7410F IFL Installation and User’s Guide
Troubleshooting
Foxcom Proprietary Information
Document No. 93-006-01-A
36
5. Troubleshooting
The 7410F IFL was tested before it left the factory. However if you are
experiencing difficulties consult the list below for possible solutions. If your
system is still experiencing problems attempt to isolate and identify the
malfunctioning unit.
Table 8 - Troubleshooting
PROBLEM POSSIBLE
CAUSE
1.
Laser LED not on
1.
No DC power to the unit. Possible power
supply problem or AC power input problem.
Check the fuse.
2.
Verify LSRI monitor is -4.8 to -4.2 VDC. If
not, laser may have overheated. Disconnect
power or remove plug in and allow cooling.
Try again with better airflow.
3.
If an optical power meter is available,
measure the optical power out of the
transmitter. The power should be 0.3 to
0.6 mW (-5.5 to -2.5 dBm). If an optical
power meter is not available, then use another
receiver to determine if there is optical power
emerging from the transmitter (use the
5 meter jumper cable). If there is no optical
power, then the transmitter unit is
malfunctioning.
If any or all the above are not within the
guidelines, the transmitter unit is faulty.
2.
Lack of RF signal
present at Receiver, yet
optical power is
functioning.
1.
If the unit has an LNB drive option, verify
that the correct LNB bias is coming down
the center of the RF connector at the
transmit site.
2.
Verify that the dish is pointed and correctly
receiving satellite signals.
Conclusion: If signal still not present then
Transmitter input stage amplifier is defective.
Contact Foxcom.