Installation and Operating Manual

User Manual
040003A010 Rev A Page 20 of 25
PWR ON
EXCITER DRIVE
/ RF DRIVE
OUTPUT POWER
STATUS
PA FAULT
CHECK FAN
HI TEMP
HI VSWR
HI INPUT
LOW OUTPUT
OTHER
SYMPTOMS
POSSIBLE
CAUSE
SUGGESTED
ACTIONS
ON
ON
No
power
High
ON
One or
more
inactive
fans
Fan failure
Turn off input drive.
Allow amplifier to cool.
Disconnect AC cord.
Try removing any
obstacles from fan
blades if present.
Obtain RMA to have
amplifier checked at
factory.
ON
ON
No
power
High
ON
Output load VSWR
is above 3:1.
Turn off input drive.
Check output
connections and
cables for integrity and
tightness.
Check antenna,
combiner, etc. for
proper return loss.
ON
OFF
No
power
Low
ON
Output load VSWR
higher than 3:1 was
detected before RF
input signal was
removed.
ON
ON
Low
power
Low
Low signal is
applied to POWER
CTL pin.
Remove any voltage or
short attached to
POWER CTL pin.
POWER SET
potentiometer is
turned counter
clockwise.
Turn POWER SET
potentiometer fully
clockwise.
4.3 RETURN FOR SERVICE PROCEDURES
When returning products for service to Crescend, please follow the procedures below.
4.3.1 OBTAINING RMA
A Return Material Authorization (RMA) number must be obtained prior to returning equipment to
the factory for service. Please contact our Customer Service Department at 800-872-6233 to obtain
this number. Failure to obtain this RMA number may result in considerable delays in receiving repair
service.
4.3.2 REPACKAGING FOR SHIPMENT
To ensure safe shipment of the amplifier, it is recommended to use the packaging designed for the
amplifier. The original packaging material is reusable. If it is not available, contact Crescend
Customer Service Department for packing materials and information.