Manufacturer Transitional Components
During the manufacturing of the Kurzweil K250 several improvements were made to the instrument. This section deals with typical updates and upgrades other than third-party additional components. For those who purchased the instrument later in the manufacturing run, expanded, improved and upgraded components as well as software updates were typically installed in the instrument (unless the instrument was older stock and was not upgraded for some reason). The following lists those components. For those who did not have a particular expanded, improved or upgraded component and/or software update and desired it, the item needed to be purchased and if necessary, installation charges were added, either by Kurzweil or by a third-party vendor. The following items are:
- Software ROM upgrades. From the very early instruments to software version 4.X, then software version 5.X, then software version 6.X. and lastly software version 7.X with version 7.3 being the last version produced in 1990. These upgrades offered improved hardware and software functionality, signal processing improvements, bug fixes, maintenance improvements, feature additions/enhancements and increased reliability.
- Hardware upgrades. The CGP (ROM) board was modified to allow additional ROM blocks and the processor board was modified for improved signal processing. The upgraded hardware was typically found in Kurzweil K250's manufactured in 1986 or later and was a highly recommended upgrade for older Kurzweil K250 units being upgraded to use version 5.X, 6.X or 7.X software.
- Power pod upgrades. Revised the type of power supply used and allowed for 110/220 volt AC selectable input.
- Front panel button slider and button design and shape.
- Front panel button labeling changes to match major software enhancements from software version 3.X to 4.X and later.
- Complete Parallel SCSI Type 1 implementation in versions 7.0 through 7.3. A 50-pin Narrow SCSI board was added above the CGP Processor Board. The K250 could then theoretically provide direct connectivity up to eight other SCSI devices (for example to connect directly to a hard drive without the need for a separate computer).
Today either the end user has to install components themselves or a third-party vendor will need to install components since Kurzweil Music Systems no longer provides service or support for this instrument series.
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