Service Manuals, User Guides, Schematic Diagrams or docs for : NOKIA Mobile Phone 8260 06troub
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PAMS Technical Documentation
NSW-4 Series Transceivers
Disassembly &
Troubleshooting
Issue 1 Final E Nokia Mobile Phones Ltd.
Draft 08/00
NSW-4
Disassembly & Troubleshooting PAMS Technical Documentation
AMENDMENT RECORD SHEET
Amendment Date Inserted By Comments
Number
08/00 OJuntune Issue 1
Page 2 E Nokia Mobile Phones Ltd. Issue 1 Final
Draft 08/00
NSW-4
PAMS Technical Documentation Disassembly & Troubleshooting
CONTENTS
Page No
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Baseband Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Alignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Phone is totally dead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Flash programming doesn't work . . . . . . . . . . . . . . . . . . . . . . . 13
Power doesn't stay on or the Phone is jammed . . . . . . . . . . . 14
The phone doesn't register to the network . . . . . . . . . . . . . . . 15
Charging failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
RF Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Abbreviations used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Interface signals between RF and BB/DSP . . . . . . . . . . . . . . . 20
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
General instructions for RX troubleshooting . . . . . . . . . . . . . . 24
Path of the received signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
AMPS RX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
TDMA800RX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
TDMA 1900RX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
General Instructions for TX Troubleshooting . . . . . . . . . . . 31
Path of the transmitted signal . . . . . . . . . . . . . . . . . . . . . . . . 33
Troubleshooting diagrams for TX . . . . . . . . . . . . . . . . . . . . . . . 34
AMPS TX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
TDMA800 TX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
TDMA1900 TX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Power control loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Synthesizers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
19.44 MHz Reference oscillator . . . . . . . . . . . . . . . . . . . . . . 40
58.32 MHz Triple Multiplier . . . . . . . . . . . . . . . . . . . . . . . . . . 40
19.44 MHz oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
VHF VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
AMPS& TDMA800 UHF SYNTHESIZER . . . . . . . . . . . . . . 44
TDMA1900 UHF SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . 45
RF ASIC DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
General Info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
EROTUS ASIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
RX Front ends N701 and N721 . . . . . . . . . . . . . . . . . . . . . . 46
Power Amplifiers N903 & N960 . . . . . . . . . . . . . . . . . . . . . . 47
PENTA regulator N702 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Issue 1 Final Draft E Nokia Mobile Phones Ltd. Page 3
08/00
NSW-4
Disassembly & Troubleshooting PAMS Technical Documentation
TDMA1900 UPCONVERTER N980 . . . . . . . . . . . . . . . . . . . 48
TDMA1900 PLL◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo