Crestron CNAMPX-12/16X60 Professional Audio Amplifiers Service Guide
This document was prepared and written by the Technical Documentation department at: Crestron Electronics, Inc. 15 Volvo Drive Rockleigh, NJ 07647 1-888-CRESTRON All brand names, product names and trademarks are the property of their respective owners. ©2006 Crestron Electronics, Inc.
Crestron CNAMPX-12/16X60 Professional Audio Amplifiers Contents Professional Audio Amplifiers: CNAMPX-12/16X60 1 Service Guide Overview.......................................................................................1 General Safety Precautions ....................................................................1 Rack Mounting Precautions ...................................................................2 Electro-Static Discharge (ESD) Precautions ..........................................
Crestron CNAMPX-12/16X60 Professional Audio Amplifiers Professional Audio Amplifiers: CNAMPX-12/16X60 Service Guide Overview This guide provides service instructions for the CNAMPX-12X60 and CNAMPX16X60 Professional Audio Amplifiers. The amplifiers contain two-channel amplifier modules (six in the CNAMPX-12X60 and eight in the CNAMPX-16X60), a Crestron® remote control system (herein referred to as the Cresnet® system) interface card, and an AC power fuse that are field replaceable.
Professional Audio Amplifiers Crestron CNAMPX-12/16X60 Do not defeat the safety purpose of the polarized or ground-type plug. A polarized plug has two blades with one wider that the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong is provided for safety. When the provided plug does not fit into an outlet, consult an electrician for replacement of the obsolete outlet.
Crestron CNAMPX-12/16X60 Professional Audio Amplifiers CNAMPX-12/16X60 Rack Spacing ONE RACK SPACE POWER PROFESSIONAL AUDIO 12 CHANNEL CRESTRON AMPLIFIER 60 WATTS CNAMPX-12/16X60 ONE RACK SPACE NOTE: Reliable grounding of rack mounted equipment should be maintained. Particular attention should be given to supply connections other than direct connections to the branch circuit. (e.g., use of power strips).
Professional Audio Amplifiers Crestron CNAMPX-12/16X60 Fuse Holder Retainer Tab 4. Carefully push the fuse holder retainer tab upwards until the tab releases and remove the fuse holder. CAUTION: Refer to the table below. Use only the listed fuse for each corresponding CNAMPX model and version to replace a defective fuse. The fuse is available commercially but if a replacement fuse cannot be obtained, contact Crestron customer service.
Crestron CNAMPX-12/16X60 Professional Audio Amplifiers Internal Replacement Procedures Internal replacement procedures consist of Amplifier Module, Audio Output Relay Board Replacement (not contained in CNAMPX-12X60), Cresnet System Interface Card procedures, and In-Rush Surge Suppressor. Prior to performing any of these procedures, the Disconnect Unit and Cover Removal procedure must be performed.
Professional Audio Amplifiers 7. Crestron CNAMPX-12/16X60 Depending upon the particular installation, rack mounting ears may or may not be installed. Perform the appropriate step below. 7a. If rack mounting ears are NOT installed, continue to step 8 below. 7b. If rack mounting ears are installed, refer to the diagram below. Using the 1/8-inch hex wrench, remove the mounting ear screws and ears from the left and right sides of the CNAMPX-12/16X60. Mounting Ear Screws (Left-Side) 8.
Crestron CNAMPX-12/16X60 9. Professional Audio Amplifiers Refer to the diagram below. Using the 1/8-inch hex wrench, remove the four screws from the top-center of the cover. NOTE: The four screws at the top-center of the cover are 1/2-inch long. The remaining cover screws are 1/4-inch. When reinstalling the cover, these screws are NOT interchangeable. Top-Center Cover Screws 10. Refer to the diagram below. Using the 1/8-inch hex wrench, remove the three screws from the top-rear of the cover.
Professional Audio Amplifiers Crestron CNAMPX-12/16X60 Amplifier Module Replacement The tools required for amplifier module replacement in the CNAMPX-12/16X60 are a grounding strap (or grounded workstation), a #1 Phillips screwdriver, and 5/64inch and 5/32-inch hex wrenches. To replace an amplifier module, the defective module must be returned to Crestron and a replacement must be obtained from Crestron.
Crestron CNAMPX-12/16X60 Professional Audio Amplifiers Module Bottom Screws NOTE: For the CNAMPX-16X60, there is minimum clearance between the modules. When removing the module brace screws, do not allow the screws to fall between the modules. If screws fall between the modules, additional modules may have to be removed. 4. Position the unit bottom-side down onto the work surface. Refer to the diagram below (view is from overhead).
Professional Audio Amplifiers 5. Crestron CNAMPX-12/16X60 Access to modules of the CNAMPX-12X60 is slightly different than access to CNAMPX-16X60 modules. Perform the appropriate step below. 5a. To replace module #6 of the CNAMPX-12X60 or any module of the CNAMPX-16X60, continue to step 6 below. 5b. To replace a module other than module #6 of the CNAMPX12X60, proceed to step 8 on page 11. 6. Refer to the diagram below.
