Alesis QS Series Manuals

Alesis QS Series Manuals

Manuals and User Guides for Alesis QS Series. We have 1 Alesis QS Series manual available for free PDF download: Service Manual

Alesis QS Series Service Manual

Alesis QS Series Service Manual (97 pages)

QS Series 64 voice keyboards and rack mount synths

Brand: Alesis | Category: Synthesizer | Size: 1.45 MB

Table of Contents

Read this

2
Warnings

3
Safety Suggestions

4
General Troubleshooting

5
Acknowledgments

6
- Table of Contents
  7
1 General Descriptions

10
- Qs6
  10
- Figure 1 - QS6 Simplified Block Diagram
  11
- Qs7
  12
- Qs8
  12
- Figure 2 - QS7/QS8 Simplified Block Diagram
  13
- Qsr
  14
- Figure 3 - QSR Simplified Block Diagram
  15
2 Theory of Operation

16
- Power Supplies
  16
  - QS6/QSR Power Supply
    16
  - QS7/QS8 Power Supply
    16
    
    A Transformer PCB
    16
    
    B Main PCB
    16
  - SRAM Battery Backup
    16
- Analog Signal Paths
  16
  - Main Outputs
    16
  - Headphone Outputs
    17
  - QS7/QS8/QSR Aux Outputs
    17
  - Power up Mute
    17
- Digital Signal Paths
  17
  - H8/510 Microprocessor
    17
    
    A Reset
    18
    
    B the GAL and Memory Mapped I/O
    19
    
    C Other Processor I/O
    19
    
    D MIDI
    19
    
    E PC Serial Connector
    20
  - The SG ASIC
    20
    
    A Sound Generation
    20
    
    B ROM Card Connector
    21
  - The FX ASIC
    21
    
    A QS7/8/R Digital Optical I/O
    21
  - The KEYSCAN ASIC
    21
    
    A Reading Velocity
    22
    
    B QS8 Key Construction
    22
    
    Figure 4 - Keyboard Velocity Reponse
    22
    
    Figure 5 - QS8 Key Construction
    24
- D-A
  25
  - S6 D-A
    25
  - Qs7/Qs8/Qsr D-A
    26
- PC/MAC Serial I/O
  26
3 Test Procedures

29
- Self Tests
  29
- Further Testing
  31
  - Testing 48Khz
    31
  - Figure 8 - 48Khz Test
    31
4 Troubleshooting and Repair

32
5 Appendix A Pinout Diagrams

37
- Sg Asic
  37
- Fx Asic
  37
- Figure 15 - SG ASIC Pinout
  37
- Figure 16 - FX ASIC Pinout
  37
- Keyscan Asic
  38
- Micro Controller
  38
- Figure 17 - Keyscan ASIC Pinout
  38
- Figure 18 - H8 Processor Pinout
  38
- Sram
  39
- Eprom
  39
- Sound Rom
  39
- Figure 19 - FX SRAM Pinout
  39
- Figure 20 - EPROM Pinout
  39
- Figure 21- Sound ROM Pinout
  39
- Gal
  40
- Dac
  40
- Figure 22 - GAL Pinout
  40
- Figure 23 - DAC Pinout
  40
6 Appendix A Updates and Corrections

41
7 Appendix B Software Histories

48
- Qs6
  48
- Qs7/Qs8
  49
- Qsr
  49
8 Appendix C Sys-Ex Implementations

51
- S6 Sys-Ex
  51
- QS7/QS8//QSR Sys-Ex
  76
9 Appendix D Service Parts Lists

77
- QS6 Service Parts List
  77
- QS7 Service Parts List
  81
- QSR Service Parts List
  85
- QS8 Service Parts List
  88
10 Appendix E Dictionary of Selected Terms

92
11 Index

94
12 Schematics

97
- Table 14 - Schematic Set
  97

Advertisement

Advertisement

Related Products

Alesis Categories

Recording Equipment Drums Synthesizer Music Equipment Speakers

More Alesis Manuals

	
		OSZAR »