Troubleshooting

The Sunfire Amplifier is expertly designed and built to provide years of trouble-free performance. Most problems that occur can usually be solved by checking your setup or making sure that the components connected to the amplifier 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 Sunfire Dealer for assistance.

No sound from one or more speakers

•Speaker cables may have come undone. Turn off your system and check the cables

•The preamplifier volume level is low for the channels concerned. Recheck the preamplifier calibration procedure.

•The preamplifier mute switch is on

•The correct preamplifier surround mode is not selected

•A tape or external processor loop may be engaged on the preamp.

Current source outputs not working

•Check the current source fuse. If it blows often, it is acceptable to replace with a slo-blo 7 ampere fuse.

The amplifier shuts down often or the line fuse blows often

•Check that the positive and negative speaker wires are not shorted.

•Make sure that no speakers are shorted internally. If you have an ohm-meter, disconnect the speaker wires and mea- sure the resistance between the speaker’s positive and negative terminals. If the reading is less than 2 ohms, the speakers may have an internal short. Measure all speakers and check their impedance specifications.

User's Manual

•If you have connected speakers in paral- lel, the overall impedance may be too low. It is recommended that you rearrange the speakers in series to increase the overall impedance, thus taking some of the load off the amplifier.

•Make sure that the amplifier has good ventilation and is not overheating. Use the crystal base to allow good airflow under- neath. If the amplifier is in a closed rack, open up the rear panel or use a quiet fan for improved ventilation.

Hum in your speakers

This may be due to a system ground loop, rather than a problem with the amplifier. Take the following steps to isolate the cause of any hum.

Remember to turn off all components in your system before disconnecting or connecting any cables.

•If your preamplifier has XLR outputs, use them for their improved noise rejection.

•Try to have all of your equipment on the same electrical outlet or circuit. Group all the low power components (preamp, CD player, DVD etc.) on a single outlet or power strip. This is provided that the overall current draw from your equipment does not exceed the rating of the outlet or breaker.

•Disconnect all cables which come from outside of the room, such as cable TV, satellite TV, or roof top antennas. 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, see your TV/video dealer.

•As a test, disconnect any other component which has a grounded power cord.

NOTE: Never remove the ground pin from any power cords. This is very dangerous.

Troubleshooting 21