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

2. 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

3. VK Quality Group GSM C/S ☞ 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

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

5. VK Quality Group GSM C/S ☞ Overview VK Mobile Phone is a Slim Bar type mobile phone with color LCD, operated in the GSM and Digital Cellular Mobile Radio System, which is the Pan- European mobile cellular standard. VK Mobile Phone 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, VK Mobile Phone supports up to Class 3 including Class 1, 2. For speech communication, VK Mobile Phone 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. VK Mobile Phone supports GPRS up to Class 10

6. VK Quality Group GSM C/S ☞ Features (HW) CatagorySub-CatagoryDescription DesignDimension89.9 x 49.9 x 8.8 Weight48.6 g with standard battery (TBD) Form FactorSlim Bar AntennaIntenna NetworkRadioGSM, EGSM, GPRS R/F bandDual Band EGSM900, DCS1800 GPRS ClassClass B 10 (4+2) Speech CodecFR, EFR, AMR LCDMain display143 x 128, 1.5" 65K CSTN VideoMPEG4N/A H.263, H.264N/A Video outputN/A AudioSound formatBuzzer Ring tonesYes (1poly Buzzer) Voice support codecAMR (TBD) Data ServiceSMS/EMS/MMSYes WAPVer 2.0 JavaN/A Instant MassageN/A e-mailN/A MemoryNor/SRAM128 Mb / 32 Mb CatagorySub-CatagoryDescription BatteryStandard38 x 43 x 29 (470mAh) ConnectivityRS232CYes USBN/A PC syncronizationN/A OptionTravel charger AdapterYes Ear – MicrophoneYes Battery ChargerYes PC – SyncN/A

7. VK Quality Group GSM C/S ☞ Features (SW) FUNCTIONDETAIL ITEMCOMMENTS Short messageWrite messageSend/Edit/Delete/Delete All/Copy to SIM,Phone(SMS only)/Move to SIM,Phone(SMS only Outbox(unsent items/sent items)Delete/Delete All/ Reply/Forward/Callback/ Copy to SIM,PHONE(SMS only)/Move to SIM,PHONE(SMS only) Reception(On/Off)/Read Inbox Information MessageTopics Edit/Delete) Voice messageListen to Voice Mail/Set Voice Mail Number Memory statusSMS SIM/PHONE Number), Settingsdelivery report, Validity period/SMS center No.(SMS only) FUNCTIONDETAIL ITEMCOMMENTS Normal featuresLast dialed number10 entry Last received number10 entry Last missed number10 entry CallCall waiting YesNetwork dependent AudioEarpiece volume5 level Mute on & Mute offYes Phone book SIM/Phone LanguagesS/T Chinese & English Supplementary servicesCall barring All calls All outgoing calls All outgoing international calls All outgoing int. calls except to home country All incoming calls All incoming calls when roaming Cancel all Call Diverting

8. VK Quality Group GSM C/S ☞ Features (SW) FUNCTIONDETAIL ITEMCOMMENTS Multi-bandSupport of multi-band & modeGSM 900 / DCS1800 Miscellaneous functionTest facility Display software version Text inputLanguageEnglish Simplified Chinese Traditional Chinese T9Predictive word input WAPBuilt inWAP 2.0 EMSBuilt in GPRSBuilt inClass 10 CalendarNew Delete All Schedule List AlarmMorning Call Reminder Memo Edit and view 10 Memos CalculatorOperatorAddition Subtraction Multiplication Division FUNCTIONDETAIL ITEMCOMMENTS Unit converterLength conversion Weight conversion Volumes conversion Surface conversion Temperature conversion World timeSetting local time Number of selectable cities65 Cities Stop Watch SIM Card Support 3V SIM

9. VK Quality Group GSM C/S ☞ Standard Transmitter 1) Rated Output:GSM900 = 2W(Max) DCS = 1W(Max) P-GSMTx = 890~915Rx = 935~960MHz DCSTx = 1710~1785Rx = 1805~1880MHz 3) Radiowave Type:E-GSMTx = 880~915Rx = 925~960MHz 4) Oscillation Mode:PLL Synthesize 5) Modulation Mode:GMSK 6) Frequency Stability:GSM900 = 90Hz DCS = 180Hz 7) Terminal Amp(IC):TQ7M4006 8) Channel Separation:200KHz 9) RF1 Local Oscillation Frequency: EGSM = 1849.8 ~ 1919.8MHz DCS = 1804.9~1879.9MHz 10) IF VCO Frequency:EGSM = 798MHz DCS = 766MHz 11) Multiplying Method:Frequency Multiplying 12) Spurious1G~4G(-30dBm or below from the FTA standard) Receiver 1) Channel Number:E-GSM = 975~1023, 1~124 P-GSM = 1~124 DCS = 512~885 2) Channel Separation:200KHz 3) Oscillation Mode:PLL Synthesize 4) RF2 Local Oscillation Frequency: E-GSM = 1279 ~ 1314MHz DCS = 1327 ~ 1402MHz 5) Intermediate Frequency:100KHz 6) Modulation Mode:GMSK 7) Spurious:1G~4G(-30dbm or below from the FTA standard)

