Troubleshooting - HQ-Power VPA2300MB Manual Del Usuario

10. Operation
After connecting your amplifier to the mains, turn both gain controls in an anticlockwise direction to the minimum
position. The last device to be switched on is the amplifier. The POWER and PROTECT LED light up now. If not,
check if the amplifier is properly connected to the mains.
After the activation delay the speakers are activated (PROTECT LED is off).
After setting the volume controls of the pre-amplifier in the minimum position, turn the gain controls of your amplifier
to the midway position. If there is any humming, check the connection cables between the pre-amplifier and your
amplifier (switch off components first). Now adjust the volume with gain controls CH-1 and CH-2.
CAUTION! Never set the level of the individual channels so high that the LIMIT LED remains lit continuously. Make
sure the output signal isn't distorted to avoid damage to your speakers.
All important operating modes of the amplifier can be monitored on the front panel.
SIGNAL
LIMIT
PROTECT
When operating the amplifier system, make sure the sound quality of the loudspeakers is OK. Distortion indicates
that either the amplifier or the loudspeaker is overloaded. Overloads can quickly lead to amplifier or speaker damage.
Reduce the volume immediately to avoid damage. The warranty becomes void when the speaker systems are
damaged by overload.
Always check the sound pressure level with a meter in order not to surpass threshold values.
If you want to switch off the system, switch off the amplifier first and then the pre-amplifiers in order to avoid
transients on the speaker.

11. Troubleshooting

PROBLEM
No power.
No sound.
Noise.
Fan does not work; LEDs do not
light.
PROTECT LED stays lit.
VPA2300MB
output level
short circuit or impedance too low or signal distorted
activated momentarily when switching on or when one of the protective circuits is activated.
• The power cord is not connected.
• The power cord of the respective
device is not connected properly or
not connected at all.
• The connection socket or the plug
is dirty.
• The input signal is too strong.
• The power cord is not connected.
• Inputs receive DC voltage.
• Overheating due to clogged fan
grille.
• Impedance of speakers too low.
• Short circuit in speaker connection
or in speaker.
• Technical default of amplifier
POSSIBLE CAUSE
9
SOLUTION
• Check the power cord and any
extension cables.
• Check if the power cord and the
plugs are tightly connected with the
sockets.
• Clean the socket and/or the plug.
• Reduce the input signal with the
gain control.
• Connect the power cord.
• Switch amplifier off and have the
device checked by a service
technician.
• Clean the fan grille.
• Connect other speakers.
• Check speakers.
• Switch amplifier off and have the
device by a service technician.
HQ POWER