Crown Audio FM1000A - Manual (Page 36)

TROUBLE TROUBLE TROUBLE
5–6 FM1000A User’s Manual
5.3.5 Multiple Indicators
Call your Crown Broadcast service representative. See Section 7, Service and
Support, for contact information.
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).
5.3.4 PA DC
Discrepancy in current between the individual amplifiers, or in total current.
❑ 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 35 amps due to antenna mismatch. Examine the antenna
for arcing and moisture. Also, check output power for proper current; the RF
detection circuit could malfunction causing an overcurrent situation.
Fault
Antenna RF Drive PA Temp PA DC
PA1
PA2
PA3 PA4
PA5
PA6
PA7 PA8
Power Out PA Temp PA Voltage Tot Current ALC SWR In Ref
Metering
PA1 PA2 PA3 PA4 PA5 PA6 PA7 PA8
Fuses
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Power
I
O
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