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NHM-3
Trouble Shooting PAMS Technical Documentation
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Trouble Shooting .................................................................................................1
Trouble Shooting............................................................................................................ 4
Baseband ......................................................................................................................4
Phone is totally dead ....................................................................................................5
Flash programming doesn't work ................................................................................6
Power doesn't stay on, or phone is jammed ...............................................................9
Display Information: "Contact Service" ....................................................................10
The phone doesn't register to the network or phone doesn't make a call ............... 11
Phone register failure .................................................................................................11
SIM related faults .....................................................................................................14
Charger failure ..........................................................................................................17
RF Troubleshooting ...................................................................................................18
Introduction ................................................................................................................18
RF Measurement points .............................................................................................20
HAGAR RF Can .................................................................................................... 21
Abbreviations in fault finding charts .........................................................................22
RF in general ................................................................................................................ 23
EGSM Receiver ........................................................................................................... 24
General instructions for EGSM RX troubleshooting .................................................24
Fault finding chart for EGSM receiver ......................................................................26
EGSM Signal path ...................................................................................................... 26
RX/TX Switch........................................................................................................ 27
Front-end ................................................................................................................. 27
Hagar ....................................................................................................................... 27
PCN Receiver............................................................................................................... 28
General instructions for PCN RX troubleshooting ....................................................28
Fault Finding Chart for PCN receiver .......................................................................29
PCN Signal Path .......................................................................................................30
Front-end ................................................................................................................. 30
Hagar ....................................................................................................................... 30
EGSM Transmitter....................................................................................................... 31
General instructions for EGSM TX troubleshooting .................................................31
Path of the transmitted EGSM signal ........................................................................31
Faultfinding Chart for EGSM transmitter ..................................................................32
PCN Transmitter .......................................................................................................... 33
Path of the transmitted PCN signal.......................................................................................33
General instructions for PCN TX troubleshooting ....................................................33
Fault finding chart for PCN transmitter .....................................................................34
Synthesiser ................................................................................................................... 35
General instructions for Synthesiser troubleshooting ................................................35
26 MHz reference oscillator ( VCTCXO ) ................................................................35
VCO ..........................................................................................................................35
Fault finding chart for PLL Synthesiser ....................................................................36
PLL Block diagram ....................................................................................................37
Frequency lists ...........................................................................................................38
EGSM...................................................................................................................... 38
PCN ......................................................................................................................... 39
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NHM-3
PAMS Technical Documentation Trouble Shooting
Wintesla Tuning................................................................................................................40
Which RF to tune after repairs ...................................................................................40
RX Calibration ...........................................................................................................41
RX Filter Calibration (Automatic) .............................................................................44
RX AM Suppression (Automatic) .............................................................................46
TX Power tuning ........................................................................................................50
EGSM...................................................................................................................... 50
PCN ......................................................................................................................... 52
TX I/Q Tuning ...........................................................................................................54
Initial set-up EGSM ................................................................................................ 54
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Fig 1 Phone is Totally Dead ................................................................................................6
Fig 2 Flash programming doesn't work...............................................................................8
Fig 3 Flash Programming ....................................................................................................9
Fig 4 Power doesn't stay on, or phone is jammed ...............................................................10
Fig 5 Wintesla Snapshot of MCU Self-tests ........................................................................11
Fig 6 Phone register failure..................................................................................................12
Fig 7 Phone doesn't register to the network ........................................................................14
Fig 8 SIM related faults .......................................................................................................15
Fig 9 SIM card rejected fault (2) .........................................................................................16
Fig 10 Audio faults ..............................................................................................................17
Fig 11 Charger failure..........................................................................................................18
Fig 12 RF Function Diagram ...............................................................................................24
Fig 13 Transmitted EGSM signal ........................................................................................32
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NHM-3
Trouble Shooting PAMS Technical Documentation
3DJH 1RNLD 0RELOH 3KRQHV /WG 2ULJLQDO
NHM-3
PAMS Technical Documentation Trouble Shooting
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