Radyne RCS11, Инструкция по установке и эксплуатации

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RCS11 1:1 Redundancy Switch
Maintenance
TM061 Rev. 1.3 Page 4-1
Section 4 - Basic Troubleshooting and Maintenance
4.1 Basic Troubleshooting and Maintenance
This chapter provides information on the basic troubleshooting and repair procedures for the
RCS11 1:1 Switch that may be performed on-site by qualified personnel. Only minor repairs will
be discussed. For serious failures, the user should not attempt to repair the unit without first
contacting Radyne Corporation for further information and instructions.
4.2 Basic User Checks
Upon the detection of an operational failure, the source of the failure must be determined. Basic
user checks include checking the power line fuses and the various cables and connectors.
4.2.1 Checking the Cabling and Connectors
Problems that appear difficult to solve can often be traced to a loose or defective cable or
connector. As a first check, the user should check all cables within the system for possible
broken or loose connections. Cables that are suspect should be replaced. Also, check the jacks
on the units for bent or broken pins. Also ensure that both AC power cords are properly plugged
into the rear of the RCS11.
4.2.2 Checking the Fuses
*** WARNING ***
High voltage is present on the power supply heat sinks when the power supply is
energized. Use extreme caution when removing the RCS11 top cover when the unit is
powered up. Do not touch the top cover on any of the internal components during
removal or replacement.
***CAUTION***
The appropriate AC power cord must be disconnected before the fuse may be removed.
To keep the RCS11 operational, be sure to disconnect only one power cord at a time.
Also be sure to replace the fuse and the power cord before checking the other fuse.
*** WARNING ***
The AC fuses are located at the front of the RCS11 on the power supply boards inside the
unit. Test the fuse with an ohmmeter or similar device. If necessary, replace the fuse
with a new one of the same size and rating. Failure to do so may result In damage to the
equipment and may result In a fire hazard.
4.3 Major and Minor Faults
Minor faults are failure conditions that do not result in loss of service. Major faults are failure
conditions or combinations of conditions that result in loss of service on one or more channels.
The possible minor fault conditions are as follows:
A failure of one of the Switch’s two redundant power supplies;
A failure of one Demodulator that is being monitored (i.e., a Demodulator that has not
been locked out);
A failure of one Modulator that is being monitored;
A reference clock slip.
The possible major fault conditions are: