Edge - Nokia NPL-4 Series Troubleshooting Instructions

NPL-4/5/RM-104
Troubleshooting Instructions

EDGE

Ensure that the GMSK is OK!
Use Phoenix to select
TX_Data Type: "1" or "0"
TX Power Level: 5
Ch661
Ensure Vbatt=3.9 V
Yes
Oscilloscope
C742
C702
BOM1 VPCTRL_1900
BOM2 VPCTRL_1900
Yes
Spectrum analyzer
RF-connector
Pout
= +21 dBm, 1880 MHz
Yes
GSM 1900 TX
OK
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IREF_1800_ Vdc >
1900
Mode
Vdc =
R713 Vdc= 0 V
R713 Vdc= 2.7 V
Check PA N700
No Check Power Loop
Nokia Customer Care
xx Volt
2.78 Volt No
Check
Base Band
Issue 2 05/05