Hardware

Hardware

Changing the DMX chipset

If your interface is recognized by the software and there is no DMX output from the interface, this problem can be fixed by simply replacing the DMX chip, which users can do themselves very easily.
Note: The "DMX chip" is an 8 pin electronic integrated circuit (IC) component located on the electronic card, with the purpose of "driving" the DMX-512 signal.
We advise all distributors and users to have a spare DMX chip (RS485 driver). It can be available under several references (see below):

USB-DMX Interfaces
	(5V DIP) SP485ECP-L MAX485CPA+ ADM485JNZ
	(3,3V DIP) SP3483EP-L SP3483CP-L MAX3483CPA+	(3,3V CMS) SP3483EN-L SP3483CN-L MAX3483CSA+
		(3,3V CMS) SP3483EN-L SP3483CN-L MAX3483CSA+
	(5V DIP) SP485ECP-L MAX485CPA+ ADM485JNZ
	(5V DIP) SP485ECP-L MAX485CPA+ ADM485JNZ

SP = made by Sipex www.sipex.com
MAX = made by Maxim www.maxim-ic.com
AD = made by Analog Device www.analog.com
LTC = made by Linear www.linear.com
ISL = made by Intersil www.intersil.com

You can purchase any of these components through websites like www.farnell.com or www.radiospares.com.

Notes:
- The SIUDI 5 has DMX IN and DMX OUT. This means that the electronic card uses 2 identical DIP chips (one for input and one for output). If you need urgently to repair the DMX OUT, a quick solution is to use the DMX IN chip (exchange the 2 chips), giving you enough time to shop for a replacement chip. 
- For the SIUDI 1Bis, don't forget to remove the CMS chip if you want to plug a DIP chip
- If your interface requires a 3.3V chip, you could use a 5V chip and it should work, as well.
 
Test of electronic signals (for electronic technicians only)

The DMX DRIVER chip component has 8 pins. Here are the main pins :
Pin 4      DATA INPUT
Pin 5      GROUND
Pin 6      DMX + OUTPUT
Pin 7      DMX – OUTPUT
Pin 8      3,3V or 5V

If there is a correct signal on pins 7 and 8 but nothing on the XLR connector, please check the 4 resistors (see the XLR chapter).
if there is not signal on pin 4, the interface has another problem.

Copyright © 2013 ~ Nicolaudie. All rights reserved.