Thermal Warning; Thermal Shutdown; Dc Fault Protection; Input/Output Protection - powersoft M30D HDSP+ETH User Manual

11.4 Thermal warning

If the heat sink reaches a temperature of approximately 75°C,
the front panel red "TEMP" LED corresponding to the overheated
channel pair turns on to warn the user of a potentially dangerous
thermal event. Output power is reduced to prevent damages to
the output stage.
11.5

Thermal shutdown

If the heat sink temperature rises above 85°C, the thermal
sensing circuitry will mute each power section of each
compromised channel pair. Only after the heat sink has cooled
down to below 75°C the channel pair will automatically unmute
and the red "TEMP" LED will be turned off.
11.6

DC fault protection

In order to protect your speakers from mechanical damage
caused by a DC signal coming from the amplifier's output, a DC
detection circuit is placed between the amplifier's output stage
and power supply. If a DC signal or excessive subsonic energy
appears at a channel output an instantaneous protection circuit
will mute the compromised channel pair. The red "CLIP" LED will
turn on to signal that protective measures have been engaged.

11.7 Input/output protection

Interference protection is implemented in the M Series to limit
out of band noise carried by the input lines. Disturbing frequencies
can interact with the output stage, causing unpredictable amplifier
behavior. A filtering system is used to stop infrasonic and VHF
signals from entering the signal path.

12 User Maintenance

12.1

Cleaning

Before attempting to clean any part of the amplifier, first
disconnect the AC main source. Use a soft cloth and mild non-
abrasive solution to clean the faceplate and chassis.
WARNING! Never let any liquid reach the internal parts of
the amplifier.
12.2

Service

There are no user-serviceable parts in your amplifier. Refer
servicing to qualified technical personnel. In addition to having an
in-house service department, Powersoft supports a network of
authorized service centers. If your amplifier needs repair contact
your Powersoft dealer (or distributor). You can also contact the
Powersoft Technical Service department to obtain the location of
the nearest authorized service center.
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12.3

Dust Removal

In dusty environments, the front side air filters clog with dust
after prolonged use. The dust gathered in the filters will interfere
with cooling. You may use compressed air to remove the dust
from filters. To remove air filters please refer to the front panel
removal procedure (see Section 8.1). Air filter cleaning should be
scheduled according to the dust levels in the amplifier's operating
environment.

13 Warranty

13.1

Product warranty

Powersoft guarantees its manufactured products to be free from
defective components and factory workmanship for a period of 48
(forty eight) months, starting from the date of purchase printed on
Powersoft's (or any of its Authorized Dealer's) invoice to the end
customer. All warranty repairs and retrofits must be performed at
Powersoft facilities or at an Authorized Service Center at no cost
for the purchaser. Warranty exclusion: Powersoft's warranty does
not cover product malfunctioning or failure caused by: misuse,
abuse, repair work or alterations performed by non-authorized
personnel, incorrect connections, exposure to harsh weather
conditions, mechanical damages (including shipping accidents), and
normal wear and tear. Powersoft will perform warranty services
provided that the product is not damaged during transportation.
13.2

Return of Goods

Goods can be returned to Powersoft only after they have been
granted a Return Merchandise Authorization (RMA) number to be
attached to the external packaging. Powersoft (or its Authorized
Service Center) has the right to refuse any returned good without
a RMA number.
13.3

Repair or replacement

Powersoft reserves the right to repair or replace any defective
goods covered by product warranty at its sole discretion and as
it deems best.
13.4

Cost and responsibility of transport

The purchaser (or end user/customer) is solely responsible
for all transportation costs and risks associated with sending
warranty covered goods to Powersoft or its Authorized Service
Center. Powersoft will assume full responsibility and cover all costs
incurred to send the goods back to the purchaser (or end user/
customer).