LGE LG-KD3000 Service Manual Download Page 38 | Manualshive

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SETTING : After initialize 5515C, Test US Cellular

START

Voltage at R341 = 2.65V

Replace QSC6010

Check the signal level

At each side of MIC. Is

It a few tens mVAC?

Replace the microphone

Check signal from R333

Replace R333, QSC6010, or board

Check the soldering of

R391, C322, L308

Re-solder or place them

MIC will work properly

Checking Flow

Yes

Yes

Yes

Yes

No

No

No

NG

Z3X-BOX.COM

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Summary of Contents for LG-KD3000

Page 1: ...ing the key board channel 5 Voltage and Current Value of Termination Part Amplifier Catalogue included Mode Type Name Voltage Current Power CDMA SKY77162 3 4V 455mA 0 282W 6 Functions of Major Semi Co...

Page 2: ...CDMA MOBILE SUBSCRIBER UNIT LG KD3000 SINGLE BAND CDMA MOBILE PHONE SERVICE MANUAL Z 3 X B O X C O M...

Page 3: ...3 Structure and Functions of CDMA Mobile Phone 8 4 Specification 9 5 Installation 12 CHAPTER 2 NAM Input Method Inputting of telephone numbers included 1 Telephone Number and NAM Programming Method 13...

Page 4: ...es are combined into this phone to reduce the call being interrupted in a middle of talking over phone CDMA digital cellular network consists of MSC Mobile Switching Office BSC Base Station Controller...

Page 5: ...tain distance The analog cellular systems are classified further into an AMPS system E AMPS System NMT system ETACS system and JTACS system depending on technologies used Unlike the Time Division Mult...

Page 6: ...ime area several CDMA signals are overlapped Among these types of signals only desired signal energy is selected and received through the use of pre determined binary sequence desired signals can be s...

Page 7: ...from a base station to mobile stations and backward from the mobile station to the base station power control in order to increase the call processing capacity and obtain high quality calls In case th...

Page 8: ...e is selected for use depending on inputted automatic conditions and message data both of them utilize four stage frames of 9600 4800 2400 and 1200 bits per second In addition this type of variable vo...

Page 9: ...the same cell site about 65 In the case of directional cell site one cell normally uses a 120 sector antenna in order to divide the sector into three In this case each antenna is used only for 1 3 of...

Page 10: ...a symbols During the operation with one cell site the searcher searches out multi paths in accordance with terrain and building reflections On three data receivers the most powerful four paths are all...

Page 11: ...mA 580 mA 25dBm 4 1 5 Operating Temperature 30 60 4 1 6 Frequency Stability 0 5PPM 4 1 7 Antenna Fixed PIFA Type Internal 50 4 1 8 Size and Weight Size 105 7 x 44 x 16 5mm L x W x D Weight 70g TBD 4 1...

Page 12: ...of more than 115 12 6 dB 102 4dB at the 1 23MHz band 4 3 Transmit Specification 4 3 1 Frequency Range 824 820 MHz 848 190 MHz 4 3 2 Intermediate Frequency QSC60X0 seires Zero IF 4 3 3 Output Power 0 2...

Page 13: ...MHz 839 580 MHz 840 810 MHz 842 04 MHz 843 270 MHz 844 500 MHz 845 910 MHz 847 140 MHz 848 370 MHz 4 5 MS Mobile Station Receiver Frequency FA NO CH NO CENTER FREQUENCY FA NO CH NO CENTER FREQUENCY 1...

Page 14: ...tes battery is being charged Green light indicates battry is fully charged 5 3 For Mobile Mount 5 3 1 Installation Position In order to reduce echo sound when using the Hands Free Kit make sure that t...

Page 15: ...after input press OK to save To reset the handset press END CHAPTER 2 NAM Input Method Inputting of MIN included 2 NAM Input Method Inputting of telephone numbers included 1 ESN 2 MIN 3 NAM Name 4 Se...

Page 16: ...nal directly Baseband signals created are changed into digital signals by the analog digital converter ADC A D Converter and then auto gain controlled and are demodulated by the modulator demodulator...

Page 17: ...t signals in order to prevent the drop in receive sensitivity characteristics The receive part BPF blocks the signals sent out from entering the receive end in order to improve sensitivity characteris...

Page 18: ...1 For the transmit data path Tx the QSC6010 modulates interpolates and converts the digital signal into an analog baseband and upconverts the Tx analog baseband into RF The QSC6010 communicates with t...

Page 19: ...input terminal and internal interface circuit are integrated onto one IC after going through the GaAs HBT heterojunction bipolar transistor process The module of power amplifier is made up of an outpu...

Page 20: ...e operation status on to the screen and a receptacle that receives and sends out voice and data with external sources 2 2 2 Voice Processing Part The voice processing part is made up of an audio codec...

Page 21: ...nly and MIDI and MP3 functions are supported by the various QSC tiers as indicated in Table 1 2 The baseband function reduces part costs by using two external bus interfaces to support next generation...

