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Preventive Maintenance and Fault-Finding
Do not remove the covers of this equipment. Hazardous voltages are present within
this equipment and may be exposed if the covers are removed. Only Ericsson
trained and approved service engineers are permitted to service this equipment.
Do not remove the covers of this equipment. Unauthorized maintenance or the use
of non-approved replacements may affect the equipment specification and invalidate
any warranties.
This Reference Guide does not include any maintenance information or procedures
that would require the removal of covers.
If the following information fails to clear the abnormal condition, please contact
Customer Services using the information given in the Preliminary Pages of this
Reference Guide.
4.4.2
System Defaults
The system defaults can be restored at any time using the Restore System
Defaults option.
4.4.3
Preliminary Investigations
Always investigate the failure symptoms fully, prior to taking remedial action. Fault
diagnosis for the equipment operator is limited to the following tasks, since the
operator should NOT remove the covers of the equipment:
1. Ensure all leads and connectors are in place and serviceable.
2. Ensure the unit is powered. If not investigate the power source. Check the fuse.
3. Ensure the alarm status LED on the front of the unit is not lit. If it is, investigate
4. Use the C/N Margin display to ensure that the C/N Margin is greater than 0 dB. If
4.4.4
AC Fuse Replacement (Not RX8305)
Please refer to the Installation, Safety and Compliance Information for Ericsson
Compression Products Reference Guide supplied with your product for full details of
how to replace the fuse in your product.
4-6
the Alarm status.
it is not, check the input to the Receiver (when utilizing satellite input).
Warning!
Caution!
EN/LZT 790 0005 R7A
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