4 | Resources | Eris™ Series E5 and E8 |
4.2 | Troubleshooting | Owner’s Manual |
4.2Troubleshooting
No Power. First ensure that your Eris E5/E8 is plugged in. If it’s connected to a power conditioner, verify that the power conditioner is turned on and functioning.
If problem still exists, disconnect the power cable from your E5/E8 and check the fuse on the back panel of your E5/E8. The fuse housing is located directly beneath the IEC power cable connection. A blown fuse may look black on the inside or the wire inside might appear broken. A very black fuse is a sign that something may have shorted out. Try replacing the fuse with a new one. The E5 uses
a T1L fuse. The Eris E8 uses a T2L fuse. If the fuse blows again, you will need to contact PreSonus for a repair.
No audio. If your Eris E5/E8 appears to power on but you hear no sound when playing audio from your audio source (the lights are on but nobody’s home), first make sure that the cable connecting your audio source to the monitor is working correctly. Also, verify that the Input Gain control is set to provide enough amplitude for the signal.
Hum. Usually, hum is caused by a ground loop. Verify that all audio equipment is connected to the same power source. If you are not using a power conditioner, we highly recommend that you add one. Not only will this help to minimize hum, it will better protect your equipment from power surges, brownouts, etc.
Use balanced cables whenever possible. If your audio device does not offer a balanced output, you can connect it to a direct box, which will provide a
Finally, make sure that your audio cables are not run near power cables, and use cables that are the appropriate length for your application. Using cables that are too long not only increases the risk of noise, it increases the likelihood that the cables are coiled, which will essentially create an antenna that picks up all kinds of audio interference.