APPENDIX
Your amplifiers shut down often
Check the following:
•Make sure each speaker's average impedance is not less than your amplifiers can safely handle.
•The amplifiers have good ventila- tion, no vents are covered.
•Try setting all the speakers to Small, and let your subwoofers handle the heavy bass.
•Check that the amplifier power output is a good match for your speakers. If your speakers are inefficient, consider using larger power amplifiers.
Reset procedure
The
Warning: the
stored OSD settings and Tuner presets will be erased.
•On page 57, write down your calibration settings, input settings, Tuner presets, and any other set- tings you have made.
•Press the power button to turn the unit off, or turn it off from the wall for a moment.
•Press and continue to hold down the front panel Power button and the Tone DOWN button at the same time.
•The
•When the
54
•Turn the
•If the
Updating firmware problems
•See page 51
•If you have a Palm Pilot™ or simi- lar device with “HotSync™” or its equivalent, you may need to dis- able this software before proceed- ing. This software ‘seizes’ control of a serial port on your machine and prevents the Sunfire software from accessing that port. Use an- other port or disable HotSync.
•Check that the serial cable is con- nected correctly between the TGP- 5 and your computer's serial port.
A Hum is heard in your speakers
This problem is more than likely caused by a “ground loop” in your sys- tem, rather than a fault in the
•Remember to turn off all compo- nents in your system, including the
•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
•Disconnect all connections from the
•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
•Ground loop isolators are available for audio lines and video. Ask your Sunfire 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 Sunfire’s dealers and technical support staff will as- sist you.
Other 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
•Try connecting your system to an- other AC socket on a separate line.
•If the hum is heard from within the
•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 show up noise which other speakers may not.
User's Manual