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
2.78
Camera,
Display
VR1
AVILMA
OFF
ON
2.5
Crystal
oscillators, RFIC
VRFC
AVILMA
OFF
ON
1.8
RAP3G
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
RAP3G digital
VOUT
BETTY
OFF
OFF
2.5
Accessory
connected
VCAM_2V8
LP3987ITLX-2.
85/N3351
OFF
OFF
2.850
Camera
Disabled in
sleep
VCAM_1V8
LM3677TLX-1.
82/N3350
OFF
OFF
1.800
Camera
Disabled in
sleep
VSIM2_MMC
KMBGN000A/
D4800
OFF
OFF
2.850
Internal
memory
Disabled in
sleep
VLEDOUT
TPS61061/
N2301
OFF
OFF
14.5
LCD Backlight
Disabled in
sleep
Charging troubleshooting
Troubleshooting flow
RM-352; RM-354
BB Troubleshooting and Manual Tuning Guide
Issue 1
COMPANY CONFIDENTIAL
Page 3 –9
Copyright © 2008 Nokia. All rights reserved.