HSU VTF-15H, Руководство пользователя

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8
Repair
If your unit needs service, please re-review the troubleshooting section first.
Contact tech support via e-mail (24/7) or call 1-800-554-0150 9am to 5pm Pacific time, Monday through Friday.
We will try and respond to emails sent to techsupport@hsuresearch.com within two business days.
• Recheck the connections between the source and the subwoofer.
• With the volume on the subwoofer turned to a low setting, try
plugging the subwoofer directly into a CD player or lightly touching
the unplugged end of the input cable. If you hear noise from the sub-
woofer, the problem is with your connection to the system. If you
hear no noise, try turning the volume on the subwoofer up some more.
If you still hear no noise, call/e-mail technical support for author-
ization to send the amplifier back for service.
• If wire is loose, tighten the connector and reconnect.
• Take the driver out of the cabinet and connect to your main amplifier.
If it plays fine, then the amp is bad. If it does not play, then the
woofer is bad. Call/e-mail technical support for authorization to
send non-working part back for service.
• Correct the polarity of the speaker wires by matching the +/- from
the receiver/amplifier to the +/- of the subwoofer’s speaker level input.
• Connect only to the channel that has a true ground ‘ - ’. If neither
channel has a true ground ‘ - ’, e-mail/call technical support.
• Increase the volume of the subwoofer and the subwoofer level or
LFE level on the receiver or other source. It is best to set the level
of the subwoofer relative to the other speakers using a test disk and
a Radio Shack SPL meter, or built-in tones on your pre-amp/pro-
cessor. See “Volume Level” in Step 4.
• When you shut down your equipment, turn off the subwoofer first.
When powering up, turn on the subwoofer last.
The subwoofer is not receiving a
signal.
Subwoofer amplifier is faulty.
Connection between subwoofer
amplifier and woofer is faulty.
Driver or amplifier is faulty.
You used speaker level connections
and have mixed up the polarity of
the wires, thus shorting one channel
of the main amplifier.
You used speaker level connections
and one or both your main amplifier’s
‘ - ’ are not true ground.
Level on subwoofer or receiver’s
subwoofer output is too low.
Noise is being generated by up-
stream equipment.
No output from the
subwoofer (LED
lights up red).
No output from the
subwoofer (LED
turns green).
Little or no sound
from one main
speaker.
Bass output from
subwoofer is low.
S u b w o o f e r
thumps when the
system is being
turned on and off.
Problem Cause Solution