Kurzweil PC3x Service Manual
i
Chapter 1
Introduction
Notes, Cautions, Warnings ............................................................................................................................................ 1-1
Rear Panel Features......................................................................................................................................................... 1-1
PC3x Front Panel ............................................................................................................................................................. 1-3
Front Panel Features ................................................................................................................................................ 1-3
Wheels Assembly (not shown)........................................................................................................................ 1-5
Chapter 2
Diagnostics
Diagnostic Tests ............................................................................................................................................................... 2-1
Entering Diagnostics....................................................................................................................................................... 2-1
LCD and Front Panel Buttons ................................................................................................................................ 2-2
Test Results................................................................................................................................................................ 2-2
Diagnostic Test Modes.................................................................................................................................................... 2-3
Run ............................................................................................................................................................................. 2-3
Loop ........................................................................................................................................................................... 2-3
Continuous................................................................................................................................................................ 2-3
Burn-in loop .............................................................................................................................................................. 2-3
Description of Tests......................................................................................................................................................... 2-4
SDRAM Refresh ....................................................................................................................................................... 2-4
Flash Memory........................................................................................................................................................... 2-4
MARA Validity Check ............................................................................................................................................. 2-4
MARA Communications......................................................................................................................................... 2-4
Expansion DIMM Check......................................................................................................................................... 2-5
MIDI UART............................................................................................................................................................... 2-5
External Card............................................................................................................................................................ 2-6
MARA Delay RAM .................................................................................................................................................. 2-6
MARA Sound ROM ................................................................................................................................................. 2-6
Audio Output ........................................................................................................................................................... 2-7
Diagnostic Version 0.20 or earlier ................................................................................................................... 2-7
Sine Wave Test ................................................................................................................................................... 2-8
Chapter 3
Disassembly/Assembly
Introduction ..................................................................................................................................................................... 3-1
Notes, Cautions, Warnings ..................................................................................................................................... 3-1
Cables, Connectors................................................................................................................................................... 3-1
Cables ................................................................................................................................................................. 3-1
Cable Routing.................................................................................................................................................... 3-1
Required Tools and Materials................................................................................................................................. 3-1
Opening the PC3x ........................................................................................................................................................... 3-2
PC3x Bottom ............................................................................................................................................................. 3-2
Removing the Top Enclosure.................................................................................................................................. 3-3
Replacing the Top Enclosure .................................................................................................................................. 3-5
Closing the PC3x ...................................................................................................................................................... 3-6
Top Enclosure................................................................................................................................................................... 3-7
Removing the Enclosure Support Wall................................................................................................................. 3-8
Replacing the Enclosure Support Wall.................................................................................................................. 3-8
Removing the Connector Board............................................................................................................................. 3-9
Replacing the Connector Board ........................................................................................................................... 3-10
Removing the Slider Board....................................................................................................................................3-11
Replacing the Slider Board ................................................................................................................................... 3-12
