Kurzweil CUP2, Service Manual

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Control Panel Problems
LED Display, LEDs not lit, Buttons, or Controllers not working
1. Run the Scanner DIAG tests. If the tests pass, the problem is likely the result of a setting
change. Perform a hard reset to the unit or refer to the CUP2 User's Manual .
2. Refer to the Interconnect Diagram.
3. Check all related cables. Disconnect and reseat the cables.
4. Check the solder connections at the connectors.
5. Check the ribbon cable from the Control Panel Board to the Interface Board.
6. Check the ribbon cable from the Interface Board, J1, to the Engine Board, J7.
7. Trace the signal path from the connectors on the Engine Board through the Interface Board.
8. Find and replace bad component(s) or order a board replacement.
Keyboard Problems
Dead Keyboard
1. Run the Scanner DIAG tests. If the tests pass, the problem is likely the result of a setting
change. Perform a hard reset to the unit or refer to the CUP2 User's Manual .
2. Check the  at ribbon cables connecting the Keyboard Bass and Treble Contact Boards to
the Interface Board, locations J4 and J5 respectively. Be certain that the cables are not loose
or damaged.
3. Disconnect and reseat the cables.
4. Check the  at ribbon cable connectors at location J1 on the Interface Board and J7 on the
Engine Board.
5. Trace the signal path.
6. Find and replace bad component(s) or order a board replacement.
Troubleshooting & Maintenance
Control Panel Problems
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