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DBTEL DB-6568 Service Manual

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2003.11.13
DB-6568 Service Manual Level 1 ~ 3
DBTEL Copyright
Reserved
1
DBTEL Incorporated

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Summary of Contents for DBTEL DB-6568

  • Page 1 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved DBTEL Incorporated...

  • Page 2: Table Of Contents

    2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved DB6568 Level 1 ~ 3 Sevice Manual 2003/11/13 ä› Ä¿ General Introduction ..........................4 Safety Notes ..........................4 1.2.1 Handheld..........................4 1.2.2 Mobile/Portable– Vehicle ......................4 1.2.3 General safe notes ........................5 2.
  • Page 3 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Function Test and Verification......................64 6. Accessories DBTEL Incorporated...

  • Page 4: General

    2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved 1. General Introduction Safety Notes 1.2.1 For Handset Users 1.2.2 For M obility/Portability Phone Users – When Used in Vehicles 1.2.3 General Safety Notes DBTEL Incorporated...

  • Page 5: Handheld

    This manual is intended for technicians who are familiar with similar type of such device. It contains all necessary service information for the device set forth below. The purpose of this document is to provide the users with basic information on DB-6568, and also to provide the repairing procedures up to Level 3.¡£...

  • Page 6: General Safe Notes

    Mobile telephone will automatically transmit or receiving signal if it is not turned off even in standby mode. Refer to the related section of the user manual for this product for additional related safety information. All equipment should only be serviced/repaired by DBTEL qualified technician. DBTEL Incorporated...

  • Page 7: Db6568 Introduction

    2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved 2.DB-6568 Introduction 1.3 DB-6568 Cosmetic Diagram 1.4 Specifications List 1.5 Electrical Specifications List DBTEL Incorporated...
  • Page 8 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved 2. DB-6568 Introduction 2.1 DB6568 Cosmetic Diagram DBTEL Incorporated...

  • Page 9: Phone Book

    2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved 2.2 DB-6568 Specification List Item Reference Specification Size = 55 cc with Standard battery pack Weight = 70gr ± 10% with Standard battery pack Plastic Material ABS or ABS-PC Power Supply 3.8V nominal, 3.4V minimum...
  • Page 10 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved 2.3 Electrical Specifications List Item Reference Specification Channel Bands GSM900 Transmitted Bands GSM900 Received Bands 880 – 915 MHz DCS1800 Transmitted 925 – 960 MHz Bands 1710-1785MHz DCS1800 Received Bands...

  • Page 11: Function List

    2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved 3.Function List Useful Function List DB6568 3. Menu Tree Table DBTEL Incorporated...
  • Page 12 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved 3.1 Menu Tree function Table Screen Call Meters Phone Books Function LIST Mode ·þÎñ Date&Ti Setting Extras Message DBTEL Incorporated...
  • Page 13 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Phone book Search Edit Save Delete Copy Group setting Send Add New Group Setting Family Friend Workmate Others Copy Manual Select Erase Original Keep Original Auto Select SIM All...

  • Page 14: Settings

    2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Screen Wallpapers Chang Everyday Activate Settings Activate Settings Background Blue Gray Green Orange Pink Purple Rainy Cream Sand Contrast Level 1 – 5 Back-light Duration 10 Seconds 15 Seconds...
  • Page 15 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Date & Time Alarm Once Set Time Everyday Set Time Calendar Set Date Date & Time Set Date Set Time Display Mode No Display Date Only Time Only Date & Time...
  • Page 16 Menu Map Settings Normal Settings Language English ·± ów ÖÐ ÎÄ ¼òÌåÖÐÎÄ Input Method Upper Case Lower Case Smart English Number Input Voice Volume Earpiece Volume Earphone Volume Key Lock Auto Keypad Lock Now Anykey Answer Auto Answer Factory Settings Call Settings Own Number Sending Off...
  • Page 17 Menu Map Network Settings Preferred Register Delete Move Add Available Select Mode Auto Search Manual Search Security Settings Pin Lock Change PIN Change PIN2 Phone Lock Change Code Short Cut Key Up Key Long Down Key Long Left Key Long Right Key Long Extras Calculator...

  • Page 18: Wap

    Empty Cache Settings Profiles China Mobile China Unicom WAP Profiles 3 Features Image Download Character Set Bearer History The availability depends on your network service provider. 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 18 of 66...