10. VK Quality Group GSM C/S CHAPTER 2. APPEARANCE & CONFIGURATION 1.Appearance 2.Configuration 3.LCD Panel

11. VK Quality Group GSM C/S ☞ Appearance

12. VK Quality Group GSM C/S ☞ Icons

13. VK Quality Group GSM C/S ☞ Icons

14. VK Quality Group GSM C/S ☞ LCD Panel

15. VK Quality Group GSM C/S 1.Assembly Drawings 2.Disassembling Methods CHAPTER 3. ASSEMBLING & DISASSEMBLING

16. VK Quality Group GSM C/S 1. Assembly Drawings 1)Exploded View 2)Mechanical Parts List 3)Ass’y View

17. VK Quality Group GSM C/S ☞ Exploded View & Parts List NO.DESCRIPTIONQ’TY 1Window Main1 2Keypad1 3Deco Front L1 4Deco Front R1 5Case Front1 6Spring Knob1 7Knob Lock1 8Cover Front1 9Main Pba1 10Case Rear1 11Screw(M1.4 x 3.0)4 12Battery Innerpack1 13Case Battery1 14Indicator1 15Cover Earjack1 16Knob Side1 17Intenna1 18Cover Rf1 19Cover Screw2

18. VK Quality Group GSM C/S ☞ Ass’y View Case Front Ass’y

19. VK Quality Group GSM C/S ☞ Ass’y View Folder Lower Ass’y

20. VK Quality Group GSM C/S 2. Disassembling Methods 1)Tools 2)Battery & Rear Case Disassembling 3)Main PCB Disassembling 4)Folder Disassembling

21. VK Quality Group GSM C/S ☞ Tool Preparation 1. Star-shaped(*) Screw Driver 2. Hinge Remover 3. Tweezers 4. Cross-tip(+) Screw Driver Disassembling tools are as below : In disassembling the VK Mobile Phone set, - you must use tools meeting standard specifications. - do not exert excessive force; Otherwise, the phone set may be damaged. 1.1.2.2.3.3.4.4.

22. VK Quality Group GSM C/S Battery & Rear Case Disassembling

23. VK Quality Group GSM C/S ☞ Battery 1.Pull the battery lock toward the bottom of the battery pack and hold it in the position. 2.Lift the battery away.

24. VK Quality Group GSM C/S Turn the screws anticlockwise using cross-shaped screwdriver. ☞ Screws Unscrew four screws on the back of the phone. Use a screwdriver meeting standard specifications to unscrew.

25. VK Quality Group GSM C/S 1.Hold the rear case with one hand while holding the front case with the other hand. 2.Widen a space to make a gap. 3.Hold the knob lock with your hand and then slowly press down the rear case for removal. ☞ Rear Case Exerting excessive force could damage the rear case.

26. VK Quality Group GSM C/S Main PCB Disassembling

27. VK Quality Group GSM C/S ☞ Main PCB 1.Take off Inter Antenna 2.Take off Vibrator and buzzer. 3.Take off the PBA.

28. VK Quality Group GSM C/S ☞ Exploded View

29. VK Quality Group GSM C/S 1.RF Block Diagram 2.BASEBAND Block Diagram CHAPTER 4. BLOCK DIAGRAM

30. VK Quality Group GSM C/S ☞ RF Block Diagram Chip set & Part nameDC(Input voltage)Current(maximum) TRANSCEIVER, SI4210 2.85V TX GSM 125 mA ~ 140mA DCS 120mA ~ 135mA RX108 mA ~ 123mA PAM, TQM7M40063.5V1.8A FEM, ESHS-M085FA2.85V8mA

