Actually, I was looking for this information for 3 years!...now thanks to you, the manual is on my hands and of great help, cause I understand now where I was doing wrong connections and wires...excellent, I'll be back to you if in need, thank you.
This manual covers the main equipment features only. While it also includes the procedure for saving and loading from the now long obsolete memory cards it does not mention the how to operate with the optional floppy drive interface so I am still at a loss about how to use this! Note that there is a separate manual covering the MIDI interface and programming via the keyboard, not included in this download. You will also need to get hold of this if you want to use the MIDI interface properly. Basically there is little difference between this manual and the free to download manual for the similar PR60 model.
Text excerpt from page 6 (click to view)
CONTROLS
1. Microphone Controls "Mic" (Microphone Trim) This knob adjusts the volume of the main microphone. When turned all the way to the left, the volume is off. When turned to the right, the volume is at a maximum. The Microphone Trim should be turned completely to the left when connecting and disconnecting a microphone from the Quarter-Inch "Microphone" Input on the front panel of the mixer. "Middle" (Microphone Midrange EQ) This knob adjusts the low-tone input sound of the microphone. The center position for this control is flat. Turning this knob to the right increases the low-tone input sound of the microphone. Turning this knob to the left decreases the low-tone input sound of the microphone. "Treble" (Microphone High EQ) This knob adjusts the high-tone input sound of the microphone. The center position for this control is flat. Turning this knob to the right increases the high-tone input sound of the microphone. Turning this knob to the left decreases the high-tone input sound of the microphone. "Bass" (Microphone Low EQ) This knob adjusts the low-tone input sound of the microphone. The center position for this control is flat. Turning this knob to the right increases the low-tone input sound of the microphone. Turning this knob to the left decreases the low-tone input sound of the microphone. "Microphone" (Quarter Inch Microphone Input) One microphone can be connected to this Quarter Inch output terminal. The Microphone Trim should always be at its lowest setting while connecting and disconnecting a microphone to prevent damage to the mixer and/or your audience. "PFL" (Microphone Pre Fade Level Cueing) See Section 4 "Cueing Controls."