General power checking
Check the following voltages:
Signal
name
Regulator Sleep Idle Nominal
voltage
Main user Notes Supply
VIO External
SMPS
N2201
ON ON 1.82 Displays, I/Os
VBACK AVILMA ON ON 2.6 Back-up battery
VSIM1
VSIM2 AVILMA ON ON VBAT3
VDRAM External
SMPS
N2201
ON ON 1.82 SDRAM
VAUX AVILMA OFF OFF 2.78 FM radio, ALS, MR
sensor, displays
VBAT5
VANA AVILMA ON ON 2.5 AVILMA VBAT4
VR1 AVILMA OFF ON 2.5 Crystal oscillators VBAT4
VRFC AVILMA ON OFF 1.8 RAPIDO converters
VRCP1 AVILMA 4.75 To RF parts RF active VBATCP
VRCP2 AVILMA 4.75 VBATCP
VREF AVILMA ON ON 1.35 RF reference
VCORE External
SMPS
N2390
ON ON 1.35/1.05
on sleep
RAPIDO digital
core
VOUT BETTY OFF OFF 2.5 Audio switch
VCAMANA External
LDO N2501
2.8 Camera
VCAMDIG External
SMPS
N2500
1.8 Camera, STV984
LEDOUT External
SMPS
N2301
< 18 Display backlight According
to
Regulator
spec
VSD SD
levelshifter
2.9 MicroSD card
VIO_VILMA AVILMA ON ON 1.82 Audio, BT
RM-179; RM-223
Baseband Troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 3 –7
Copyright © 2007 Nokia. All rights reserved.
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