Page 22: ...MP and external MIDI Synthesizer transferred to the ear piece 2 3 3 Memory Part The memory part consists of a 64Mbits Flash Memory and a 32Mbits SRAM On the Flash Memory there are programs used for th...

Page 23: ...bus and a 32 bit internal data bus It has a high performance and low power consumption FLASH ROM and SRAM Flash Memory is used to store the program of the mobile station Using the down loading program...

Page 24: ...When Rx Sensitivity isn t good enough Test Point 4 1 Rx Part Trouble CHAPTER 4 Trouble Shooting CHAPTER 4 Trouble Shooting QSC6010 QSC6010 Duplexer Z 3 X B O X C O M...

Page 25: ...Circuit Diagram Z 3 X B O X C O M...

Page 26: ...CH 610 1 Check RF cable Loss 2 Check RF path Circuit connection 3 Check U101 DP101 F101 Checking Flow NG Change RF cable or re set loss NG Re work or replace them NG Replace them Download S W Calibra...

Page 27: ...then click offline d Click Band select to cdma Tx on Power Amp On Set channel to 610 AGC 400 Spectrum analyzer setting Oscilloscope setting 1 Check PAM Circuit 2 Check Duplexer Mobile SW Circuit 3 Ch...

Page 28: ...4 2 1 Check PAM Circuit Test Point Circuit Diagram U102 Pin4 Vref 2 85V U102 Pin7 RF_OUT U102 Pin 1 8 Vcc1 2 U102 Pin2 RF_IN Z 3 X B O X C O M...

Page 29: ...F_IN YES Check U102 Pin4 V_ref Check F110 circuit Check Q101 circuit NO Level is 3 2V 4 2V OK YES Check U102 Pin1 8 VCC1 2 Check C203 U201 NO Output Level is Appear YES Check U102 Pin7 RF_OUT Replace...

Page 30: ...ircuit Flow Level is Appear YES NO Level is Appear NO Replace QSC6010 Check DP101 Pin6 DUP_OUT YES Replace DP101 Replace U101 Check U101 Pin1 Duplexer DP101 Mobile S W DP101 PIN6 DP_out U101 PIN1 Mobi...

Page 31: ...Points Figure 4 3 1 QSC6010 circuit diagram 4 3 1 Power On Trouble R217 2 6V_MSMP C244 2 65V_MSMA R244 1 2V_MSMC R404 PWR_ON_SW Circuit Diagram QSC6010 R406 2 6V_TX 4 3 Logic Part Trouble Z 3 X B O X...

Page 32: ...ry again Replace U201 Re download Software Check the contact of power key or dome switch Push power on key and check the level change of R404 Check the voltage of the following port at U201 1 2V_MSMC...

Page 33: ...4 3 2 Charging Trouble Test Points Circuit Diagram C O N 4 0 4 QSC6010 Z 3 X B O X C O M...

Page 34: ...lder or replace CON404 The charging adaptor TA is out of order Change the charging adaptor Voltage at Pin25 V_CHAR of CON301 5V YES NO YES Is the battery charged NO The battery may have the problem Ch...

Page 35: ...4 3 3 Audio AMP Trouble Test Points Figure 4 3 3 RECEIVER PART Circuit Diagram R462 U309 Pin1 QSC_AMP_OUT Pin4 COM_SPK U308 Pin1 QSC_AMP_OUT Pin4 COM_SPK Z 3 X B O X C O M...

Page 36: ...8 U309 pin1 SETTING Ringers at Sounds menu Check the contact of speaker or Replace the speaker Replace QSC6010 or board NO Yes Yes Check the signal level at pin4 of U308 U309 Re soldering or Replace t...

Page 37: ...Test points Circuit Diagram 4 3 6 MIC Trouble R392 C322 L308 Z 3 X B O X C O M...

Page 38: ...10 Check the signal level At each side of MIC Is It a few tens mVAC Replace the microphone Check signal from R333 Replace R333 QSC6010 or board Check the soldering of R391 C322 L308 Re solder or place...

Page 39: ...01 C324 Test points SETTING Vibrator on at Sounds of test menu Checking Flow START Replace QSC6010 or board No NG Yes OK Check the state of Contact of Vibrator Re contact vibrator Check the solder of...

Page 40: ...8 Key Backlight LED Trouble Test Points Figure 4 3 8 KEYPAD BACK LIGHT PART Figure 4 3 8 KEYPAD Back Light Circuit LED309 LED308 LED306 LED305 LED311 LED314 LED313 LED312 Circuit Diagram Z 3 X B O X C...

Page 41: ...331 R305 R337 R319 3 2 4 2V Check LEDs directions Charge or Change Battery and try again Check the soldering of each R or Replace them Re solder or replace LEDs NG No NG OK Yes OK BACKLIGHT WILL WORK...

