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Motorola A840 - Cell Phone - CDMA2000 1X Service Manual Download Page 42

44

   June 07, 2004   

6809485A78-O

Disassembly

 A840

Removing and Replacing the Keypad 

1.

Remove the antenna, battery cover, battery, rear housing assembly, flex 
connector, and transceiver board assembly as described in the procedures.

2.

Use the plastic tweezers to lift the keypad from the front housing as shown in 
Figure 25.

3.

To replace, insert the keypad into the front housing, ensuring the keys align 
properly with the openings in the front housing.

4.

Replace the transceiver board, rear housing assembly, antenna, battery, and 
battery housing as described in the procedures.

032220o

Figure 25. Removing the Keypad

Summary of Contents for A840 - Cell Phone - CDMA2000 1X

Page 1: ...Level 2 Service Manual A840 A860 Digital Wireless Telephone CDMA 800 1900 MHz GSM 900 1800 MHz ...

Page 2: ......

Page 3: ...able User Information Memory 30 Removing and Replacing the Battery 31 Removing and Replacing the Antenna 32 Removing and Replacing the Keypad Bezel 33 Removing and Replacing the Speaker Cover 34 Removing and Replacing the Keyboard Stiffener 35 Removing and Replacing the Flip Assembly and Transceiver Board 36 Removing and Replacing the Flip Display Lens 39 Removing and Replacing the Flip Assembly S...

Page 4: ...4 June 07 2004 6809485A78 O Contents A840 ...

Page 5: ...el number on the housing Use the entire model number when inquiring about the product Numbers are also assigned to chassis and kits Use these numbers when requesting information or ordering replacement parts Product Names Product names are listed on the front cover Product names are subject to change without notice Some product names as well as some frequency bands are available only in certain ma...

Page 6: ...programs with the Motorola product About this Service Manual Using this service manual and the suggestions contained in it assures proper installation operation and maintenance Refer questions about this manual to the nearest Customer Service Manager Audience This service manual aids service personnel in testing and repairing A840 telephones Service personnel should be familiar with electronic ass...

Page 7: ...e repaired but not refurbished as standard Appointed Motorola Service Hubs will perform warranty and non warranty field service for level 2 assemblies and level 3 limited PCB component The Motorola High Technology Centers will perform level 4 full component repairs Customer Support Customer support is available through dedicated Call Centers and in country help desks Product Service training is av...

Page 8: ...e the product model number or other related major assembly along with a description of the related major assembly and of the component in question In the U S A to contact Motorola Inc on your TTY call 800 793 7834 Accessories and Aftermarket Division AAD Order replacement parts test equipment and manuals from AAD In EMEA call 49 461 803 1638 In Asia call 65 648 62995 U S A Outside U S A Phone 800 ...

Page 9: ...i Ion 750 mAh battery Average Transmit Current 310 mA at 13 dBm Average Stand by Current 3 40 mA Dimensions with 750 mAh Li ion battery 94mmX49mmX23mm 3 7 in x 1 9 in x 0 9 in Size Volume 88 cc 5 37 in 3 without antenna Weight 100g 3 84 oz with battery Temperature Range 30 C to 60 C 22 F to 140 F Humidity 80 Relative Humidity at 50 C 122 F Battery Life 750 mAh Li Ion Battery Up to 180 minutes digi...

Page 10: ... AMPS SINAD C MSG weighted Sinad 12dB or greater 104 dBm CDMA 0 5 Static FER 0 5 or less Audio Distortion Less than 5 at 1004 Hz 8 kHz peak frequency deviation transmit and receive Adjacent and Alternate Channel Desensitization 3 BER max at 107 dBm signal 94 dBm 30 kHz 65 dBm 60 kHz IM AMPS Greater than 65 dB ...

Page 11: ... 96x64 pixel 4K color CSTN The camera is a 350K pixel VGA CMOS Sensor Camera The main housing assembly includes a battery cover chassis main circuit board keypad and plastic front housing The main circuit board contains the Receiver Transmitter Synthesizer and Control Logic Circuitry which together comprise the dual band tri mode phone electronics The telephones are made of polycarbonate plastic w...

