Cloud Electronics 46-120TMedia - Manual (Page 30)

46-120 Installation and User Guide V1.2 30
APPENDIX
PCB jumper locations
The 46-50 has various internal jumpers, the setting of which may require alteration during installation. The diagram below shows
the locations of the internal jumpers (not to scale) on the internal PCBs, and the table below lists each jumper and its purpose,
together with the factory default setting.
Note that the 46-120 has three sub-boards in addition to the main PCB, which also carry one or more jumpers. The sub-boards
are i) the line input sub-board (immediately behind the rear panel line input connectors, ii) the mic control sub-board and iii) the
music control sub-board. Sub-boards ii) and iii) are mounted immediately behind the front panel rotary controls, and vertically
stacked with the music control sub-board uppermost.
Most jumpers have two possible positions; the black square in the symbol indicates the default setting. If any jumpers need to
be changed, turn the 46-120 off and disconnect it from the mains. Undo the 10 screws securing the top cover of the unit and
remove it. Use a pair of small pliers to gently remove the jumpers from the PCB headers and reposition them as required. Refit
the top cover using the original screws.
The main PCB diagram also shows the locations of the sockets for the optional loudspeaker EQ cards (CON2, CON3 &
CON4), the connectors relevant to the CDI-46 Digital Interface card and the Zone output connectors .
CON8
CON17
CON9
CON19
J1 J2
J3
J4
J8
J9
J5
(below sub-board)
LINE INPUT SUB-BOARD
MIC CONTROL SUB-BOARD
MUSIC CONTROL SUB-BOARD J6
J7
J10-J13
J14
J15
J16
J17
J18
CON21
CON22
CON25
CON23
CON13
CON38
CON46 CON45 CON44 CON43
CON41
CON40 CON39