Instruction manual

Page 11 of 12
5.0 Maintenance
WARNING: Lethal voltages are present within the chassis of the power amplifier
whenever AC power is connected. Users should not attempt repair operations on
components of the power amplifier.
A great deal of care has gone into every power amplifier to verify that it meets or exceeds all its
specifications before it is shipped to you. If you are certain the problem lies in the power
amplifier, check first to determine if the power indicator is illuminated. If it is not, the main AC
mains breaker has likely tripped. Reset the breaker.
After resetting the AC mains breaker, the amplifier may immediately cause another breaker trip. If
this should occur, there could be an amplifier power supply problem and the power amplifier
requires service.
CAUTION: To prevent damage to equipment, NEVER replace a fuse with anything
other than the type specified. Using types other than those specified will void the
warranty and may cause fire or injury to personnel.
The output fuse (located on the front panel) should only be replaced with AGC or 3AG types as
supplied with your system. When removing this fuse, ensure that power is not applied to the
power amplifier.
The output fuse, because of its construction, may interrupt the circuit before a circuit breaker on a
matching network opens. DO NOT substitute a higher value or a different type of fuse. Decrease
the matching network output voltage tap or decrease the level of the signal generator. Consult
Meggitt Sensing Systems for more information about inductive tuning or other special application
assistance.
For piezoelectric shaker systems employing matching networks, there may be another current-
limiting device (such as a fuse, circuit breaker, or thermal cutout) to the amplifier’s output within
the matching network. Consult the matching network’s manual for details.
CAUTION: The power amplifier contains no user serviceable components. Service or
repair of the power amplifier should not be attempted by anyone other than Meggitt
Sensing Systems employees or designated representatives.