Page 12: ...nnectivity via Bluetooth and CE bus Speaker Independent Digit and Name Dialing 5 way Navigation Simultaneous button press for BREW Gaming PIM functionality PC Sync with optional Mobile Phone Tools Software Predic tive Text iTAP 500 Multi fielded Phonebook Entries High speed data support CDMA1X and GPRS TTY compliant Hearing Aid Telephone Interconnection System HATIS support AFLT aGPS location serv...

Page 13: ...tems make end calls set ring styles Voice Recognition Key Press once to activate speaker independent voice recognition Press hold to record voice records contacts shortcut names Accessory Port Send Key Make answer calls view recently dialed calls list Left Soft Key Perform functions identified by left display prompt Right Soft Key Perform functions identified by right display prompt 5 Way Navigati...

Page 14: ...splay The display provides constant graphical representations of battery capacity and signal strength as well as the real time clock Display animation makes the phone s icon menu move smoothly as the user scrolls up and down 040183o Figure 2 Hardware Features Locations Whether a phone displays all indicators depends on the programming and services to which the user subscribes Headset Jack Camera L...

Page 15: ...g or no ring or vibrate Additionally the profiling feature allows users to identify incoming calls by a specific ringer tone Battery Function Battery Charge Indicator The telephone displays a battery charge indicator icon in the idle screen to indicate the battery charge level The gauge shows four levels 100 66 33 and Low Battery 032237o Figure 3 A840 Display Icon Indicators 032418o Oà rÑuyÉ Right...

Page 16: ...tteries can cause property damage and or bodily injury such as burns if a conductive materialsuch as jewelry keys orbeaded chains touch exposed terminals The conductive material may complete an electrical circuit short circuit and become quite hot Exercise care in handling any charged battery particularly when placing it inside a pocket purse or other container with metal objects G If the battery ...

Page 17: ...RM926EJ S CPU and QDSP4000 DSP eliminates the need for the multimedia companion processor s normally required for video based applica tions playing MP3 music files and MIDI synthesizer CMX functions The MSM6300 chipset and system software incorporates the advanced feature set of QCT s Wireless Internet Launchpad suite of technologies integrated MPEG 4 video decoding encoding MP3 audio decoding a 2...

Page 18: ...termediate Frequency ZIF or direct conversion architecture for the wireless handset market This direct conversion eliminates the need for large IF Surface Acoustic Wave SAW filters and additional IF circuitry which significantly reduces the handset BOM parts count facilitating multiband and multimode handsets that can be produced in smaller form factors radioOne technology also incorporates the fr...

Page 19: ... key parameters under voltage lockout and crystal oscillator signal presence are mon itored to protect against detrimental conditions Handset level user interfaces are also supported The IC includes four backlight or LED drivers with brightness current control that could be used for the keypad the LCD and two user definable general purpose drivers Independent vibrator and ringer buzzer drivers ale...

Page 20: ...20 June 07 2004 Theory of Operation A840 Figure 5 PM6050 Block Diagram ...

Page 21: ...ementations Overall transceiver performance depends on the combined complementary performance of all the ICs in the chipset The RTR6300 IC supports multi band multi mode phones with two receiver signal paths and four transmitter signal paths Receiver paths EGSM 900 DCS 1800 GSM Transmitter paths EGSM 900 using OPLL techniques DCS 1800 using OPLL techniques CDMA Transmitter paths cdma2000 also know...

Page 22: ...power CMOS functions Designed to operate with 2 7 to 3 0 Volt power supplies it is compatible with single cell Li Ion batteries RTR6300 is available in a small thermally efficient package 48 BCCP RFR6000 Overview The RFR6000 is an RF to Baseband receiver IC an integral component of QUAL COMM s radioOne TM Zero IF chipset All radioOne ICs are highly integrated and fulfill specific functions functio...

