QSC Audio MX 1500a, MX2000a VII. Warranty Disclaimers, VIII. Technical Assistance & Service

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

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