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Trouble shooting
4
The green card edge POWER LED is not lit
check the PSU indicator to confirm that there is power to the frame
•
•
check the resettable fuses protecting the card - do this by removing the power
to the card for about 30 seconds then restoring the power
if necessary, refer to the power supply trouble shooting guide in the appropriate
•
ICON rackframe manual section
There is no output signal
ensure that the green power LED on the front of the card is lit
•
•
check that the inputs are connected to the rear panel and a valid signal is present
verify that the correct channel is selected - the LED on the button panel should
•
show the same channel number as the CHAN SEL LED on the front of the 4408
module
check the output connection from the rear panel to the monitoring device and
•
the output cable
ensure that the cable wiring and jumper link settings are correct for the
•
configuration used
The button panel will not select a different input
ensure that the jumper PL3 is correctly set to 'BUTTON' on all modules
•
check that the expansion cables are correctly installed
•
check that another, higher numbered, input is not permanently selected
•
The output signal is corrupted
check that jumpers PL4 and PL5 are set correctly for the configuration
•
•
ensure all expansion cables are installed correctly
In a 64x1 configuration, only half of the inputs are being routed
check that the 64x1 SEL line (PL6 ON) from pin 12 of CNTL on the rear panel from
•
each 32x1 block is properly connected to the SEL 1 and SEL 2 pins of the
combiner CNTL connector
check that an audio output is connected from each 32x1 block to the first two
•
combiner inputs
24
4408
Issue 3
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