display. Keep holding the buttons down until “Resetting to Factory Defaults” appears in the front panel display. When the PT-7010A has been reset, it will shut off. Turn the PT-7010A back on and it will go to the default screen. It has now been reset. If the PT-7010A has to be reset regularly you should invest in a good quality AC line conditioner or contact Sherbourn for technical support.

Problems Updating PT-7010A Firmware

•Check that the serial cable is connected correctly between the PT-7010A and your computer’s serial port.

If you have a Palm Pilot™ or similar device with “HotSync™” or its equivalent, you may need to disable this software before proceeding. This software ‘seizes’ control of a serial port on your machine and prevents the Sherbourn software from accessing that port. Use another port or disable HotSync.

For additional information regarding technical issues encountered with updating the firmware of the PT-7010A, visit the Sherbourn website at www.Sherbourn.com.

“Hum” Noises

This problem is more than likely caused by a “ground loop” in your system, rather than a fault in the PT-7010A. Follow these steps to isolate the main cause of the hum; there may even be more than one. Remember to turn off all components in your system, including the PT-7010A, before disconnecting or connecting any cables.

Disconnect the following items in order, and check each time if the hum has gone away:

•Disconnect all cables which come from outside the room, such as cable TV, satellite TV, or roof top antennas. Make sure that they are disconnected where they first enter the room, so they are making no connection to the PT-7010A or the TV, or any other component. If the hum is caused by the cable TV line, then you will need a “ground loop isolator.” This is an inexpensive device fitted in line with the coaxial cable feed. Contact your cable company or your Sherbourn Dealer for assistance.

•Disconnect all connections from the PT-7010A to your TV.

•Disconnect any component which has a grounded power cord.

•If the hum persists, disconnect all the source components one at a time from the back of the PT- 7010A, until you identify the problem. (Ground loop isolators are available for audio lines and video. Ask your Sherbourn Dealer for assistance)

•Try moving the speaker cables away from any power cords. Try just one speaker, connecting it to different channels and see if an amplifier channel is bad.

If you are still having a problem, remember that Sherbourn’s dealers and technical support staff will assist you.

Other Probable Causes of Noise

•Speaker noise may also be caused by interference or noise on your AC line. Make sure there are no large appliances sharing the line, or halogen lamps or light- dimming Triac devices.

•Try connecting your system to another AC socket on a separate line.

•If the hum is heard from within the PT-7010A and not through the speakers, this may also be caused by interference on the AC or DC lines. The power transformers may turn this interference into an audible noise. Internal hum can be made worse by a shelf or cabinet resonating, so try moving the PT-7010A to another shelf.

•Try moving your components further away from the TV, especially if you ever notice the screen has changed color in the area closest to the component.

•If you have very high efficiency speakers, these may tend to reveal noises which other speakers do not.

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Sherbourn Technologies owner manual Problems Updating PT-7010A Firmware, Hum Noises, Other Probable Causes of Noise
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PT-7010A specifications

Sherbourn Technologies PT-7010A is an advanced multi-channel power amplifier that has made a significant mark in the audio engineering world. Renowned for its performance and versatility, the PT-7010A caters to both audiophiles and professionals seeking a high-quality audio solution.

One of the standout features of the PT-7010A is its impressive power output. Delivering 100 watts per channel into an 8-ohm load, the amplifier guarantees robust sound reproduction across a variety of audio formats. With the ability to drive both low and high impedance loads efficiently, it handles demanding speaker systems with ease, making it a suitable choice for home theaters as well as professional audio environments.

Another key characteristic of the PT-7010A is its use of Class A/B amplification technology, which combines the efficiency of Class B with the linearity of Class A. This results in a rich, warm sound with minimal distortion, ensuring that the audio signal remains clear even at high volume levels. Additionally, the amplifier features extensive thermal management, allowing it to maintain optimal performance without overheating, thus enhancing its lifespan.

The build quality of the Sherbourn PT-7010A is equally impressive. Constructed with high-grade materials, the amplifier not only ensures durability but also minimizes vibrations that can adversely affect sound quality. Its sleek design makes it an aesthetically pleasing addition to any audio setup, whether in a living room or a commercial venue.

Connectivity is another highlight of the PT-7010A, featuring multiple input options, including balanced XLR and unbalanced RCA connections. This versatility allows for seamless integration with a wide array of audio sources, ranging from home theater systems to professional recording equipment.

The amplifier's user-friendly interface simplifies operation, with easy access to power settings and a front-panel indicator to monitor status. Furthermore, the PT-7010A is designed to be environmentally friendly, with energy-efficient components that reduce power consumption without compromising performance.

In conclusion, Sherbourn Technologies PT-7010A stands out as a powerful and versatile amplifier that combines high performance with advanced technology. Its quality construction, exceptional sound reproduction, and variety of connection options make it an excellent choice for anyone looking to elevate their audio experience, whether in home entertainment systems or professional settings.
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