Harris Platinum Z2 CD, Manual

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4-30 888-2406-002
WARNING: Disconnect primary power prior to servicing.
Overall System Theory
4.6 Cooling System Description
The transmitter is cooled by the single, two speed fan in the lower rear of the
transmitter. It uses a high volume, low velocity, air system. Air ducting for inlet air
should be well filtered and, if possible, at a slightly positive pressure. The exhaust
air ducting should cause very little or no back pressure due to the low velocity air
system. Air handling recommendations are shown on the Cabinet Outline Drawings
in the schematic package.
Upon transmitter turn on, the fan will run at high speed for one minute, then will
normally run at the low speed until a fault occurs or there is a significant increase in
temperature detected by the controller. The blower motor is a 2 speed, single phase
motor. The fan speed can also be manually set to HIGH speed or AUTO in the
Configuration Menus of the Diagnostics Display.
4.7 Control System Description
The control system is a micro-controller based master/slave system. It monitors
over 100 operating functions in the transmitter and can make intelligent operating
decisions based on operating conditions. It has the standard parallel remote
connections. The microprocessor control system allows fast and efficient
monitoring of the entire transmitter offering a level of protection and diagnostics not
available with a simple logic controller. It also makes changes and upgrades a
simple matter of changing the firmware.
The Controller consists of the following boards:
•
Master Controller Board
•
PA Controller
•
PA Controller #2 (Optional)
•
Power Supply Controller
•
Power Supply Controller #2 (Optional)
•
Life Support Board
•
Display/Backplane Board (motherboard)
All of these boards are located directly behind the transmitter control panel and plug
into the Display/Backplane Board. The entire assembly is considered the “System
Controller”.