  • Page 19: Disassembly & Assembly

    DBTEL Incorporated 4.Disassembly & Assembly 4.1 Introduction To Disassembly & Assembly 4.2 Tool Required 4.3 Exploding Diagram &Parts List 4.4 Disassembly Steps 4.5 Assembly Steps 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 19 of 66...
  • Page 20 4. Disassembly & Assembly 4.1Introduction To Disassembly & Assembly DB-6568 Housings: are tightened by 4 screw nuts in Battery Slot¡£ The LCD is very fine part and easy to be broken, so be careful when disassemble it¡£ You must put on completely electrostatic protection wrist ring when disassemble and assemble any handset¡£...
  • Page 21 DBTEL Incorporated 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 21 of 66...
  • Page 22 2. Take Off Screw Nuts. 3. Open From Rear Housing. 4. Disassemble Hooks On Both Sides 5. Take Off Ear Phone Cover. 6. Take Off PCBA. 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 22 of 66...
  • Page 23 DBTEL Incorporated 7. Take Off Microphone. 8. Take Off Rubber Keypad. 9. Take Off Receiver. . Complete Disassembly Steps. 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 23 of 66...
  • Page 24 F/R housings. 4.5 Assembly Steps DB6568 1.Attach LCD Sponge On Fro 2. Mount Receiver, place as shown. /Housing 3. Mount Rubber Keypad. 4. Mount Microphone. 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 24 of 66...
  • Page 25 5. Ear Phone Jack Mounted as shown 7. Close Up F/R Housing¡£ 8. Tightened 4 Screw Nuts. 9. Fix cover of srew and light pillar 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 25 of 66...
  • Page 26 5. Be sure that you don’ t make Vibrator connector wire broken. 6. Never use the worn screws or used screws to secure the phone. 7. Always perform the acoustic test after reassembling. 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 26 of 66...

  • Page 27: Introduction Of Db6568 Troubleshooting

    5.3 DB6568 Mechanical Repair 5.4 Manual Test 5.5 Basic Module Failure Analysis 5.6 Troubleshooting Procedure 5.7 Testing Items After Repairing 5.8 Software Upgrading 5.9 Functional Test and Verification 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 27 of 66...
  • Page 28 QC components or parts. Some of the digital handsets will not function properly as it does not comply with GSM system. 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved...
  • Page 29 For an experienced technician, such critical information can help him to find out the possible cause and defected components or parts effectively. ¶þ ¡¢ Recording the type of malfunction 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 29 of 66...
  • Page 30 Most of the defects are possibly caused by power supply. Ê® ¡¢ Checking software performance Ê® Ò» ¡¢ Check that the audio tone input/output port, SIM card, ringer, keypad, LCD 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 30 of 66...
  • Page 31 Ê® ¶þ ¡¢ Always follow the standard procedures for handset assembling/disassembling. For assembling/disassembling process, refer to chapter 4. Ê® Èý ¡¢ Keep a repairing record. 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 31 of 66...
  • Page 32 Do not wear chemical fiber clothes that will generate electric static. Do not let solder iron idle for a long time and it will make iron to be oxidizing. 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved...