31. VK Quality Group GSM C/S ☞ BASEBAND Block Diagram

32. VK Quality Group GSM C/S 1.Overall 2.Base Band Block 3.MCP Main Block 4.Peripheral & Key Block 5.Power Mgmt Block 6.RF Block 7.Audio & Video Block 8.Folder Block 9.Battery Charging Block CHAPTER 5. SCHEMATIC

33. VK Quality Group GSM C/S ☞ Overall Structure

34. VK Quality Group GSM C/S ☞ Base Band Block

35. VK Quality Group GSM C/S ☞ MCP Main

36. VK Quality Group GSM C/S ☞ Peripheral Block

37. VK Quality Group GSM C/S ☞ Power Management Black

38. VK Quality Group GSM C/S ☞ RF Block

39. VK Quality Group GSM C/S ☞ Audio & Video Block

40. VK Quality Group GSM C/S ☞ Key & EL Sheet Block

41. VK Quality Group GSM C/S ☞ Battery Charger Block

42. VK Quality Group GSM C/S 1.Main PCB 2.RF Area 3.BASEBAND Area 4.Key Ared CHAPTER 6. PCB DIAGRAM

43. VK Quality Group GSM C/S ☞ Main PCB TopBottom

44. VK Quality Group GSM C/S ☞ RF Area

45. VK Quality Group GSM C/S ☞ BASEBAND Area TopBottom

46. VK Quality Group GSM C/S ☞ Key Area

47. VK Quality Group GSM C/S 1.Power-On Trouble 2.Melody Trouble 3.LCD Trouble 4.Charging Trouble 5.Vibrator Trouble 6.Backlight Trouble 7.SIM Detection Trouble 8.Ear-Microphone Trouble 9.KEY Detection Trouble CHAPTER 7. TROUBLE SHOOTING 1.Power-On Trouble 2.Buzzer Trouble 3.LCD Trouble 4.Charging Trouble 5.Vibrator Trouble 6.Backlight Trouble 7.SIM Detection Trouble 8.Ear-Microphone Trouble

48. VK Quality Group GSM C/S ☞ Power-On Trouble

49. VK Quality Group GSM C/S ☞ Buzzer Trouble

50. VK Quality Group GSM C/S ☞ LCD Trouble

51. VK Quality Group GSM C/S ☞ Charging Trouble Check U501. END START Charging is not working. The battery pack is well contact to the phone. The battery voltage is between 3.4V~4.2V. TA,CLA, DTC voltages are equal to 5.2V/ 400mA. Reassemble battery pack. Check battery pack. When Q501 3pin is High then Q501 1,2,5,6pin is High?. Replace Q501 Check one of TA, CLA and DTC. Re-download S/W. When CHG_IN 5V then Q501 3Pin is High?. YES NO YES NO CASE 1CASE 2 Re-mount J401. J401 connector is well soldered on the PCB. NO YES

52. VK Quality Group GSM C/S ☞ Vibrator Trouble

53. VK Quality Group GSM C/S ☞ Backlight Trouble

54. VK Quality Group GSM C/S ☞ SIM Detection Trouble

55. VK Quality Group GSM C/S ☞ Ear-Microphone Trouble

56. VK Quality Group GSM C/S ☞ Key Detection Trouble

57. VK Quality Group GSM C/S ☞ TX Power Trouble (E-GSM)

58. VK Quality Group GSM C/S ☞ TX Power Trouble (E-GSM)

59. VK Quality Group GSM C/S ☞ TX Power Trouble (DCS)

60. VK Quality Group GSM C/S ☞ TX Power Trouble (DCS)

61. VK Quality Group GSM C/S ☞ TX Power Trouble (GSM 850)

62. VK Quality Group GSM C/S ☞ TX Power Trouble (GSM 850)

63. VK Quality Group GSM C/S ☞ TX Power Trouble (PCS)

64. VK Quality Group GSM C/S ☞ TX Power Trouble (PCS)

65. VK Quality Group GSM C/S ☞ RX Sensitivity Trouble (E-GSM)

66. VK Quality Group GSM C/S ☞ RX Sensitivity Trouble (E-GSM)

67. VK Quality Group GSM C/S ☞ RX Sensitivity Trouble (DCS)

68. VK Quality Group GSM C/S ☞ RX Sensitivity Trouble (DCS)

69. VK Quality Group GSM C/S ☞ RX Sensitivity Trouble (GSM 850)

70. VK Quality Group GSM C/S ☞ RX Sensitivity Trouble (GSM 850)

71. VK Quality Group GSM C/S ☞ RX Sensitivity Trouble (PCS)

72. VK Quality Group GSM C/S ☞ RX Sensitivity Trouble (PCS)

73. VK Quality Group GSM C/S 1.Main Parts List 2.Folder Parts List 3.Battery Charger Parts List APPENDIX. ELECTRICAL PARTS LIST

74. VK Quality Group GSM C/S ☞ Main Parts List VK CODENAME & DESCRIPTIONQ'TYREFERANCE NUMBER HR150000J000RES 1005 0Ω ±5%(J)26 R201,R211,R212,R307,R406, R407,R408,R422,R424,R507, R508,R509,R601,R606,R607, C612,R616,R709,R740,R741, R744,R771,R780,R781,R782, R783 RES 1005 0Ω ±3%1R702 HR1518R0J000RES 1005 18Ω ±5%(J)1R605 HR1524R0J000RES 1005 24Ω ±5%(J)1R612 HR151000J000RES 1005 100Ω ±5%(J)9 R221,R223,R440,R441,R442, R443,R444,R624,R625 HR152200J000RES 1005 220Ω ±5%(J)1R614,R613 HR153000J000RES 1005 300Ω ±5%(J)2R608,R609 RES 1005 360Ω ±5%(J)1R760 HR153300J000RES 1005 330Ω ±5%(J)2R204 HR156800J000RES 1005 680Ω ±5%(J)1R421 HR151001J000RES 1005 1KΩ ±5%(J)4R426,R505,R602,R751 HR151201J000RES 1005 1.2KΩ ±5%(J)1R501 HR152201J000RES 1005 2.2KΩ ±5%(J)2R425,R423 HR153301J000RES 1005 3.3KΩ ±5%(J)1R203 HR154701J000RES 1005 4.7KΩ ±5%(J)5R502,R620,R621,R622,R623 HR153002J000RES 1005 30KΩ ±5%(J)1R770 HR154702J000RES 1005 47KΩ ±5%(J)1R506 HR156802J000RES 1005 68KΩ ±1%(F)1R703 VK CODENAME & DESCRIPTIONQ'TYREFERANCE NUMBER HR151003J000RES 1005 100KΩ ±5%(J)12 R206,R301,R302,R303,R304, R306,R402,R428,R712,R713, R753,R758 HR151203F000RES 1005 120KΩ ±1%(F)1R701 HR151503F000RES 1005 150KΩ ±1%(J)1R705 HR151803J000RES 1005 180KΩ ±5%(J)1R404 HR152403F000RES 1005 240KΩ ±1%(F)1R704 HR152703J000RES 1005 270KΩ ±5%(J)2R401,R420 RES 1005 320KΩ ±5%(J)1R403 HR153303J000RES 1005 330KΩ ±5%(J)1R427 HR151004J000RES 1005 1MΩ ±5%(J)2R205,R504 HR152004J000RES 1005 2MΩ ±5%(J)2R707,R708 HR4F1000J0004-RES ARRAY 100R ±5%(J)2ARR201,ARR202 THERMISTOR 1608 330K1TH701 HC151P20CG8GCAP 1.2pF ±0.25pF COG(G) 50V(8)4C619,C620,C622,C624 HC1510P0JG8GCAP 10pF ±5%(J) C0G(G) 50V(8)1C618 HC1512P0JG8GCAP 12pF ±5%(J) C0G(G) 50V(8)1C621 HC1515P0JG8GCAP 15pF ±5%(J) C0G(G) 50V(8)4C606,C735,C736,C737 HC1527P0JG8GCAP 27pF ±5%(J) C0G(G) 50V(8)2C219,C218 HC1533P0JG8GCAP 33pF ±5%(J) C0G(G) 50V(8)1C611 HC1547P0JG8GCAP 47pF ±5%(J) C0G(G) 50V(8)2C635,C421 HC151800JG8GCAP 180pF ±5%(J) C0G(G) 50V(8)2C609,C623 HC154700JG8GCAP 470pF ±5%(J) C0G(G) 50V(8)2C234,C507 HC156800K78GCAP 680pF ±10%(K) X7R(7) 50V(8)1C601 HC153301K54GCAP 3.3nF ±10%(K) X5R(5) 10V(4)1C237 HC154701K74GCAP 4.7nF ±10%(K) X7R(7) 10V(4)1C235

75. VK Quality Group GSM C/S ☞ Main Parts List VK CODENAME & DESCRIPTIONQ'TYREFERANCE NUMBER HC151002K75GCAP 10nF ±10%(K) X7R(7) 16V(5)4C403,C508,C602,C752 HC152202K75GCAP 22nF ±10%(K) X7R(7) 16V(5)1C629 HC153302K74GCAP 33nF ±10%(K) X7R(7) 10V(4)9 C202,C204,C206,C208,C210, C212,C215,C217,C236 CAP 100nF 6.3V1C710 HC151003ZY5GCAP 100nF +80%,-20%(Z) Y5V(Y) 16V(5)22 C220,C221,C222,C223,C224, C225,C227,C301,C302,C405, C406,C413,C419,C424,C513, C514,C515,C517,C626,C628, C726,C731 HC152203K54GCAP 220nF ±10%(K) X5R(5) 10V(4)9 C201,C203,C205,C209,C211, C213,C214,C216,C525 HC151004K53GCAP 1005 1uF ±10%(K) X5R(5) 6.3V(5)13 C701,C702,C703,C704,C705, C706,C707,C708,C709,C712, C713,C714,C715 1u2C751,C750 HC161004K55GCAP 1608 1uF ±10%(K) X5R(5) 16V(5)1C402,C404,C603 CAP 1608 1uF ±10%(K) X5R(5) 25V(5)4C716,C717,C718,C719 HC162204K54GCAP 1608 2.2uF ±5%(J) 6.3V(3)1C608 CAP 1608C 2.2uF ±5%(J) 6.3V(3)5C502,C503,C504,C505,C512 HC161005M53GCAP 1608 10uF ±20%(M) X5R(5) 6.3V(3)2C604,C509 HC172205M53GCAP 2012 22uF ±20%(M) X5R(5) 6.3V(3)1C510 CAP 2212CC 10uF 10V1C401 HCTB1006M03GTAN_CAP 3327T 100uF ±20%(M) 6.3V(3)1C607 TAN_CAP 1608T 2.2uF ±20%(M) 10V(5)2C746,C745 TAN_CAP 1608T 4.7uF 6.3V1C747 VK CODENAME & DESCRIPTIONQ'TYREFERANCE NUMBER TAN_CAP 1608T 10uF 6.3V5C226,C417,C418,C420,C425 HLIG1002M00GIND_3*3*1 10uH +-20% (coil)1L501 HLC57N50G00GCHIP INDUCTOR(1005), 7.5nH ±2%1L604 HLC524N0G00GCOIL INDUCTOR(1005), 24nH ±2%1L601 HDSRB520S30TDIODE SCHOTTKY BARRIER2D501,D703 DIODE SCHOTTKY BARRIER1D701 SIDE BLUE COLOR LED1D707 HFE110M00000FILTER EMI with ESD 4CHANNEL3F701,F702,F703 HV1550P00000VARISTOR, 1005 size (HIGH SPEED)29 V401,V402,V403,V404,V405, V406,V407,V408,V409,V410, V411,V412,V413,V414,V717, V720,V721,V722,V723,V724, V725,V726,V727,V728,V729, V730,V731,V732,V733 IC BASEBAND WHAT21U201 HICSUY98001AIC AUDIO FILTER1U202 IC MCP 128M FLASH MEMORY+64M PSRAM1U301 IC POWER MANAGEMENT1U501 IC LDO 2.85V 150 mA1U604 HICTQM7M400AIC POWER AMP MODULE1U601 HICSI421000AIC RF TRANSCEIVER1U602 IC FRONT END MODULE1U603 HTD00000EMB9TR DUAL DIGITAL1U605 HICCL765S00AIC LEVEL SHIFTER (uBGA-42pin)1U701 HICSTLC2500AIC BLU DRIVER, QFN-16L, 3x3 size1U705 CONNECTOR 10PIN USB EARJACK1J401

76. VK Quality Group GSM C/S ☞ Main Parts List VK CODENAME & DESCRIPTIONQ'TYREFERANCE NUMBER HCNSSM040001CONNECTOR SIM1J403 CONNECTOR BATTERY, 3pin1J404 HCNRMM840101CONNECTOR RF1J601 VK2000 LCD Module1 CONNECTOR (SOCKET) 20PIN1J703 HTR0DTC114YETR NPN SINGLE2Q703,Q704 TR PNP SINGLE1Q401 HTRNSL12AW0ATR PNP FOR BATTERY OPERATION1Q501 HCT32K768001X-tal, 32.768MHz1X201 1X601 HTS00LS10N2TSIDE PUSH SWITCH2S713,S723 BATTERY BACK UP1BAT401 BUZZER1BUZ1 Antenna PAD2ANT602,ANT601