Service Manuals, User Guides, Schematic Diagrams or docs for : NOKIA Mobile Phone Nokia_6250 troubleOriginal
<< Back | HomeMost service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.
Image preview - the first page of the document
>> Download troubleOriginal documenatation <<
Text preview - extract from the document
3URJUDPPHV $IWHU 0DUNHW 6HUYLFHV
1+0 6HULHV 7UDQVFHLYHUV
7URXEOH 6KRRWLQJ
2ULJLQDO 1RNLD 0RELOH 3KRQHV /WG
NHM-3
Trouble Shooting PAMS Technical Documentation
7DEOH RI &RQWHQWV
3DJH 1R
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
3DJH 1RNLD 0RELOH 3KRQHV /WG 2ULJLQDO
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
/LVW RI )LJXUHV
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
2ULJLQDO 1RNLD 0RELOH 3KRQHV /WG 3DJH
NHM-3
Trouble Shooting PAMS Technical Documentation
3DJH 1RNLD 0RELOH 3KRQHV /WG 2ULJLQDO
NHM-3
PAMS Technical Documentation Trouble Shooting
7URXEOH 6KRRWLQJ
%DVHEDQG
7KH IROORZLQJ KLQWV VKRXOG PDNH LW HDVLHU WR ILQG WKH FDXVH RI WKH SUREOHP ZKHQ WKH FLU
FXLWU\ VHHPV WR EH IDXOW\ 7KLV WURXEOH VKRRWLQJ LQVWUXFWLRQ LV GLYLGHG LQWR WKH IROORZLQJ
VHFWLRQV
3KRQH LV WRWDOO\ GHDG
)ODVK SURJUDPPLQJ GRHVQ◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo