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Chapter 2
Diagnostics
Diagnostic Tests
The following lists the diagnostic tests available for the PC3x.
Note: Throughout this manual many references are made to the MARA 1 and MARA 2 ICs. For
service personnel unfamiliar with the PC3x, MARA is the name given to the two Kurzweil
Custom Sound ICs.
• SDRAM Refresh
• Flash Memory
• MARA Validity Check
• MARA Communications
• Exp DIMM Check
• MIDI UART
• External Card
• MARA Delay RAM
• MARA Sound ROM
• Audio Output
Warning: If possible, save all user programs and setups before entering diagnostics or
performing maintenance or repair. For instructions, refer to Saving User Data in Chapter 4,
page 4-2.
Entering Diagnostics
1. Apply power to the unit. When the ****Welcome to the Kurzweil PC3**** message appears in
the LCD, quickly press and release the Exit button. The LCD should display the following:
Figure 2-1 LCD example, Boot Loader
2. Press the soft button below RUN DIAGS in the LCD.
PC3 Boot Loader Version X.XX
RUN UPDATE RUN SYSTEM FILE
PC3 IMAGE DIAGS RESET UTILITIES
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