Page 23: ...s ideally supplemented by the RFT6100 transmitter IC provide frequency plan flexibility and further reduce PCB parts count The device is fabricated using an advanced SiGe BiCMOS process that accommo dates high frequency high precision analog circuits as well as low power CMOS functions and is designed to operate with 2 7 to 3 0 volt power supplies Although the MSM operates at lower voltages compat...

Page 24: ...ates are available for FM operation Max and Low When operating in the Cellular FM mode the CLNA gain is controlled by a dedicated MSM signal applied to pin 6 FM_STEP rather than the SBI The IC operating mode and LNA bias currents are automatically adjusted via software to minimize DC power consumption The IC is placed in Sleep Rx and Rx Tx modes depending upon the handset s status with LNA bias cu...

Page 25: ...includes 66 80387A95 antistatic mat 66 80334B36 ground cord and 42 80385A59 wrist band Provides protection from damage to device caused by electrostatic discharge ESD 6680388B67 Disassembly tool plastic with flat and pointed ends manual opening tool Used during assembly disassembly of phone 6680388B01 Tweezers plastic Used during assembly disassembly Digital Multimeter HP34401A2 Used to measure ba...

Page 26: ... the phone are listed in Table 1 preceding G Many of the integrated devices used in this phone are vulnerable to damage from electrostatic discharge ESD Ensure adequate static protection is in place when handling shipping and servicing the internal components of this equipment G Avoid stressing the plastic in any way to avoid damage to either the plastic or internal components ...

Page 27: ...tly lift the top end of the battery cover away from the phone 4 Lift the battery cover away from the phone 5 To replace align the battery cover to the phone 6 Slide the bottom end of the battery cover into the phone 7 Lower the top end of the battery cover onto the phone until battery cover latch snaps into place 040546o Figure 9 Removing the Battery Cover Battery Cover Latch 1 2 3 ...

Page 28: ...ery cover over and unlock the RUIM latch as shown in Figure 9 3 Lift the RUIM out of the battery door 4 To replace place the RUIM into position in the batttey door Observe the notched corner when inserting the RUIM 5 Slide the RUM latch over the RUIM to secure it 6 Turn the batter cover over 7 Replace the battery cover as described in the procedures 040548o Figure 10 Removing the RUIM ...

Page 29: ...e phone 6 Insert the battery printed arrow first into the battery compartment and push down 7 Insert the ridge at the bottom of the housing into the base of the phone then push the battery down and snap it into place E All batteries can cause property damage and or bodily injury such as burns if a conductive materialsuch as jewelry keys orbeaded chains touch exposed terminals The conductive materi...

Page 30: ... are completely disengaged slide the antenna out of the housing See Figure 12 4 To replace insert the threaded end of the antenna carefully into the housing and after ensuring the threads are properly engaged rotate clockwise Tighten firmly by hand 5 Replace the battery and battery cover as desicribed in the procedures 040545o Figure 12 Removing the Antenna G Ensure antenna threads are properly en...

Page 31: ...ear housing to release the 2 snaps on the side of the housing See Figure 13 3 Repeat step 2 for the other side of phone 4 When all four snaps have been released carefully lift the keypad bezel away from the phone 5 To replace align the keypad bezel with the phone housing 6 Carefully press the keypad bezel into the phone housing until the snaps engage 7 Replace the antenna battery and battery cover...

Page 32: ...outer edges of the speaker cover to release the latches on each side 3 Slide the speaker cover toward the antenna to remove 4 To replace slide the speaker cover onto the phone 5 Gently press down on the sides of the speaker cover to engage the latches 6 Replace the keypad bezel antenna battery and battery cover as described in the procedures 040347o Figure 14 Removing the Speaker Cover speaker cov...

Page 33: ...2 Remove the two screws at the bottom of the phone near the polyphonic speaker See Figure 15 3 Lift the bottom end of the keyboard stiffener toward the flip knuckles 4 Use the disassembly tool to disconnect the keypad flex connector See Figure 16 032216o Figure 15 Removing the rear housing bottom screws 032216o Figure 16 Removing the Keyboard Flex Connector screw location Keyboard Flex Connector K...