  • Page 33: Sw Upgrade

    DBTEL Incorporated 5.2 DB6568 Introduction to troubleshooting DB-6568 troubleshooting is divided into 3 levels£¬ contents are as follows£º Ò» ¡¢ 1st level£º Cannot disassemble screw nuts of mobile. a. To change battery Check Battery voltage is lower than 3.0 V£¬ and it results in that mobile not power on.
  • Page 34 For mechanical assembling and disassembling procedures, refer to chapter 4. Manual Test Manual test function provided in DBTEL GSM mobile phone is intended to assist service/repair technician with service procedures. Before entering manual test command, service/repair technician should obtain a DBTEL GSM mobile phone test card for manual test checking.
  • Page 35 Option: Change audio loop 2: Microphone - Handfree 3 : Auxmic - Earpiece 4 : Auxmic - Headset 5: Auxmic - Handfree Change LCD Contrast 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 35 of 66...
  • Page 36 DBTEL Incorporated 5.5 Basic Module Failure Analysis 1. PCB Overview +1.1 Main Board Top Side Overview +1.2 Main Board Bottom Side Overview 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 36 of 66...
  • Page 37 DBTEL Incorporated 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 37 of 66...
  • Page 38 DBTEL Incorporated 2.1 Clock Block Diagram 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 38 of 66...
  • Page 39 DBTEL Incorporated 2.2 Base Band Block Signal Diagram 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 39 of 66...
  • Page 40 DBTEL Incorporated 2.3 RF Block Diagram 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 40 of 66...
  • Page 41 DBTEL Incorporated 3. Power Supply 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 41 of 66...
  • Page 42 DBTEL Incorporated 3.2 RF Power Supply 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 42 of 66...
  • Page 43 DBTEL Incorporated 4. Component 4.1U20 RF Switch Vc1=VC_DCS Vc2=VC_GSM 4.2 U22 GSM RX Filter 4.3 U23 DCS RX Filter 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 43 of 66...
  • Page 44 3. .By U30 output signal(0.2~2.2 V) supply U104 PIN 2 £¬ supply to PIN 4 as GSM coefficient of amplify signal or as PIN 5 DCS coefficient of amplify signal¡£ 4.5 U40 GSM TX COUPLER 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 44 of 66...
  • Page 45 2.7 V ) and U301 RAMP signal£¬ after calculated ,by way of PIN 1 output signal to control U10 amplify coefficients¡£ Ô]£º PIN 1 output signal controls U10 amplify coefficients ( is up to temperature and output 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 45 of 66...
  • Page 46 MHz / -2 ~ 6.5 dBm signal£» When it is in DCS MODE £¬ PIN 8 is supplied 0.8 ~ 3.0 V by U110 £¬ PIN 5 will output 1710 ~ 1785 MHz / -2 ~ 6.5 dBm signal¡£ 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved...
  • Page 47 DBTEL Incorporated 4.9 U110 TRANSCEIVER 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 47 of 66...
  • Page 48 3. The are 3 sets logic input status control signals, RXON¡¢ T XON and SYNON respectively; It is high voltage level state above 0.9 V ,and low voltage level 0.3 V The following signals are directly controlled by U301 ¡£ 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 48 of 66...
  • Page 49 2. The 1.1 ± 0.8 V of PIN 1 is generated by AFC of U301 ;the adjusted range is ± 10 ~ ± 20 PPM¡£ 3. The output of PIN 3 is 13 MHz / 0.8 Vp-p signal. 4.11 U301 MCP 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 49 of 66...
  • Page 50 DBTEL Incorporated 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 50 of 66...
  • Page 51 DBTEL Incorporated 1.Power and Ground 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 51 of 66...
  • Page 52 Band Interface¡¢ Audio Interface¡¢ I2C Bus¡¢ Memory Interface¡¢ Memory Control¡¢ Keyboard Scanner¡¢ Keyboard¡¢ Uart0¡¢ Uart1¡¢ GPIO Port¡¢ Pulse Width Modulator¡¢ JTAG and Test Access Port¡¢ Power-Down Control. 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 52 of 66...
  • Page 53 DBTEL Incorporated 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 53 of 66...
  • Page 54 DBTEL Incorporated 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 54 of 66...
  • Page 55 DBTEL Incorporated 4.13 Supply Controller and SIM interface 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 55 of 66...
  • Page 56 DBTEL Incorporated 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 56 of 66...
  • Page 57 DBTEL Incorporated 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 57 of 66...
  • Page 58 DBTEL Incorporated 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 58 of 66...
  • Page 59 DBTEL Incorporated 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 59 of 66...
  • Page 60 DBTEL Incorporated 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 60 of 66...
  • Page 61 DBTEL Incorporated 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 61 of 66...
  • Page 62 DBTEL Incorporated 4.15 U601 Battery Management I.C. 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 62 of 66...
  • Page 63 SYMPTOM 3£º Ringer malfunction or volume too small Command£º #*80#à select Ringer test item LEVEL PROBABLE CAUSE VERIFICATION AND REMEDY 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 63 of 66...
  • Page 64 Speaker fixed strip of F/H Speaker in right Speaker not in position position. If it is OK, recover it¡£ Speaker malfunction Replace a good Speaker¡£ 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 64 of 66...
  • Page 65 If take actions as above but still cannot improve defect. It may be caused by PCB, this handset should be transfer to higher service level¡£ SYMPTOM 9£º Vibration malfunction when calling or noisy Command£º #*80#àSelect VIBRATOR test item 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 65 of 66...
  • Page 66 If take actions as above but still cannot improve defect. It may be caused by PCB, this handset should be transfer to higher service level¡£ 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 66 of 66...
  • Page 67 If take actions as above but still cannot improve defect. It may be caused by PCB, this handset should be transfer to higher service level¡£ 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 67 of 66...
  • Page 68 Components or parts that involved under Service Level 2 shall implement the functions 5.7.2.1 testing of all of the functions listed below table 2. 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 68 of 66...
  • Page 69 3 : Auxmic - Earpiece 4 : Auxmic - Headset 5: Auxmic - Handfree Change LCD Contrast 5.7.2.2 Handset surface checking for components or parts after repaired 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 69 of 66...
  • Page 70 2.Circuit board replacement: Write the original IMEI code into the new circuit board. The required download cable and software application for IMEI code writing are available at DBTEL Incorporated authorized service center. 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 70 of 66...
  • Page 71 1. Microprocessor: 486 CPU or above ,Operating System: Microsoft Windows 98 or above / 2000, NT ¡£ 2. DBTEL RS-232 Download Cable: Connected to COM1 port of computer. Operation procedures For detail information on operation procedures, refer to DB6568 Service Center Utility Operation Manual.
  • Page 72 Verifying its memory performance by dialing number; ensuring menu options are functioning well by operating it; checking logical part by charging battery and measuring battery capacity. 2003.11.13 DB-6568 Service Manual Level 1 ~ 3 DBTEL Copyright Reserved Page 72 of 66...

  • Page 73: Accessories

    DBTEL Incorporated 6. Accessories The following accessories are designed for working with DBTEL handset. Additional accessories are optional and sold separately. For availability of the accessories, please check with your local authorized vender or retailer. l Desktop Charger The Desktop Charger allows you to charge both the battery fitted in your phone and a spare battery at the same time.

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