Troubleshooting, Servicing Your Transceiver

UC343FH 10/23/03 2:32 PM Page 10

Troubleshooting

Problem	Suggestion
Unit does not power up	❑ Check the ignition key position.
	❑ Check power cord connections.
	❑ Check fuse.
	❑ Check vehicle electrical system.
No reception	❑ Check microphone connection.
	❑ Set CB/WX/PA switch to CB.
	❑ Check VOLUME and SQUELCH.
	❑ Check antenna.
	❑ Check antenna connection.
	❑ Set RF GAIN to MAX.
Poor Reception	❑ Check VOLUME and SQUELCH.
	❑ Be sure antenna SWR is normal.
	❑ Set RF GAIN to MAX.
	❑ Check and adjust DELTA TUNE.
No Transmission	❑ Set CB/WX/PA switch to CB.
	❑ Check microphone connection.
	❑ Check MIC GAIN and adjust to MAX.

Low Transmission	❑ Be sure antenna SWR is normal.
	❑ Check MIC GAIN and adjust to MAX.

If you do not get satisfactory results after performing the above checks, call the Uniden Customer Service Center at 1-800-297-1023, 8:00 a.m. to 5:00 p.m. CST, Monday through Friday.

Servicing Your Transceiver

Technical information, diagrams, and charts are provided on request. It is the user’s responsibility to see that this radio is operating at all times in accordance with the FCC Citizens Radio Service regulations. We highly recommend that you consult a qualified radio/telephone technician for servicing and aligning this CB radio product. Please read the Warning information on page 1 of this Guide.

When ordering parts, be sure to specify the correct model number and serial number of the unit.

PC78 specifications

The Uniden PC78 is a robust and versatile CB radio that has earned a reputation among enthusiasts for its reliability and performance. As a part of Uniden’s long-standing tradition of quality communication devices, the PC78 is designed for both casual users and serious CB radio operators.

One of the standout features of the Uniden PC78 is its sleek design coupled with a user-friendly control interface. The radio comes with an easy-to-read LCD display that illuminates for visibility in low-light conditions. This feature is essential for nighttime operations, allowing users to easily see channel numbers and other vital information without straining their eyes.

The PC78 operates on the 40-channel Citizens Band frequency, providing ample options for communication. It also includes an automatic noise limiter, which helps to reduce background noise and ensure clearer audio quality during transmissions. This technology is especially useful in areas with significant electronic interference, helping users maintain a clear connection.

Another key characteristic of the Uniden PC78 is its power output. The radio operates at 4 watts of maximum power, which is standard for most CB radios, ensuring that users can communicate effectively over reasonable distances. Additionally, the radio is equipped with a built-in SWR (Standing Wave Ratio) meter, which allows users to tune their antennas for optimal performance, ensuring maximum signal strength and clarity.

The PC78 also supports an array of advanced features, including automatic squelch control, which automatically mutes the speaker when no signals are present, preventing unwanted noise. The dynamic squelch control further enhances this feature, adapting to varying signal levels.

Furthermore, the Uniden PC78 includes a dual watch function that allows users to monitor two channels simultaneously, facilitating communication flexibility. Users can easily switch between their primary channel and a secondary one, making it easier to stay updated on different conversations.

In terms of durability, the Uniden PC78 is built to withstand the rigors of daily use, making it suitable for both in-vehicle and base station setups. Its sturdy construction ensures long-lasting performance, making it a reliable choice for both everyday use and rugged environments.

In conclusion, the Uniden PC78 is a feature-rich CB radio that combines advanced technology with user-friendly operation. Its clarity, durability, and range of functionalities make it an excellent choice for anyone looking to enhance their communication capabilities in the CB radio realm. Whether for work or leisure, the PC78 stands out as a dependable option in the competitive market of CB radios.