Preface ................................................................................................................ii
READ THIS! .........................................................................................................ii
Warnings .............................................................................................................iii
Safety Suggestions ............................................................................................iv
Acknowledgments..............................................................................................vi
Table Of Contents...............................................................................................vii
List Of Figures ....................................................................................................ix
List Of Tables......................................................................................................ix
1.10 QS6............................................................................................................ 1
1.20 QS7............................................................................................................ 3
1.30 QS8............................................................................................................ 3
1.40 QSR ........................................................................................................... 5
2.10 Power Supplies .......................................................................................... 7
2.40 D-A............................................................................................................. 16
2.50 PC/MAC Serial I/O ..................................................................................... 17
3.00 Test Procedures..........................................................................................20
3.10 Self Tests................................................................................................... 20
Alesis QS Series Keyboards Service Manual V1.00
Table Of Contents
2.12A Transformer PCB ..................................................................................7
2.12B Main PCB..............................................................................................7
2.21 Main Outputs ........................................................................................... 7
2.24 Power Up Mute........................................................................................ 8
2.31A RESET..................................................................................................9
2.31D MIDI......................................................................................................10
2.32 The SG ASIC........................................................................................... 11
2.33 The FX ASIC ........................................................................................... 12
2.41 S6 D-A..................................................................................................... 16
2.42 QS7/QS8/QSR D-A ................................................................................. 17
2.51 QS Serial Input ........................................................................................ 18
2.52 QS Serial Output ..................................................................................... 18
2.53 PC/MAC Switch ....................................................................................... 18
2.53C QSR Variant .........................................................................................19
2.54 H8 UART Clocking .................................................................................. 19
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11/19/06