Pub. 42004-340E
Model PA250-001 250 Watt Central Amplifier
Page: 10 of 12
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06/02
3.
Check, and replace fuses as needed.
4.
Reinstall top cover securely.
5.
Reconnect ac power.
Service
If the equipment requires service, contact your Regional Service Center for a Return Authorization
number (RA #). Equipment should be shipped prepaid to GAI-Tronics Corp. with a Return Authorization
number and a Purchase Order number. If the equipment is under warranty, repairs or a replacement will
be made in accordance with GAI-Tronics’ warranty policy. Please include a written explanation of all
defects to assist our technicians in their troubleshooting efforts.
Call 800-492-1212 inside USA or 610-777-1374 outside the USA for help identifying the Regional
Service center closest to you.
Troubleshooting
Problem:
Possible Cause:
Possible Solution:
No ac power present.
•
Verify ac power cord is plugged in to ac outlet.
•
Verify ac outlet has proper ac voltage available.
No front panel
POWER ON
indication
Unit’s ac circuit
breaker is tripped.
•
Depress the plunger to reset.
•
Check the internal low voltage power supply fuses on
both amplifier boards.
Blown internal F1/F2
fuses
Check F1/F2 fuses located on both power amp PCBAs.
CAUTION:
Replace with the
same
type/value fuse.
No input signal source
Verify that proper signal/level is being supplied.
Incorrect input signal
connection
Verify that the signal input connection is correctly
connected.
Incorrect setting of
25V/70V LINE
switch
If using the line output speaker connections, insure the
25V/70V LINE
switch is in the
IN
position located on the
unit’s rear.
Incorrect output
connections
Check that the output connection has been properly made.
No audio output
600-ohm/Tel-Page
gain control (rear)
If used, increase level adjustment accordingly.
Note:
Both
VOLUME
and rear gain control affect output
level.
Internal jumper setting
Check that the internal mute jumper is in the A (enabled)
position.
No automatic
muting of Hi-Z
input signal
Insufficient 600-ohm/
Tel-Page gain
•
Check 600-ohm/Tel-Page gain setting.
•
Check 600-ohm/Tel-Page audio signal level is
sufficient.