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Motorola V820, Service Manual

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Motorola V820 Service Manual Download Page 6

Product Description 

6  

Motorola Confidential Proprietary 

 

The main housing assembly includes a battery cover, chassis, 
main circuit board, keypad and plastic front housing. 

 
 

The main circuit board is comprised of the Receiver, 
Transmitter, Synthesizer and Control Logic Circuitry which 
together form the dual band tri-mode phone electronics. 
 
 

Summary of Contents for V820

Page 1: ...Service Manual Level 2 Preliminary Model V810 CDMA800 1900MHz Analog800MHz ...

Page 2: ...oppel or otherwise any li cense under the copyrights patents or patent applica tions of Motorola except for the normal non exclusive royalty free license to use that arises by operation of law in the sale of a product This manual is the property of Motorola No part of this manual may be duplicated in any form without the ex press written permission of Motorola This manual must be returned upon Mot...

Page 3: ...ert Interface 25 Portable Operation 13 Keypad Interface 25 Mobile Operation 13 Flip Open Close Detection 26 Display Module Interface 26 Camera 26 Cellular Overview 14 LED s 26 Overall Concept 14 Hypothetical Cell System 15 Disassembly Procedure 30 Operation 15 Remove Main Board 30 Service Area 15 Remove Keypad 30 PCS System 15 Remove Flip Assembly 31 Remove Flip Hinge 31 Remove Flip Assembly 32 Ci...

Page 4: ...4 2003 Motorola Inc Contents V810 This page is intentionally left blank ...

Page 5: ...ctor in the main housing assembly The display and Camera are located in the hinged flip assembly The flip assembly includes the entire hinge mechanism and is attached to the main housing by four screws There is a full display on the inside of the flip assembly and a OLED on the outside of the flip assembly Headset Volume Earpie Anten Displa Voice Left Soft Manu Key Right Soft TALK Micropho Accesso...

Page 6: ...housing assembly includes a battery cover chassis main circuit board keypad and plastic front housing The main circuit board is comprised of the Receiver Transmitter Synthesizer and Control Logic Circuitry which together form the dual band tri mode phone electronics ...

Page 7: ...graphic area There are no standard primary and second ary channels The actual primary and secondary channel depends on which block is used The lowest valid channel number is 25 The highest valid number is 1175 Total Number of valid channel numbers is 46 CDMA 1900MHz Performance Specifications General Channel No Tx Frequency Mhz Rx Frequency Mhz 25 1851 25 1931 25 200 1860 00 1940 00 400 1870 00 19...

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Page 9: ...he Amps channel spacing is 30 KHz because the CDMA signal BW 1 25 MHz the actual CDMA signal must be spaced every 41 channels 41 30 KHZ 1 23MHZ In a dual mode system CDMA signals would never occupy analog control channels 313 to 354 A System preferred channels primary 283 Secondary 691 B System preferred channels Primary 384 Secondary 777 The lowest valid CDMA channel is 1013 The highest valid CDM...

Page 10: ...RF Power Output max power 25dBm for CDMA 800 1900 and 26 1 dBm for Analog Input Output Imped ance 50 ohms nominal Spurious Harmonic Emissions Complies with Title 47 Part 22 of the code of Federal Regulations Audio Distortion Less than 5 at 26dB Hum and Noise C MSG 32 dBm below 8kHz deviation transmit and receive Modulation F3 12 kHz for 100 at 1 kHz AMPS wide 1M25D1W 1 25 MHz bandwidth CDMA Transm...

Page 11: ...95 o F tested for 48 hours Dust 140 mesh blown silica flour test tested for 5 hours Notes EIA Electronic Industries Association Standard RS152B states the minimum stan dards for Land Mobile Communications FM or PM transmitters 25 470 MHz EIA IS 19 states the recommended standards for 800 MHz cellular subscriber units EIA Standard RS316B states the standards for portable land mobile communications ...

Page 12: ...c Motorolans should contact AAD via one of the following numbers Phone 1 800 422 4210 Fax 1 800 622 6210 http accesssecure mot com Accesspoint cgi bin2 SoftCart exe Accesspoint quick html L test rkod3498 930004870 When ordering replacement parts or equipment information the complete identification number should be included This applies to all components kits and chassis If the component part numbe...

Page 13: ... be allowed to come within 20 centimeters of the antenna during operation of the equipment DO NOT operate this equipment near electrical blasting caps or in an explosive atmosphere Mobile telephones are under certain conditions capable of interfering with blasting operations When in the vicinity of construction work look for and observe signs cautioning against mobile radio transmission If transmi...

Page 14: ...iginal signal With CDMA unique digital codes rather than sepa rate RF frequencies or channels are used to differentiate subscribers Table 4 Note The following description is intended only as a preliminary general introduction to cellular systems This description is greatly simplified and does not illustrate the full operating capabilities techniques or technology involved in cellular systems The c...

