User manual PEAVEY SMR 821A

[. . . ] Intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. CAUTION: To reduce the risk of electric shock, do not remove cover. WARNING: To prevent electrical shock or fire hazard, do not expose this appliance to rain or moisture. Before using this appliance, read the operating guide for further warnings. [. . . ] the Bus Links connector has 5 pins for combining multiple units. Using a 4-pin conductor, shielded cable, you can easily connect between two or more units wiring pin-to-pin across multiple SMRTM821a mixers. Master Output & Bus Link Connections Audio Positive Audio Negative Shield Master Mixer In a linked system, the Master mixer's outputs would be the primary system outputs. The EQ switch places the 4-band equalizer in or out of the Left and Right signal paths. in the Out position the equalizer is completely bypassed. The Bus Link switch is used to place the mixer in the master or slave mode of operation. A stand-alone unit should always be in master mode. To increase the number of available inputs, multiple mixers may be linked together. Select the mixer to be used as the master and place its Bus Link Switch in the Master position. All other mixers in the system should have their link switches in the Slave position. Even though only one mixer is set up as a Master, an output from any mixer in the linked system may be used. Since the buses are linked, all of the input signals are routed to all of the outputs to which they are assigned in the system. This feature allows you to configure remote controls for the Left and Right Level controls simultaneously and the Channel 7/8 select function. The Remote operation connector provides a simple way to make these connections. Remote Volume Control Connections This example is used to simultaneously control the Left and Right Level Controls from a remote location with a simple connection on the back of the unit. If desired, a control voltage can be inserted to "command" attenuation instead of a pot. This voltage is inserted into the "C" input and is positive referenced to SHD. The selection is done by connecting a momentary switch between SEL and SHD. Each time the switch is activated, the channel selection is toggled and alternated between Channel 7 and 8. This remote operation functions in conjunction with the front panel Select Control. A bi-color LED or 2 individual LEDs may be connected as shown in the diagram for remote indication of the selected stereo line input. Configuration Since the SMRTM821a is an analog product, there is not a lot of configuration to worry about. [. . . ] Place the circuit board assembly (with the front and rear panels still attached) into the chassis. Carefully turn the unit upside down and replace the 11 screws securing the circuit board assembly to the chassis. Note: Cuts are typical for each channel where the transformers will be installed. Do not cut these jumpers unless a transformers installed for that channel. [. . . ]