ETC Sensor+ Touring Rack CEM+ to CEM3 Retrofit User Manual

Page 15

The Retrofit

Spider Board Retrofit (only SP96 Large or “Double Small”)

Sensor 96 dimmer touring racks have a “Spider board” installed, which assisted in phase

balancing. This functionality is now handled by CEM3 and the spider board must be

replaced with a new board for proper dimming functionality.

In a double small rack, it is best to access the spider board through the opened left side of

the rack.

In a large frame rack, it is recommended that you access the spider board through the

center column of dimmer modules or through the right side of the rack. When using the

center column, remove enough modules to give you adequate room to access the boards.

The following procedure illustrates the spider board replacement process.

To replace the spider board:

Step 1:

Disconnect the first column of

ribbon cables from the spider

board. This will give you

access to the three mounting

screws. The cables are clipped

and retained in such a way that

labelling them should be

unnecessary.

Step 2:

Remove the three screws that

secure the board to the rack

using a short phillips head

screwdriver. Be careful not to

drop the screws into the rack

as they will need to be

retrieved.

Step 3:

Disconnect the second row of

ribbon cables and remove the

board.

Step 4:

Twist the screws into the

screws holes in the new spider

board. The holes should be

small enough to hold the

screws.

Step 5:

Connect the second row of

ribbon cables removed in Step 3 to the new board.

Step 6:

Align the screws with the screw holes in the rack and tighten using a short phillips

head screwdriver.

Step 7:

Connect the remaining ribbon cables to the open connectors on the spider board.

A small inspection mirror may be useful for this.

Disconnect this row of ribbon cables first