HQ Power VPA400MB Notice D'emploi page 10

11. Troubleshooting
PROBLEM
No power.
No sound.
Noise.
Fan does not work; LEDs do not
light.
PROTECT LED stays lit.
12. Cleaning and Maintenance
Have a qualified technician carry out the electric connection!
1. All screws should be tightened and free of corrosion.
2. The housing, visible parts, mounting supports and the installation location (e.g. ceiling, suspension, trussing)
should not be deformed, modified or tampered with e.g. do not drill extra holes in mounting supports, do not
change the location of the connections ...
3. Moving mechanic parts must not show any signs of wear and tear.
4. The electric power supply cables must not show any damage. Have a qualified technician maintain the device.
5. Disconnect the device from the mains prior to maintenance activities.
6. Wipe the device regularly with a moist, lint-free cloth. Do not use alcohol or solvents.
7. There are no user-serviceable parts.
8. Contact your dealer for spare parts if necessary.
13. Technical Specifications
Power Supply
Fuse
Output Power
Stereo 8 ohms
Stereo 4 ohms
Stereo 2 ohms
8 ohms bridged
1KHz 0.1% THD 4 ohms
Frequency Range
Damping Factor
S/N Ratio
THD (Total Harmonic Distortion)
IMD (Intermodulation Distortion)
VPA400MB
POSSIBLE CAUSE
• 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
max. 230VAC / 50Hz
T10A (order code FF10N)
400W
600W
800W
1000W
1200W
20 ~ 20000Hz, ± 0.1dB
450:1
> 105dB
≤ 0.01% @ 8 ohms – 1kHz
≤ 0.01% @ 8 ohms – 1kHz
10
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.
VELLEMAN