Page 15: ...through the B cell on that frequency A similar change is performed when the phone moves from cell B to cell C and again when the phone moves from cell C to cell D In this example the radiotelephone has operated in four cell sites through four cell sites and on the same spread spectrum without interruptions in voice communications As the radiotelephone leaves a cell the frequency on which the phone...

Page 16: ...For GPS the GPS band pass filter F103 is fed to the GPS LNA that is comprised in RFR6000 IC100 F101 is band pass filter for 800MHz and F102 for 1900MHz The IC101 is a front end IC that contains two sets of LNA The 800MHz and 1900Mhz receive signal is further filtered through the SAW band pass filters F101 F102 for image rejection LO leakage attenuation and Tx signal attenuation The GPS receive sig...

Page 17: ...trol Circuit Loop filter VCO Switch network RFT 6100 RFT 6100 S B I RX PLL TX PLL L O G I C Loop filter 19 2MHz VCTCXO Reference REF Control Circuit MODE LOCK Fref Enable VDDM Ref from PM6000 M M S S M M 6 6 0 0 5 5 0 0 VDDM I_SET DAC_REF Bias Control Circuit S B I VDDM Bias ctls SBI ctls RFL 6000 RFL 6000 PCS CELL Cell BPF GPS BPF Rx Rx Tx Tx Duplexer Duplexer Bias Control Circuit Bias Control Ci...

Page 18: ... the next stage After that signal pass through Split SAW band pass filter F105 whose typical insertion loss is 2 4 dB and 38dB for Rxband rejection SPDT switch control to pass Split band 1850 1880MHz and 1880 1910MHz respectively PA driver IC107 whose gain is approximately 28dB The output of IC107 is fed to PCS FBAR duplexer and then SP3T switch to Ant the power level at the feeding point of the a...

Page 19: ...d in the main board Baseband Processor IC IC201 MSM6050 CDMA 1X baseband Processor integrates functions that support a tri mode CDMA FM subscriber unit Subsystems within the MSM6050 device include a CDMA processor a Digital FM DFM processor QUALCOMM designed DSP for voice compression an ARM ARM7TDMI microprocessor To provide an optimized system solution for IS2000 1X services the MSM6050 device su...

Page 20: ...Pseudo SRAM Memory is mixed multi chip package containing two 64Mbit Flash memories and one 64Mbit pseudo SRAM The Flash PSRAM Memory supports page mode for fast access time Flash is for boot code program code storage and NVM data storage FLASH memory contains executable code that is executed directly from FLASH Flash memory also contains configuration parameters look up tables calibration constan...

Page 21: ...D 2 BATTFDBK_RTS and 3 EXT_B Pin 3 is EXT_B main charging current path and pin 2 is battery feedback and manual test multiplexed signal PM6000 will monitor battery voltage and charging current for battery icon displaying normal phone operation without a charger attached Power Distribution Voltage regulation is provided by the PM6000 IC The Low Dropout Regulators output voltages can be controlled b...

Page 22: ...FM DTMF generation and detection Noise Suppression audio AGC control and automatic volume control AVC The MSM6050 has an auxiliary Pulse Code Modulation PCM interface and programmable Tx and Rx 13 Tap compensation filters to support an auxiliary linear mu Law or A law Codec that is typically found in carkit applications Sidetone DSP Sidetone is audio signal from the microphone summed into speaker ...

Page 23: ...ptional digital filters on the Tx path prior to the Vocoder a slope filter and a high pass filter The slope filter is designed to provide pre emphasis for the high frequency audio prior to the Vocoder Tx Volume Control The Tx and Rx audio path have separate volume controls to adjust the loudness levels on the Tx and Rx audio paths The Rx and Tx volume controls are programmable multipliers Headset ...

Page 24: ...rs are software programmable and can be reconfigured during Vocoder or DFM operation Tx FIR is programmable 13 tap FIR filter whose coefficients can be programmed through the QDSP4000 parameters txPcmFiltLoad and Tx PcmFiltCoeff Each filter consists of 7 coefficients with the outside taps h 0 and h 12 h 1 and h 11 h 2 and h 10 h 3 and h 9 h 4 and h 8 and h 5 and h 7 using the same coefficient valu...

Page 25: ...ath is routed through IC302 to protect ESD and connected to MSM AUXOP The DC level of this AUDIO_OUT signal is also used to externally command the phone to toggle it s ON OFF state The AUDIO_OUT signal connects to PM6000 KBDPWR_ON pin via D301 to provide this capability AUDIO_OUT will be routed to MSM GPIO to detect POWER END key MIDI Alert Interface The YMU762 IC200 is an MIDI sound generator IC ...

Page 26: ...he display module includes window LCD panel back light circuitry and display driver circuitry The Display Module interfaces to the main board via CN200 16 bit parallel interface is used for LCD CAMERA OMNIVISION CAMERA is located on the LCD board This camera is 300K Pixel COMS VGA type Operating voltage is 2 5V and 3 0V LEDs The Keypad Backlight LED is realized by ten blue color LEDs which part nu...

