Bose ma12 loudspeaker service manual rev 01

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2 CAUTION: The Bose ® Panaray MA12 Modular Line Array Loudspeaker System contains no user-serviceable parts. To prevent warranty infractions, refer servicing to warranty service stations or factory service. PROPRIETARY INFORMATION THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF BOSE CORPORATION WHICH IS BEING FURNISHED ONLY FOR THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT BY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF THE BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED FOR ANY OTHER PURPOSE. The Bose Panaray MA12 Modular Line Array Loudspeaker System is covered by a limited 5-year transferable limited warranty. Warranty Contents Warranty ............................................................................................................................................. 2 Specifications .................................................................................................................................... 3 Product Description .......................................................................................................................... 3 Accessories Used with the MA12 Loudspeaker System ............................................................... 3 Part List Notes ................................................................................................................................... 3 Packaging Part List, Panaray ® MA12 Loudspeaker System (see Figure 1) ................................. 4 Figure 1. Panaray MA12 Loudspeaker Packaging View ..................................................................4 Main Part List, Panaray MA12 Loudspeaker System (see Figure 2) ............................................ 5 Figure 2. Panaray MA12 Loudspeaker System Exploded View .......................................................6 Part List, Panaray MA12 Loudspeaker Protection Circuit Board (see Figure 3) ......................... 7 Figure 3. MA12 Protection Circuit Board Layout Diagram ................................................................7 Figure 4. Panaray MA12 Loudspeaker Wiring Diagram ...................................................................8 Disassembly Procedures ................................................................................................................. 9 Test Procedures .............................................................................................................................. 10 Figure 5. Panaray MA12 Test Setup Diagram ................................................................................10 Service Manual Revision History ................................................................................................... 11

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3 Specifications External Dimensions: 38.5 x 4.2 x 5.1 in. (978 x 107 x 130 mm) Weight:Single Speaker: 22 lb. (10 kg) Packed System: 24 lb. (11 kg) Sensitivity: 88dB SPL, 120 Hz - 15 kHz (1W/1m free space) System Protection: PTC, lamp Impedance: 8 Ohms nominal, 7.5 Ohms minimum Power Handling: 300 Watts continuous per IEC-268-5, 120 Hz high pass, 96 hours. Recommended amplifier power 150-300 Watts Product Description The Bose ® Panaray ® MA12 Modular Line Array Loudspeaker System is a modular system used for mid/high frequency sound reproduction. It is a vented enclosure design using 12 full range drivers housed in a closely spaced line. The loudspeaker provides a means for mechanical attachment of two units to form a rigid single line source by using the CB-MA12 coupling bracket (see table below). Each loudspeaker has two Neutrik ® connectors and one barrier style terminal so that multiple units can be connected as a system in series and parallel. The Bose Panaray MA12 Loudspeaker can be used with the Bose Panaray MB4 Modular Bass Loudspeaker for dynamic full range reproduction. Description Product Code Black White WB-MA12 wall mount bracket (0º -“ 10º pitch) 028333 028334 WBP-MA12 wall mount bracket (0º -“ 10º pitch, +/- 90º yaw) 028673 028674 CB-MA12 coupling bracket 028337 028338 PSA-12 stand adapter 029229 - CVT-12 70V/100V transformer (non-RoHS complaint) 029388 029389 CVT-12 70V/100V transformer (RoHS complaint) 040190 040191 Accessories Used with the MA12 Loudspeaker System Part List Notes 1. This part is not normally available from Customer Service. Approval from the Field Service Manager is required before ordering. 2. The individual parts located on the PCBs are listed in the Electrical Part List. 3. This part is critical for safety purposes. Failure to use a substitute replacement with the same safety characteristics as the recommended replacement part might create shock, fire and/or other hazards. 4. This part is referenced for informational purposes only. It is not stocked as a repair part. Refer to the next higher assembly for a replacement part.