General Voltage Checking - Nokia 3555 Service Manual

Phoenix preparations
Install the phone specific data package, for example
specific settings..
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 VCTCXO supply
2 AHNEUS supply from DC/DC conv
3 TXFEM supply
4 WCDMA PA supply from DC/DC conv
5 Vbat at WCDMA PA
6 Supply to AHNEUS DC/DC conv
* With these settings, the result should be 3.1V.
Page 4 –8
Figure 19 Auto tuning concept with CMU200
Tuning (Alt-U) > Auto-Tune (Alt-A) from the menu.
Tune button.
Signal name
COMPANY CONFIDENTIAL
Copyright © 2007 Nokia. All rights reserved.
RM-270_dp_1.78_sw_sh3.26.exe . This defines phone
Test point
R7501 2.5 V
L7502 3.2 V
L7510 3.9 V
C7543 0 V (When transmitting 1.3 V - 3.1 V
depending on output power. *3.1 V
with settings as in the note below.)
L7550 3.9 V
L7592 3.9 V
RM-257; RM-270; RM-277
RF troubleshooting
Voltage (all bands)
Issue 1