Table Of Contents - Bose FreeSpace 4400 Service Manual

CONTENTS
Safety Information .............................................................................................................................3
Warranty .............................................................................................................................................4
Product Description ..........................................................................................................................4
Specifications .............................................................................................................................. 5-10
Electrostatic Discharge Sensitive (ESDS) Device Handling ....................................................... 11
Part List Notes ................................................................................................................................. 11
Product Variations .......................................................................................................................... 11
Accessories .....................................................................................................................................12
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Packaging Part List, FreeSpace 4400 System ............................................................................13
Figure 1. FreeSpace 4400 System Packaging View .........................................................................13
Packaging Part List, Rack Ear / Connector Kit ............................................................................14
Figure 2. Rack Ear / Connector Kit Packaging View ........................................................................14
Main Part List, FreeSpace Model 4400 Amplifier ................................................................... 15-16
Figure 3. FreeSpace Model 4400 Business Music System Exploded View ......................................16
Electrical Part Lists ................................................................................................................... 17-59
Front Panel PCB Assembly ...................................................................................................... 17-18
Digital Signal Processor PCB Assembly ................................................................................ 19-33
Digital Signal Processor Flash Memory PCB Assembly .............................................................33
Mic Sense PCB Assembly ........................................................................................................ 34-38
Power Supply / Power Amplifier PCB Assembly .................................................................... 39-56
Power Amplifier Driver PCB Assembly ................................................................................... 57-59
Disassembly Procedures ......................................................................................................... 60-62
Test Procedure Setup .....................................................................................................................63
Test Procedures ........................................................................................................................ 64-67
Troubleshooting ........................................................................................................................ 68-75
Theory of Operation .................................................................................................................. 76-83
Microcontroller Code Update Procedure ......................................................................................84
Circuit Board Layout Diagrams ............................................................................................... 85-93
Figure 4. Mic Sense PCB Top Etch Board Layout Diagram ..............................................................85
Figure 5. Mic Sense PCB Bottom Etch Board Layout Diagram ........................................................85
Figure 6. Flash Memory PCB Top Etch Board Layout Diagram ........................................................ 85
Figure 7. Flash Memory PCB Bottom Etch Board Layout Diagram .................................................. 85
Figure 8. Wallplate Sense PCB Top Etch Board Layout Diagram ....................................................86
Figure 9. Wallplate Sense PCB Bottom Etch Board Layout Diagram ...............................................86
Figure 10. AC Power Selector PCB Top Etch Board Layout Diagram .............................................. 86
Figure 11. AC Power Selector PCB Bottom Etch Board Layout Diagram .........................................86
Figure 12. DSP PCB Top Etch Board Layout Diagram ..................................................................... 87
Figure 13. DSP PCB Bottom Etch Board Layout Diagram ...............................................................88
Figure 14. Front Panel PCB Top Etch Board Layout Diagram ..........................................................89
Figure 15. Front Panel PCB Bottom Etch Board Layout Diagram ....................................................89
Figure 16. TriPath Module PCB Top Etch Board Layout Diagram ....................................................89
Figure 17. TriPath Module PCB Bottom Etch Board Layout Diagram .............................................. 89
Figure 18. Amplifier Upper PCB Top Etch Board Layout Diagram .................................................... 90
Figure 19. Amplifier Upper PCB Bottom Etch Board Layout Diagram ..............................................91
Figure 20. Amplifier/Power Supply Lower PCB Top Etch Board Layout Diagram............................. 92
Figure 21. Amplifier/Power Supply Lower PCB Bottom Etch Board Layout Diagram .......................93
Integrated Circuit Diagrams ................................................................................................... 94-105
Service Manual Revision History .................................................................................................106
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