Troubleshooting Guide

Three Things to Keep in Mind

As you become familiar with the Digital 8•Bus, you’ll find it helpful to keep these three questions in mind at all times:

1.What Fader Bank is selected?

2.What channel is selected?

3.What is the V-Pot assignment?

In 90% of the cases, if something isn’t working as

you expect it should, it’s because one of these three settings isn’t where you intend it to be.

No power!

•Our favorite question: Is it plugged in? Make sure the power cord is securely seated in the IEC socket and plugged all the way into the AC outlet.

•Our next favorite question: Is the POWER switch on? If not, try turning it on.

•Is the Fat Channel Display working? If not, make sure the AC outlet is live (check with a tester or lamp). If so, refer to “No Sound” below.

•Make sure the DC power cable is securely connected at the rear panel of the console.

No Sound!

•Is the signal source working correctly, and properly connected to an input on the console?

•Is the TRIM control (channels 1–12) or the Digital Trim control (channels 1–48) turned all the way down?

•Is the MIC/LINE switch set to the correct position?

•Is the channel fader control turned up?

•Has the channel been assigned to an output bus in the Bus Assignment Section?

•Is the master level control for the selected output bus turned all the way down?

•Try soloing a channel and listen to the Control Room Outputs, or use headphones connected to the Phones Out (with Control Room selected in the Phones/Cue Mix Section). Make sure the Solo Level is turned up in the Studio/Solo Section, and the Control Room Level is turned up in the Control Room Section.

Bad Sound

•Is the input connector plugged completely into the jack?

•Is it loud and distorted? Turn down the output level on the console.

•Are any of the meters hitting the “OL” mark? Try turning down the TRIM control (channels 1–12) or the Digital Trim control (channels 1–48). Or try turning down the signal source volume control.

•Solo the signal source and listen to it in the Control Room Output, or with headphones in the Phones output. Select PFL SOLO in the Studio/ Solo Section. Make sure the SOLO LEVEL control is turned up in the Studio/Solo Section, and the Control Room LEVEL control is turned up in the Control Room Section. If the signal sounds bad with PFL SOLO selected, the problem lies somewhere before the channel fader, with the source itself or the input settings on the console. If the signal sounds okay, the problem lies somewhere after the channel fader, with the output settings or the amplifier/speaker combination after the console.

Noise/Hum

•Check the signal cable between the console and the power amplifier. Make sure all connections are secure.

•Make sure signal cables are not routed near AC cables, power transformers (wall warts), or other EMI sources.

•Is there a light dimmer or other triac-based (SCR) device on the same AC circuit as the console? Use an AC line filter or plug the console (along with all other audio equipment) into a different AC circuit.

•If you’re connecting an unbalanced source to the balanced input using an XLR or TRS connector, try disconnecting the unbalanced ground from pin 1 (XLR) or sleeve (TRS).

D8B Manual • Appendices • page 143