Bose mb4 loudspeaker service manual rev 01

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2 CAUTION: The Bose ® Panaray MB4 Modular Bass 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 MB4 Modular Bass Loudspeaker System is covered by a limited 5-year transferable limited warranty. Warranty Contents IMPORTANT SAFETY NOTICE: Do not attempt to remove the inserts holding the bass module handle in place. These are held in place with a thread locking adhesive and ensure the integrity of the mounting system. Any attempt to disassemble these parts will void the warranty. For this reason the handle, end caps an inserts are not available as service parts. Warranty ............................................................................................................................................. 2 Specifications .................................................................................................................................... 3 Product Description .......................................................................................................................... 3 Part List Notes ................................................................................................................................... 3 Packaging Part List, Panaray® MB4 Bass Loudspeaker (see Figure 1) ...................................... 4 Figure 1. Panaray MB4 Bass Loudspeaker Packaging View ...........................................................4 Main Part List, Panaray MB4 Bass Loudspeaker System (see Figure 2) ..................................... 5 Figure 2. Panaray MB4 Bass Loudspeaker Exploded View .............................................................5 Disassembly Procedures ................................................................................................................. 6 Test Procedures ................................................................................................................................ 7 Figure 3. Panaray MB4 Test Setup Diagram ....................................................................................7 Part List, Panaray MB4 Bass Loudspeaker Protection Circuit Board (see Figure 3) ................. 8 Figure 4. MB4 Bass Loudspeaker Protection Board Layout .............................................................8 Figure 5. Panaray MB4 Bass Loudspeaker Wiring Diagram ............................................................9 Service Manual Revision History ................................................................................................... 10

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3 Specifications External Dimensions: 26.7 x 10.2 x 18.1 in. (677 x 260 x 459 mm) Weight:Single Speaker: 55 lb (25 kg) Packed System: 62 lb (28 kg) Sensitivity: 87 dB SPL, 40 - 300 Hz (1W, 1m free space) System Protection: PTC, Lamp Impedance: 8 Ohms nominal, 6.2 Ohms minimum Power Handling: 200 Watts continuous per IEC-268 for 96 hours Product Description The Bose ® Panaray ® MB4 Modular Bass Loudspeaker System is a modular, low frequency loudspeaker component that can be used in small, medium and large venues. It has a long-term power rating of 200W. It uses four 5.25 inch bass drivers and has a bandwidth that extends from 40 to 300 Hz. Its output, bandwidth and physical size makes it a useful unit quantity of bass for use in singles and in multiples as a building block for any professional system. The Bose Panaray MB4 Modular Bass Loudspeaker System has two standard colors: black and white. The Panaray MB4 Modlular Bass Loudspeaker can be installed using an accessory wall mount bracket. 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.