Bose Loewe Concertos Acoustimass 61247 User manual

230-90375.915

Troubleshooting Guide

Test Procedures

Scope Photos

Computer Setup Procedure

Concertos

Acoustimass ®

Bassmodul

Art.-Nr. 61247

SOUND BY

BOSE ®

Troubleshooting Guide Overview

This troubleshooting guide is divided into three sections. The section that you use will be

determined by the items available to you for use in troubleshooting. Section 1 allows for limited

troubleshooting due to limited availability of items. Section 3 is the most complete troubleshooting

section.

Section 1: Bass Box Only Procedures is to be used if you have a bass module to troubleshoot,

but no head unit or PC to turn the bass module on. It will ta e you through a troubleshooting

process which will allow you to power up the amplifier PCB by itself, as well as some troubleshoot-

ing procedures for the Digital Signal Processor PCB, should it be at fault.

Section 2: Bass Box with a Head Unit Procedures is to be used if you have a bass module and

a head unit, but no PC. In this section you will be able to connect an audio signal to the head unit

and turn the bass module on. This will allow you to signal trace and troubleshoot the amplifier PCB

and the Digital Signal Processor PCB.

Section : Computer Aided Troubleshooting Procedures is to be used if you have a PC

that can be used to communicate with the Digital Signal Processor PCB of the bass module,

and is the preferred method of troubleshooting. In this section you will be able to determine the

EQ curve of the module under test as well as put the module into different test modes for easier

troubleshooting.

There is an Appendix at the bac of this guide containing information such as simplified

schematic diagrams, bloc diagrams, frequency response curves, tables, and computer setup

information. See the table of contents for a complete listing.

Table of Contents

Troubleshooting Guide Overview ....................................................................................................1

Table of Contents .......................................................................................................................... 2-

Section 1, Bass Box Only Procedures....................................................................................... 4-21

Section 1 Contents............................................................................................................................4

Test Set-up Parameters and Equipment .........................................................................................5

Bass Box Only Troubleshooting Procedures..................................................................................5

Bass Box Only Test Procedures .................................................................................................. 6-7

Figure 1. Scope Photo of Boot Prompt at J5 Pin 11..........................................................................7

Amplifier PCB Hook-Up Procedures ......................................................................................... 8-11

Figure 2. Cable for Amplifier Output Connection at J701 ..................................................................8

Figure 3. Output Wire Connection View at J701 ...............................................................................8

Figure 4. Input Wire Connection View at J700 ..................................................................................9

Figure 5. Triac Jumping View on DSP PCB .....................................................................................10

Amplifier Test Procedures ..............................................................................................................12

DSP PCB Troubleshooting Procedures ................................................................................... 1 -19

Figure 6. Codec to DSP, Digital Audio Signal Path ..........................................................................17

Figure 7. Micro to/from DSPs..........................................................................................................17

Figure 8. DSP PCB Test Point Locations Layout Diagram, Solder Side ..........................................19

Scope Photos ............................................................................................................................ 20-21

Figure 9. Codec (U100) Scope Photo, Mute Condition ...................................................................20

Figure 10. Microcontroller (U202) Scope Photo, Power Up ............................................................21

Figure 11. Microcontroller 8 MHz cloc at U202 pin 39...................................................................21

Section 2, Bass Module with Head Unit Procedures.............................................................. 22-41

Section 2 Contents..........................................................................................................................22

Normal System Operation Description .........................................................................................2

Test Setup Procedures ...................................................................................................................24

Connection of Bass Module Using a CD-5/CD-20 Music Center.................................................24

Bass Box Troubleshooting Procedures................................................................................... 25-

Figure 12. Scope Photo of Boot Prompt at J5 Pin 11......................................................................26

Figure 13. Codec to DSP, Digital Audio Signal Path........................................................................ 2

Figure 14. Micro to/from DSPs ........................................................................................................ 2

DSP PCB Troubleshooting.............................................................................................................. 4

Figure 15. DSP PCB Test Point Locations Layout Diagram, Solder Side ........................................ 4

Scope Photos ............................................................................................................................ 5-41

Figure 16. Codec (U100) Scope Photo, Un-mute Condition ........................................................... 5

Figure 17. Codec (U100) Scope Photo, Mute Condition ................................................................. 6

Figure 18. Microcontroller (U202) Scope Photo, Power Up ............................................................ 7

Figure 19. SPDIF Signal at U100 pin 42 ......................................................................................... 8

Figure 20. Microcontroller 8 MHz cloc at U202 pin 39................................................................... 8

Figure 21. Codec 11.2896 MHz Cloc ............................................................................................ 9

Figure 22. 40 MHz DSP cloc ......................................................................................................... 9

Figure 23. 3.3V Switching Power Supply Signals............................................................................40

Figure 24. Power Up Condition at U202 Pin 25...............................................................................40

Figure 25. Transmit Frame Sync .....................................................................................................41

Figure 26. Serial Data Cloc ...........................................................................................................41

Figure 27. Audio Data .....................................................................................................................41

Section , Computer Aided Troubleshooting .......................................................................... 42-64

Section Contents..........................................................................................................................42

Test Setup Parameters and Equipment.........................................................................................4

Test Setup Procedure .....................................................................................................................4

Table of Contents (continued)

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 cloc at U202 pin 39...................................................................61

Figure 38. Codec 11.2896 MHz Cloc ............................................................................................62

Figure 39. 40 MHz DSP cloc .........................................................................................................62

Figure 40. 3.3V Switching Power Supply Signals............................................................................6

Figure 41. Power Up Condition at U202 Pin 25...............................................................................6

Figure 42. Transmit Frame Sync .....................................................................................................64

Figure 43. Serial Data Cloc ...........................................................................................................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 Bloc Diagram .....................................................................................71

Figure 49. DC Power Supplies Simplified Schematic Diagram .......................................................71

Figure 50. Protection Circuit Simplified Schematic Diagram ...........................................................72

Figure 51. Microcontroller U202 Basic Bloc Diagram ....................................................................7

Figure 52. Satellite Amplifier DC Offset Detector Simplified Schematic Diagram ...........................7

Figure 53. Analog Signal Path from Input Jac s to Codec Simplified Schematic Diagram .............74

Figure 54. Digital Signal Path from Input Jac 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

Figure 58. Lifestyle® 12 and 25 Series II Overall Frequency Response Curve ...............................77

Figure 59. Lifestyle® 30 Series II Overall Frequency Response Curve ...........................................77

Figure 60. Lifestyle® Series II Tone Control Frequency Response Curve .......................................78

Figure 61. Lifestyle® Series II Film EQ Frequency Response Curve ..............................................78

Figure 62. Lifestyle® Series II Dynamic EQ Frequency Response Curve .......................................79

Figure 63. Lifestyle® Series II 240 Volt Bass Frequency Response Curve......................................79

SPDIF................................................................................................................................................80

TTL to RS2 2 Converter .................................................................................................................80

TAP Commands ......................................................................................................................... 80-81

Hex Notation ....................................................................................................................................82

Firmware CHECKSUMS ..................................................................................................................82

Diagnostic voltages available at the uC ADC ports .....................................................................8

Two digit hex to voltage conversion ........................................................................................ 8 -86

Thermistor readings (TAP command “ad2”) ........................................................................... 86-87

Section 1

Bass Box Only Procedures

Section 1 Contents