General power checking
Voltages
Check the following voltages:
Signal
Rename
Regulator Sleep Idle Nominal
voltage
Main user Notes
VIO RETU ON ON 1.82 Memory, I/Os,
IrDA, Display
VBACK RETU ON ON 2.5 Back-up
battery
VSIM1 RETU ON ON 1.8/3.0 SIM card
VSIM2 RETU OFF OFF 3.0 Keyboard
backlight
EL-foil driver
VDRAM RETU ON ON 1.82 SDRAM
VAUX RETU OFF OFF 2.5 IrDA IrDA active
VANA RETU ON ON 2.5 Audio, some
pull-ups
VR1 RETU OFF ON 2.5 Crystal
oscillators
VRFC RETU OFF ON 1.8 RAP3G
converters
VRCP1 RETU 4.5 To RF parts RF active
VRCP2 RETU 4.5 To RF parts RF active
VREF RETU ON ON 1.35 RF reference
VCORE TAHVO ON ON 1.4 RAP3G digital
VOUT TAHVO OFF OFF 2.5 Accessory
connected
VCAM_2V8 LP3987ITLX-2.
85/N1060
OFF OFF 2.85 Camera Camera ON
VCAM_1V8 LM3671TLX-1.
82/N1080
OFF OFF 1.8 Camera Camera ON
VCAM_1V5 TPS62311YZD
R/N1050
OFF OFF 1.5 Camera Camera ON
2V8_FM_LCD LP3985ITLX-2.
85/N6050
ON ON 2.85 FM, LCD, Hall
sensor
VMMC LP3928TLX-18
28/N3200
OFF OFF 3.0 MCC card
LCD_LED_OUT 4w_LED_DRIVE
R
OFF OFF LCD Backlight
RM-123; RM-145
Nokia Customer Care BB Troubleshooting and Manual Tuning Guide
Page 6 –8 COMPANY CONFIDENTIAL Issue 1
Copyright © 2006 Nokia. All rights reserved.
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