Motorola C331 Service Manual
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Motorola C331 Service Manual

Motorola C331 Service Manual

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Level 2 Service Manual
Dual Band Wireless Telephone
C331
TDMA 1900MHz/TDMA 800MHz/Analog 800MHz

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Summary of Contents for Motorola C331

  • Page 1 Level 2 Service Manual Dual Band Wireless Telephone C331 TDMA 1900MHz/TDMA 800MHz/Analog 800MHz...

  • Page 3: Table Of Contents

    1 and 2 6881040B85 Level 2 Service Manual Table of Contents Table of Contents Table of Contents Introduction ................1 Product Identification .
  • Page 4 Table of Contents July 19, 2002...

  • Page 5: Introduction

    Available on a contract basis, Motorola Inc. offers comprehensive maintenance and installation programs which 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 HTC centers will perform level 4 (full component) repairs.

  • Page 8: Parts Replacement

    When ordering crystals or channel elements, specify the Motorola part number, description, crystal frequency, and operating frequency desired. 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 1850.040 - 1909.960 MHz PCS TX band Channels 2 -1998 f = 0.03 * N + 1849.98 MHz Channels 1 and 1999 are not used. 1930.080 - 1989.860 MHz PCS RX band Channels 2 - 1998 f = 0.03 * N + 1930.02 MHz...
  • Page 10 Specifications Transmitter Function Specification -5.5 to +26 dBm (PL 10 to PL2 for CELL RF Power Output and PCS TDMA 2.38 to +25 dBm (PL10 to PL2 for AMPS Analog 800 MHz RF Power Output 0.407 Watts (26.1 dBm) nominal Digital 800 MHz RF Power Output 0.467 Watts (26.7 dBm) nominal...

  • Page 11: Product Overview

    C331 telephone features voice recognition dialing and Voice note voice recorder. This phone also provides 32 Embedded ring tones including VibraCall vibrating alert and 32 Downloadable/Customizable iMelody ring tones. The C331 is a dual band phone that allows roaming within the TDMA 800 MHz and digital cellular system (PCS) 1900 MHz bands.
  • Page 12 HTML (subsequently filtered to WML) or directly in WML if available. The information is then passed to the mobile subscriber through the mobile network. The C331 microbrowser can be configured for baud, idle timeout, line type, phone number, and connection type. ➧...
  • Page 13 Product Overview Other Features The C331 wireless telephone also features an MP3 player. Detailed descriptions of these and other features are in the appropriate PF 0C34 telephone user guides listed in the Related Publications section toward the end of this manual.

  • Page 14: General Operation

    General Operation Controls, Indicators, and Input/Output (I/O) Connectors The C331 telephones’ controls are on the front and side of the device, and on the keyboard as shown in Figure 1. Indicator icons are displayed on the LCD (see Figure 2).
  • Page 15 Indicator 9 Clock Soft Key Labels 020273o Figure 2. C331 Display Icon Indicators Signal Strength Indicator shows the strength of the phone’s connection with the network. Calls cannot be sent or received when the “no signal” indicator displays. Digital/Analog Signal Indicator shows weather you are receiving a digital ï...

  • Page 16: User Interface Menu Structure

    Settings 020274-o Figure 3. C331 Menu Structure Alert Settings In addition to 32 preset ring tones, C331 telephones allow the user to download 32 additional ring tones through SMS. (Availability is carrier and Network depen- dant). ® Motorola C331 phones incorporate the VibraCall discreet vibrating alert that helps to avoid disturbing others when a ringing phone is unacceptable.

  • Page 17: Battery Function

    Level 2 Service Manual General Operation 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. 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...
  • Page 18 General Operation July 19, 2002 6881040B85...

  • Page 19: Tools And Test Equipment

    Used to measure battery voltage 1. To order in North America, contact Motorola Aftermarket and Accessories Division (AAD) by phone 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 20: Disassembly

    Disassembly Disassembly This section describes how to disassemble a C331 telephone. Tools and equipment used are listed in Table 1, preceding. Many of the integrated devices used in this phone are vulnerable to damage from ESD. Ensure adequate static protection is in place when handling, shipping, and servicing any internal components.

