AR 1000T2G8B, Руководство по эксплуатации и обслуживанию

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Model 1000T2G8B
Rev - 29
4.4 TROUBLESHOOTING
Symptom Possible cause
TWT or power supply overtemperature Air inlet filter(s) dirty
Collector heat sink dirty
Inadequate clearance behind TWTA
High air inlet temperature
Defective fan or fan driver
No response when main power turned on Disconnected power cable
Defective circuit breaker
Control module display does not come up; unit does
not beep when powered up Shorted or defective control module power supply
Control module does not boot EPROM(s) missing
Control head PC board defective
Control module "datalink failure" error appears HPA interface failure.
Data steering board failure
Fiberoptic link failure
+15 VDC supply failure
Heater power supply does not come up Defective low voltage power supply module
Defective heater power supply module
No high voltage Keylock switch on INHIBIT or REMOTE
Defective high voltage power supply.
Voltages normal, but no RF output, helix current low No RF input
Defective SSA
Gain turned down
After review of the symptoms of the failure, the user may want to check for a loose connector or component
especially after rough handling of the unit. Look externally for physical damage or loose connectors and
internally for unmated or loose parts
.
The service technician should become familiar with the internal mechanical construction to permit correct
reassembly. Limited troubleshooting may be conducted, with caution, based on the failure symptom and an
understanding of the logic/schematic diagrams
.
4.5 NON-REPAIRABLE MODULES
The Heater power supply (A10010-000), the Grid modulator (A21422-000), the HV filter (A21461-500), and
the Diode/Cap Assembly (A21425-500) are encapsulated modules and are not repairable. Contact an
authorized service representative if replacement modules are needed.