Page 34: ... screws near the polyphonic speaker assembly 10 Replace the speaker cover keypad bezel antenna battery and battery cover as described in the procedures Removing and Replacing the Flip Assembly and Transceiver Board 1 Remove the battery cover battery antenna keypad bezel speaker cover and keyboard stiffener as described in the procedures 2 Use the disassembly tool to disconnect the flip assembly fl...

Page 35: ...e for reuse See Figure 18 4 Carefully separate the flip assembly from the transceiver board and rear housing assembly 032216o Figure 18 Removing the Flip Assembly Screws G This product contains static sensitive devices Use anti static handling procedures to prevent electrostatic discharge ESD and component damage flip assembly screw locations ...

Page 36: ... flip assembly flex connector to the transceiver board 8 Connect the flip assembly flex connector to its socket on the transceiver board 9 Align the flip assembly screw bosses to the screw holes on the transceiver board 10 Hold the assembly together and insert the flip assembly screws into the rear housing assembly and tighten to 1 25 inch pounds 11 Replace the keyboard stiffener speaker cover key...

Page 37: ...n lens edge see Figure 20 3 Insert the flat end of the disassembly tool into the gap created by the knife blade and separate the display lens from the flip assembly 4 To replace align the display lens to the flip assembly Expose the display lens adhesive Carefully press the display lens into position on the flip assembly 5 Replace the transceiver board and flip assembly keypad stiffener speaker co...

Page 38: ...firmly as indicated by the red arrows to remove the flip assembly sleeve See Figure 21 3 To replace insert the flip assembly into the flip assembly sleeve and push firmly until the flip assembly is fully inserted into the flip assembly sleeve 4 Replace the flip display lens transceiver board flip assembly keyboard stiffener speaker cover keypad bezel antenna battery and battery cover as described ...

Page 39: ...er board flip display lens and flip assembly sleeve as described in the procedures 2 Remove the knuckle by removing the hinge assembly side followed by the side where the flex is routed 3 Carefully slide the display flex through the knuckle Avoid damage to the display flex see Figure 22 G The flexible printed cable FPC flex is easily damaged Exercise extreme care when handling 040371o Figure 22 Re...

Page 40: ...ransceiver board 4 Gently press the flex connector into position onto the flex connector socket 5 Lower the display bezel over the display module Gently and firmly press the latches into position Ensure all the latches are engaged 6 Replace the flip knuckle flip assembly sleeve flip assembly flip display lens transceiver board flip assembly keyboard stiffener speaker cover keypad bezel antenna bat...

Page 41: ...to disconnect the flex connector from the display module assembly see Figure 24 3 Carefully lift the display module up and away from the remainder of the flip assembly 4 To replace seat the display module back into the flip assembly 5 Carefully re connect the flex connector 6 Replace the display bezel flip knuckle flip assembly sleeve flip assembly flip display lens transceiver board flip assembly...

Page 42: ...ribed in the procedures 2 Use the plastic tweezers to lift the keypad from the front housing as shown in Figure 25 3 To replace insert the keypad into the front housing ensuring the keys align properly with the openings in the front housing 4 Replace the transceiver board rear housing assembly antenna battery and battery housing as described in the procedures 032220o Figure 25 Removing the Keypad ...

Page 43: ...rd stiffener keypad flex flip flex connector transceiver board flip assembly flip display lens flip sleeve flip display bezel display module assembly as described in the procedures 2 Use the flat edge of the disassembly tool to remove the motor vibrator assembly from the flip housing see Figure 26 3 032232o Figure 26 Removing the Motor Vibrator Assembly motor vibrator assembly ...

Page 44: ...46 June 07 2004 6809485A78 O Disassembly A840 ...