  • Page 21: Battery Removal And Replacement

    Level 2 Service Manual Disassembly Battery Removal and Replacement Remove the rear housing cover as described in the procedures. Slide the battery in the direction of the arrow in Figure 5A. Lift the top of the battery near the antenna up and out of the battery compartment as shown in Figure 5B.

  • Page 22: Removing And Replacing The Antenna

    Disassembly Removing and Replacing the Antenna Remove the rear housing cover and battery as described in the procedures. Unscrew the antenna from the endo housing as shown in Figure 6. Lift the antenna and antenna bushing away from the endo housing. 020443o Figure 6.

  • Page 23: Removing And Replacing The Endo Assembly

    Level 2 Service Manual Disassembly Removing and Replacing the Endo Assembly Remove the rear housing cover, battery, and antenna as described in the procedures. Bend the side grips slightly outward as indicated by the arrows in Figure 7A to release the endo housing latches. Lift the bottom end of the endo housing out of the front housing followed by the top end of the front housing as shown in Figure 7B.

  • Page 24: Removing And Replacing The Endo Housing

    Disassembly Removing and Replacing the Endo Housing Remove the rear housing cover, battery, and antenna as described in the procedures. ® Using a Torx driver with a T-6 bit, remove the six screws from the rear endo housing as shown in Figure 8A. Set the screws aside for reuse.

  • Page 25: Removing And Replacing The Side Grips

    Level 2 Service Manual Disassembly Removing and Replacing the Side Grips Remove the rear housing cover, battery, and endo housing as described in the procedures. Hold the front housing assembly by the top and bottom ends. Lift the side grip on each side out of the front housing as shown in Figure 9. 020444o Figure 9.

  • Page 26: Removing And Replacing The Display Lens

    Disassembly Removing and Replacing the Display Lens Remove the rear housing, battery, endo housing, and antenna as described in the procedures. Using your thumb, apply firm even pressure to the top inside area of the display lens to separate it from the front housing. Be careful not to damage the housing or the display lens mounting tabs at the bottom of the display lens.

  • Page 27: Removing And Replacing The Rear Speaker

    Level 2 Service Manual Disassembly Removing and Replacing the Rear Speaker Remove the rear housing cover, battery, antenna, endo housing, and rear endo housing as described in the procedures. Use metal tweezers to unlatch the three metal clips that secure the rear speaker to the rear endo housing as shown in Figure 11.

  • Page 28: Removing And Replacing The Lcd Module Assembly

    Disassembly Removing and Replacing the LCD Module Assembly Remove the rear housing cover, battery, antenna, endo housing, and front endo housing as described in the procedures. Use the disassembly tool to carefully release the four metal display latches on each side of the display assembly as shown in Figure 12. Carefully lift the LCD module assembly away from the transceiver board.

  • Page 29: Removing And Replacing The Lcd Module

    Level 2 Service Manual Disassembly Removing and Replacing the LCD Module Remove the rear housing cover, battery, antenna, endo housing, and front endo housing as described in the procedures. Use the disassembly tool to unlatch the metal locking tabs on the LCD bracket. Lift the bottom end of the LCD bracket away from the LCD until the tabs at the top of the LCD bracket are clear of the plastic.

  • Page 30: Removing And Replacing The Microphone

    Disassembly Removing and Replacing the Microphone Remove the rear housing cover, battery, antenna, endo housing, and front endo housing, as described in the procedures. Use the pointed end of the plastic tweezers to release the microphone from the frond endo housing as shown in Figure 14. The microphone should come away easily.

  • Page 31: Removing And Replacing The Front Speaker

    Level 2 Service Manual Disassembly Removing and Replacing the Front Speaker Remove the rear housing cover, battery, antenna, endo housing, and front endo housing as described in the procedures. Using the flat end of the disassembly tool gently pry the speaker out of its socket as shown in Figure 15.

  • Page 32: Removing And Replacing The Transceiver Pc Board And Keypad Pc Board

    Disassembly Removing and Replacing the Transceiver PC Board and Keypad PC Board Remove the rear housing cover, battery, antenna, endo housing, and front endo housing as described in the procedures. This product contains static-sensitive devices. Use anti-static handling procedures to prevent ESD and component damage. Insert the flat end of the disassembly tool between the keypad PC board and the transceiver PC board as shown in Figure 16.
  • Page 33 Level 2 Service Manual Disassembly To replace, align the connector on the keypad PC board to the connector socket on the transceiver PC board. Gently press the keypad PC board connector into the socket on the transceiver PC board. Replace the front endo housing, endo housing, antenna, battery, and rear housing cover as described in the procedures.

