Kurzweil K2600 Series, Service Manual

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K2600/K2600X Disassembly/Assembly
Bottom Enclosure
4-17
5. Remove the four hex standoffs and fl at washers that secure the SCSI ports to the rear
panel.
6. Remove the screw that secures the CPU Board to the mounting post.
7. The three nylon PC board standoffs that secure the CPU Board have tabs that clip over the
top edge of the board. Press the tabs of the standoffs away from the CPU Board and lift the
board up to clear the tabs.
8. A moveable bracket also holds the CPU Board in position. (This bracket is secured by the
hardware that secures the enclosure support wall.) When the top enclosure is removed
from the unit, the moveable bracket is held in place with tape securing the bracket to the
bottom enclosure. This bracket can tilt away from the CPU Board.
9. Remove the CPU Board by moving it toward the keyboard until it clears the SCSI ports
and MIDI jacks.
Replacing the CPU Board
1. Place the CPU Board in position over the three nylon PC board standoffs. Be sure the
MIDI Select and SCSI Termination switches, SCSI ports, and MIDI jacks are correctly
positioned through the rear panel.
2. Press the CPU Board down to secure it onto the three standoffs.
3. Install the screw that secures the CPU Board to the mounting post.
4. Install the two screws that secure the MIDI jacks to the rear panel.
5. Install the four hex standoffs and fl at washers that secure the SCSI ports to the rear panel.
6. Be sure that the moveable bracket is in position and is secured to the bottom enclosure.
7. Connect the cables listed in Table 4-7.
8. Be sure to install the locking cable clips on all fl at ribbon cables.
9. Follow the instructions on page 4-16 to install the DSP Board.
Removing the Power Supply Board
1. Disconnect the cables listed in Table 4-8.
Ref. Name Cable Type Destination
J101 System Secondary stranded wire Transformer
J102 HDD Secondary stranded wire Transformer
J103 Fan Supply stranded wire Fan Assembly
J104 Backlight Supply stranded wire Backlight Power Board
J105 CPU DC Power stranded wire CPU Board
J106 HDD Supply stranded wire HDD
J107 Audio Power stranded wire Audio Board
J108 Scanner Power stranded wire Keyboard Scanner Board
Table 4-8 Power Supply cables