Troubleshooting - Diamond Audio DASTX12 Owner's Manual

TROUBLESHOOTING

If you experience operation or performance problems with this product, compare
your installation with the electrical wiring diagram on the previous pages. If problems
persist,read the following troubleshooting tips which may help eliminate the problems.
S Y MP T O M
A m p lifier w ill n o t
p o w er u p .
P ro tec tio n L E D
c o m es o n w h en
am p lifier is
p o w ered u p
No o u tp u t.
L o w o u tp u t.
H ig h h iss in th e
so u n d .
S q u ealin g n o ise
is p resen t.
D isto rted so u n d .
A m p lifier g ets
v ery h o t.
E n g in e n o ise
(static ty p e)
E n g in e n o ise
(altern ato r w h in e)
P O S S IB L E R E ME D Y
Check to make sure you have a good ground connection.
Check that there is at least 12v on the battery (+) terminal
Check that the Remote Input (Turn-On) has at least 10VDC.
Check that the green power LED is lit
Check all fuse, replace if necessary.
Make sure that the Protection LED is not illuminated. If it is lit, shut off
the amplifier briefly, and then Power Cycle (reset).
Turn down the volume control on the head unit to prevent overdriving
the input speaker leads,
Try Power cycling (reset) the amplifier. If the Protection LED still comes
on, then the amplifier is faulty and needs servicing
Check that all fuses are OK.
Check that the power light in on
Check that unit is properly grounded.
Check that the Remote Input (Turn-On) has at least 10VDC.
Check that the input signal connections are plugged in properly.
Readjust the Input Gain Control.
Check the Crossover Control settings, possibly try a higher frequency.
Disconnect all RCA inputs to the power sub's control panel. If the hiss
disappears, then plug in the component driving the amplifier and unplug its
inputs. If the hiss disappears at this point, go on until the faulty/noisy
component is found.
Reset Input Gain. It is best to set the subwoofers input level control as low as
possible. The best subjective signal-to-noise ratio is achieved in this manner.
Try to set the head unit as high as possible (without distortion) and the
subwoofer input level as low as possible.
Check for improperly grounded RCA interconnects. Or possible "blown"
signal ground from headunit. (Some headunits are notorious for this!)
Check that the Input Gain control is set to match the signal level of the head
unit. Always try to set the Input Gain on the subwoofer as low possible. Input
gain is NOT power output!! Check that all crossover frequencies are properly
set.
Readjust the Input Gain Control.
Make sure to NOT use CCA power wire as it will cause these issues alsofrequency.
This is usually caused by poor quality RCA cables, which can pick up
radiated noise. Use only the best quality cables, and route them away
from power cables.
Check that the RCA grounds are not shorted to the vehicle chassis
Check that the head unit is properly grounded.
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