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Voxtel BD20, Service Manual

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Voxtel BD20 Service Manual Download Page 26

5-8

 

YES

YES

Replace 7- LED.

7-LED is not working.

Check the voltage level of

Pin 3 in Q703 (Blue), Q702 (Green),

and Q701 (Orange).

The level is higher 

than 0.6V?

Replace the defective part.

END

NO

YES

EN  Blue: R711 is higher than 0.7V?

EN  Green: R712 is higher than 0.7V?

EN  Orange: R713 is higher than 0.7V?

Replace U500 when the solder

state of the following parts are OK:

R709, R711 for Blue,

R708, R712 for Green,

R707, R713 Orange.

NO

5.8  7-LED Trouble

Troubleshooting

Summary of Contents for BD20

Page 1: ...GSM PHONE SERVICE MANUAL MODEL BD20 1st version 2004 01 27 ...

Page 2: ...Rev 1 00 ...

Page 3: ... 4 1 4 1 1 Download Equipment 4 1 4 1 2 Download Procedure 4 1 5 Troubleshooting 5 1 5 1 Power On Trouble 5 1 5 2 MIC Trouble 5 2 5 3 Receiver Trouble 5 3 5 4 Melody Trouble 5 4 5 5 LCD Trouble 5 5 5 6 Charge Trouble 5 6 5 7 Vibrator Trouble 5 7 5 8 7 LED Trouble 5 8 5 9 Key Backlight Trouble 5 9 5 10 TX Power Trouble E GSM 5 10 5 11 TX Power Trouble DCS 5 12 5 12 Rx Sensitivity Trouble E GSM 5 14...

Page 4: ...8 1 8 2 Mechanical Parts List 8 2 9 Block Diagram 9 1 9 1 BB Block Diagram 9 1 9 2 RF Block Diagram 9 2 9 3 Power Supply Block Diagram 9 3 10 Schematic Diagram 10 1 10 1 Key Pad 10 1 10 2 Main Board 10 2 10 2 1 Chipset 10 2 10 2 2 Memory Melody 10 3 10 2 3 Audio SIM 10 4 10 2 4 Connector 10 5 10 3 RF Top Schematic 10 6 10 3 1 RF Pam 10 6 10 3 2 RF Main IC 10 7 ...

Page 5: ...d BD20 has the operation band of GSM 900 and DCS 1800 GSM Phase II features are fully supported and parts of the GSM Phase II features are also supported About the SIM Toolkit BD20 supports up to Class 3 including Class 1 2 For speech communication BD20 supports Full Rate FR Enhanced Full Rate EFR and Half Rate HR For easy text eZi Text is implemented 1 1 ...

Page 6: ...800 TX 1710 1785 MHz DCS 1800 RX 1805 1880 MHz Battery Capacity Standard Li ion 720 mAh Display Full graphic type Dual LCD Main LCD 65 000 color UFB STN Pixels 128x160 Ext LCD 256 color 96x64 7 LED Indicator Antenna Fixed type PC synchronization Applied Speech coding FR EFR HR Data Fax Built in Vibrator Built in Speaker Receiver dual mode Built in Portable Handsfree Ear Phone Built in Travel charg...

Page 7: ...hone Languages Same as number of language Voice memo Voice recording 30 sec 15 sec x 2 entry Play Delete All Supplementary services Call barring All outgoing calls All outgoing international calls All outgoing int calls except to home country All incoming calls when roaming Short Message Write message Send Store Output message Send Save Extract Number Delete Delete All Input message Reply Forward ...

Page 8: ...ility Field test facility Display software version Text input Language English Simplified chinese eZi text Predictive word input Scheduler View day Make Schedule Call Memo Anniversary Delete View all World time Setting local time Number of selectable cities 24 Cities Calculator Operator Addition Subtraction Multiplication Division Unit converter Length conversion Weight conversion Volumes conversi...

Page 9: ...2 4 Specification Function Detail Item Comments Bio Rhythm View Special day Input My Birthday Game 2EA Monkey Magic Hunter ...

Page 10: ...emove the SIM card as shown 3 1 2 Remove the SIM card To do so Slide the metal lock in the direction of arrow 1 Remove the battery To do so Pull the battery lock above the battery toward the top of the phone and hold down Lift the battery away as shown ...

