Harman Kardon HKSUB 12, Service Manual

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TROUBLESHOOTING
9
TROUBLESHOOTING
SYMPTOM SOLUTION
If you used the • Check that receiver/amplifier is on and a source is playing.
Speaker-Level Inputs
¡
• Check that the HKSUB 12 is plugged into an active electrical outlet and is switched on using the Master
and there is no sound Power Switch
⁄
.
from any of the speakers: • Check all wires and connections between receiver/amplifier and speakers. Make sure all wires are connected.
Make sure none of the speaker wires are frayed, cut, punctured or touching other wires or terminals,
which may cause a short.
• Review proper operation of your receiver/amplifier.
If there is low (or no) • Make sure that all speakers have been correctly connected in phase, with the (+) terminal on the speaker
bass output: connected to the (+) terminal on the receiver/amplifier, and the (–) terminal on the speaker to the (–) terminal
on the receiver/amplifier.
• Check that the HKSUB 12 is plugged into an active electrical outlet and is switched on using the Master
Power Switch
⁄
.
• Slowly turn the Subwoofer Level Control
‚
clockwise until you begin to hear the desired amount of bass.
• If you are using either the Line-Level Full-Range Inputs
£
or the Line-Level Subwoofer (SUB)
Input
¢
, make sure you have properly configured your receiver or processor to enable its subwoofer output.
• If you are using the Line-Level Full-Range Inputs
£
, try adjusting the crossover setting using the
Crossover Frequency Control
ª
.
• If you are using either the Speaker-Level Inputs
¡
or the Line-Level Full-Range Inputs
£
with a full-range output from your receiver or processor, switch the High-Cut (Low-Pass) Filter Switch
•
to the
ON
position.
• Switch the Phase Switch
∞
from the
NORMAL
to the
REVERSE
position, or vice versa.
• Review proper operation of your receiver or processor and amplifier.
10
HKSUB12 harman/kardon