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Motorola A840 Service Manual

Digital wireless telephone
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Level 2 Service Manual
A840, A860
Digital Wireless Telephone
CDMA 800/1900 MHz; GSM 900/1800 MHz

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Summary of Contents for Motorola A840

  • Page 1 Level 2 Service Manual A840, A860 Digital Wireless Telephone CDMA 800/1900 MHz; GSM 900/1800 MHz...

  • Page 3: Table Of Contents

    Level 2 Service Manual Contents A840 6809485A78-O Introduction ................5 Product Identification .
  • Page 4 Contents A840 June 07, 2004 6809485A78-O...

  • Page 5: Introduction

    Available on a contract basis, Motorola Inc. offers comprehensive maintenance and installation programs that enable customers to meet requirements for reliable, continuous communications. To learn more about the wide range of Motorola service programs, contact your local Motorola products representative or the nearest Customer Service Manager. Product Identification Motorola products are identified by the model number on the housing.

  • Page 6: Computer Program Copyrights

    The Motorola products described in this manual may include Motorola computer programs stored in semiconductor memories or other media that are copyrighted with all rights reserved worldwide to Motorola. Laws in the United States and other countries preserve for Motorola, Inc. certain exclusive rights to the copyrighted...

  • Page 7: Warranty Service Policy

    Customer’s original units will be 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.

  • Page 8: Parts Replacement

    When ordering replacement parts or equipment, include the Motorola part number and description used in the service manual or supplement. When the Motorola part number of a component is not known, use the product model number or other related major assembly along with a description of the related major assembly and of the component in question.

  • Page 9: Specifications

    Level 2 Service Manual Specifications Specifications General Function Specification Frequency Range 1900 MHz PCS 1931.250 -1988.750 MHz Rx 1851.250 -1908.750 MHz Tx Frequency Range 800 MHz CDMA 869.04 - 893.97 Rx 824.04 - 848.97 Tx 880-915 MHz Tx (with EGSM) Frequency Range GSM 900 925-960 MHZ Rx 1710-1785 MHz Tx...
  • Page 10 Specifications A840 Receiver Function Specification -116 dBm (AMPS, SINAD, C-MSG weighted) Receive Sensitivity Sinad 12dB or greater -104 dBm (CDMA, 0.5% Static FER) 0.5% or less Less than 5% at 1004 Hz, +/- 8 kHz peak Audio Distortion frequency deviation (transmit and receive) Adjacent and Alternate Channel 3% BER max at 107 dBm signal;...

  • Page 11: Product Overview

    Manual switching between CDMA and GSM and GSM and CDMA is supported by a soft button and icons to indicate mode of operation. The A840 telephone consists of a main housing assembly and a flip assembly. The phone has the main circuit board, battery, headset jack, and accessory connector in the main housing assembly.
  • Page 12 Product Overview A840 • Picture Caller ID on External & Internal Display • Digital Camera Features: Photo Album, Slide Show Viewer, 4X Digital Zoom, Auto timer, Shutter Tones, Adjustable Resolution, Adjustable Lighting Condi- tions, Exposure Settings, 4 Image Styles. • Digital Camcorder Features: Adjustable video length for up to 3 minutes,...

  • Page 13: General Operation

    General Operation Controls, Indicators, and Input/Output (I/O) Connectors The A840 telephones’ controls are on the front and side of the device, and on the keyboard as shown in Figure 1. Other hardware features are shown in Figure 2. Left Soft Key...
  • Page 14 A 5-way navigation key allows you to move easily through menus. Color Display The A840 phone features a 176 x 220 pixel, 262K color display. The display provides constant graphical representations of battery capacity and signal strength, as well as the real-time clock.

  • Page 15: Battery Function

    Label 032237o Figure 3. A840 Display Icon Indicators Alert Settings In addition to preset ring tones, A840 telephones allow the user to download additional ring tones. (Availability is carrier and Network dependant). ® Motorola A840 phones incorporate the VibraCall discreet vibrating alert that avoids disturbing others when a ringing phone is unacceptable.

