Pa Dc; Multiple Indicators - Crown FM2000A User Manual

TROUBLE
TROUBLE TROUBLE

5.3.4 PA DC

Discrepancy in current between the individual amplifiers, or in total current.

5.3.5 Multiple Indicators

Call your Crown Broadcast service representative. See Section 7, Service and
Support, for contact information.
5–6
a. The circuit breaker is located on the rear panel of the power supply. If the
breaker has popped out, reset it by pushing it in. If the breaker continues
to trip, check for a short circuit.
b. Check each fan with a volt-ohm meter by disconnecting and testing it for a
short circuit. Replace the fan/fans as needed (see Section 7).
c. If none of the fans have short circuits, there is damage on the winding of
the transformer. It will have to be replaced (see Section 7).
There is a difference of current greater than 2.5 amps between any one of the
4 individual amplifiers. This could occur as a result of a blown or faulty power
module, or a blown fuse; replace as appropriate (see Section 7, Service &
Support).
There is too much total current—power foldback will occur above maximum
total amperage of 65 amps due to some malfunction. For antenna mismatch
check for arcing and moisture. Also, check output power for proper current;
the RF detection circuit could malfunction causing an overcurrent situation.
FM2000A User's Manual