Bose amplus supplement s7

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2 CONTENTS Electrostatic Discharge Sensitive (ESDS) Device Handling .................... 3 Supplement Description ........................ 3 Warranty Information .......................... 3 Theory of Operation .............................. 4 Equalizer Card Curve Diagrams ....................... 5 Figure 1. FreeSpace 360 ¨ Surface EQ Curve .....................5 Figure 2. FreeSpace 360 In-Ground Soft Ground EQ Curve .................5 Figure 3. FreeSpace 360 In-Ground Hard Ground EQ Curve .............5 Test Procedures ........................................ 6-7 Part List Notes ....................................... 8 FreeSpace 360 EQ Card Part List .......................... 9-10 Packing List, FreeSpace 360 EQ card (see Figure 4) ........................ 11 Figure 4. FreeSpace 360 EQ Card Packing View .....................11 Figure 5. FreeSpace 360 Equalizer Board Topside and Etch Layout Diagram .......12 Figure 6. FreeSpace 360 Equalizer Board SMD and Etch Layout Diagram ...............12 CAUTION: The FreeSpace 360 Equalizer Cards contain no user serviceable parts. To prevent warranty infractions, refer servicing to warranty service centers 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.

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3 (ESDS) DEVICE HANDLING ELECTROSTATIC DISCHARGE SENSITIVE This unit contains ESDS devices. We recommend the following precautions when repairing, replacing, or transporting ESDS devices: ¥ Perform work at an electrically grounded work station. ¥ Wear wrist straps that connect to the station or heel straps that connect to conductive floor mats. ¥ Avoid touching the leads or contacts of ESDS devices or PC boards even if properly grounded. Handle boards by the edges only. ¥ Transport or store ESDS devices in ESD protective bags, bins, or totes. Do not insert unprotected devices into materials such as plastic, polystyrene foam, clear plastic bags, bubble wrap, or plastic trays. SUPPLEMENT DESCRIPTION This supplement should be used along with the 1800V EQ PCB service manual part number 181812-S2. The disassembly/assembly procedures, and packing part list should be used along with the information in this manual. The test procedures were included in this manual for your convenience. WARRANTY INFORMATION The FreeSpace ¨ Model 360 Loudspeaker Equalizer Cards are covered by a 5-year transferable limited warranty.