6.- SERVICE AND TROUBLESHOOTING
6.1.- CONSTRUCTION AND REPAIR
D.A.S. amplifiers have been designed and built with the best
electronic components available for utmost reliability. The simple,
modular construction provides easy servicing.
6.2.- OBSERVATIONS
WARNING:
The topology used on models E-2 and E-4 does not
allow to take measurements at the output referenced to ground so
that, to take measurements at the amplifier's outputs, a differential
probe is required.
6.2.1.-
If the amplifier seems to have no mains supply, check the
fuse. If it is blown, replace it by another of exactly the same type.
(Fuse type for each model is indicated on the fuse itself as well as
printed on the AC PCB). If it blows again, return the amplifier for
inspection to the factory or to any authorised dealer.
6.2.2.-
If there are no signs of output signal, check connections. If
clip
LED is lit, check for a possible short-circuit in the speaker
cables.
6.2.3.
-On models E-2 and E-4, the SIGNAL LED indicated signal
presence, regardless of the INPUT LEVEL control, which can be
useful for troubleshooting.
6.2.4.
- On models E-8, E-12 and E-20, if DC current is detected at
the inputs, the amplifier will disconnect the output and the orange
SAFEGUARD
LED will indicate that the outputs have been
deactivated (no sound will be heard through the speaker system).
You can verify the existence of DC, by measuring the offset voltage
of the input source, or by disconnecting it from the amplifier, in
which case the orange LED will turn off.
6.2.5.
- With use, the grills on the front panel and on the fan may
accumulate dirt and dust. Be sure to keep them clean at all times to
assure proper fan cooling.
7.- WARRANTY
The warranty certificate is found in the carton box with every
amplifier. Read carefully and follow instructions in the event of a
malfunction. The warranty covers manufacturing defects, parts and
labour. This applies to units purchased inside Spain.*
D.A.S. cannot be responsible for improper use or installation.
Inadequate electrical current may also affect the amplifier's normal
operation. If this is the case, D.A.S. cannot be held responsible for
failures in both the amplifiers and the speaker systems connected
to them.
*Outside Spain, ask your local distributor for warranty details.
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HIGH PERFORMANCE POWER AMPLIFIERS
