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Troubleshooting PAMS Technical Documentation
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Troubleshooting...................................................................................................1
Abbreviations used......................................................................................................... 7
CMT Troubleshooting..........................................................................................8
Baseband Testpoints ...................................................................................................... 8
Power Schematic - Plots ............................................................................................10
CPU Schematic - Plots ...............................................................................................11
Troubleshooting Charts for CMT ................................................................................ 12
1. Phone is Dead ........................................................................................................12
2. Flash Programming Does Not Work ....................................................................13
2.1 Flash programming diagram (1)....................................................................... 14
2.2 Flash programming diagram (2)....................................................................... 15
3. Phone Stays On or is Jammed ...............................................................................16
3.1 Troubleshooting diagram,ad.3........................................................................... 16
4. Display Information : "Contact Service" ..............................................................17
5. No network found, No Call established .................................................................18
6. Phone does not register to network .......................................................................19
7. Sim Related Errors ...............................................................................................20
7.1 "Insert SIM card" error...................................................................................... 20
7.2 "SIM card rejected" error ................................................................................. 21
8. Audio Faults.......................................................................................................... 22
9. Charging Error .......................................................................................................24
RF Troubleshooting.......................................................................................... 25
RF Key Component Placement.................................................................................... 26
RF Component Locations ............................................................................................ 27
GSM900 Receiver Troubleshooting ............................................................................ 29
General instructions for GSM900 RX troubleshooting .............................................29
10.Troubleshooting chart for GSM900 receiver ........................................................31
GSM900 Signal path ..................................................................................................31
RX/TX Switch......................................................................................................... 31
Front-end ................................................................................................................. 32
Hagar ....................................................................................................................... 32
GSM1800 Receiver Troubleshooting .......................................................................... 33
General instructions for GSM1800 RX troubleshooting ...........................................33
11. Troubleshooting chart for GSM1800 receiver .....................................................35
PCN Signal path ........................................................................................................36
RX/TX Switch......................................................................................................... 36
Front-end ................................................................................................................. 36
Hagar ....................................................................................................................... 37
GSM900 Transmitter ................................................................................................... 37
General instructions for GSM900 TX troubleshooting .............................................37
Troubleshooting for GSM900 transmitter .................................................................39
Troubleshooting in output power ............................................................................ 39
Troubleshooting modulation ................................................................................... 41
PCN Transmitter .......................................................................................................... 43
12. General instructions for PCN TX troubleshooting ..............................................43
13. Troubleshooting chart for PCN transmitter .........................................................44
Synthesizer ................................................................................................................... 45
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General instructions for Synthesizer troubleshooting ................................................46
26 MHz reference oscillator ( VCTCXO ) ................................................................46
Measuring on the VCTCXO component................................................................. 46
Measuring on the VCTCXO buffer......................................................................... 47
VCO ...........................................................................................................................47
14. Troubleshooting chart for PLL Synthesizer ........................................................48
14.1 Dead phone troubleshooting............................................................................ 49
Frequency lists ...........................................................................................................50
Hagar and serial interface ............................................................................................ 63
UI Module Troubleshooting ..............................................................................66
Troubleshooting method .............................................................................................. 66
Display Module .........................................................................................................67
LCD/Keyboard Backlight ..........................................................................................67
LCD Backlight ........................................................................................................ 67
Keyboard Backlight................................................................................................. 67
Keyboard/Hotkeys Functions ....................................................................................67
Music Player Function ...............................................................................................68
Line-In Recording Function ......................................................................................68
FMR Function ............................................................................................................69
FMR Recording Function ..........................................................................................70
Phone Audio Routing Function .................................................................................71
USB Connectivity Function .......................................................................................72
Appendix A: UI Module Voltages And Current Consumption ................................... 73
Appendix B: Signals on oscilloscope screen ............................................................... 74
Appendix C: Troubleshooting flow charts................................................................... 78
15. General UI troubleshooting .................................................................................78
16. Display module malfunction ................................................................................79
17. No backlight in LCD or keyboard .......................................................................80
18. Keyboard or hot keys do not respond ..................................................................81
19. No audio in Music Player ....................................................................................82
20. No FM audio or manual FM tuning malfunction ................................................83
21. FM recording not possible ...................................................................................84
22. Stereo audio malfunction .....................................................................................85
23. Stereo headset microphone malfunction ..............................................................86
24. Mono headset malfunction ..................................................................................86
25. Phone speaker malfunction ..................................................................................87
26. Phone microphone malfunction ...........................................................................88
27. USB detection malfunction ..................................................................................89
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Fig 1 Topside Components ..................................................................................................8
Fig 2 Bottom Side Components...........................................................................................8
Fig 3 Power test points.........................................................................................................10
Fig 4 CPU test points ...........................................................................................................11
Fig 5 Flash programming.....................................................................................................11
Fig 6 .Dead phone ................................................................................................................12
Fig 7 Flash programming troubleshooting...........................................................................14
Fig 8 Flash programming troubleshooting 2........................................................................15
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PAMS Technical Documentation Troubleshooting
Fig 9 Jammed phone. ...........................................................................................................16
Fig 10 MCU Self Test window............................................................................................17
Fig 11 Phone not registering to network..............................................................................19
Fig 12 SIM error 1 ...............................................................................................................20
Fig 13 SIM card error 2 .......................................................................................................21
Fig 14 8.1 Internal earpiece .................................................................................................22
Fig 15 8.2 Internal microphone............................................................................................22
Fig 16 External earpiece ......................................................................................................23
Fig 17 8.4 External microphone ..........................................................................................23
Fig 18 No detection of charger ............................................................................................24
Fig 19 Not Charging" message ............................................................................................24
Fig 20 RF Component Locations 1......................................................................................27
Fig 21 RF Component Locations 2......................................................................................28
Fig 22 RF Controls window.................................................................................................30
Fig 23 EGSM Faut tree ........................................................................................................31
Fig 24 RF Controls PCN......................................................................................................33
Fig 25 PCN oscilloscope screen shot...................................................................................34
Fig 26 PCN fault tree ...........................................................................................................35
Fig 27 PCN oscilloscope screen shot...................................................................................35
Fig 28 PCN Signal path .......................................................................................................36
Fig 29 RF controls window .................................................................................................38
Fig 30 Measurement points..................................................................................................39
Fig 31 Measuremet points 2.................................................................................................40
Fig 32 Oscilloscope screen shots .........................................................................................41
Fig 33 Oscilloscope screen shots, TX IQ ............................................................................41
Fig 34 Oscilloscope screen shots .........................................................................................42
Fig 35 PCN TX troubleshooting ..........................................................................................43
Fig 36 PCN TX RF control window ....................................................................................43
Fig 37 PCN TX troubleshooting ..........................................................................................44
Fig 38 VCTXO measurement points ...................................................................................45
Fig 39 VCTCXO signal .......................................................................................................46
Fig 40 VCTCXO buffer signal ............................................................................................47
Fig 41 PLL synthesizer troubleshooting1............................................................................48
Fig 42 PLL synthesizer troubleshooting 2...........................................................................49
Fig 43 SCLK clock signal....................................................................................................63
Fig 44 SENA enable signal..................................................................................................63
Fig 45 SDATA data signal...................................................................................................64
Fig 46 HAGAR _RESET_X hagar reset "on"....................................................................64
Fig 47 MCU Clock Waveform