Page 11: ...in Frame 1 Remove four screws on the back of the phone 2 Insert a small type driver between the front case and the Rear case and lift up the front case Front case Rear case Main PCB 3 Now you can remove the PCBs and the other components ...

Page 12: ...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 3 3 Folder 4 Remove two screws from the folder Connector Main PCB ...

Page 13: ...ly Instruction 6 Now you can remove the LCD ass y and the other components LCD ass y 5 Insert a small type driver between the folder upper and the folder lower and lift up the folder lower Folder lower Folder upper ...

Page 14: ...20 the following working environments should be prepared BD20 data link kit LC 100 is connected to COM1 or COM2 serial port of the desktop or notebook PC BD20 data kit download monitor program is copied to the desktop PC or notebook PC Target software is downloaded to the BD20 mobile phone Warning You MUST use the data link kit LC 100 and UART download monitor program Otherwise downloading process...

Page 15: ...p in the PC 2 Execute monitor670 exe And then select Target menu Then choose Connect from the Target menu 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 Data Kit Download Procedure Figure 1 Figure 2 ...

Page 16: ... As the following window shown in Figure 3 is displayed connect BD20 phone to the data link kit LC 100 and power on BD20 If the connection is succeeded the following screen will show the contents as shown in Figure 4 Figure 3 Figure 4 ...

Page 17: ...cedure 5 Click on Flash on the top menu and select Erase and Program Appli only item as shown in Figure 5 6 Choose the target SW that you want to download And then you can see the following window in Fingure 6 Figure 5 Figure 6 ...

Page 18: ...7 If the downloading procedure is succeeded then the following window is shown 4 5 Data Kit Download Procedure Figure 7 ...

Page 19: ...e is powered on properly Check the LCD module The level is higher than 3 5V Charge the battery END NO NO The level is higher than 2 85V Check the level of R500 ON OFF Power on sequence is not executed properly Try again If the result is same change Board 5 Troubleshooting 5 1 Power On Trouble ...

Page 20: ...ds mV of signal levels are measured END NO NO Check the signal level at the point U500 C607 2 2uF Check the signal level at the U604 Pin 5 6 Check R611 and R612 Check F602 and R719 YES Both PINs of signal level are 2 0V NO Replace U604 Case 1 Both is not OK Case 2 PIN5 is only OK Check R613 5 2 MIC Trouble ...

Page 21: ...onnectivity of Receiver component Receiver is not working Connect the Phone to Wireless Communication Test Set Check the signal level at the F501 F502 while putting audio signal in MIC A few hundreds mV of signal levels are measured Check the receiver END NO ...

Page 22: ...he connection is OK Melody is not heard END Check the connectivity of Speaker Connect the Speaker to the phone properly Check the level of C405 PIN 15 level is VBAT NO NO Check whether or not the melody signal is out from Pin 17 18 of U400 Replace U400 5 4 Melody Trouble ...

Page 23: ...or on the PCB LCD connector is well soldered to the PCB The LCD driver source voltage is 3 0V U700 pin 5 YES LCD display is not working Replace LCD module Reassemble LCD module with LCD connector NO Re solder the LCD connector NO YES END YES NO Replace U700 5 5 LCD Trouble ...

Page 24: ...ges are equal to 5 2V 600mA CON301 is well connected to the PCB Reassemble bettery pack Re download S W Re mount CON301 Case 1 Case 2 NO NO NO Replace the bettery pack Replace the defective TA or DTC START END YES Q600 Pin 1 2 voltage is between 0 65 0 9V Replace Q600 D601 voltage is lower than 0 3V Replace D601 R609 voltage is lower than 0 12V Replace R609 5 6 Charge Trouble ...

Page 25: ...ignal is rectangle signal from 0V to 2 85V U701 Pin 3 voltage level is higher than approx 2 5V START In the Test mode select Function Test then select Vibrator Mode Check for the Vibrator Replace if defective NO NO YES YES Check R533 Replace if defective Check for R702 Replace if defective 5 7 Vibrator Trouble ...

