Neumann.Berlin KH 420, Руководство по эксплуатации

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22
| KH 420
Adjusting the brightness of the Neumann logo
WARNING
Danger of hearing damage due to unexpected high sound pressure levels!
If the Neumann logo is switched off, it is not obvious whether the product is switched on or off. In this case, unex-
pected high sound pressure levels can cause hearing damage.
X
Always set the audio sources connected to the loudspeaker to a low output level before they deliver an audio
signal.
X
If you switch off or dim the Neumann logo, mention this to everyone who works with this loudspeaker or the
connected audio sources.
To dim or switch off the Neumann logo in low light level environments or when the loudspeaker is placed behind an
acoustically transparent screen:
X
Set the DISPLAY BRIGHTNESS switch
0
to:
• “30 %”, “60 %” or “100 %” to adjust the Neumann logo to different brightness levels.
• “OFF” to switch off the Neumann logo.
When the loudspeaker’s protection system is active or invalid digital signals are connected to the DIM 1 acces-
sory, the color of the Neumann logo changes from white to red. The brightness of this red limiter indication
corresponds to the setting of the DISPLAY BRIGHTNESS switch
0
(“30 %”, “60 %” or “100 %”). However, you
cannot completely switch off the limiter indication, as it appears with a brightness of 30 % even if the DISPLAY
BRIGHTNESS switch
0
is set to “OFF”.
Cleaning and maintaining the KH 420
CAUTION
Damage to the product caused by liquids!
Liquids entering the product can cause a short-circuit in the electronics and damage or even destroy the product.
X
Keep all liquids away from the product!
X
Before cleaning, disconnect the product from the mains power supply.
X
Use a soft, dry, and lint-free cloth to clean the product. Do not use any solvents or cleaning agents.
X
Never touch the driver diaphrams.
X
Check the Accelerate Heat Tunneling™ cooling fins for any build-up of dust and fluff every six months.
The cooling fins can be cleaned without opening the electronics panel:
X
Blow clean compressed air into the heatsink vents on the side of the electronics panel.
Troubleshooting
Problem Cause Solution
The Neumann logo is off, no
sound is heard from the KH 420 The KH 420’s internal main fuse
has blown. Have the product checked by an
authorized Neumann service partner.
The Neumann logo is off or not
clearly visible, but sound is
heard from the KH 420 The Neumann logo is switched off
or dimmed. Switch on the Neumann logo
and switch off the dimming (see
page 22) .
The Neumann logo is flashing
red but there is no sound A DIGITAL signal is selected on
the SIGNAL SELECT rotary switch
L
but there is no valid audio
signal connected to the digital
input.
Connect a valid signal to the digital
input, check the cabling, or set the
SIGNAL SELECT rotary switch
L
to
ANALOG.
EN