Crown Audio FM1000A - Manual (Page 20)

3–4 FM1000A User’s Manual
3.2.1 AC Input Circuit Breaker
The PS1000 supplies power to the PA1000 by converting single-phase 220/240 VAC
into 50 VDC. The PS1000 is protected by a 20 A, double-pole circuit breaker
located on the rear panel. This AC input circuit breaker must be in the “up”
position (as shown below) for operation.
3.2 Power Switches
Illustration 3–4 AC Input Circuit Breaker
10. Verify that the following conditions are present as indicated by the PA1000’s
Digital Multimeter:
a. In Ref—Should read between 0.4 and 0.8 volts (0.5 nominal, dependent
upon power input level).
b. SWR—Should read 1.05 to 1.5.
c. ALC—Should read between 4.00 and 6.00 volts for 1.1 kW output (less
for lower output or danger conditions, i.e. high SWR).
d. Power Out—Should read 1.10 for 1.1 kW output.
e. PA Temp—Should read 35 to 50°C with ambient temperature of 25°C.
The remainder of this section describes the functions of the front and rear panel
indicators and switches of the PA1000 and PS1000.
240 VAC IN
Fans
Power
Control
AC Input
Circuit Breaker
ON ON