5-2
Troubleshooting
Table 5-2
Common fault indications
Problem
Possible Cause
Corrective Action
POWER
LED not illuminated.
No power to unit
Check the power connection.
Check the fuse.
Check the ac source.
Blown ac power fuse
Replace the fuse with one rated at
2A, 250 Vac, slow-blow.
OM 1000 powers up but fails
to initialize
BOOTP/TFTP configuration
Check the BOOTP configuration
and all the file paths and names
on the server.
Mechanical error with unit
Repair or replace the unit.
DATA IN
LED indicator fails to
light
No input data received
Check the input cables and
sources.
Check the IP addresses.
Enable the input port.
PLL ERROR
LED lights
Internal failure
Repair or replace the unit.
RF ERROR
LED
lights
RF modulator port in Standby
mode
Put the modulator in the Operate
mode.
Internal failure
Repair or replace the unit.
Main display has poor
readability or blank
Improper contrast setting or bad
display
Adjust the contrast until the
display is optimum, or return the
OM 1000 to the factory for repair
or replacement.
Adjusted port settings did not
take effect
Changes were not committed or
saved through the front-panel
display
Commit and then save the
changes. Reboot the system.
Changes are being overwritten by
the
OM1000.ini
file
The
OM1000.ini
file is being
force downloaded as set within the
OM1000.fof
file. See Section 4,
“Setup and Operation” for steps
on saving the settings.
No serial port communications
available
Port not enabled
Adjust the port settings to match
the settings in the headend
equipment.
The data rate, parity, start bit, or
stop bit settings are not
compatible with the other units in
the headend
Serial port communication
parameters are not compatible
with other headend units.
Logical Ethernet input port
does not receive data (Fault
Sum LED on)
Duplicate UDP port number being
used. Two logical Ethernet input
ports were configured to use the
same UDP port number.
Change the UDP port number to
be unique across the entire
OM 1000.
Testing the RF Modulator
The modulator port has several test modes that can be set through the front panel. Refer to
Section 4, "Setup and Operation." Although these test modes are mainly intended for factory
OM 1000 Installation and Operation Manual