Crestron CNAMPX-12/16X60 8. Professional Audio Amplifiers Removal of the CNAMPX-12X60 modules is slightly different than removal of CNAMPX-16X60 modules. Perform the appropriate step below. 8a. For the CNAMPX-12X60, refer to the diagram below. By hand, detach the four connectors from the defective module and remove the module. 8b. For the CNAMPX-16X60, refer to the diagram below. By hand, detach the four connectors from module #8 (module #8 is nearest the interface board) and remove this module.
Professional Audio Amplifiers Crestron CNAMPX-12/16X60 10. Module replacement of the CNAMPX-12X60 and the CNAMPX16X60 are slightly different. Perform the appropriate step below. 10a. To replace module #6 of the CNAMPX-12X60 or any module of the CNAMPX-16X60, continue to step 11 below. 10b. To replace a module other than module #6 of the CNAMPX12X60, proceed to step 14 below. 11. Make sure that the card is outward of the vertical bracket and position the card to its mounting holes. 12.
Crestron CNAMPX-12/16X60 Professional Audio Amplifiers WARNING: The CNAMPX-12/16X60 amplifiers are heavy units. The CNAMPX12X60 weighs approximately 81.40 lbs (37.00 kg) and the CNAMPX-16X60 weighs approximately 90.20 lbs (41.00 kg). Use more than one person to remove unit from or install unit into rack. CAUTION: The CNAMPX-12/16X60 Cresnet system interface card contains ESD sensitive devices.
Professional Audio Amplifiers 3. Crestron CNAMPX-12/16X60 Refer to the diagram below. Using a #1 Phillips screwdriver, remove the screw that secures the card to the vertical bracket. Cresnet System Interface Card Vertical Bracket Screw 4. Refer to the diagram below. Holding the card by hand and using a 5/64inch hex wrench, remove the two screws that secure the card to the rear panel and remove the card.
Crestron CNAMPX-12/16X60 Professional Audio Amplifiers 8. Re-connect all connectors (one for the CNAMPX-12X60, six for the CNAMPX-16X60) to the card. 9. Perform the appropriate step below. 9a. If performing another internal replacement procedure, proceed to that procedure. 9b. If NOT performing another internal replacement procedure, perform the “Cover Installation and Reconnect Unit” procedure on page 16.
Professional Audio Amplifiers Crestron CNAMPX-12/16X60 Installation of In-Rush Surge Suppressor 8. Tighten the two screws snug – do not over-tighten. Apply Three Bond 1401C (or similar thread sealer) to the nuts to prevent loosening. 9. Verify that the thermistor is not in contact with any components to allow for ambient air movement around it. CAUTION: The thermistor becomes hot during normal operation. Therefore, component damage may occur if components are touching the hot thermistor. 10.
Crestron CNAMPX-12/16X60 Professional Audio Amplifiers CAUTION: To prevent stripping of screw heads, threads, or mounting holes, do NOT overtighten screws. Tighten only to the specification listed in the individual step(s). NOTE: The unit shown in this procedure is a CNAMPX-16X60. The procedure is identical for all models and all versions except where noted. 1. Orient and position the cover onto the CNAMPX-12/16X60.
Professional Audio Amplifiers Crestron CNAMPX-12/16X60 Top-Center Cover Screws 5. Re-install all remaining cover screws to finger-tight then, using the 1/8-inch hex wrench, tighten all cover screws an additional 1/8-turn. 6. Perform the appropriate step below. 6a. If the CNAMPX-12/16X60 is NOT to be installed into an equipment rack, proceed to step 9 below. 6b.
Crestron CNAMPX-12/16X60 7. Professional Audio Amplifiers Orient and position the right-side mounting ear and re-install the three rack mounting ear screws to finger-tight then, using the 1/8-inch hex wrench, tighten the screws an additional 1/8-turn. WARNING: Observe the “Rack Mounting Precautions” on page 2 to install unit into equipment rack. WARNING: The CNAMPX-12/16X60 amplifiers are heavy units. The CNAMPX12X60 weighs approximately 81.40 lbs (37.00 kg) and the CNAMPX-16X60 weighs approximately 90.
Professional Audio Amplifiers Crestron CNAMPX-12/16X60 Problem Solving Further Inquiries If you cannot locate specific information or have questions after reviewing this guide, please take advantage of Crestron's award winning customer service team by calling the Crestron corporate headquarters at 1-888-CRESTRON [1-888-273-7876]. For assistance in your local time zone, refer to the Crestron website (http://www.crestron.com/) for a listing of Crestron worldwide offices.
Crestron CNAMPX-12/16X60 Professional Audio Amplifiers Return and Warranty Policies Merchandise Returns / Repair Service 1. No merchandise may be returned for credit, exchange, or service without prior authorization from CRESTRON. To obtain warranty service for CRESTRON products, contact an authorized CRESTRON dealer. Only authorized CRESTRON dealers may contact the factory and request an RMA (Return Merchandise Authorization) number.
Crestron Electronics, Inc. 15 Volvo Drive Rockleigh, NJ 07647 Tel: 888.CRESTRON Fax: 201.767.7576 www.crestron.com Service Guide – DOC. 5885B 06.06 Specifications subject to change without notice.
