Kurzweil sp5-8 Service Manual page 7

Bottom Enclosure .............................................................................................................................................4-13
Removing the Wheels Assembly ...........................................................................................................4-13
Replacing the Wheels Assembly ............................................................................................................4-14
Removing the Keyboard Assembly .......................................................................................................4-14
Replacing the Keyboard Assembly ........................................................................................................4-15
Removing Keys .........................................................................................................................................4-15
Replacing Keys .........................................................................................................................................4-17
Keyboard Contact PCBs ..........................................................................................................................4-18
Removing the Lo Contact PCB ........................................................................................................4-18
Replacing the Lo Contact PCB ........................................................................................................4-18
Removing the Mid Contact PCB .....................................................................................................4-19
Replacing the Mid Contact PCB......................................................................................................4-19
Removing the Hi Contact PCB ........................................................................................................4-20
Replacing the Hi Contact PCB ........................................................................................................4-20
Removing the Keyboard Contact Strips................................................................................................4-21
Replacing the Keyboard Contact Strips ................................................................................................4-21
Chapter 5 Troubleshooting & Maintenance
Introduction ........................................................................................................................................................5-1
Surface-Mount Devices .............................................................................................................................5-1
Cables, Connectors .....................................................................................................................................5-1
Boot Loader ........................................................................................................................................................5-2
Entering the Boot Loader .................................................................................................................................5-2
Resets ...................................................................................................................................................................5-2
Software Updates ..............................................................................................................................................5-3
Power Problems .................................................................................................................................................5-4
Dead: LCD, LEDs not lit ...........................................................................................................................5-4
Audio Problems .................................................................................................................................................5-4
No Audio .....................................................................................................................................................5-4
Front Panel Problems ........................................................................................................................................5-5
LCD not lit, LEDs are lit ............................................................................................................................5-5
LCD, LEDs not lit, buttons, or controllers not working .......................................................................5-5
Keyboard Problems ...........................................................................................................................................5-6
Dead Keyboard ...........................................................................................................................................5-6
Dead Note(s) or no velocity sensitivity ...................................................................................................5-6
One or More in a Section ....................................................................................................................5-6
Interconnect Diagram .......................................................................................................................................5-7
Chapter 6 Replacement Parts
Printed Circuit Boards and Assemblies ..................................................................................................6-1
Keyboard Assembly ...................................................................................................................................6-1
Right Front Panel PCB ...............................................................................................................................6-2
Left Front Panel PCB ..................................................................................................................................6-2
Miscellaneous ..............................................................................................................................................6-2
Table of Contents
vii