LAWO mc256 MKII, Technical Manual

Page: 267 / 372

mc²56 MKII Technical Manual V5.10.2/1 267
Chapter 4: Service/Maintenance
DALLIS Unit(s)
Master Board: LEDs & Switches
A choice of DALLIS master boards support different connections to/from the Nova73. All versions provide similar
front panel functions:
ACTIVE LED Flashes green when the card’s internal control system is
booted and running.
The ACTIVE LED on each Nova73 module, or DALLIS card,
should blink in time with all other ACTIVE LEDs (at 1Hz).
This shows that the card is synchronous to the rest of the
system. If an LED is out of sync, then check that the card is
fitted correctly, and if the symptom persists, replace the card.
WCLK OK
LED Illuminates in green when the DALLIS is receiving a valid sync
signal.
POWER OK
LED Illuminates in solid green when the DALLIS PSUs are running
normally.
If the LED flashes, then there is a PSU error.
ALARM LED Illuminates in red when the local DALLIS alarm is active.
WCLK Port The DALLIS can be synchronised to an external sync
reference connected to this BNC.
I/O Ports See DALLIS master boards for details on the different I/O
connections.
On some boards, LEDs show the status of the signals
arriving at the connection.
CTRL Port This port can be used to connect a local computer to update
firmware or provide diagnostics.
Silk Screen Shows the part number of the master board.
Further information can be found in the data sheet, available in the " mc2_Nova73_documentation " guide.