  • Page 16: Operation

    General Operation A840 Battery Removal Removing the battery causes the device to shut down immediately and loose any pending work (partially entered phone book entries or outgoing messages, for example). All batteries can cause property damage and/or bodily injury such as burns if a conductive material such as jewelry, keys, or beaded chains touch exposed terminals.

  • Page 17: Theory Of Operation

    A840 6809485A78-O Level 2 Service Manual Theory of Operation Theory of Operation MSM6300 System Overview QCT’s MSM6300 solution, part of QCT’s MSM6xxx Mobile Station Modem (MSM™) family of chipsets and system. The 6300-series chipset supports cellular-cdma2000, PCS-cdma2000, gpsone position location, EGSM-900, and DCS-1800 handset oper- ation with direct conversions from RF to baseband using RadioOne Zero-IF archi- tecture.
  • Page 18 RF. A single external dualband local oscillator is used for the CDMA and GSM receiver, which will provide the capabilities needed to operate on systems around the world and will simplify the procurement of parts and the cost of designing CDMA/GSM handsets. Figure 4. Motorola MSM6300 System Block Diagram June 07, 2004...

  • Page 19: Pm6050 Device Description

    Level 2 Service Manual Theory of Operation PM6050 Device Description The PM6050 device (Figure 2) integrates all wireless handset power management, general housekeeping, and user interface support functions into a single mixed signal IC. Its versatile design is suitable for CDMA and non-CDMA handsets, as well as other wireless products such as PC cards, modems, PDAs, etc.
  • Page 20 Theory of Operation A840 Figure 5. PM6050 Block Diagram June 07, 2004...
  • Page 21 Level 2 Service Manual Theory of Operation RTR00 Overview The RTR6300 is a RF transceiver IC, an integral component of QUALCOMM’s 6300- series chipset. All 6300-series ICs are highly integrated and fulfill specific func- tions; functional requirements are partitioned between the ICs to yield complete, optimal multi-band, multi-mode transceiver implementations.

  • Page 22: Rfr6000 Overview

    Theory of Operation A840 Phase-locked loop circuits: • PLL#1 and an on-chip VCO supports cdma2000 TX modes • PLL#2 Supports EGSM RX & TX, DCS RX &TX, and CDMA2000 RX modes using an external VCO Supports gpsone using the RFR6000 on-chip VCO Transceiver LO generation and distribution circuits •...

  • Page 23: Rfl6000 Overview

    Level 2 Service Manual Theory of Operation Figure 7. RFR6000 Block Diagram Numerous secondary functions are integrated on-chip as well: the Rx LO generation and distribution circuits; the GPS VCO circuit; and various interface, control, and status circuits. The RFR6000 Zero-IF architecture and highly integrated imple- mentation greatly reduces handset PCB size and material costs compared to earlier- generation RFICs.
  • Page 24 Theory of Operation A840 The RFL6000 IC includes two LNA circuits, one optimized for the Cellular band and one for PCS. The LNAs are separated from all other receive functions contained within the RFR6000 receiver IC to improve mixer LO to RF isolation – a critical parameter in the Zero-IF architecture.

  • Page 25: Tools And Test Equipment

    Used to disassembly the flip assembly 1. To order in North America, contact Motorola Aftermarket and Accessories Division (AAD) at (800) 422-4210 or FAX (800) 622-6210; Internationally, AAD can be reached by calling (847) 538-8023 or by fax (847) 576-3023.

  • Page 26: Disassembly

    A840 Disassembly The procedures in this section provide instructions for the disassembly of a A840 telephone. Tools and equipment used for the phone are listed in Table 1, preceding. Many of the integrated devices used in this phone are vulnerable to damage from electrostatic discharge (ESD).

  • Page 27: Removing The Battery Cover

    Level 2 Service Manual Disassembly Removing the Battery Cover Ensure the phone is turned off. Slide the battery cover latch as shown in Figure 9. Gently lift the top end of the battery cover away from the phone. Lift the battery cover away from the phone. Battery Cover Latch 040546o Figure 9.

