VK Corporation VG207 User manual

GSM PHONE
SERVICE MANUAL
MODEL : VG207

ISSUED DATE : 2003-08-23
Rev. 1.0

Table Of Contents
1. Introduction. …………………………………………………………………………………….…….1-1
2. Specification ....................................................................................................... 2-1
2.1 HW Features .............................................................................................................................................. 2-1
2.2 SW Features ............................................................................................................................................... 2-2
3. Disassembly Instruction ................................................................................................................ 3-1
3.1 Before Disassembly ................................................................................................................................... 3-1
3.2 Main Frame ................................................................................................................................................ 3-2
3.3 Folder ......................................................................................................................................................... 3-3
3.4 Exploded View and Parts List ...........................................................................................................…......3-5
3.4.1 Exploded View ..........................................................................................................................….......3-5
3.4.2 Mechanical Parts List ................................................................................................................….......3-6
4. Data Kit & Test Method(Download Procedure) ................................................................ 4-1
4.1 Data Kit ...................................................................................................................................................... 4-1
4.1.1 Download Equipment ..............................................................................................................…....... 4-1
4.1.2 Download Environment.....................................................................................……………………... 4-1
4.1.3 Download Procedure…..........................................................................................................….….... 4-5
5. Trouble Shooting ............................................................................................................................... 5-1
5.1 Power-On Trouble ..................................................................................................................................... 5-1
5.2 Melody Trouble ......................................................................................................................................... 5-2
5.3 LCD Trouble .............................................................................................................................................. 5-3
5.4 Charging Trouble ....................................................................................................................................... 5-4
5.5 Vibrator Trouble ........................................................................................................................................ 5-5
5.6 Backlight Trouble ...................................................................................................................................... 5-6
5.7 SIM Detection Trouble .............................................................................................................................. 5-7
5.8 Ear-Phone Trouble .....................................................................................................................……........ 5-8
5.9 FLIP Detection Trouble .........................................................................................................….......…..... 5-9
5.10 KEY Detection Trouble .......................................................................................................................... 5-10
5.11 7LED Trouble ......................................................................................................................…................5-11
5.12 TX Power Trouble(E-GSM) ....................................................................................................................5-12
5.13 TX Power Trouble(DCS) .........................................................................................................................5-13
5.14 RX Sensitivity Trouble(E-GSM) ............................................................................................................ 5-14

5.15 RX Sensitivity Trouble(DCS) ..................................................................................................................5-19
5.16 BATT Charger Trouble ............................................................................................................................5-22
6. Block Diagram ..................................................................................................................................... 6-1
6.1 Overall ………….. .................................................................................................................................... 6-1
7. Schematic ........................………………............................................................................................... 7-1
7.1 RF PAM Block........................................................................................................................................... 7-1
7.2 RF Main Block........................................................................................................................................... 7-2
7.3 Flash & Audio Block .............................................................................……........................................... 7-3
7.4 Peripheral Block ........................................................................................................…………............... 7-4
7.5 Base Band Block (Ulysse&Nausica) ........................................................................................................ 7-5
7.6 Folder Block ....................................................................................................................……………..... 7-6
7.7 Key Pad Block ................................................................................................................……………...... 7-7
7.8 Battery Charger Block ............................................................................................................…….......... 7-8
8. PCB Diagram ....................................................................................................................................... 8-1
8.1 Main PCB ................................................................................................................................................. 8-1
8.2 Folder PCB ............................................................................................................................................... 8-2
8.3 Key Pad PCB ............................................................................................................................................ 8-3
8.4 Battery Charger PCB..................................................................................................................................8-4
9. Electrical Part List ........................................................................................................................... 9-1
9.1 Main Parts List ......................................................................................................................................... 9-1
9.2 Folder Parts List ..................................................................................................................……............. 9-2
9.3 Key Pad Parts List .........................................................................................................................…........9-3
9.4 Battery Charger Part List ..............................................................................................................……....9-4

1. Introduction
VG207 is a folder type mobile phone with color LCD, operated in the GSM and Digital Cellular Mobile Radio System, which
is the Pan-European mobile cellular standard.
VG207 has the operation band of GSM 900 and DCS 1800. GSM PhaseII features are fully supported and parts of the GSM
Phase II+ features are also supported.
About the SIM Toolkit, VG207 supports up to Class 3 including Class 1, 2. For speech communication, VG207 supports Full
Rate(FR), Enhanced Full Rate(EFR) and Half Rate(HR). For easy text, eZi Text is implemented and WAP protocol is
adopted for internet connection.

