.5 Camera,
Display
VR1 AVILMA OFF ON 2.5 Crystal
oscillators, RFIC
VRFC AVILMA OFF ON 1.8 RAPs
converters
VRCP1 AVILMA 4.75 To RF parts RF active
VREF AVILMA ON ON 1.35 RF reference
VCORE BETTY ON ON 1.05
1.25
1.35
1.40
Combo
memory
VOUT BETTY OFF OFF 2.5 Accessory
connected
VSIM2 AVILMA OFF OFF 2.2 Internal
microphone
Charging troubleshooting
Troubleshooting flow
RM-561
BB Troubleshooting and Manual Tuning Guide
Issue 1 COMPANY CONFIDENTIAL Page 3 –9
Copyright © 2009 Nokia. All rights reserved.
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