Page 26: ... level is higher than 0 6V Replace the defective part END NO YES EN Blue R711 is higher than 0 7V EN Green R712 is higher than 0 7V EN Orange R713 is higher than 0 7V Replace U500 when the solder state of the following parts are OK R709 R711 for Blue R708 R712 for Green R707 R713 Orange NO 5 8 7 LED Trouble Troubleshooting ...

Page 27: ...l of LED pin 1 is same as the voltage value of battery Replace battery Replace Key back light LED Defected key backlight END R700 is well connected Re mount R700 Voltage level Pin 5 6 is higher than approx 0 7V 5 9 Key Backlight Trouble Troubleshooting Note To enter the Test mode press 0718 on the phone and then hold down key 5 9 ...

Page 28: ... 3 DC 1 4V 0 1V Replace U204 if defective Check for U202 soldering Ulysse Nausica S W Check for U206 soldering U206 pin 5 25 28 DC 2 85V Replace U206 if defective Check RF Main chip U202 pin 5 6 7 8 I Q signal DC 1 35V 0 5Vp p Check IF VCO U206 pin 26 27 Frequency 798 MHz Power 25 dBm Check RF 2 VCO U206 pin 23 24 Frequency 1301 4 MHz Power 25 dBm Go to A Remarks 1 Spectrum analyzer SPAN 1MHz VBW ...

Page 29: ...ive Check for U101 soldering U101 pin 4 VBAT DC voltage 3 3V U101 pin 3 C121 PA_ON high voltage U101 pin 2 Q100 pin 1 BSW low voltage U101 pin 6 PA_LEVEL C119 signal U101 pin 7 C107 902 4 MHz freq power Replace U101 if defective Check for U100 soldering U100 pin 7 high voltage U100 pin 4 low voltage Replace U100 if defective Check ANT switch U100 pin 10 C112 Frequency 902 4 MHz Power 13 dBm END Ch...

Page 30: ...ve YES NO Check for U206 soldering U206 pin 5 25 28 DC 2 85V Replace U206 if defective Check VC TCXO U204 pin 3 13MHz oscillation Frequency 13 00 MHz Power 15 dBm Check RF Mainchip U202 pin 5 6 7 8 I Q signal DC 1 35V 0 5Vp p Check RF VCO U206 pin 26 27 Freuency 766 MHz Power 26 dBm Check RF 2 VCO U206 pin 23 24 Frequency 1364 8 MHz Power 26 dBm START Go to B Remarks 1 Spectrum analyzer SPAN 1MHz ...

Page 31: ...al U101 pin 7 C107 1747 8 MHz freq power Replace U101 if defective Check for U100 soldering U100 pin 7 low voltage U100 pin 4 high voltage Replace U100 if defective Check Power Amp U101 pin 11 C115 Frequency 1747 8 MHz Power 11 dBm Check ANT switch U100 pin 10 C112 Frequency 1747 8 MHz Power 9 dBm YES Check for RF connector ANT101 soldering Matching network L100 C108 soldering Check for U202 solde...

Page 32: ...eplace U100 if defective Check for U201 soldering Replace U201 if defective Check RF 1 st SAW Filter U201 pin 3 4 Frequency 947 4 MHz Power 77 dBm YES NO Check for U206 soldering Replace U206 if defective Check RF RFLO VCO U206 pin 23 24 Freuency 1894 6 MHz Power 40 dBm Check ANT Switch U100 pin 8 Frequency 947 4 MHz Power 72 dBm Go to C Remarks 1 Spectrum analyzer SPAN 1MHz VBW 1MHz RBW 3MHz Pres...

Page 33: ...5 15 Troubleshooting END NO Check for U200 soldering Ulysse Nausica S W VC TCXO U204 pin 3 output patch YES C Check U200 pin 2 3 4 5 I Q signal DC 1 35V 0 5Vp p U200 pin 7 Frequency 13MHz Power 15dBm ...

Page 34: ... Replace U100 if defective Check for U203 soldering Replace U203 if defective Check ANT Switch U100 pin 5 Frequency 1842 8 MHz Power 76 dBm Check RF 1 st SAW Filter U203 pin 4 6 Frequency 1842 8 MHz Power 79 dBm YES NO Check for U206 soldering Replace U206 if defective Check RFLO VCO U206 pin 23 24 Frequency 1842 7 MHz Power 30 dBm Go to D Remarks 1 Spectrum analyzer SPAN 1MHz VBW 1MHz RBW 3MHz Pr...