2. Specification
2.1 HW Features
Item Description Remark
Supporting standard GSM 900/DCS 1800 (Dual Band)
E-GSM
Phase 2 and Phase 2+
SIM Toolkit : Class 1,2,3
Frequency range E-GSM TX : 880 - 915 MHz
E-GSM RX : 925 - 960 MHz
DCS 1800 TX : 1710 - 1785 MHz
DCS 1800 RX : 1805 - 1880 MHz
Battery 1.Capacity
Standard : Li-ion, 720 mAh
Slim : Li-ion, 620 mAh
Display Fullgraphictype
Dual LCD
-MainLCD UFB-65K Color, Pixels : 128 x 96
-Ext.LCD Mono-B/W, Pixels : 80 x 48
7 Color LED Built-in Incoming Indicator x 3 pcs
Antenna Fixedtype
PC synchronization Applied
Speechcoding FR,EFR,HR
Data & Fax Built-in
Vibrator Built-in
Speaker+Receiver UnifiedType Applied(4pole)
Portable Handsfree (Ear-Phone) Built-in
Travel charger Built-in
Options CigaretteLighterAdapter Someoptionalitemsmaybe
Data communication kit basic items depending on
BatteryCharger country.
Melody Chip Yamaha 40 Poly
FlashMemory Flash:64Mbits
RAM : 32 Mbits

2.2 SW Features
Function DetailItem Comments
Normalfeatures Lastdialednumber 20entry
Last received number 20 entry
Lastmissednumber 20entry
Scratchpadmemory 1
Call CallwaitingYes (networkdependent)
Audio Earpiece volume 5 level
Muteon&Muteoff Yes
Cellbroadcast CBoption On/Off
PhoneBook Readtopics SIM/Phone
Languages S/TChinese&English Availableotherlanguage
Supplementaryservices Callbarring Allcalls
All outgoing calls
All outgoing international calls
All outgoing int. calls except to home country
All incoming calls
All incoming calls when roaming
ShortMessage Writemessage Send/Store
Outputmessage Send/Save/ExtractNumber/
Delete/Delete All
Inputmessage Reply/Forward/Extractnumber/
Delete/Delete All
Statusreport Delete/DeleteAll
Call voicemail
Cellbroadcast CBOption(On/Off)/Read
Topics(SIM/Phone)/Languages
Memory status
Settings Statusreport/Messagetype
Expiry period/SMS center
Voice center/Alert
Multi-band Support of multi-band & mode GSM 900
EGSM
DCS1800

Function DetailItem Comments
Miscellaneous function Development & test facility
Field test facility
Display software version
Textinput Language English
Simplified chinese
Traditional chinese
eZitext Predictivewordinput
Scheduler Viewday
Make Schedule
Call
Memo
Anniversary
Delete
View all
WAP Built in WAP 1.2.1
World time Setting local time
Number of selectable cities 61 Cities
Calculator Operator Addition
Subtraction
Multiplication
Division
Unitconverter Lengthconversion
Weight conversion
Volumes conversion
Surface conversion
Pink schedule
BioRhythm View
with Friend
Special day
Input MyBirthday
Friend’s Birthday
Game 3EA(minimum)
SIMCard Support3V/5VSIM

3. Disassembly Instruction
3.1 Before Disassembly
1. Remove the battery. To do so:
① Pull the battery lock above the battery toward the
top of the phone and hold it in the position.
② Lift the battery away.
2. Remove the SIM card. To do so:
① Slide the ivory lock in the SIM card holder to
unlock the SIM card holder and lift it up.
② Remove the SIM card, then replace the card
holder. Keep the SIM card in a safe place.