Page 42: ...4 3 9 Earphone Trouble Test Points Circuit Diagram Figure 4 3 9 EAR MIC JACK PART Circuit 4 3 9 EAR MIC JACK PART CON301 R392 C322 L308 Z 3 X B O X C O M...

Page 43: ...e audio part of the test equipment to echo mode Earphone detect problem Audio path problem Can you hear your voice from the earphone Change Earphone Set the audio part of the test equipment to continu...

Page 44: ...r replace them Does it work well Re download software Does it work well 4 Change main board NG OK Yes Yes No No Earphone receiving path problem 2 Is level detected form C322 Check soldering of Pin 2 o...

Page 45: ...4 3 10 LCD Trouble Test Points Circuit Diagram CON304 U303 Z 3 X B O X C O M...

Page 46: ...g or Replace R405 R476 No Does R405 R476 LCD connection Work Properly Change the Main Board Yes Check the Control signal D 0 15 LCD_RESET LCD_ID LCD_CS LCD_LIGHT Check the CON406 Soldering No Re Solde...

Page 47: ...ART Check the U303 pin 5 VPWR Does U303 work Properly No Yes Check replace QSC Yes No Re Soldering or Replace U303 Check the signal level at LCD_BACK_EN high Replace QSC No Yes LCD backlight will work...

Page 48: ...CON302 Test Points Circuit Diagram 4 3 11 UIM Trouble Z 3 X B O X C O M...

Page 49: ...Checking Flow Z 3 X B O X C O M...

Page 50: ...ower Management General Housekeeping BB PM Block I F MIC EAR Output Voltage Reguration Connectivity UIM UART Quadrature Upconverter Quadrature Downconverter LNA RF Block BPF KD3000 Block Diagram QSC60...

Page 51: ...Z 3 X B O X C O M...

Page 52: ...Z 3 X B O X C O M...

Page 53: ...Z 3 X B O X C O M RX 824Mhz 849Mhz TX 869Mhz 894Mhz...

Page 54: ...Z 3 X B O X C O MRX 824Mhz 849Mhz TX 869Mhz 894Mhz Audio MIC...

Page 55: ...Z 3 X B O X C O M Audio MIC...

Page 56: ...Z 3 X B O X C O M...

Page 57: ...Z 3 X B O X C O M...

Page 58: ...Z 3 X B O X C O M...

Page 59: ...Z 3 X B O X C O M...

Page 60: ...Part No QTY 1 COVER FRONT MCJK0069901 1 2 FILTER SPEAKER MFBC0030001 1 3 PAD LCD MPBG0059101 1 4 TAPE PROTECTION FRONT MTAB0162801 1 5 TAPE PROTECTION BACK MTAB0162901 1 6 TAPE WINDOW MTAD0066701 1 7...

Page 61: ...ECZH0000830 3 L304 RESISTOR ERHZ0000701 4 LED302 LED303 LED308 LE D309 LED311 LED312 LED3 13 LED314 BLUE LED EDLH0006001 5 R305 R313 R316 R317 R319 R328 R331 R337 RESISTOR ERHZ0000402 6 R326 RESISTOR...

Page 62: ...44 C245 C251 C252 C253 C256 C261 C265 C267 C272 C275 C276 C277 C278 C301 R419 R432 R434 CHIP CAPACITOR ECCH0000182 35 5 C108 C110 C116 C117 C126 C223 C237 C249 C263 C264 C268 C271 C337 C342 C402 C403...

Page 63: ...HIP CAPACITOR ECZH0001421 11 18 C216 CHIP CAPACITOR ECZH0001501 1 19 C217 CHIP CAPACITOR ECZH0025501 1 20 C226 CHIP CAPACITOR ECZH0003121 1 21 C236 CHIP CAPACITOR ECCH0006201 1 22 C239 CHIP CAPACITOR...

Page 64: ...428 RESISTOR ERHZ0000464 4 47 L102 L116 CHIP INDUCTOR ELCH0001427 2 48 L103 CERAMIC INDUCTOR ELCH0001405 1 49 L104 CHIP INDUCTOR ELCH0001408 1 50 L106 CHIP INDUCTOR ELCH0001409 1 51 L109 L110 CHIP IND...

Page 65: ...233 RESISTOR ERHZ0000441 1 74 R234 RESISTOR ERHZ0000212 1 75 R240 RESISTOR ERHZ0003202 1 76 R243 RESISTOR ERHZ0000488 1 77 R255 RESISTOR ERHZ0000402 1 78 R265 R396 RESISTOR ERHZ0000406 2 79 R266 RESIS...

Page 66: ...26 RESISTOR ERHZ0000444 1 90 R473 RESISTOR ERHZ0000445 1 91 U101 MOBILE S W ENWY0004501 1 92 U102 PAM SMPY0009101 1 93 U201 MODEM EUSY0298001 1 94 U301 MEMORY EUSY0180602 1 95 U303 LED CHARGE PUMP EUS...

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