Cloud CX163 Installation And User Manual - Page 18

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The diagram below shows the locations of the CX163's internal PCB jumpers (not to scale).

If any jumpers need to be changed, turn the Zone Mixer off and disconnect it from the mains. Undo the 6 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.

The diagram also shows the locations of the socket for the optional loudspeaker EQ cards.

J14

Denotes 2-pin header: jumper may be present or absent

Denotes 3-pin header: jumper may in one of two positions;

black end indicates default setting

Ground loops

If, despite your best efforts, the completed sound system 'hums' you probably have a 'groundloop'. The offending signal source

can often be identified by setting the volume control to minimum, then disconnecting the input leads (both left & right channels)

on each line input until the 'hum' disappears. This problem is often caused by terminating a screened input cable into a signal

source positioned a significant distance from the mixer. A good way of avoiding this potential problem is to use signal sources

(CD players and the like) that are double insulated with no connection to the mains supply earth. If a signal feed were derived

from a second mixer (a club or microphone mixer for example) it would be perfectly normal to expect this to be earthed; we

suggest that a transformer be used to isolate the signal and prevent a noisy loop (see "Music Sources" on page 9).

EMC considerations

The Cloud CX163 fully conforms to the relevant electromagnetic compatibility (EMC) standards and is technically well behaved;

you should experience no operational problems and under normal circumstances, no special precautions need to be taken.

If the unit is to be used within close proximity to potential sources of HF disturbance such as high power communications

transmitters, radar stations and the like, the performance of the mixer may be reduced; we suggest that the microphone cable

screen be connected to the equipment chassis and the line input leads are kept as short as possible.

CX163 Installation and User Guide v1.1

CON 3

CON 6

CON 7

J13

FRONT OF UNIT

Motherboard jumper locations

CON 4

CON 5

J10

J9a

J9b

PCB LAYOUT DIAGRAM.

ONLY PRIMARY COMPONENTS SHOWN.

NOT TO SCALE.

J11

J12