Fuse Indicators - Crown FM2000A User Manual

3.5 Fuse Indicators

The PA2000 consists of four field-replacable power modules with two amplifiers in
each module. If a module fails, it may be replaced while the unit continues to
operate (at a reduction in output power).
Each of the paralleled amplifiers is protected by a 10 ampere fast-acting fuse.
When a fuse opens, the indicator light next to it comes illuminates and built-in
redundancy allows the unit to continue operation. The fuse can be replaced while
the unit is operating. Fuses 1 and 2 represent amplifiers 1 and 2 on the top left
module. Fuses 3 and 4 represent amplifiers 3 and 4 on the top right module. Fuses
5 and 6 represent amplifiers 5 and 6 on the lower left power module. Fuses 7 and 8
represent amplifiers 7 and 8 on the lower right power module.
Power Out PA1 PA5
PA2 PA6
PA Temp
PA Voltage PA3 PA7
PA4 PA8
Tot Current
fi
3–8
Fault
Antenna PA1 PA2 PA3 PA4
RF Drive
PA Temp
PA DC
Illustration 3–9 Fuse Indicators
Fuses and Indicators
Fuses
PA5 PA6 PA7 PA8
FM2000A User's Manual