VK Corporation VK2000+ User manual

VK Quality Group GSM C/S
GSM
GSM
SERVICE MANUAL
SERVICE MANUAL
VK2000+
VK2000+

VK Quality Group GSM C/S
•Precise adjustment should be made in a shield box or shield room where spurious
noise has been eliminated.
•When using magnetized tools, note that related magnetic elements may cause
malfunctioning of critical parts(such as IC).
•Use a twisted pair wire of thick type when measuring level. Using such a thick
twisted pair wire could reduce the measurement error as the wire contains less RF
resistance.
•When disassembling the phone set, you must use a driver tool meeting standard
requirements.
•When making repairs with power on after connecting the test package, note that
dangers such as overcurrent, parts deterioration caused by short-circuit may occur.
•Note that PCB land may be detached due to overheating of a soldering iron while
making repairs on board status.
•Any additional devices that cause the change of performance shall not be added
to this phone, as registered.
☞
☞Service Guidelines Service Guidelines

VK Quality Group GSM C/S
☞
☞Table of Contents Table of Contents
Chapter 1. Overview & Features
Chapter 2. Appearance & Configuration
Chapter 3. Assembling & Disassembling Methods
Chapter 4. Block Diagram
Chapter 5. Schematic
Chapter 6. PCB Diagram
Chapter 7. Trouble Shooting
Appendix. Electrical Part List

VK Quality Group GSM C/S
CHAPTER 1.
CHAPTER 1.
OVERVIEW & FEATURES
OVERVIEW & FEATURES
1.
1. Overview Overview
2.
2. Features Features
3.
3. Standard Standard

VK Quality Group GSM C/S
☞
☞Overview Overview
VK Mobile Phone is a Slim Bar type mobile phone with color LCD,
VK Mobile Phone is a Slim Bar type mobile phone with color LCD, operated operated
in the GSM and Digital Cellular Mobile Radio System, which is th
in the GSM and Digital Cellular Mobile Radio System, which is the Pan e Pan- -
European mobile cellular standard.
European mobile cellular standard.
VK Mobile Phone has the operation band of GSM 900 and DCS 1800.
VK Mobile Phone has the operation band of GSM 900 and DCS 1800. GSM GSM
PhaseII
PhaseII features are fully supported and parts of the GSM Phase II+ fea features are fully supported and parts of the GSM Phase II+ features tures
are also supported.
are also supported.
About the SIM Toolkit, VK Mobile Phone supports up to Class 3 in
About the SIM Toolkit, VK Mobile Phone supports up to Class 3 including cluding
Class 1, 2. For speech communication, VK Mobile Phone supports F
Class 1, 2. For speech communication, VK Mobile Phone supports Full ull
Rate(FR
Rate(FR), Enhanced Full ), Enhanced Full Rate(EFR Rate(EFR) and Half ) and Half Rate(HR Rate(HR). For easy text, ). For easy text, eZi eZi Text is Text is
implemented and WAP protocol is adopted for internet connection.
implemented and WAP protocol is adopted for internet connection.
VK Mobile Phone supports GPRS up to Class 10
VK Mobile Phone supports GPRS up to Class 10