A.  Check that the DMX cable from the desk to the splitter has made proper contact and ensure the cable isn't damaged.
If the above fails, then open the top lid and replace the main DMX Receiver chip IC201 (SN75178) with the spare one provided directly above it on the PCB.
If this chip is faulty there will be no output from any of the XLR connectors.

A.  Ensure all the mascon headers are firmly in their positions.
Check which of the outputs are not working.

• If none of the outputs work, then change IC201 (see above).
• If a set of two outputs don't work then try changing the DMX Driver chip (SN75174) or the Opto-Isolator chip (6N137) associated with the faulty section.

Spare Driver and Opto-isolator chip can be found on the pcb.

Driver chips are           :- IC302, IC402, IC502 & IC602 (SN75174)
Opto-isolator chips are :- IC301, IC401, IC501 & IC601 (6N137)

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