3/6/08
888-2463-001
6-1
WARNING: Disconnect primary power prior to servicing.
Diamond Series™
Section 6
Troubleshooting
6
6.1
Controller Failure Modes
6.1.1
Module Controller
The RF amplifier is self contained and protects itself from external and internal failures.
Due to the number of modules in each PA Cabinet, redundancy is not necessary. The
Module Controllers fail OFF and the pass FET requires an active micro to operate.
6.1.2
Cabinet Controllers
If a Cabinet Controller fails, it will fail so the cabinet remains ON. The phasing control
voltages are locked at the last value before failure of the controller.
PA Cabinet Power Supplies and Cooling system will continue to operate via parallel
ON/OFF commands from the Main controller.
6.1.3
Main Controller
If the Main Controller fails, control of the transmitter will automatically shift to the Life
Support controller. The light bar on the front of the Control Cabinet would turn yellow
and there would be a flashing yellow light on the Life Support Board. During this mode
the Life Support Controller provides basic ON/OFF control. In Life Support mode, both
front panel ON/OFF and Parallel Remote Control functions are active. Upon Main
Controller failure, Exciter A/B and Driver A/B switching is limited to MANUAL
switching from buttons on the Life Support Board. Phasing control voltages are locked
into the last state before failure.
During a Main Controller failure, there is some function loss; GUI control and
monitoring, serial remote control, VSWR Foldback and loss of automatic Fault Strike
(Manual Fault Strike via ON button). The Main Controller can be replaced, while
