General Power Checking; Charging Troubleshooting - Nokia 2700c-2 Service Manual

RM-561
BB Troubleshooting and Manual Tuning Guide

General power checking

Check the following voltages:
Signal name Regulator
VIO AVILMA
VBACK AVILMA
VSIM1 AVILM
VDRAM AVILMA
VAUX AVILMA
VR1 AVILMA
VRFC AVILMA
VRCP1 AVILMA
VREF AVILMA
VCORE BETTY
VOUT BETTY
VSIM2 AVILMA

Charging troubleshooting

Troubleshooting flow
Issue 1
Sleep Idle
ON ON
ON ON
ON ON
ON ON
OFF OFF
OFF ON
OFF ON
ON ON
ON ON
OFF OFF
OFF OFF
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Nominal Main user
voltage
1.82 Memory, I/Os,
Display
2.5 Back-up
battery
1.8/3.0 SIM card
1.82 SDRAM
2.5 Camera,
Display
2.5 Crystal
oscillators, RFIC
1.8 RAPs
converters
4.75 To RF parts
1.35 RF reference
1.05 Combo
memory
1.25
1.35
1.40
2.5
2.2 Internal
microphone
Notes
RF active
Accessory
connected
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