APPENDIX
Troubleshooting Guide
The SunÞre PreampliÞer is expertly designed and built to provide years of
Most problems that occur can usually be solved by checking your setup or making sure that the audio and video components connected to the proces sor are on and fully operational.
The following information will help you deal with common setup problems you may experience during normal use of your unit. If the problems still persist, please contact your SunÞre Dealer for assistance.
No sound from one or more speakers
•Speaker cables may have come undone. Turn off your system and check the cables, and tighten the ampliÞer and speaker binding posts.
•Broken audio cable.
•The balance level is low for the channel concerned.
•The Mute switch is on.
A Hum is heard in your speakers
This problem is more than likely caused by a “ground loop” in your system, rather than a fault in the pre- ampliÞer. 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, in- cluding the preampliÞer, 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 Þrst enter the room, so they are making no connection to the preampliÞer 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 Þtted in line with the coaxial cable feed. Contact your cable company or your SunÞre Dealer for assis- tance.
•Disconnect all connections from the preampliÞer to your TV, VCR or DVD.
•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 preampliÞer, until you identify the problem.
•Ground loop isolators are avail- able for audio lines and video. You can ask your SunÞre Dealer for assistance.
•Try moving the speaker cables away from any power cords. Try just one speaker, connect- ing it to different channels and see if an ampliÞer channel is bad.
•If you are still having a prob- lem, remember that SunÞre’s dealers and technical support staff will assist 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 ap- pliances sharing the line, or halogen lamps or
•Try connecting your system to another AC socket on a sep- arate line.
•Keep power cords away from audio cables.
•Do not place the preampli-
Þer directly on top of a power ampliÞer.
•If the hum is heard from within the preampliÞer and not through the speakers, this may also be caused by inter- ference 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 mov- ing the preampliÞer to another shelf.
•Try moving your components further away from the TV, espe- cially if you ever notice the screen has changed color in the area closest to the compo- nent.
•If you have very high efÞciency speakers, these may show up noise which other speakers may not.
Remote will not work
•Make sure the batteries are not dead.
•Make sure that the preampliÞer front panel receiver window is not obstructed, or tilted away from the listening position.
PreampliÞer does not respond to any controls
•Unplug AC power momentarily, and press the Power button to turn back on
User's Manual
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