Nokia NHM-8NX Series Troubleshooting Instructions page 3

Pams technical documentation

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Table of Contents

NHM-8NX

PAMS Technical Documentation

Troubleshooting Instructions

Call testing .................................................................................................................60

List of Figures

Page No

Fig 1 Receiver signal path ...................................................................................................19

Fig 2 Transmitter signal path ...............................................................................................20

Fig 3 Synthesiser..................................................................................................................21

Fig 4 Key component location.............................................................................................22

Fig 5 Power supply configuration........................................................................................23

Fig 6 Supply points at UEM (D200)...................................................................................24

Fig 7 Supply point at Mjoelner (N600) ...............................................................................24

Fig 8 EGSM Receiver fault finding chart ............................................................................26

Fig 9 RX900 I/Q signal waveform ......................................................................................27

Fig 10 GSM1800 receiver fault finding chart......................................................................29

Fig 11 RX1800 I/Q signal waveform ..................................................................................30

Fig 12 RX measurements point at the RX/TX Switch - Z700.............................................31

Fig 13 Measurements points at the RX-Filters – Z601/Z602 ..............................................31

Fig 14 RX I/Q Signals, Baseband shielding can UEM (D200) ...........................................32

Fig 15 TX measuremnet points in the PA ( N700 ) shielding can.......................................32

Fig 16 EGSM900 transmitter fault finding chart.................................................................35

Fig 17 VPCTRL_G & TXC.................................................................................................36

Fig 18 GSM1800 transmitter fault finding chart .................................................................38

Fig 19 VPCTRL_P & TXC ................................................................................................39

Fig 20 VCXO 26 MHz waveform .......................................................................................40

Fig 21 PLL fault finding chart .............................................................................................41

Fig 22 Measurement point for VCXO supply .....................................................................42

Fig 23 Measurement point for VCXO output ......................................................................43

Fig 24 Measurement point for PLL .....................................................................................43

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Issue 1 05/02

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Troubleshooting