  • Page 28: Removing And Replacing The Ruim (Removable User Information Memory)

    Disassembly A840 Removing and Replacing the RUIM (Removable User Information Memory) Remove the battery cover as described in the procedures. Turn the battery cover over and unlock the RUIM latch as shown in Figure 9. Lift the RUIM out of the battery door.

  • Page 29: Removing And Replacing The Battery

    Level 2 Service Manual Disassembly Removing and Replacing the Battery All batteries can cause property damage and/or bodily injury such as burns if a conductive material such as jewelry, keys, or beaded chains touch exposed terminals. The conductive material may complete an electrical circuit (short circuit) and become quite hot.

  • Page 30: Removing And Replacing The Antenna

    Disassembly A840 Removing and Replacing the Antenna Remove the battery cover, and battery as described in the proceures. By hand, rotate the antenna base counterclockwise, as indicated by the red arrows until loose. When the antenna threads are completely disengaged, slide the antenna out of the housing.

  • Page 31: Removing And Replacing The Keypad Bezel

    Level 2 Service Manual Disassembly Removing and Replacing the Keypad Bezel Remove the battery cover, battery, and antenna, as described in the procedures. Turn the phone over and carefully insert the disassembly tool under the keypad bezel and gently bend the bezel outward from the rear housing to release the 2 snaps on the side of the housing (See Figure 13).

  • Page 32: Removing And Replacing The Speaker Cover

    Disassembly A840 Removing and Replacing the Speaker Cover Remove the battery cover, battery, antenna, and keypad bezel as described in the procedures. Insert the disassembly tool under the outer edges of the speaker cover to release the latches on each side.

  • Page 33: Removing And Replacing The Keyboard Stiffener

    Level 2 Service Manual Disassembly Removing and Replacing the Keyboard Stiffener Remove the battery cover, battery, antenna, keypad bezel, and speaker cover as described in the procedures. Remove the two screws at the bottom of the phone near the polyphonic speaker (See Figure 15)..

  • Page 34: Removing And Replacing The Flip Assembly And Transceiver Board

    Disassembly A840 Lift the keyboard stiffener away from the phone. To replace, align the keyboard stiffener to the transceiver board. Connect the keyboard flex connector to its socket on the transceiver board. Lower the keyboard stiffener onto the transceiver board.
  • Page 35 Level 2 Service Manual Disassembly Use the T6 driver to remove the two flip assembly screws. Set the screws aside for reuse (See Figure 18). flip assembly screw locations 032216o Figure 18. Removing the Flip Assembly Screws Carefully separate the flip assembly from the transceiver board and rear housing assembly.
  • Page 36 Disassembly A840 Turn the transceiver board and rear assembly over and lift the transceiver board away from the rear housing.. transceiver board 032216o Figure 19. Removing the Transceiver Board To replace, align the transceiver board to the rear housing assembly and lower it into place on the rear housing.

  • Page 37: Removing And Replacing The Flip Display Lens

    Level 2 Service Manual Disassembly Removing and Replacing the Flip Display Lens Remove the battery cover, battery, antenna, keypad bezel, speaker cover, keyboard stiffener, flip assembly, and transceiver board as described in the procedures. Insert a small knife blade into the seam between the main lens and the flip sleeve edge and pry up the main lens edge (see Figure 20).

  • Page 38: Removing And Replacing The Flip Assembly Sleeve

    Disassembly A840 Removing and Replacing the Flip Assembly Sleeve Remove the battery cover, battery, antenna, keypad bezel, speaker cover, keyboard stiffener, flip assembly, transceiver board, and flip display lens as described in the procedures. Grasp the flip assembly and pull firmly as indicated by the red arrows to remove the flip assembly sleeve (See Figure 21).

  • Page 39: Removing And Replacing The Flip Knuckle

    Level 2 Service Manual Disassembly Removing and Replacing the Flip Knuckle Remove the battery cover, battery, antenna, keypad bezel, speaker cover, keyboard stiffener, flip assembly, transceiver board, flip display lens, and flip assembly sleeve as described in the procedures. The flexible printed cable (FPC) (flex) is easily damaged. Exercise extreme care when handling.

