Troubleshooting Guide:


Quick Checks for when your ULTRASOUND Amplifier is set up
but does not function.
• Is the power cord properly plugged into an electrical outlet?

• Is there power at the outlet?

• Are the control knobs, Volume, and Master Volume turned up?

• Are the batteries in your guitar pickup system fresh?

• Are the control knobs on your external equipment turned above 1?

• Is the power cord on your external equipment properly plugged into an electrical outlet?

• Are the batteries in your external equipment fresh?

• Are any cords cut, frayed, or damaged?

• Is the instrument properly plugged into the amplifier?
No pilot light.
• Check to make sure the power cord is properly plugged into the amplifier and into the electrical outlet.

• Make sure there is power at the outlet.

• Check the fuse. The fuse is located within the AC power receptacle on the back of the amp. The fuse compartment can be accessed with a small slotted screwdriver. (Be sure to replace the fuse with the same value and style fuse.)
There is a pilot light but no sound from the amplifier.
• Make sure the control knobs, Volume, and Master Volume are turned up. ("5" is a normal setting for most pickup systems.)

• Make sure the batteries in your guitar pickup system are fresh.

• Make sure the control knobs on any external equipment you may be using are turned up.

• Make sure the power cord on any external equipment you may be using is properly plugged into an electrical outlet.

• Make sure the batteries in any external equipment you may be using are fresh.

• Check all of the signal cords you are using. If any cords are cut, frayed, or damaged replace these with a known "good" cord and try your setup again.
The GUITAR CHANNEL works but the MIC CHANNEL doesn't work.
• When using the MIC CHANNEL on the AG-50DS2 and AG-100DS2, there must be a plug inserted into the GUITAR INPUT jack to disable the auto mute function.
The amplifier makes a "squeaking noise" when I turn it on or off.
This noise is caused by the Digital Effects processor powering up or down. This is normal and will not harm the amplifier. To eliminate this, make sure there is not a plug inserted into the GUITAR INPUT jack when turning the amplifier on or off. This will enable the auto mute function of the amplifier so no sound will be heard from the speakers when turning the amplifier on or off.