Table Of Contents - Bose Loewe Concertos Acoustimass 61247 Service Manual

Troubleshooting Procedures ................................................................................................... 44-57
Figure 28. 25 Pin to 9 Pin Serial Data Cable...................................................................................44
Figure 29. DSP PCB Test Point Locations Layout Diagram, Solder Side ........................................44
Figure 30. Scope Photo of Boot Prompt at J5 Pin 11......................................................................47
Figure 31. Codec to DSP, Digital Audio Signal Path ........................................................................56
Figure 32. Micro to DSPs ................................................................................................................56
Scope Photos ............................................................................................................................ 58-64
Figure 33. Codec (U100) Scope Photo, Un-mute Condition ...........................................................58
Figure 34. Codec (U100) Scope Photo, Mute Condition ................................................................. 59
Figure 35. Microcontroller (U202) Scope Photo, Power Up ............................................................60
Figure 36. SPDIF Signal at U100 pin 42 .........................................................................................61
Figure 37. Microcontroller 8 MHz clock at U202 pin 39 ...................................................................61
Figure 38. Codec 11.2896 MHz Clock ............................................................................................62
Figure 39. 40 MHz DSP clock .........................................................................................................62
Figure 40. 3.3V Switching Power Supply Signals............................................................................63
Figure 41. Power Up Condition at U202 Pin 25 ...............................................................................63
Figure 42. Transmit Frame Sync .....................................................................................................64
Figure 43. Serial Data Clock ...........................................................................................................64
Figure 44. Audio Data .....................................................................................................................64
Appendix .................................................................................................................................... 65-87
Computer Setup Procedure ..................................................................................................... 65-66
Figure 45. Test Setup Diagram ........................................................................................................68
Figure 46. Fault Circuits ..................................................................................................................69
Figure 47. DSP PCB and Amplifier PCB Interconnection Diagram .................................................70
Figure 48. DSP PCB Basic Block Diagram ..................................................................................... 71
Figure 49. DC Power Supplies Simplified Schematic Diagram .......................................................71
Figure 50. Protection Circuit Simplified Schematic Diagram ...........................................................72
Figure 51. Microcontroller U202 Basic Block Diagram ....................................................................73
Figure 52. Satellite Amplifier DC Offset Detector Simplified Schematic Diagram ...........................73
Figure 53. Analog Signal Path from Input Jacks to Codec Simplified Schematic Diagram .............74
Figure 54. Digital Signal Path from Input Jack to Codec Simplified Schematic Diagram ................74
Figure 55. Analog Signal Path from Codec to Satellite Simplified Schematic Diagram ...................75
Figure 56. Transformer Wiring Diagram .......................................................................................... 75
Figure 57. Digital Bass Module Overall Turn-on Circuit Schematic Diagram .................................. 76
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Figure 58. Lifestyle
Figure 59. Lifestyle ®
Figure 60. Lifestyle ®
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Figure 61. Lifestyle
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Figure 62. Lifestyle
Figure 63. Lifestyle ®
SPDIF ................................................................................................................................................80
TTL to RS232 Converter .................................................................................................................80
TAP Commands ......................................................................................................................... 80-81
Hex Notation ....................................................................................................................................82
Firmware CHECKSUMS ..................................................................................................................82
Diagnostic voltages available at the uC ADC ports .....................................................................83
Two digit hex to voltage conversion ........................................................................................ 83-86
Thermistor readings (TAP command "ad2") ........................................................................... 86-87
Table of Contents (continued)
12 and 25 Series II Overall Frequency Response Curve ...............................77
30 Series II Overall Frequency Response Curve ...........................................77
Series II Tone Control Frequency Response Curve .......................................78
Series II Film EQ Frequency Response Curve ..............................................78
Series II Dynamic EQ Frequency Response Curve .......................................79
Series II 240 Volt Bass Frequency Response Curve ......................................79
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