Page 35: ...5 17 Troubleshooting END NO Check for U200 soldering Ulysse Nausica S W VC TCXO U204 pin 3 output patch D Check U200 pin 2 3 4 5 I Q signal DC 1 35V 0 5Vp p U200 pin 7 Frequency 13 MHz Power 15 dBm YES ...

Page 36: ...6 PCB Diagram 6 1 Main PCB 6 1 Top View ...

Page 37: ...6 2 PCB Diagram Bottom View ...

Page 38: ... 16PN C117 CAP CERAMIC CHIP 47nF GRM36COG 470J 50PN C118 CAP CERAMIC CHIP 22pF GRM36COG 220J 50PN C119 CAP CERAMIC CHIP 47pF GRM36COG 470J 50PN C120 CAP CERAMIC CHIP 10nF GRM36X7R 103K 16PN C121 CAP CERAMIC CHIP 150pF GRM36C0G 151J 50PN C200 C202 CAP CERAMIC CHIP 22nF GRM36X7R 223K 16PN C203 C204 CAP CERAMIC CHIP 1pF GRM36COG 010C 50PN C205 CAP CERAMIC CHIP 100nF GRM36Y5V 104Z 16PN C206 CAP CERAMI...

Page 39: ...10 CAP CERAMIC CHIP 15pF GRM36COG 150J 50PN C511 CAP CERAMIC CHIP 220nF 1608 LMK107BJ224K C512 CAP CERAMIC CHIP 100nF 1608 EMK107BJ104K C513 CAP CERAMIC CHIP 100nF GRM36Y5V 104Z 16PN C514 TAN_CAP 47uF 6 3V 595D476X06R3A2T TAN_CAP 47uF 4 0V F950G476MAAAQ2 C515 C516 CAP CERAMIC CHIP 100nF GRM36Y5V 104Z 16PN C517 CAP CERAMIC CHIP 100nF 1608 EMK107BJ104K C518 C519 CAP CERAMIC CHIP 100nF GRM36Y5V 104Z ...

Page 40: ...18Pin 1010 0018 307 DTC CHARGE no terminal 3key CN301 FPCB CONNECTOR B2B 30Pin Socket 1 5t AXK5F30335P CN600 SIM SOCKET 1318723 6 CN601 BATTERY CONNECTOR 3PIN GDBC 03SMT 2 5N 254 CON300 SYSTEM I O CONNECTOR 18Pin 1005 0018 306 DTC CHARGE no terminal CON600 EAR_JACK 02 909BO 66BKY D301 SCHOTTKEY Barrier DIODE RB520S 30 D601 DIODE CRS08 D621 Silicon Epitaxial Planar Pin Diode HVD142 D700 D709 KEY LE...

Page 41: ...IP 10 ohm 5 J 1 16W 1005 0402 MCR01MZSJ100 R306 RES ARRAY CHIP 10 ohm 5 J 1 16W 1005x4 MNR04 MOAB J100 R307 R316 RES CHIP 82 ohm 5 J 1 16W 1005 0402 MCR01MZSJ820 R400 RES CHIP 10 Kohm 5 J 1 16W 1005 0402 MCR01MZSJ103 R401 R402 RES CHIP NC R403 RES CHIP 30 Kohm 5 J 1 16W 1005 0402 MCR01MZSJ303 R404 RES CHIP NC R405 RES CHIP 51 Kohm 5 J 1 16W 1005 0402 MCR01MZSJ513 R406 RES CHIP 10 Kohm 5 J 1 16W 10...

Page 42: ... J 1 16W 1005 0402 MCR01MZSJ124 R700 RES CHIP 1 Kohm 5 J 1 16W 1005 0402 MCR01MZSJ102 R702 RES CHIP 0 ohm 5 J 1 16W 1005 0402 MCR01MZSJ000 R703 R704 RES CHIP 15 ohm 5 J 1 16W 1005 0402 MCR01MZSJ150 R705 RES CHIP 47 ohm 5 J 1 16W 1005 0402 MCR01MZSJ470 R706 RES CHIP 100 Kohm 5 J 1 16W 1005 0402 MCR01MZSJ104 R707 RES CHIP 22 Kohm 5 J 1 16W 1005 0402 MCR01MZSJ223 R708 RES CHIP 12 Kohm 5 J 1 16W 1005 ...

