Nokia 6233 Service Manual page 165

RM-123; RM-145
RF troubleshooting
Setting
Phoenix RF Control
Phoenix Tx Power level
Check the following
Check the voltages in the steps below.
NO. Signal Name
1 V_Det_GSM
2 PA_supply-VBAT
3 RF level-ANT_GSM
4 Sw cont-VC1_TXFEM
5 Sw con-VC2_TXFEM
6 Sw con-VC3_TXFEM
7 Tx-1
Issue 1
GSM900
Operational mode = Burst
Tx data type = Random
10
Test point
J7533
C7521
Conn.
J7530
J7531
J7532
R7522
Figure 48 GSM900/1800/1900 TX test points
COMPANY CONFIDENTIAL
Copyright © 2006 Nokia. All rights reserved.
GSM1800
5
GSM900
730mVDC 660mVDC
3.8VDC 3.8VDC
23dBm 20dBm
2.75VDC 2.75VDC
0V 2.75VDC
2.75VDC 2.75VDC
897.4MHz/-28.7 -
dBm
Nokia Customer Care
GSM1900
5
GSM1800 GSM1900
690mVDC
3.8VDC
20dBm
2.75VDC
2.75VDC
2.75VDC
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