  • Page 34: Removing And Replacing The Keypad

    Disassembly Removing and Replacing the Keypad Remove the rear housing cover, battery, antenna and endo housing as described in the procedures. Use the disassembly tool to lift the keypad up and away from the front housing as shown in Figure 17. 020453o Figure 17.

  • Page 35: Telephone Identification

    Level 2 Service Manual Telephone Identification Telephone Identification Identification Label Each Motorola TDMA phone is labeled with a variety of identifying numbers. Figure 19 describes the current identifying labels. Type approval Mfg by information MOTOROLA INC. FCC ID: IHDT5UV1 EE 3 CANADA: 109 182 230A;...

  • Page 36: Troubleshooting

    Troubleshooting Troubleshooting Manual Test Mode Motorola C331 telephones are equipped with a manual test mode capability. This allows service personnel to verify functionality and perform fault isolation by entering keypad commands. Press to turn the phone ON. Table 2. Manual Test Mode Commands...

  • Page 37: Troubleshooting Chart

    No test mode required Phone Status --> Other Information Troubleshooting Chart Table 3. C331 Telephone: Level 1 and 2 Troubleshooting Chart Symptom Probable Cause Verification and Remedy 1. Telephone will not turn on or stay on. a) Battery either discharged or Measure battery voltage across a 50 ohm defective.
  • Page 38 Troubleshooting Table 3. C331 Telephone: Level 1 and 2 Troubleshooting Chart (Continued) Symptom Probable Cause Verification and Remedy 3. Display is erratic, or provides partial or a) Mating connections to or from Check general condition of flex and flex no display.

  • Page 39: Programming: Software Upgrade And Flexing

    Level 2 Service Manual Troubleshooting Programming: Software Upgrade and Flexing Contact your local technical support engineer for information about equipment and procedures for flashing and flexing. Programming: NAM Programming Follow this procedure to program the phone’s telephone number. Enter Programming Mode: Press #, enter the carrier System ID number, #, *,N.
  • Page 40 Part Number Charts Part Number Charts The following section provides a reference for the parts associated with C331 telephones. July 19, 2002 6881040B85...

  • Page 41: Part Number Charts

    Level 2 Service Manual Part Number Charts Exploded View Diagram 020319o Figure 19. Exploded View Diagram 6881040B85 July 19, 2002...

  • Page 42: Exploded View Diagram

    Part Number Charts Exploded View Parts List Table 4. Exploded View Parts List Item Motorola Part Item Motorola Part Description Description Number Number Number Number 6187805M01 LCD lens assembly 1588298M01 Housing side grips (2) 0162473R01 Front housing assembly 0388708L01 Torx screw (6)

  • Page 43: Accessories

    Level 2 Service Manual Part Number Charts Accessories Table 5. List of Accessories Description Part Number Extended Capacity Lithium Ion 1100 mAh Battery SNN5595 Standard Lithium Ion 580 mAh Battery SNN5582 Travel Charger, US SPN4940 Desktop Charger with Clock SPN5019 Free Charge Emergency Power Source (blue) 98419 Free Charge Emergency Power Source (yellow)
  • Page 44 Part Number Charts July 19, 2002 6881040B85...

  • Page 45: Index

    1 and 2 Index Level 2 Service Manual Index 0C35 6881040B85 Introduction 1 alert settings 12 antenna, removing and replacing 17, 18 keypad PC board, removing and replacing 29 keypad, removing and replacing 31 battery charge indicator 13 function 13 LCD 10 removing and replacing 16 LCD module, removing and replacing 26...
  • Page 46 Level 2 Service Manual Index side grips 22 transceiver board 27 parts transceiver PC board 29 exploded view diagram 39 revisions exploded view parts list 40 service manual 3 replacement parts 38 product changes 1 identification 1 service manual names 1 about 2 product overview 7 audience 2...
  • Page 48 MOTOROLA, the Stylized M Logo, and all other trademarks indicated as such herein are trademarks of Motorola, Inc. Truesync is a trademark of Starfish Software, Inc. ® Reg. U.S. Pat. & Tm. Off.  2002 Motorola, Inc. All rights reserved.

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