Page 43: ...Z19 P6X U600 COMPARATOR MAX9075EXK T U601 U604 ANALOG SWITCH DG9411DL T1 U700 LDO 3 0V For Driving VIB MIC5219 3 0BM5 U701 VIBRATOR IC MDC3105LT1 U702 COMPARATOR DUAL TC75W56FK U703 FERRITE BEADS 1608 Z 30Ω 1R 1000mA BLM11P300SPT Rdc 0 06Ω V300 VARISTOR 500pF 1608 AVL8M03300 V303 VARISTOR 500pF 1608 AVL8M03300 V304 V306 VARISTOR ARRAY AVNC18S05Q050 MAIN PCB V600 V607 VARISTOR 50pF 1005 AVLC5S02050...

Page 44: ...8 Exploded View and Parts List 8 1 Exploded View 8 1 1 17 19 21 22 23 24 29 34 25 26 27 18 20 28 32 31 35 33 30 2 11 3 12 13 15 5 14 10 16 6 9 8 7 4 ...

Page 45: ...NNA 1 16 ASS Y STD BATTERY PACK BH85 00061A 1 17 DECO PLATE BH710005806 1 18 GUIDE WINDOW SUB BH72 00121A 1 19 GUIDE INDICATOR BH72 00126A 1 20 WINDOW SUB BH72 00130A 1 21 INDICATOR BH72 00127A 1 22 SUB FOLDER UPPER BH85 00057A 1 23 SHIELD FORM LCD BH74 00082A 4 24 SPONGE FOLDER BH74 00086A 1 25 CONDUCTIVE TAPE LCD BH75 00096A 1 26 SPONGE VIBRATOR BH74 00079A 1 27 SPONGE SPEAKER BH74 00080A 1 28 L...

Page 46: ...9 Block Diagram 9 1 BB Block Diagram 9 1 ...

Page 47: ...9dB max Suppression 22 dB 1805 1880MHz 28 dB 855 995MHz 22 dB 1710 1990MHz J 2 ADC ADC DAC DAC BULIP OMEGA BULIN OMEGA BULQP OMEGA BULQN OMEGA I Q 13 MHz ULYSSE PLL_CLK ULYSSE PLL_DATA ULYSSE PLL_SYN_EN ULYSSE BSW ULYSSE PA_ON ULYSSE PBD ULYSSE PA_LEVEL OMEGA RF_ENA ULYSSE Q BDLIP OMEGA BDLIN OMEGA BDLQP OMEGA BDLQN OMEGA Power Amp Module AFC OMEGA IF PLL RF PLL BASEBAND Low IF Receiver Dual RF Sy...

Page 48: ...Block Diagram 9 3 Power Supply Block Diagram 9 3 ...

Page 49: ...10 Schematic Diagram 10 1 Key Pad 10 1 ...

Page 50: ...10 2 Schematic Diagram 10 2 Main Board 10 2 1 Chipset ...

Page 51: ...10 3 Schematic Diagram 10 2 2 Memory Melody ...

Page 52: ...T_2 C616 2 2u 2012 V607 V606 AVLC5S02050 50pF TC75W56FK TE85L U702 B 5 6 7 OUT BLM11HB102SD F600 1 8K R613 C610 47u 4 0V L601 7 5K R601 3 1 0R2_1 R609 Q602 2SA1576FRT106 2 100K R618 VR3 1608 NC C617 1608 9p C614 100n C615 L600 R616 VR3 100K 1 4 VR3 R615 180K 1 2 3 4 5 6 7 8 GDBC 03SMT 2 5 CN601 1 1 2 2 3 3 4 C607 2 2u 1608 SI6459DQ T1 Q600 NC C604 10n V601 VR3 3 4 5 6 VR3 C605 U604 DG9411DL T1 1 2...

Page 53: ...10 5 Schematic Diagram 10 2 4 Connector ...

Page 54: ...10 6 Schematic Diagram 10 3 RF Top Schematic 10 3 1 RF Pam ...

Page 55: ...10 7 Schematic Diagram 10 3 2 RF Main IC ...

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