Appendix A: Service Information
If you think your Mackie product has a problem, please check out the following troubleshooting tips and do your best to confirm the problem. Visit the Support section of our website (www.mackie.com/support) to get some ideas or contact our technical support heroes. You may find the answer to the problem without having to send your Mackie product away.
4.Replace the fuse drawer by pushing it all the way back into the IEC socket.
If two fuses blow in a row, then something is very wrong. Try a different outlet in a totally different location. If fuses continue to blow, see the “Repair” section on the next page to find out what to do.
Troubleshooting
No Power
•Our favorite question: Is it plugged in?
•Make sure the line cord is securely seated in the line cord socket and plugged all the way into the AC outlet.
•Make sure the AC outlet is live (check with a tester or lamp).
•Is the POWER switch in the ON position?
•Is the power LED on the rear panel illuminated?
If not, make sure the AC outlet is live. If so, refer to “No Sound” below.
•If the power LEDs are not illuminated, and you are certain that the AC outlet is live, it is possible the fuse has blown.
To remove and replace the fuse:
1.Disconnect the power cord from the IEC socket.
2.Remove the fuse drawer using a small screwdriver. It will slide all the way out.
3. Remove the fuse
| and replace it with |
| an |
FUSE | fuse. |
|
115 VAC unit: 6.3 amp
230 VAC unit: 3.15 amp
No Sound
•Is the power LED on the rear panel illuminated?
•Is the LEVEL control turned up?
•Is the signal source turned up? Make sure the signal level from the mixing console (or whatever device immediately precedes the subwoofer) is high enough to produce sound.
•If it’s a stereo pair, try switching them around.
For example, if a left subwoofer is presumed dead, switch the left and right cords at the subwoofers. If the problem switches sides, it’s not the
Bad Sound
•Is the input connector plugged completely into the input jack?
•Is something connected to an output jack? Try unplugging it. If the sound improves, whatever was plugged into the output jack may have affected the signal.
•Is it loud and distorted? Reduce the signal level at the mixer.
•If possible, listen to the signal source with headphones plugged into the preamp stage. If it sounds bad there, it’s not the subwoofer.
•Too much bass or not enough bass? Move around the room and see if the bass response changes. It’s possible your listening position coincides with a room mode where the
low frequencies either become exaggerated or nulled. If so, try using an alternate polarity switch position, moving the subwoofers to a different location in the room, or moving your listening position.
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