Front case
Back case
Key PCB
Main PCB
3.2 Main Frame
1. Remove the two screws on the back of the phone.
2. Insert a small ‘ - ‘ type driver between the front case
and the back case, and lift up the front case.
3. Now, you can replace the PCBs and the other
components.

3.3 Folder
1. Remove the back case as described at Steps 1 and 2
under Main Frame Disassembly on page 3-2.
2. Unplug the connector shown at right from the main
PCB.
3. Unhook the folder from the main frame.
4. Remove the two screws from the folder.

Folder upper
Folder lower
LCD Ass’y
5. Insert a small ‘ - ‘ type driver between the folder
upper and the folder lower, and lift up the folder
upper.
6. Now, you can remove the LCD ass’y and the other
components.

3.4. Exploded View and Parts List
3.4.1 Exploded View
--- 25

3.4.2 Mechanical Parts List
NO. DESCRIPTION Q’TY
1 Battery package 1
2 Battery Locker 1
3 Spring knob 1
4 Rear Case 1
5 Rubber (Ear jack) 1
6 Antenna 1
7 Antenna bracket 1
8 Rubber (Ant-jack) 1
9 SIM connector 1
10 Main PBA 1
11 Shield Can 1
12 Key PBA 1
13 Key pad 1
14 Side key 1
15 Front case 1
16 Indicator ( 7 LED ) 1
17 Magnetic 1
18 LCD Window (SUB) 1
19 Folder (Upper) 1
20 LCD module 1
21 Hinge 1
22 Folder (Lower) 1
23 LCD Window (MAIN) 1
24 Cover screw 2
25 Receiver Badge 1
S1 Rear Case Screw (M1.6 x 5.8) 2
S2 Folder Screw (M1.6 x 3.4) 2

4. Data Kit & Test Method
4.1 Data Kit
4.1.1 Download Equipment
1. Download Cable
2. Desktop or Notebook PC
3. Download monitor program
4. VG207 Mobile Phone
4.1.2 Download Enviroment.
To download software of VG207, the following working environments should be prepared:
• VG207 download cable, Interface JIG, is connected to only COM1 serial port of the desktop or notebook PC.
• VG207 download monitor program is copied to the desktop PC or notebook PC.
• Target software is downloaded to the VG207 mobile phone.
※ Warning
You MUST use the download cable kit (Interface JIG) and UART download Monitor program.
Otherwise,downloading process won’t work properly.

4.1.3 Download Procedure
1. Unzip VG207 UART Download monitor program (monitor701.zip) in the PC.
2. Execute monitor701.exe. And then select Target menu. Then, choose Connect from the Target menu.
< Figure 1 >
3. A table will be displayed as shown in <Figure 2>. Then press the arrow-button and choose a correct serial
port. And press OK button.
< Figure 2 >

4. As the following window shown in <Figure 3> is displayed, connect VG207 phone to the download cable,
(Interface JIG) and press power on key of VG207. If the connection is succeeded, the following screen will
show the contents as shown in <Figure 4>.
< Figure 3 >
< Figure 4 >

5. Click on Flash on the top menu and select Erase and Program Appli+Boot item as shown in <Figure 5>.
< Figure 5 >
6. Choose the target SW that you want to download. And then you can see the following window in
<Fingure 6>.
< Figure 6 >

7. If the downloading procedure is succeeded, then the following window is shown.
< Figure 7 >
8. Press the Disconnect of Target menu, and seperate the phone from Download cable.
< Figure 8 >

5. Trouble Shooting
5.1 Power-On Trouble
Power-on button is not working.
Check the voltage level of battery.
The level is higher than
3.65V.
Check the level of TP516
(ON/OFF).
The level is higher(3V).
Then the phone is powered-on
properly. Check the LCD module.
END
Charge the battery/
Check the battery.
Power-on sequence is not
executed properly. Try again.
If the result is same, change
U501 chipset.
YES
NO
YES
NO