Level 2 Service Manual

Troubleshooting

Table 2. Level 1 and 2 Troubleshooting Chart (Continued)

Symptom

Probable Cause

Verification and Remedy

 

 

 

 

 

Replace the transceiver board assembly (refer to

 

c) Transceiver board assembly

1c). Verify that the fault has been cleared and

 

defective.

reassemble the unit with the new transceiver board

 

 

assembly.

 

 

 

6. Receive audio from earpiece speaker is

 

Check speaker connections. If connections are at

a) Earpiece speaker defective.

fault, replace speaker. If connection is not at fault,

weak or distorted.

 

proceed to b.

 

 

 

 

 

 

 

Check to make sure the antenna is installed

 

 

correctly. If the antenna is installed correctly,

 

b) Antenna assembly defective.

substitute a known good antenna assembly. If this

 

 

does not clear the fault, reinstall the original

 

 

antenna assembly and proceed to c.

 

 

 

 

 

Replace the transceiver board assembly (refer to

 

c) Transceiver board assembly

1c). Verify that the fault has been cleared and

 

defective.

reassemble with the new transceiver board

 

 

assembly.

 

 

 

 

 

Replace the Motor/Vibrator assembly. Verify that

7. Vibrator feature not functioning.

Motor/Vibrator assembly defective.

the fault has been cleared and reassemble the unit

 

 

with the new Motor/Vibrator assembly.

 

 

 

 

 

Test a selection of batteries in the rear pocket of

 

 

the desktop charger. Check LED display for the

 

 

charging indications. If these are charging

8. Internal Charger not working.

Faulty charger circuit on

properly, then the internal charger is at fault.

transceiver board assembly.

Replace the transceiver board assembly (refer to

 

 

 

1c). Verify that the fault has been cleared and

 

 

reassemble the unit with the new transceiver board

 

 

assembly.

 

 

 

9. No or weak audio when using headset.

a) Headset not fully pushed home.

Ensure the headset plug is fully seated in the jack

 

 

socket. If fault not cleared, proceed to b.

 

 

Replace the transceiver board assembly (refer to

 

b) Faulty jack socket on transceiver

1c). Verify that the fault has been cleared and

 

board assembly.

reassemble the unit with the new transceiver board

 

 

assembly.

 

 

 

Programming: Software Upgrade and Flexing

Contact your local technical support engineer for information about equipment and procedures for flashing and flexing.

6809495A97-O

May 15, 2006

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Motorola CDMA 800/1900 MHz service manual Programming Software Upgrade and Flexing

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.