Service Manuals, User Guides, Schematic Diagrams or docs for : . Rare and Ancient Equipment Pantech Mobile Phones PANTECH GF200 PANTECH GF200
<< 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 PANTECH GF200 documenatation <<
Text preview - extract from the document
GF200 Service Manual GF200
GF200 Service Manual
(GSM Cellular Phone)
Pantech Co., Ltd., Korea
June 28, 2004
1st Edition
For Use by Authorized Service/Maintenance Personal Only
Documents to Receive This Addendum:
GF200 Maintenance/Repair/Operating Manual
GF200 Service Manual
CONTENTS
SECTION 1 INTRODUCTION .............................................................................................................3
1.1 INTRODUCTION ..............................................................................................................................3
1.2 FREQUENCY ALLOCATION AND ITS USE ...........................................................................................3
1.3 ITEM NAME AND USE .....................................................................................................................4
1.4 CHARACTERISTICS ........................................................................................................................4
SECTION 2 ELECTRICAL SPECIFICATIONS....................................................................................5
2.1 GENERAL ......................................................................................................................................5
2.2 TRANSMITTER..........................................................................................................5
2.3 RECEIVER...............................................................................................................5
SECTION 3 OPERATION....................................................................................................................6
3.1 NAME OF EACH PART...................................................................................................6
3.2.DISPLAY ..................................................................................................................7
3.3 KEYPAD ................................................................................................................7
SECTION 4 THEORY OF OPERATION..............................................................................................8
4.1 LOGIC SECTION ........................................................................................................................8
4.1.1 DC DISTRIBUTION AND REGULATION PART......................................................................8
4.1.2 LOGIC PART..........................................................................................................8
4.1.2.1 SUMMARY..........................................................................................................9
4.1.2.2 BASEBAND DIGITAL SIGNAL PROCESSING...................................................................10
4.1.3 MEMORY PART.....................................................................................................12
4.1.4 NOTIFICATION PART ..................................................................................................................13
4.1.5 KEY PAD PART .........................................................................................................................13
4.1.6 LCD MODULE(DISPLAY PART) ..................................................................................................13
4.2 RADIO TRANSCEIVER SECTION.....................................................................................................14
4.2.1 DC DISTRIBUTION AND REGULATION PART .................................................................................15
4.2.2 TRANSCEIVER PIN DESCRIPTION.......................................................................15
4.2.3 RECEIVE SECTION.................................................................................................17
4.2.3.1 AN OVERVIEW OF RECEIVE SECTION ......................................................................................17
4.2.3.2 RECEIVER PART.................................................................................................18
4.2.4 TRANSMIT SECTION ..................................................................................................................19
4.2.4.1 AN OVERVIEW OF TRANSMIT SECTION ....................................................................................19
4.2.4.2 TRANSMITTER PART...............................................................................................................20
4.2.5 OFFSET PLL.........................................................................................................22
4.2.5.1 AN OVERVIEW OF OFFSET PLL............................................................................................22
4.2.5.2 VCTCXO(VOLTAGE CONTROLLED TEMPERATURE COMPENSATED CRYSTAL OSCILLATOR):V801....23
SECTION 5 ALIGNMENT PROCEDURE..........................................................................................24
5.1 RECOMMENDED TEST EQUIPMENT ...............................................................................................24
5.2 CONNECTION OF TEST EQUIPMENT ..............................................................................................24
SECTION 6 EQUIPMENT REPAIR PROCEDURE ...........................................................................25
6.1 NO POWER ON WITH BATTERY APPLIED ..........................................................................................25
6.1.1 POWER CHECK.........................................................................................................................25
6.1.2 OSCILLATION CHECK ...............................................................................................................28
6.1.3 KEYPAD LED NOT IN OPERATION ...............................................................................................29
6.1.4 STATUS LED ................................................................................................. ...30
6.2 AUDIO PART(EARPIECE, HANDS FREE EARPHONE, MICROPHONE, HANDS FREE MIC)..................31
6.2.1 NO RECEIVING TONE HEARD (EARPIECE) .................................................................................31
6.2.2 SIDETONE NOT TRANSMITTED (MIC) ........................................................................................33
6.2.3 SIDETONE NOT TRANSMITTED (HANDS FREE MIC) .....................................................................33
6.2.4 HOOK SWITCH NOT WORKING .................................................................................................34
6.2.5 MELODY NOT RINGING ............................................................................................................35
6.2.6 VIBRATOR NOT WORKING .................................................................................37
1
PANTECH R&D CONFIDENTIAL
GF200 Service Manual
6.3 SIM CARD PART .................................................................................................38
6.3.1 SIM ERROR .......................................................................................................38
6.4 CHARGER PART..................................................................................................39
6.4.1 CHARGING ERROR ...............................................................................................39
6.5 CAMERA SENSOR PART... ...................................................................................41
6.5.1 CAMERA PREVIEW ERROR............................. ...................................................41
6.6 RF PART............................................................................................................. 43
6.6.1 TEST CONDITIONS........................................................................... .....................43
6.6.2 POWER SUPPLY CHECK POINT..................................................................................44
6.6.3 POWER AMPLIFIER MODULE ....................................................................................46
6.6.4 VCTCXO..............................................................................................................48
6.6.5 ANTENNA SWITCH MODULE.......................................................................................49
2
PANTECH R&D CONFIDENTIAL
GF200 Service Manual
SECTION 1. Introduction
1.1 An Introduction of GSM Digital Cellular Mobile Communication System
GSM (Global System for Mobile communication) concluded that digital technology working in
the Time Division Multiple Access (TDMA) mode would provide the optimum solution for the
future system. Specifically , a TDMA system has the following advantage
Offers a possibility of channel splitting and advanced speech cGF200g ,resulting in improved
spectrum efficiency.