Page 27: ...y Cover Ensure the phone is turned off Grab the bottom of the antenna Assembly unscrew the antenna from the housing lift the antenna away from the housing Pull the battery door latch gently lift the battery door away from the rear housing 27 ...

Page 28: ...y Back Screws Slide the battery in the direction of the arrow lift the top end of the battery near the antenna up and out of the battery compartment as shown Using a T drive with a T 6 bit remove the 4 screws from the rear housing 28 ...

Page 29: ...side of the rear housing Pry them with the bezel stick and release both Snap fits as shown in the picture below After releasing the Snaps fits gently lift the back housing and push to the front Using the bezel stick tool pull up the flip Flex cable connector 29 ...

Page 30: ...V810 Disassembly Motorola Main Board Keypad Pull up the bottom side of the PCB board Assembly Pull up the Keypad Assembly 30 ...

Page 31: ...Hinge Use twister to remove the flip ground Assembly Please make sure to re install the flip ground assembly back in to place Use a small flat head screw driver Push down the Hinge Assembly pull off the flip Assembly 31 ...

Page 32: ...V810 Disassembly Motorola Flip Remove Rubber Bumper Push down Twist the Grip pull up the flip Assembly Using a twister tool remove the ribber Bumpers from the flip Assembly 32 ...

Page 33: ...Flip Screws Flip Cover Using a small head Phillips screw driver remove the 4 screws from the flip Assembly Using the bezel stick pull up the flip Assembly 33 ...

Page 34: ...0 Disassembly Motorola Bracket Sub LCD Camera Connector Using the bezel stick remove the bracket sub LCD Assembly from the CLI Display Using the bezel stick tool pull up the camera Flex cable connector 34 ...

Page 35: ...Camera Remove Vibrator Pull off the camera Assembly from the connector Using a flat screw driver pull off the vibrator motor from the flip housing 35 ...

Page 36: ...mbly Motorola Display s Disassembly Main Display Connector Using the bezel stick tool pull up the Display Assembly from the flip Assembly Using the bezel stick tool pull off the Main Display Flex cable connector 36 ...

Page 37: ...Main Display CLI display Flash vibrator Speaker and camera circuit Module 37 ...

Page 38: ...38 2003 Motorola Inc V810 Circuit Description Theory of Operation This Page is intentionally left blank ...

Page 39: ...and software require ments 1 Personal computer with 2 PST 6 6 or latest software Motorola test interface adapter box junior board 3 SYN8400A Interface adapter power supply 4 SPN4029A or Wall charger 5 SPN4278D CE Bus cable 6 SKN6304B Serial USB cable same as used for tarpon P2K About Junior board operation V810 will support both USB Serial communication V810 uses the T720 Rf Cable adaptor part 288...

Page 40: ...EWLETT FRONT VIEW PRINT ER CRIB 20 POWER POWER STRIP RS23 2 MONI TOR TO CRIB 20 Printer Security Key LAN CONNEC TION REF OUTPUT COMPUT ER HP IB Seri al m 40 TEST AND PHASING Gate 24 supports the testing and phasing of V810 product For more details on Test and Phasing contact Service Test Engineering Group ...

Page 41: ...unit should be thoroughly tested to ensure that it operates correctly This is especially important if the Logic RF assembly is replaced For general repairs which do not include replacing the Logic RF assembly simply placing a call and checking signal strength and transmit and receive audio quality is normally sufficient When the Logic RF assembly is replaced the unit must have a comprehensive test...

Page 42: ...ocess Internal Charger Test Debugging Phone must be in Phone T mode to analyze charger In DMSS mode the default state of the charger is off unless a valid charger fast or mid rate and battery EPROM and Ther mistor present are detected by software Charging circuitry except for PM6000 is next to battery contact block and not under any shields When charger is disabled the EXT_B current should be 150m...

Page 43: ...d defective 1 Replace the keypad membrane with a known good part 2 Temporarily connect 4 5 V DC to the battery contacts 3 Depress the PWR button if unit turns on and stays on disconnect the power source and reas semble the phone with the new keypad membrane d Transceiver Board Debugging Follow the no turn on Debug proce dure 1 Remove the Transceiver Board Substitute a known good board 2 Temporaril...

Page 44: ...c Board 4 Alert ringer volume is distorted or too low a Alert defective b RF Audio Logic board defective 1 Replace the defective alert with a known good alert 2 Replace the RF Audio Logic Board 5 Transmit audio is weak distorted or dead a Microphone defec tive b RF Audio Logic board defective 1 Replace defective microphone 2 Replace the RF Audio Logic Board 6 Receive audio is weak and or distorted...

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Page 46: ...2003 Motorola Explored View Diagram V810 46 ...

Page 47: ...A Battery Pack 9 01 36012 01 Housing rear 7 01 36000 01 Antenna 8 Cover Battery 10 Frame front 2 01 36011 01 Housing front 1 10 36000 03 Navigation key 6 37 36000 01 Tel key 5 Plate deco front 4 40 00010 01 Side Key 3 Part Number Description NO Parts Numbers 47 ...

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