  • Page 40: Removing The Display Bezel

    Disassembly A840 Removing the Display Bezel Remove the battery cover, battery, antenna, keypad bezel, speaker cover, keyboard stiffener, flip assembly, transceiver board, flip display lens, flip assembly, flip assembly sleeve, and flip knuckle as described in the procedures. The flexible printed cable (FPC) (flex) is easily damaged. Exercise extreme care when handling.

  • Page 41: Removing The Display Module

    Level 2 Service Manual Disassembly Removing the Display Module Remove the battery cover, battery, antenna, keypad bezel, speaker cover, keyboard stiffener, flip assembly, transceiver board, flip display lens, flip assembly, flip assembly sleeve, flip knuckle, and display module as described in the procedures.

  • Page 42: Removing And Replacing The Keypad

    Disassembly A840 Removing and Replacing the Keypad Remove the antenna, battery cover, battery, rear housing assembly, flex connector, and transceiver board assembly as described in the procedures. Use the plastic tweezers to lift the keypad from the front housing as shown in Figure 25.

  • Page 43: Removing The Motor/Vibrator Assembly

    Level 2 Service Manual Disassembly Removing the Motor/Vibrator Assembly Remove the battery cover, battery, antenna, keypad bezel, speaker cover, keyboard 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.
  • Page 44 Disassembly A840 June 07, 2004 6809485A78-O...

  • Page 45: Phone Identification

    Identification Each Motorola CDMA phone is labeled with a variety of identifying numbers. Figure 27 describes the current identifying labels. Type approval...

  • Page 46: Troubleshooting

    Troubleshooting A840 Troubleshooting Table 2. Level 1 and 2 Troubleshooting Chart Symptom Probable Cause Verification and Remedy Measure battery voltage across a 50 ohm (>1 Watt) load. If the battery voltage is <3.25 Vdc, a) Battery either discharged or 1. Telephone will not turn on or stay on.
  • Page 47 Level 2 Service Manual Troubleshooting Table 2. Level 1 and 2 Troubleshooting Chart (Continued) Symptom Probable Cause Verification and Remedy Gain access to microphone. Disconnect and substitute a known good microphone. Place a call and verify improvement in transmit signal as b) Microphone defective.

  • Page 48: Programming: Software Upgrade And Flexing

    Troubleshooting A840 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) June 07, 2004 6809485A78-O...

  • Page 49: Exploded View Diagram

    Level 2 Service Manual Troubleshooting Exploded View Diagram Figure 28. Exploded View 6809485A78-O June 07, 2004...

  • Page 50: Exploded View Parts List

    Troubleshooting A840 Exploded View Parts List Table 3. Exploded View Parts List Item Motorola Part Description Number Number 1389819N03 camera bezel 6189691N02 CLI lens 7589314N02 flip stop grommet 1589315N04 knuckles 1589875N04 Barrel cover 0789724N01 Magnesium frame 5587736N01 Hinge assembly 3289412N02...

  • Page 51: Accessories

    Level 2 Service Manual Troubleshooting Accessories Table 4. Accessories Description Part Number Power Solutions Battery Slim LiIon (720mAh) Battery High Performance (1440mAh) SNN5615A Travel Charger Linear U.S. SPN4992 Travel Charger Mid Rate U.S. New ID SPN5037 Travel Charger Rapid U.S. (non-leakage) SPN5049 In-Vehicle Solutions Bluetooth Car Kit...
  • Page 52 Troubleshooting A840 June 07, 2004 6809485A78-O...
  • Page 53 Index Level 2 Service Manual Index A840 6809485A78-O removing 33 keypad, removing and replacing 44 alert settings 15 antenna, removing and replacing 32 menu structure 15 motor/vibrator Assembly, removing and replacing 45 battery charge indicator 15 function 15 removing 31...
  • Page 54 Index A840 motor/vibrator 45 speaker cover 34 replacement parts ordering 8 replacing antenna 32 battery 31 battery cover 29 display bezel 42 display module 43 Flip Assembly and Transceiver Board 36 flip assembly sleeve 40 flip display lens 39 flip knuckle 41...
  • Page 56 MOTOROLA, the Stylized M Logo, and all other trademarks 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...

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A860

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