Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung GSM Samsung SGH-P940 service manual
<< 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 Samsung SGH-P940 service manual documenatation <<
Text preview - extract from the document
GSM TELEPHONE
SGH-P940
GSM TELEPHONE CONTENTS
1. Safety Precautions
2. Specification
3. Product Function
4. Array course control
5. Exploded View/Disassembly
and Assembly Instructions
6. MAIN Electrical Parts List
7. Block Diagrams
8. PCB Diagrams
9. Flow Chart of Troubleshooting
10. Reference data
CONTENTS
1. Safety Precautions
1-1. Repair Precaution......................................................................................................1-1
1-2. ESD(Electrostatically Sensitive Devices) Precaution...............................................1-2
2. Specification
2-1. GSM General Specification.......................................................................................2-1
2-2. GSM Tx Power Class...............................................................................................2-2
3. Product Function
4. Array course control
4-1. Software Adjustments................................................................................................4-1
4-2. Software Downloading...............................................................................................4-2
5. Exploded View/Disassembly & Assembly Instructions
5-1. Cellular phone Exploded View ................................................................................5-1
5-2. Cellular phone Parts list............................................................................................5-2
5-3. Disassembly & Assembly Instructions......................................................................5-4
6. MAIN Electrical Parts List
7. Block Diagrams
8. PCB Diagrams
CONTENTS
9. Flow Chart of Troubleshooting
9-1. Power ON..................................................................................................................9-1
9-2. Initial...........................................................................................................................9-4
9-3. Sim Part.....................................................................................................................9-8
9-4. Speaker Part(Melody)..............................................................................................9-11
9-5. Microphone Part.......................................................................................................9-14
9-6. Key Data Input........................................................................................................9-16
9-7. Receiver Part...........................................................................................................9-17
9-8. Back Light (for Color Main LCD)...........................................................................9-19
9-9. Key Back Light........................................................................................................9-22
9-10. Camera Part...........................................................................................................9-24
9-11. GSM Receiver........................................................................................................9-27
9-12. GSM Transmitter....................................................................................................9-29
9-13. DCS Receiver........................................................................................................9-32
9-14. DCS Transmitter....................................................................................................9-34
9-15. PCS Receiver.........................................................................................................9-37
9-16. PCS Transmitter.....................................................................................................9-39
9-17. WCDMA Receiver..................................................................................................9-42
9-18. WCDMA Transmitter..............................................................................................9-44
9-19. DVB-H.....................................................................................................................9-46
10. Reference data
1. Safety Precautions
1-1. Repair Precaution
Repair in Shield Box, during detailed tuning.
Take specially care of tuning or test, because specipicty of cellular phone is sensitive for
surrounding interference(RF noise).
Be careful to use a kind of magnetic object or tool, because performance of parts is damaged by
the influence of magnetic force.
Surely use a standard screwdriver when you disassemble this product, otherwise screw will be
worn away.
Use a thicken twisted wire when you measure level.
A thicken twisted wire has low resistance, therefore error of measurement is few.
Repair after separate Test Pack and Set because for short danger (for example an
overcurrent and furious flames of parts etc) when you repair board in condition of connecting Test
Pack and tuning on.
Take specially care of soldering, because Land of PCB is small and weak in heat.
Surely tune on/off while using AC power plug, because a repair of battery charger is dangerous
when tuning ON/OFF PBA and Connector after disassembling charger.
Don't use as you pleases after change other material than replacement registered on SEC System.
Otherwise engineer in charge isn't charged with problem that you don't keep this rules.
1-1
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Safety Precautions
1-2. ESD(Electrostatically Sensitive Devices) Precaution
Several semiconductor may be damaged easily by static electricity. Such parts are called by ESD
(Electrostatically Sensitive Devices), for example IC,BGA chip etc. Read Precaution below.
You can prevent from ESD damage by static electricity.
Remove static electricity remained your body before you touch semiconductor or parts with
semiconductor. There are ways that you touch an earthed place or wear static electricity prevention
string on wrist.
Use earthed soldering steel when you connect or disconnect ESD.
Use soldering removing tool to break static electricity. , otherwise ESD will be damaged by static
electricity.
Don't unpack until you set up ESD on product. Because most of ESD are packed by box and
aluminum plate to have conductive power,they are prevented from static electricity.
You must maintain electric contact between ESD and place due to be set up until ESD is
connected completely to the proper place or a circuit board.
1-2
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
2. Specification
2-1. GSM General Specification
EG SM9 00 DCS1800 PCS1900 W-CDMA
Fr eq.
8 90~915 17 10~178 5 18 50~191 0 192 0~1980
Band[MHz]
9 35~960 18 05~188 0 19 30~199 0 211 0~2170
Uplin k/Down link
0~ 124 & UL:96 12~988 8
ARF CN ra nge 5 12~885 5 12~810
97 5~1023 DL:105 62~108 38
T x/Rx spacing 45MHz 95MHz 80MHz 1 90MHz
Mo d. Bit r ate/ 270 .833kb ps 270 .833kb ps 270 .833kb ps
3.8 4Mcps
Bit Period 3 .692u s 3 .692u s 3 .692u s
Ti me Slo t
5 76.9u s 5 76.9u s 5 76.9u s
Pe rio d/Fr am e Fr ame len gth : 10ms
4. 615ms 4. 615ms 4. 615ms
Per iod
Q PS K
Modula tion 0 .3G M SK 0 .3G MSK 0 .3G M SK
HQPSK
MS Power 33d Bm~5dBm 30d Bm~0dBm 30d Bm~0dBm 24 dBm ~ - 50dBm
4 1 1 3
Powe r Class
(max +33dBm) (max +30dBm) (max +30dBm) (max + 24dBm)
Se nsitivity -10 2dBm -10 0dBm -10 0dBm -1 06.7d Bm
TDMA Mu x 8 8 8
Cell Radiu s 35Km 2Km 2Km 2Km
2-1
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Specification
2-2. GSM TX power class
TX Power TX Power TX Power
GSM900 DCS1800 PCS1800
control level control level control level
5 33◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo