JBL CSA 2120Z Audio Amplifier (2 x 120W) - Manual (Page 20)

20
4.0 Troubleshooting
CONDITION: No power to the amplifier so that the power ring is not illuminated.
POSSIBLE REASON: The amplifier is not plugged into the power receptacle
CONDITION: No sound or low sound.
POSSIBLE REASON: The input signal is not present or at a very low level.
POSSIBLE REASON: The Master Volume control is turned down.
POSSIBLE REASON: A CSR-V is connected and turned down.
POSSIBLE REASON: The Hi-Z switch is OFF while using the 70V or 100V outputs.
POSSIBLE REASON: The power switch is OFF. (Note that while plugged in, the
amplifier will be in standby mode and the power ring will be
green until the power switch is activated
and the power ring will turn blue.)
CONDITION: Distorted sound.
POSSIBLE REASON: Input signal level is too high. Please turn down the input level
controls. Note that theamplifier should not be operated at a
level that allows the clip indicator to be constantly ON.
POSSIBLE REASON: Master Volume is too high.