Bose built invisible ta 1 amplifier service manual
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1 CONTENTS 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. CAUTION: The Bose ® BUILT-INvisible ® TA-1 amplifier contains no user-serviceable parts. To prevent warranty infractions, refer servicing to warranty service stations or factory service. Safety Information ............................................................................................................................ 2 Electrostatic Discharge Sensitive (ESDS) Device Handling ......................................................... 2 Warranty ............................................................................................................................................. 2 Specifications .................................................................................................................................... 3 Speaker EQ Curves .......................................................................................................................... 4 Theory of Operation ................................................................................................................... 5-21 Disassembly/Assembly Procedures ....................................................................................... 21-22 Test Procedures ........................................................................................................................ 23-30 Part List Notes ................................................................................................................................. 31 Main Part List, Digital BUILT-INvisible ® Amplifier (see Figures 1, 2 and 3) ................................ 31 Figure 1. Input/Output PCB, DSP PCB and Chassis Exploded View .............................................32 Figure 2. Amplifier PCB Assembly with Heatsink Exploded View ..................................................33 Figure 3. Assembled Amplifier with Heatsink Open ........................................................................34 Electrical Part Lists ................................................................................................................... 35-55 I/O PCB Electrical Part List ...................................................................................................... 35-41 DSP PCB Electrical Part List ...................................................................................................42-48 Amplifier PCB Electrical Part List ........................................................................................... 49-55 Packaging Part List, Digital BUILT-INvisible System (see Figure 4) ........................................... 56 Figure 4. Digital BUILT-INvisible System Packaging View ..............................................................56 Integrated Circuit Diagrams ..................................................................................................... 57-61 Appendix .................................................................................................................................... 62-80 Accessories used with the TA-1 Amplifier .............................................................................. 62-63 CD-50 System Assembly Part List ................................................................................................63 BUILT-INvisible Series Bass Module ......................................................................................... 64 SE-1 Audio/Video Switcher ............................................................................................................ 65 Figure 5. SE-1 Audio/Video Switcher Packing Diagram .................................................................65 CI-1 Control Integrator ................................................................................................................... 66 Figure 6. CI-1 Control Integrator Packing Diagram .........................................................................66 Figure 7. TA-1 Amplifier Test Setup Diagram ...................................................................................67 Figure 8. TA-1 Amplifier Connection Diagram .................................................................................68 Table 1. Satellite Speaker EQ DIP Switch Settings ........................................................................71 Computer Setup Procedure ..................................................................................................... 72-73 Amplifier Firmware Upgrade Procedure ....................................................................................... 74 TA-1 Amplifier TAP Command Tables ..................................................................................... 75-78 System Troubleshooting Information ..................................................................................... 79-80 Figure 9. TS-200 System Connection Details .................................................................................81 Figure 10. TS-400 System Connection Details ...............................................................................82 Figure 11. TS-600 System Connection Details ...............................................................................83
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2 SAFETY INFORMATION ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICE HANDLING 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. The Bose ® BUILT-INvisible ® TA-1 Theater Amplifier is covered by a 1-year transferable limited warranty WARRANTY 1. Parts that have special safety characteristics are identified by the symbol on schematics or by special notes on the parts list. Use only replacement parts that have critical characteristics recommended by the manufacturer. 2. Make leakage current or resistance measurements to determine that exposed parts are acceptably insulated from the supply circuit before returning the unit to the customer. Use the following checks to perform these measurements: A. Leakage Current Hot Check-With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. Do not use an isolation transformer during this test. Use a leakage current tester or a metering system that complies with American National Standards Institute (ANSI) C101.1 "Leakage Current for Appliances" and Underwriters Laboratories (UL) 6500 / IEC 60056 paragraph 9.1.1. With the unit AC switch first in the ON position and then in OFF position, measure from a known earth ground (metal waterpipe, conduit, etc.) to all exposed metal parts of the unit (antennas, handle bracket, metal cabinet, screwheads, metallic overlays, control shafts, etc.), especially any exposed metal parts that offer an electrical return path to the chas- sis. Any current measured must not exceed 0.5 milliamp. Reverse the unit power cord plug in the outlet and repeat test. ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RE- TURNING THE UNIT TO THE CUSTOMER. B. Insulation Resistance Test Cold Check-(1) Unplug the power supply and connect a jumper wire between the two prongs of the plug. (2) Turn on the power switch of the unit. (3) Measure the resistance with an ohmmeter between the jumpered AC plug and each exposed metallic cabinet part on the unit. When testing 3 wire products, the resistance measured to the product enclosure should be between 2 and infinite MOhms. Also, the resistance measured to exposed input/output connectors should be between 4 and infinite MOhms. When testing 2 wire products, the resis- tance measured to exposed input/output connectors should be between 4 and infinite MOhms. If it is not within the limits specified, there is the possibility of a shock hazard, and the unit must be repaired and rechecked before it is returned to the customer.