General Voltage Checking - Nokia RM-579 Service Manual

RM-578; RM-579
RF troubleshooting
Auto tuning procedure
1 Make sure the phone (in the jig) is connected to the equipment. Else, some menus will not be shown in
Phoenix.
2 To go to autotune, select
3 Start autotuning, clicking the

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:
#
1 Vbat at N7520 (FEM)
2 Vbat at N7505 (Transceiver)
3 VCCXO supply
Issue 3
Tuning (Alt-U) > Auto-Tune (Alt-A) from the menu.
Tune button.
Signal name
COMPANY CONFIDENTIAL
Copyright © 2009 Nokia. All rights reserved.
Test point
J2903 3.0-4.7 V
C2070 3.0-4.7 V
C2213 2.4-2.6 V
Voltage (all bands)
Page 4 –7