Page 45: ...ntification Each Motorola CDMA phone is labeled with a variety of identifying numbers Figure 27 describes the current identifying labels 020463o Figure 27 CDMA Telephone Identification Label MOTOROLA INC FCC ID IHDT5UV1 EE 3 CANADA 109 182 230A TYPE UVKA 832 2412 CHANNEL OPERATION SWF3001A H7 25821A2 VY SN D414AF0EYAA A56 G6 Mfg by Type approval information NAMPS info analog Transceiver model code...

Page 46: ...nna assembly defective Check to make sure that the antenna pin is properly connected to the transceiver board assembly If connected properly substitute a known good antenna If the fault is still present proceed to b b Transceiver board defective Replace the transceiver board refer to 1c Verify that the fault has been cleared and reassemble the unit with the new transceiver board 3 Display is errat...

Page 47: ...en cleared and reassemble with the new transceiver board assembly 7 Phone does not sense when flip is opened or closed usually indicated by inability to answer incoming calls by opening the flip or inability to make outgoing calls a Flip assembly defective Temporarily replace the flip assembly with a known good assembly If fault has been cleared reassemble with the new flip assembly If fault not c...

Page 48: ...40 Programming Software Upgrade and Flexing Contact your local technical support engineer for information about equipment and procedures for flashing and flexing Related Publications Motorola A840 CDMA User Guide English Spanish 6809482A51 SJJN6405A ...

Page 49: ...6809485A78 O June 07 2004 51 Level 2 Service Manual Troubleshooting Exploded View Diagram Figure 28 Exploded View 3 2 4 5 6 7 8 9 10 11 12 13 14 16 15 18 19 20 21 17 23 25 27 26 24 22 1 ...

Page 50: ...n lens 14 8489450N02 Hinge flex 15 8490009N01 Speaker assy 16 3289413N04 Main display gasket 17 0789918N02 Display bezel 18 5402393T02 Label 19 1589331N02 Keypad bezel assy 20 0187521Y03 keyboard assembly 21 transceiver PC Board Assy 22 0789414N02 Rear endo assy 23 8587488Y01 Antenna 24 0389469N02 Screw stiffener 25 0387791L01 Screw knuckle 26 1589318N03 Speaker cover 27 SNN5695A SNN5615 battery 7...

Page 51: ...luetooth Headset SYN9826A Caller ID Bluetooth Headset TBD Quadrant Bluetooth Speaker TBD Qwerty Bluetooth Keyboard TBD Platform Stereo Headset TBD FM Stereo Headset SYN8609 Retractable Headset new customizable SYN9050 One Touch Headset new customizable SYN9351 Mono Headset Black SYN8390B Mono Headset Silver AAYN4264A Mono Headset new customizable SYN9350 Over the Ear Headset SYN8908 Neck Loop head...

Page 52: ...54 June 07 2004 6809485A78 O Troubleshooting A840 ...

Page 53: ...entification 47 product 5 Introduction 5 K keyboard stiffener removing and replacing 35 keypad removing 44 keypad bezel removing 33 keypad removing and replacing 44 M menu structure 15 motor vibrator Assembly removing and replacing 45 N names product 5 O operation 13 alert settings 15 battery 15 controls indicators and I O connectors 13 icons 15 menu navigation 14 menu structure 15 overview produc...

Page 54: ...y lens 39 flip knuckle 41 keyboard stiffener 35 keypad 44 keypad bezel 33 motor vibrator assembly 45 speaker cover 34 S service manual about 6 audience 6 conventions 7 scope 6 service policy 7 customer support 7 out of box failure 7 product support 7 shut down upon battery removal 16 SIM card personality transfer 47 speaker cover removing and replacing 34 specifications 9 support customer 7 produc...

Page 55: ......

Page 56: ...rks indicated as such herein are trademarks of Motorola Inc Reg U S Pat Tm Off 2004 Motorola Inc All rights reserved Personal Communications Sector Sawgrass International Concourse 789 International Parkway Sunrise FL 33325 6220 6809485A75 6809485A78 O ...

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