Yamaha PM4000 Owner's Manual (image) - Page 18
a. PM4000 Stereo Input Module - master module
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Figure 2-2a. PM4000 Stereo Input Module (upper portion of module) 2.1.2. The Stereo Input Module The PM4000 comes with at least four stereo input modules, located in near the master section. More of these stereo modules can be ordered in lieu of the monaural input modules. Their position in the mainframe is completely interchangeable with the standard input modules (see Section 6 for details). 1S. 1 2 3 4 5 6 7 8 (ASSIGN switches) These locking switches assign the channel output to group mixing busses 1 through 8. The signal is assigned as follows: the left input signal is routed to the odd-numbered busses, and the right input signal to the even-numbered busses. An LED indicator in each switch turns on when the signal is assigned to the bus. The relative level assigned to any adjacent pair of odd and even busses depends upon the use of the BAL/PAN switch and control [2S]. NOTE: The stereo input modules in mainframe positions #3 and #4 have stereo outputs that are permanently assigned to the ST CH3 and ST CH4 busses. These busses are routed only to the monitor module, and permit direct monitoring of these stereo modules. Internal switches in these stereo modules actually perform the assignment, and, if desired, you need not assign the modules's outputs as shipped from the factory. For that matter, you can assign stereo modules in any mainframe position to either the ST CH3 or ST CH4 bus by means of these on-board selector switches. Moreover, if you do assign the output to ST CH3 or ST CH4, you may decide to cut internal jumpers and thereby defeat the module's output to any of the Group busses. If you do this, the Group Assign switches [1S] will have no function, although BAL/PAN [2S] will affect the feed to the ST CH3 or ST CH4 bus. Refer to the Optional Functions in Section 6 of this manual for details. 2S. BAL/PAN (pushbutton switch) BAL/PAN (rotary control) ST-L-R-L+R (concentric rotary signal selector switch) The locking BAL/PAN switch determines whether the inner rotary control has any effect on the signal or not. When the switch is engaged, the control serves to either balance the stereo signal between adjacent pairs of group mixing busses or to pan the mono signal between these pairs of busses. The ST-L-R-L+R switch, which is concentric with the balance/pan control, determines the nature of the signal being fed to the group and stereo output busses. In ST position, the left Page 2-7