Allows considerable improvements to be made with regards to the protection of information.
The GSM system is basically designed as a combination of three major subsystem;
The network subsystem, the radio subsystem, and the operation support system.
The functional architecture of a GSM system can be divided into the Mobile Station (MS), the Base
Station (BS), and the Network Subsystem (NS). The MS is carried by the subscriber, the BS
subsystem controls the radio link with the MS and the NS performs the switching of calls between
the mobile and other fixed or mobile network users as well as mobility management. The MS and
the BS subsystem communicate across the Um interface also known as radio link
The specifications relating to MS are as follows:
TS 100 607-1 : Digital cellular telecommunication system(Phase2+)Mobile Station (MS) con
Formance specification Part1:Conformance specification
1.2 Frequency Allocation and Its Use
Transmit frequency band : 880 MHz ~ 915 MHz(For EGSM) , 1710 MHz ~ 1785 MHz(For DCS)
1850 MHz ~ 1910 MHz(For PCS1900)
Receive frequency band: 925 MHz ~ 960 MHz(For EGSM) , 1805 MHz ~ 1880 MHz(For DCS)
1930 MHz ~ 1990 MHz(For PCS1900)
Channel spacing : 200 KHz
ARFCN(Absolute Radio Frequency Channel Number) : 1~124 and 975~1023 (For EGSM),
512~885 (For DCS), 512~810 (For PCS1900).
Separation between Transmit and Receive channels [MHz] : EGSM ;45 MHz, DCS ;95 MHz,
PCS ;80
3
PANTECH R&D CONFIDENTIAL
GF200 Service Manual
1.3 Item Name and Usage
GF200, GSM digital cell phone, is supercompact, superlight mobile communication terminal for
personal use. It has a GSM 900MHz and DCS 1800MHz/PCS 1900MHz frequency band and
adopts GSM and DCS/PCS mode having excellent spectrum efficiency, economy, and portability.
This product is GSM Cellular type portable phone, adopting 1-cell Li-ion battery and power saving
circuit to maximize its operation time. Also, it is equipped with a fixed antenna and its color LCD with
font built in enables both Chinese and English text service. And power control(basic feature of GSM),
security feature, voice symbol feature, and variable data rate feature are used appropriately to
ensure its best performance. This product consists of a handset, battery pack, and Travel charger.
1.4 Characteristics
1) All the active devices of GF200 are made of semiconductors to ensure excellent performance
and semi-permanent use.
2) Surface mounting device (SMD) is used to ensure high reliability, compactness and lightness.
3) GF200 adopts the Silabs's AERO RF transceiver, which is CMOS RF front-end for multi-band
GSM digital cellular handsets. The Aero's highly-integrated architecture eliminates the IF SAW
filter, low noise amplifiers (LNAs) for three bands, transmit and RF voltage-controlled oscillator
(VCO) modules, and more than 60 other discrete components found in conventional GSM
handsets to deliver smaller, more cost effective GSM solutions that are easier to design and
manufacture.
4) GF200 is designed to perform excellently even in the worst environment
4
PANTECH R&D CONFIDENTIAL
GF200 Service Manual
Section 2. Electrical Specifications
2.1 General E-GSM / DCS 1800/PCS1900
Mobile Transmit Frequency[MHz] 880 ~ 915 /1710 ~ 1785/ 1850 ~ 1910
Mobile Receive Frequency[MHz] 925 ~ 960 /1805 ~ 1880/ 1930 ~ 1990
Multiplex number 8
The Number of Channels 174 / 375 / 299
Channel Spacing 200 kHz
Power Supply Rechargeable Li-Ion Battery 3.7V/680mAh
Operating Temperature -10 +55
Dimension 81(H) ◦ Jabse Service Manual Search 2026 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo