The Expression 2/3 line of consoles has three or four primary sets of LEDs. The first set is on the facepanel, the second set is near the Ethernet and Echelon chips on the main CPU and the third set is located in the far left hand corner just below the CRT #2 connector on the Universal console and the far right below DMX out connectors on the pre-Universal consoles. The fourth set is on the Encoder board on Expression 3.
Location of Facepanel LEDs:Top right hand corner of the Facepanel PCB as you open the console.
Location of Ethernet LEDs:
The LEDs are located on the left hand side, towards the rear of the CPU card on all consoles. The screened board locations change with the processor type.
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