Constellation Audio Hercules II - Manual (Page 12)

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E. If none of these conditions restores power, it is likely one of the amplifier’s internal fuses is blown. Do
not attempt to change the fuse yourself—the amplifier requires the use of special high-voltage fuses
that are not commonly available. Contact your Constellation Audio dealer for service.
2. If the front status indicator LED is illuminated red, push the left side of the front power switch bar and hold
it for 3 seconds. The LED should begin flashing green. If it does, wait for 1 minute for the amplifier to warm
up. When the LED turns blue, the amplifier is ready to use. If the LED glows red but does not change color
when you push and hold the power switch, contact your Constellation Audio dealer.
Amplifier is on but no sound is produced
1. Make sure the front status indicator LED is glowing blue, indicating that the amp is warmed up and in
active mode. If the LED is glowing red, push it and wait 1 minute for the amp to warm up and the LED to glow
blue. Sound should now be restored.
2. If the LED is flashing blue, the amplifier is in mute mode. Push the left side of the front power switch bar
and release it. The LED should glow solid blue and sound should be restored. If not, check to make sure the
rear mute switch is set to Off.
3. If the switch is glowing blue and you hear no audio, try the following steps in order. If any one of the steps
restores the power, there is no need to continue to the next steps.
A. Check to make sure your preamp and signal source are both turned on, and your preamp is not in
mute mode.
B. Make sure the desired source is selected on your preamp.
C. Make sure the source device is putting out signal—i.e., if it is a CD player, make sure that the CD is
playing and not in pause mode.
D. Check the connections between the amplifier(s) and the preamp, and between the preamp and the
audio source device. If a cable is disconnected, reconnect it. If this does not restore sound, try
substituting a different set of cables in order to make sure the original set was functioning properly.
E. Check the connections between the amplifier(s) and the speakers. Make sure the speaker cables
have not come loose. If it has, turn the power off on the amplifier(s), wait for the front LED to glow red,
then re-install the cable.
F. If you are using two Hercules II Stereo amps for biwiring, make sure the input cables are connected to
the right-channel (lower) inputs of the amplifier.
Sound comes from the wrong speaker
If left-channel sounds are coming from the right or vice-versa (i.e., the violins in an orchestral recording come
from the right speaker, not the left), check the cable connections between the amplifier(s) and the speakers,
between the amplifier(s) and the preamp, and between the preamp and the source device. Make sure left-
channel interconnect cables are connected to the left channels of the source, preamp and amp, and right to
the right channels. Make sure the left speaker is connected to the Hercules II Stereo’s left-channel binding
posts, or to the Hercules II Mono or biwired Hercules II Stereos used for the left channel. Check the right
speaker connection in the same way.
Sound comes from only one speaker
1. If you are using Hercules II Monos or biwired Hercules II Stereo amps, make sure both amps are plugged in
and powered up. If you encounter difficulties, follow the troubleshooting steps under “Amplifier will not turn
on” above. If you are using biwired Hercules II Stereo amps, make sure the Biwire switch is set to on.
2. Switch the preamp to a different input and play music from a different source device. If sound now comes
from both speakers, check the connection between the source device and the preamp.
3. If you get sound from only one speaker no matter which preamp input you select, check the cable(s)
connecting the preamp to the amplifier(s) and the amp(s) to the speakers. Make sure the speaker cables are
firmly connected to the amplifier and the speaker, and that the cables have not been damaged. Then check
to make sure the interconnect cables are connected correctly between the source component and the
preamp, and between the preamp and the amplifier(s), and that all of the interconnect cables are in good
condition.