QSC Audio MX 1000a - Manuel (Page 13)

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output until it can be repaired, at which time the fuse
should be replaced also.
Temperature sensors on the channel heatsinks and the
power transformers are part of the thermal management
circuitry. On the MX 1000a, MX 1500a, and MX 2000a,
the temperature sensors govern whether the dual-speed
fan should run at low or high speed. Below 55˚ C, the fan
runs at low speed; above, it runs at high speed. At or
above 85˚ C, the channel mutes to go into thermal
protection.
On the MX 3000a, the thermal management circuitry
controls the variable-speed fan according to how much
cooling air flow is required. At and above 80˚ C, the
thermal limiting circuit reduces the audio signal by up to
15 dB. At 85˚ C, the channel mutes to go into thermal
protection.
VII. WARRANTY AND
DISCLAIMERS
DISCLAIMER
QSC Audio Products, Inc. is not liable for any damage to
speakers, amplifiers, or any other equipment that is
caused by negligence or improper installation and/or use
of the SPL-1.
PRODUCT WARRANTY
QSC Audio Products, Inc. guarantees the SPL-1 to be
free from defective material and/or workmanship for a
period of three years from date of sale, and will replace
defective parts and repair malfunctioning products under
this warranty when the defect occurs under normal
installation and use—provided the unit is returned to our
factory via prepaid transportation with proof of purchase
(sales receipt). This warranty provides that examination
of the returned product must disclose, in our judgment, a
manufacturing defect. This warranty does not extend to
any product which has been subject to misuse, neglect,
accident, improper installation, or where the date code
has been removed or defaced.
VIII. TECHNICAL ASSISTANCE
& SERVICE
Servicing your unit requires a trained technician capable
of performing the type of service you need. There are no
user serviceable components inside your unit and the
danger of electric shock exists. Additionally, some of the
components in your unit has QSC specific parts that
require QSC replacements. Comprehensive service
manuals for some models are available at QSC.
TECHNICAL ASSISTANCE
If you suspect that your [product] is defective, check your
system configuration and [product] settings to determine
the origin of the problem. In many cases, incorrect audio
interfacing, poor cabling, or other system level impair-
ments are the cause of problems in audio systems. For
technical assistance beyond the information given in this
manual, QSC Technical Services may be contacted.
FACTORY SERVICE
In the event that your [product] does need factory service,
you may reach QSC Technical Services for return in-
structions. A Return Authorization (RA) number must be
obtained from QSC Technical Services. QSC may not
account for products that are returned without a Return
Authorization number.
Product Return Guidelines
1. Pack the product well for protection during ship-
ment. QSC will provide the factory packaging free
of charge upon request.
2. Include a copy of the sales receipt, your name,
return address, phone number, and defect de-
scription with your return correspondence.
3. Call QSC Technical Services for a Return Autho-
rization number.
4. Mark the Return Authorization number on the
outside of the packaging.
5. Ship the product prepaid to QSC Audio Products.
We recommend United Parcel Service (UPS).
QSC TECHNICAL SERVICES
1675 MacArthur Blvd
Costa Mesa, CA 92626
Telephone: (800) 772-2834
(714) 957-7150
(714) 754-6175
Fax: (714) 754-6173
Bulletin Board: (714) 668-7567