General power checking
Check the following voltages:
Signal
Rename
Regulator
Sleep
Idle
Nominal
voltage
Main user
Notes
VIO
Pearl/Gazoo
ON
ON
1.8
Memory, I/Os,
Display
VBACK
Pearl/Gazoo
ON
ON
2.5
Back-up
battery
VSIM1
Pearl/Gazoo
ON
ON
1.8/3.0
SIM card
VAUX1
Pearl/Gazoo
ON
ON
2.8
TV-OUT, Display
VAUX2
Pearl/Gazoo
OFF
OFF
2.5
ALS,
accelerometer
and
magnetometer
VANA
Pearl/Gazoo
ON
ON
2.5
Audio
VR1
Pearl/Gazoo
OFF
ON
2.5
Crystal
oscillators
VRFC
Pearl/Gazoo
OFF
ON
1.8
RAPU
converters
VRCP1
Pearl/Gazoo
4.75
To RF parts
VREF
Pearl/Gazoo
ON
ON
1.25
RF reference
VCORE
Pearl/Gazoo
ON
ON
1.2
RAPU digital
Can change due
to RAPU version
& SW
VOUT
Pearl/Gazoo
OFF
OFF
2.5
Video switch
VCAM_2V8
N1401
OFF
OFF
2.8
Camera
Disabled in
sleep
VCAM_1V8
N1402
OFF
OFF
1.800
Camera
Disabled in
sleep
VMEM
Pearl/Gazoo
OFF
OFF
2.9
microSD
Disabled in
sleep
RM-424; RM-564
BB Troubleshooting and Manual Tuning Guide
Page 3 –12
COMPANY CONFIDENTIAL
Issue 1
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