Motorola CDMA 800/1900 MHz Removing the Daughter Board, Disassembly tool Daughter board

Page 25

Level 2 Service Manual

Disassembly

Removing the Daughter Board

1.Remove the battery door, battery, rear housing, and antenna as described in the procedures.

2.Insert the disassembly tool under the daughter board and rotate the disassembly tool to unseat the daughterboard from its connector on the main PC board (see Figure 9).

Disassembly tool

Daughter board

060213o

Figure 12. Removing the Daughter Board

3.Lift the daughter board away from the phone.

4.To replace, align the daughter board to the main PC board and then gently press the daughter board connector to fully seat the connector into the main board socket.

5.Replace the antenna, rear housing, battery and battery door as described in the procedures.

6809495A97-O

May 15, 2006

Image 25

Contents Digital Wireless Telephone Page Contents Product Identification IntroductionProduct Names Regulatory Agency ComplianceAudience Computer Program CopyrightsScope Conventions Warranty Service PolicyOut-of-Box Failure Policy Product SupportAccessories and Aftermarket Division AAD Parts ReplacementGeneral Function Specification SpecificationsProduct Overview FeaturesQcelp Personal Information ManagementGeneral Operation Controls, Indicators, and Input/Output I/O ConnectorsUndo/Back Key Menu NavigationHome Screen Display Status IconsActive Roam Line5. Signal Strength Battery Charge Indicator Battery FunctionBattery Removal Operation General Test Equipment and Tools Tools and Test EquipmentDisassembly Battery door latch Removing the Battery DoorBattery Removing and Replacing the BatteryHousing screw locations Removing and Replacing the Rear HousingRemoving the Rear Housing Latches Rear housing Disassembly toolRemoving the Motor/Vibrator Assembly Removing the Motor/Vibrator AssemblyRemoving and Replacing the Antenna Antenna carrier Access slot SnapRemoving the Daughter Board Disassembly tool Daughter boardCamera connector Removing the Camera AssemblyRemoving and Replacing the Speaker Carrier Rear housing Speaker carrier Latch Disassembly toolRemoving and Replacing the Main Board Disassembly tool Flex connectorRemoving the Main Board and Keyboard Main board Keyboard Disassembly toolMain board Grounding gasket Keyboard Removing and Replacing the KeyboardKeyboard Disassembly tool Main board Keyboard Main board Disassembly tool060793o Aligning the Keyboard Adhesive Tape 6809495A97-O May 15 Keyboard Assembly Fixture Apply Main Board to Key Board conductive gasket as shown Display catch Removing the Display AssemblyRemoving the Display Assembly Display Flex Display assembly Front housingKeypad latches Alignment Hole Removing and Replacing the KeypadPersonality Transfer Phone IdentificationIdentification Level 1 and 2 Troubleshooting Chart TroubleshootingProgramming Software Upgrade and Flexing Exploded View May 15 6809495A97-O Exploded View DiagramExploded View Parts List Exploded View Parts ListAccessories Accessories6809497A97-O May 15 Index-1 Index

CDMA 800/1900 MHz specifications

Motorola has long been recognized as a key player in the telecommunications industry, especially with its contributions to mobile communications technology. Among its impressive portfolio, the Motorola CDMA 800/1900 MHz stands out as a significant offering, particularly in the realm of Code Division Multiple Access (CDMA) technologies. This article delves into the main features, technologies, and characteristics of this versatile mobile communication standard.

The CDMA 800/1900 MHz spectrum refers to the frequency bands used for CDMA network deployment, specifically at 800 MHz and 1900 MHz. These frequencies allow carriers to provide robust mobile coverage, enhanced network capacity, and better call quality. The dual-band capability offers a versatile solution for both urban and rural environments, as 800 MHz is known for its ability to penetrate buildings and cover larger areas, while 1900 MHz is effective in densely populated regions.

One of the standout features of Motorola's CDMA technology is its ability to accommodate multiple users on the same frequency channel. This is achieved through code-based separation, where unique codes are assigned to each user. This allows many calls to occur simultaneously without interference, enhancing network efficiency and user experience. Additionally, CDMA technology provides significant improvements in voice quality and clarity, thanks to its advanced error correction algorithms.

Another notable aspect of the Motorola CDMA 800/1900 MHz is its support for various technologies that enhance functionality. The integration of features such as 1xRTT, EV-DO, and later evolutions introduced functionalities like packet data services and faster download speeds. EV-DO (Evolution Data Optimized) significantly boosts data transmission rates, making it ideal for mobile broadband services and applications, such as video streaming and online gaming.

Security is a critical concern in telecommunications, and Motorola's CDMA technology offers robust security measures. The encryption algorithms used in CDMA help protect user data and maintain privacy during voice calls and messaging, ensuring a secure communication environment.

In summary, Motorola CDMA 800/1900 MHz epitomizes reliable and efficient mobile communication. Its dual-band functionality provides expansive coverage and enhances user experience through simultaneous voice and data services. Advanced technologies such as EV-DO and robust security measures further contribute to its appeal. As the telecommunications landscape continues to evolve, the legacy of Motorola's CDMA technology remains a significant part of mobile communication history.