Alesis QS Series User Manual

Alesis QS Series Keyboards Service Manual V1.00 11/19/06
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3.20 Further Testing ..........................................................................................22
3.21 Testing 48KHz......................................................................................... 22
4.00 Troubleshooting and Repair......................................................................23
4.10 QS6/QS7/QS8 Disassembly/Reassembly.................................................23
4.20 QSR Disassembly/Reassembly.................................................................25
4.30 Replacing A Whole Keyboard....................................................................25
4.40 Replacing Individual Keys..........................................................................25
4.51 Replacing QS6 And QS7 Keys................................................................ 26
4.52 Replacing QS8 Keys ............................................................................... 26
4.60 General Troubleshooting ...........................................................................27
5.00 Appendix A Pinout Diagrams.....................................................................28
5.10 SG ASIC.................................................................................................. 28
5.11 FX ASIC .................................................................................................. 28
5.12 KEYSCAN ASIC...................................................................................... 29
5.13 MICRO CONTROLLER........................................................................... 29
5.14 SRAM...................................................................................................... 30
5.15 EPROM ................................................................................................... 30
5.16 SOUND ROM.......................................................................................... 30
5.19 GAL ......................................................................................................... 31
5.20 DAC......................................................................................................... 31
6.00 Appendix A Updates And Corrections ......................................................32
6.10 QS6............................................................................................................32
6.11 QS6 Main Revision B .............................................................................. 32
6.12 QS6 Main Revision C.............................................................................. 33
6.13 QS6 Main Revision D.............................................................................. 33
6.14 QS6 Main Revision E .............................................................................. 33
6.15 QS6 Main Revision F .............................................................................. 34
6.20 QS7/8.........................................................................................................35
6.21 QS7/8 Main Revision B ........................................................................... 35
6.22 QS7/8 Main Revision C........................................................................... 36
6.23 QS7/8 Main Revision D........................................................................... 36
6.24 QS7/8 Main Revision E ........................................................................... 37
6.25 QS7/8 Main Revision F ........................................................................... 37
6.25 Changes To QS7/QS8 VCO Circuit (All Main PCB Revisions)................ 38
6.30 QSR...........................................................................................................38
7.00 Appendix B Software Histories .................................................................39
7.10 QS6............................................................................................................39
7.20 QS7/QS8 ...................................................................................................40
7.40 QSR...........................................................................................................40
8.00 Appendix C Sys-Ex Implementations........................................................42
8.10 S6 Sys-Ex..................................................................................................42
8.20 QS7/QS8//QSR Sys-Ex .............................................................................67
9.00 Appendix D Service Parts Lists.................................................................68
9.10 QS6 Service Parts List...............................................................................68
9.20 QS7 Service Parts List...............................................................................72
9.30 QSR Service Parts List..............................................................................76
9.40 QS8 Service Parts List...............................................................................79
10.00 Appendix E Dictionary Of Selected Terms..............................................83
11.00 INDEX ........................................................................................................85
12.00 Schematics................................................................................................88

Alesis QS Series Specifications

General

Multitimbral	16 parts
Oscillators	Sample-based
Effects	Reverb, Chorus, Delay, EQ, Distortion
Display	LCD
MIDI	In, Out, Thru
Memory	User Programs
Outputs	Stereo
Weight	11 kg