Cloud Electronics 36-50 - CXL-3120 - Manual (Page 3)

CXL-3120 Installation Instructions v1.0 3
Proceed as follows:
1. Disconnect the 36-50 from the mains. If it is fitted in a rack, disconnect all inputs and outputs and remove it from the rack.
Orientate the unit with the rear nearest to you. Remove the top cover; retain the eight fixing screws.
2. Remove the blanking plate from the SPEAKER LINE OUTPUTS connector location on the rear panel; retain the plate
and screws, nuts and washers.
3. Identify the empty six M3 holes on the right-hand side of the 36-50’s enclosure (as viewed from the rear). The CXL-3120
module is fixed using these holes and the six hex spacers fitted to the rear of the PCB. Align the spacers with the holes, and
fix with the six M3 screws supplied.
4. Using the jumper cables supplied, connect the 2-pin headers on the CXL-3120 PCB to the corresponding headers on the
36-50 main PCB, located immediately behind the lo-Z output connector - see below. Note that any or all of the three
channels may be converted as required.
OFF ON
Headers for connection of
CXL-3120 transformer module
ZONE 1 UTILITY ZONE 2
Lo-Z output
connector
5. On the 36-50’s main PCB, enable the 65 Hz high-pass filters for the relevant channels. This is important, as low frequency
signals at high level can saturate the transformer cores, causing unpleasant distortion and possibly activating the amplifier’s
limiter circuitry. The jumpers are as follows:
OUTPUT JUMPER
ZONE 1 J5
ZONE 2 J8
Utility Output J9
The approximate locations of the jumpers is shown in the diagram on page 4.
IMPORTANT: The CXL-3120 is preset at the factory for either 100 V-line or 70 V-line
operation, according to territory. The relevant voltage is clearly indicated on the label on the
outside of the box.
If the alternative operating voltage is needed, refer first to the manual section “Changing the
CXL-3120 between and 100 V-line and 70 V-line operation”.