Led Indicators - QSC BASIS 904zz Hardware Manual

Monitor Chain
The MONITOR CHAIN connector is a 5-pin terminal block connector. Input and output connec-
tions are balanced. The center pin is the shield connection for both the input and output of the
monitor chain. Connection is shown at right. The left-most + and - terminals are for monitor
chain input signals, while the right-most terminals are for monitor chain output signals. When
powered down, a relay connects the input to the output, thus bypassing the BASIS 904zz in the
monitor chain.
RS-232
The RS-232 is a utility serial port for accessing certain diagnostic and setup features. Connect
to an available COM port on your PC and communicate using a terminal control program such
as Windows Hyperterminal.
Use a normal serial data cable with a DB-9 male plug to connect to the BASIS 904zz. To con-
nect the cable, orient the connector properly, then push into the receptacle until it is firmly
seated; tighten the retaining screws "finger tight". Communications should be 9600 baud, no
parity, 8 data bits, 1 stop bit, and flow control Xon/Xoff.
Ports
PORT A through PORT H are QSC DataPorts. When using the BASIS 904zz with QSC DataPort-
equipped amplifiers or QSC DSP products (DSP-3, DSP-4) connect to the BASIS 904zz using
QSC DataPort cables. The 904zz supports up to sixteen channels of DataPort audio and ampli-
fier status monitoring. This can be eight 2-channel amplifiers or two 8-channel amplifier or
other suitable combinations.
If connecting a multi-DataPort amplifier, ensure
all the DataPorts of the amplifier are connected
and that they are all connected to the same
BASIS.
To connect the cable, orient the connector properly, then push into the receptacle until it is
firmly seated; tighten the retaining screws "finger tight".

LED Indicators

When the BASIS 904zz is plugged into a properly functioning AC outlet, it will power up and
briefly display a welcome screen on the LCD display.
POWER Indicator- This blue indicator illuminates when the BASIS 904zz is plugged into a
properly functioning AC source. There is no power switch on the BASIS 904zz. This helps to
prevent accidental system shutdowns.
DIAGNOSTIC Indicator- This red indicator illuminates during the power-on self test, then
should extinguish. If it remains illuminated, this indicates that the self-test has detected an
unexpected event, such as corrupted firmware or a memory boot failure. If the DIAGNOSTIC
LED remains illuminated, try resetting the BASIS 904zz by cycling power off and on once.
Should the indication persist, contact QSC's Technical Services for guidance. During operation,
any system fault will fully illuminate the indicator. During a "flash" update, the indicator will
blink on and off; this is normal. Any error detected will be displayed on the LCD. For purpose of
unit identification, the LED can be remotely turned on using QSControl.net software.
(continued, next page)
Monitor Chain connection.
See explanation, at left.
In
Out
15