User Manual: PSM2420
4+2 Channel Stereo Rack Mixer
V2.00 (05-2014) © Hill Audio
10
properly, you will create unnecessary noise, as you first dispose of some
already existing signal level, and then later apply amplification (tainted with
noise) to make it up.
Obviously, these two requirements are marking a levelling window that the operator
must match to achieve a good sound with as little distortion and noise as possible.
DANGER
: Excessive volume levels on headphones or other sound
systems may cause hearing damage. Always turn the volume control to
minimum when you switch the unit on, and do not exceed healthy
listening levels.
■
Maintenance and warranty
While we have chosen the best components to make this product as rugged and
reliable as possible, some parts in audio products (potentiometers, faders, switches)
are subject to wear which is a matter of operation cycles, and not of time. While
providing a full time-based warranty according to the country’s of purchase
requirements on the function of the electronic circuitry, we hence have to limit the
warranty on such electro-mechanical parts to 90 days from the date of purchase.
In many cases, malfunction of electro-mechanical parts occurs due to dust
contamination, which may require cleaning of such parts. As the inside of such parts is
not accessible, a common practice is to use cleaning fluids in the shape of sprays.
Please be reminded that many of such fluids contain chemicals which may wash away
the dust but at the same time corrode or damage contact surface and may cause
cosmetic damage to other parts. We hence explicitly exclude any claims for exchange
of damaged part due to mechanical or chemical impact.
Without liability, we recommend CaiLube MCL fader cleaner and lubricant available
from CAIG Laboratories if the need of cleaning for electro-mechanical parts occurs.
Further to that, this unit does not need regular maintenance. The internal electronics
are protected by a 5x20mm fuse. The fuse can be accessed by the small drawer at the
AC inlet. To change the fuse, unplug the AC cord first, pull out the fuse drawer and
replace the fuse ONLY with a fuse of SAME voltage and rating. If the fuse blows again
after replacement, hand over the unit to qualified service personnel.
User Manual: PSM2420
4+2 Channel Stereo Rack Mixer
V2.00 (05-2014) © Hill Audio
3
6. Carry this product with greatest care. Punches, big forces and
heavy vibration may damage this product mechanically.
7. The manufacturer takes no responsibility for injury or damage
caused by not following the safety precautions and instructions
printed in this manual.
Protection from electric shock:
1. Only connect this unit to a mains socket outlet with protective earth
connection, ground-fault (earth-fault) protection and overload
protection.
2. Where the mains plug or an appliance coupler is used as a dis-
connect device, the disconnect device shall remain readily
operable.
3. To pull the AC Cord out of the wall outlet or the unit’s AC socket,
never pull the cable itself, but only the AC plug.
4. Disconnect the unit from AC supply by pulling the AC plug out of
the wall outlet or the unit’s AC socket before any kind of cleaning
on the product. Use smooth and dry cloth only for cleaning. Check
all connection cables before reconnecting the unit.
5. Do not expose this unit to any dripping or splashing liquids, and do
not place objects filled with liquids, such as vases, on the unit. Do
not operate this unit near to open water or in high humidity.
6. Choose the position of the AC cord according to the lowest risk of
damage by foot steps or by squeezing it. Take especially care of
the AC cord outlet on the unit as well as the AC plug and wall outlet
at the other end of the cable.
7. Do not open the unit for service purpose, as there are no user-
serviceable parts inside. Warranty will be void in any case of
unauthorized service by the user or other not authorized persons.
Protection from fire:
1. Take care of not placing the unit near sources of heat (e.g.
powerful amplifiers, fog machines).
2. Take always care of sufficient air convection in the unit’s
environment to avoid overheating, especially when mounting in a
closed environment. Make sure air convection slots – if any - are
not blocked. Do not operate this unit in environmental temperatures
exceeding 40 degrees Celsius.
3. Check the total maximum power of your AC wall outlet if you
connect several units to one wall outlet and avoid any overloading.
Protection from injury and damage:
1. Never use any accessories or modifications not authorized by the
manufacturer of this unit.
2. Choose a location for operation where the unit is protected from
vibration and where a fixed mounting position is provided.