Motorola CDMA 800/1900 MHz service manual Keyboard Assembly Fixture

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Disassembly

Q CDMA

8.Attach the main board to the keyboard using the keyboard assembly fixture (see Figure 22). Avoid contact with nearby board components.

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Figure 22. Keyboard Assembly Fixture

9.Press fixture should be set to exert 19 lbf (8,620 gf) at the ram head for 5 seconds. The input pressure can be calculated using the required force & the area of the pistons; P=F/A.

10.Carefully place PCB assembly into the press fixture. Use the alignment pins to hold assembly in place.

11.Once PCB assembly is in place, press the 2 buttons on the side of the fixture.

May 15, 2006

6809495A97-O

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Contents Digital Wireless Telephone Page Contents Product Names IntroductionProduct Identification Regulatory Agency ComplianceAudience Computer Program CopyrightsScope Out-of-Box Failure Policy Warranty Service PolicyConventions Product SupportParts Replacement Accessories and Aftermarket Division AADSpecifications General Function SpecificationFeatures Product OverviewPersonal Information Management QcelpControls, Indicators, and Input/Output I/O Connectors General OperationMenu Navigation Undo/Back KeyStatus Icons Home Screen DisplayActive Roam Line5. Signal Strength Battery Charge Indicator Battery FunctionBattery Removal Operation Tools and Test Equipment General Test Equipment and ToolsDisassembly Removing the Battery Door Battery door latchRemoving and Replacing the Battery BatteryRemoving and Replacing the Rear Housing Housing screw locationsRear housing Disassembly tool Removing the Rear Housing LatchesRemoving the Motor/Vibrator Assembly Removing the Motor/Vibrator AssemblyAntenna carrier Access slot Snap Removing and Replacing the AntennaDisassembly tool Daughter board Removing the Daughter BoardRemoving the Camera Assembly Camera connectorRear housing Speaker carrier Latch Disassembly tool Removing and Replacing the Speaker CarrierDisassembly tool Flex connector Removing and Replacing the Main BoardMain board Keyboard Disassembly tool Removing the Main Board and KeyboardRemoving and Replacing the Keyboard Main board Grounding gasket KeyboardKeyboard Main board Disassembly tool Keyboard Disassembly tool Main board060793o Aligning the Keyboard Adhesive Tape 6809495A97-O May 15 Keyboard Assembly Fixture Apply Main Board to Key Board conductive gasket as shown Removing the Display Assembly Display catchDisplay Flex Display assembly Front housing Removing the Display AssemblyRemoving and Replacing the Keypad Keypad latches Alignment HolePersonality Transfer Phone IdentificationIdentification Troubleshooting Level 1 and 2 Troubleshooting ChartProgramming Software Upgrade and Flexing Exploded View Diagram Exploded View May 15 6809495A97-OExploded 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.