Service Manuals, User Guides, Schematic Diagrams or docs for : . Rare and Ancient Equipment Voxtel Mobile Phones VOXTEL VS400 VOXTEL VS400
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Service Manual Rev. 1.0
Product: VS400
Service Level: Level 1 ~Level 4
Version: 1v0
Author: Customer Service Department
CSD Technical Documentation Page1/84
Service Manual Rev. 1.0
1 DOCUMENTATION SCOPE 4
1.1 BRIEF OF VS400 4
1.2 SPECIFICATIONS 4
1.3 BASIC SERVICE 6
1.4 SUPPLEMENTAL SERVICE 6
2 OVERVIEW OF GSM OPERATION 8
2.1 CELLULAR PHONE CONCEPT 8
2.2 GSM-GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS 8
2.3 GSM SYSTEM 9
2.4 SERVICE AREA 11
3 VS400 HARDWARE SPECIFICATIONS 12
3.1 RF SUBSYSTEM 12
3.2 BASE-BAND SUBSYSTEM 14
3.3 BASE-BAND PARTS DETAILS 15
3.4 ACOUSTIC SPECIFICATIONS 27
3.5 CE MARKING 27
3.6 RELATED PERFORMANCE 29
4 CIRCUIT SCHEMATICS 30
4.1 MEMORY CIRCUIT 30
4.2 SIM CARD CIRCUIT 31
4.3 AUDIO CIRCUIT 31
4.4 KEY PAD CIRCUIT 32
4.5 LED CIRCUIT 33
4.6 VIBRATOR CIRCUIT 34
4.7 CHARGER CIRCUIT 34
4.8 LCM CIRCUIT 35
4.9 CAMERA MODULE CIRCUIT 35
4.10 EARPHONE JACK CIRCUIT 36
4.11 FM RADIO CIRCUIT 36
4.12 IRDA REMOTE CONTROL CIRCUIT 37
4.13 MAIN BOARD B2B CONNECTOR CIRCUIT 37
4.14 UPPER BOARD B2B CONNECTOR CIRCUIT 38
4.15 HALL SENSOR CIRCUIT 38
4.16 MINI USB CIRCUIT 38
4.17 RECEIVER CIRCUIT 39
CSD Technical Documentation Page2/84
Service Manual Rev. 1.0
4.18 TRANSCEIVER CIRCUIT 39
5 SOFTWARE DOWNLOAD 40
5.1 SYSTEM REQUIREMENTS 40
5.2 INSERTION OF THE USB2COM DOWNLOAD CABLE 40
5.3 INSTALLATION OF D/L TOOL 40
6 DISASSEMBLY/ASSEMBLY PROCEDURE 42
6.1 INTRODUCTION 42
6.2 RECOMMENDED TOOLS 42
6.3 DISASSEMBLY PROCEDURE 42
6.4 ASSEMBLY PROCEDURE 52
7 TROUBLE SHOOTINGS 53
7.1 GENERAL BUG LIST 53
7.2 TROUBLE SHOOTING ◦ Jabse Service Manual Search 2026 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo