Lots of information around signal, master, line input, panel connector, digital effect, microphones, stereo phone, line level, effect, and channel are described in the owner’s manual. This owner’s manual presents discussion such as switch master, main speakers, stereo output, power, switches, jacks, level, lower switch, output jacks, and internal.
In this owner’s manual you can read things about line, input jacks, mic, gain, input channels, channels, panel, fader, fader signals, and output. These are some excerpt from the owner’s manual:
DIGITAL EFFECT MONI control—This knob adjusts the level of the return signal which is sent from the internal digital effect to the MONI bus. ST control—This knob adjusts the level of the return signal which is sent from the internal digital effect to the ST bus. Effect select switches—These switches select the effect type for the internal digital effect: VOCAL, L HALL (large hall), or S HALL (small hall). Do not attempt to turn off all switches or to simultaneously press two or more switches, since this will cause malfunctions.
In addition, this owner’s manual contains more about signals, phantom power, indicator, control, input, master fader, jack, monitor, knob, and inputs.