Kurzweil K2600 Series, Service Manual

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K2600R Disassembly/Assembly
Opening the K2600R
3-5
5. Remove the Small Digital I/O Board.
Replacing the Small Digital I/O Board
1. Hold the board vertically over the DSP Board (Digital I/O XLR jacks facing down) and
connect the shielded wire cables at locations J1201 and J1205 on the Small Digital I/O
Board.
2. Lower the board and position it so that the Digital I/O jacks and Optical jack are aligned
properly with the openings provided for them in the rear panel.
3. Install the four screws that secure the Digital I/O Out and In jacks to the rear panel.
4. Install the cap on the Optical jack.
5. Follow the procedure on page 3-3 to replace the Audio Board.
Removing the DSP Board
You must remove the Audio Board before removing the DSP Board. Follow the procedure on
page 3-3 to remove the Audio Board. If the K2600R you are servicing has a Small Digital I/O or
Digital I/O Option Board installed, remove it before removing the DSP Board. Follow the
procedure on page 3-4 to remove the Small Digital I/O Board or page 3-3 to remove the Digital
I/O Option Board.
The DSP Board is mounted on the CPU Board and is held in place by four nylon PC board
standoffs and two 50-pin connectors.
1. Several cables are routed over the DSP Board. It is not necessary to disconnect all the
cables. However to make the removal of the DSP Board easier, we recommend
disconnecting two
fl at ribbon cables, as described in Steps 2 and 3.
2. On the CPU Board, remove the locking cable clip and disconnect the cable that connects
the LCD Board to the CPU Board.
3. On the Sampling Board, remove the locking cable clip and disconnect the cable that
connects the CPU Board to the Sampling Board.
4. After disconnecting the two fl at ribbon cables, fold them back, away from the DSP Board.
5. There are two styles of nylon standoffs securing the DSP Board. The standoffs on the right
side of the DSP Board (as viewed standing at the rear panel) have tabs that clip over the
top edge of the DSP Board. The standoffs on the left side of the DSP Board protrude
through the DSP Board.
6. Start with the standoffs on the right of the DSP Board. Press the tabs of the standoffs away
from the DSP Board and slightly lift the right edge of the DSP Board to clear the tabs.
Ref. Name Cable Type Destination
J1201 Sampling Bd. (SOB) shielded wire Sampling Board
J1205 Sampling Bd. (SOB) shielded wire Sampling Board
Table 3-3 K2600R Small Digital I/O Board cables