XTZ SUB 12.17, Owner'S Manual

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16
Troubleshooting and service
If you should experience a problem with the operation of your subwoofer, please
check all of the following before seeking service. Following is a simple troubleshooting
guide to assist you.
1. Verify unit is plugged in and that the power outlet used supplies the proper AC
voltage & current.
2. Is the power switch on?
3. Has the external fuse blown? Unplug the power cord from the amplifier, then
use a small screwdriver to remove the fuse holder cartridge (located below the
cord connection), and inspect fuse for damage. If blown, replace with the same
type & value fuse.
4. Is the auto turn on/off properly set for the inputs used?
5. Is the subwoofer receiving an input signal from your source equipment?
6. Have all controls on the subwoofer (volume, crossover, phase, etc.) been
properly set?
7. Is the volume control properly set to match source signal level?
8. If the subwoofer has been running at high levels for an extended period of
time, one of the protection circuits may be engaged;
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Does the built-in amplifier panel feel extremely hot (located on the rear of the
cabinet)?
-
Is your AC power line circuit sufficiently rated to supply adequate VA required
for full amp output? If your powerline is not capable of supplying enough
engergy, the maximum output power will be reduced & distortion may become
audible.
9. If the protection circuitry is active, the unit may cycle on and off until operating
parameters return to normal. Under more serious conditions, the unit may shut
off completely. Normal operation should return upon cooling, but depending on
the type of fault condition you may be required to turn the main power switch off
for several minutes and then back on again to reset the unit.
10. If the unit exhibits a drastic change in output sound, after you check the items
above you may wish to perform the steps below to assist in troubleshooting by
verifying the proper operation of both amplifier module and driver;
-
Turn on your audio equipment, except for the subwoofer’s main power switch,
which should remain “OFF”
-
Prepare to play a 20 to 30Hz sine wave (test tone) from your CD/DVD test
disc, smartphone, computer, or other signal source (note: if you do not have
this type of test signal, contact customer service or your place of purchase
for assistance)
-
Adjust the volume of your equipment & the subwoofer to a medium-high
volume level
-
Start playing the test signal
-
Prepare to carefully listen to the subwoofer’s low frequency output (make sure
the room is quiet)
-
Turn the subwoofer main power switch “ON”
-
After a couple of seconds, you should hear amplifier & driver start playing in
a loud, somewhat uncontrolled fashion, with extra harmonics (warmer fuller
sound that normal)
-
Turn down the volume or stop the test signal after a few seconds
The above process helps determine if both amps & drivers are functional. If
there is no change from the 2nd amplifier and driver powering up, repeat the
test. If you are still unable to hear the 2nd driver and amp power up, further
troubleshooting by a qualified technician may be required.
The following conditions require service by a qualified technician:
-
The unit has been exposed to liquid.
-
The power cord has become damaged.
-
The unit does not appear to operate normally or exhibits a marked change in
performance.
-
Part of the cabinet, drivers, or electronics have been physically damaged.
-
The amplifier (or any amp module) does not power up (if fuses are OK and
proper AC power is applied).