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General voltage checking
Steps
1. Set up the main board in the module jig. The phone should be in local mode.
2. Check the following:
#
Signal name
Test point
Voltage (all bands)
1
VCTCXO supply
R7501
2.5 V
2
AHNEUS supply from DC/DC conv
C7590
3.2 V
3
FEM supply
L7510
3.9 V
4
WCDMA PA supply from DC/DC conv
C7543
0 V (1.3 V when transmitting)
5
Vbat at WCDMA PA
C7547
3.9 V
6
Supply input to DC/DC conv
L7592
3.9 V
RM-356
RF troubleshooting
Issue 1
COMPANY CONFIDENTIAL
Page 4 –9
Copyright © 2008 Nokia. All rights reserved.
Содержание 5800 - XpressMusic Smartphone - WCDMA
Страница 131: ...4 RF troubleshooting Nokia Customer Care Issue 1 COMPANY CONFIDENTIAL Page 4 1 Copyright 2008 Nokia All rights reserved ...
Страница 189: ...RM 356 RF troubleshooting Issue 1 COMPANY CONFIDENTIAL Page 4 59 Copyright 2008 Nokia All rights reserved ...
Страница 255: ...Glossary Nokia Customer Care Issue 1 COMPANY CONFIDENTIAL Page Glossary 1 Copyright 2008 Nokia All rights reserved ...