Keyboard Problems; Dead Keyboard - Kurzweil Mark Pro 2i Service Manual

Mark Pro TWOi
4. Disconnect and reseat the cables.
5. Check the solder connections at the connectors.
6. Check front panel ribbon cable(s).
7. Refer to the Scanner Board schematics and check U12, IC Scanner 38869, for signal activity.

Keyboard Problems

Dead Keyboard

1. Check the flat ribbon cables connecting the keyboard Bass and Treble Contact Boards to
the Scanner Board, locations J2 and J3. Be certain that the cables are not loose or damaged.
2. Disconnect and reseat the cables.
3. Refer to the Scanner Board schematics.
4. Check U12, IC Scanner 38869 on the Scanner Board for keyboard signals.
5. Trace signal path.
. Find and replace bad component(s) or order a board replacement. Dead Note(s)
One or More in a Section
1. Remove related contact board.
2. Check contact strip for dirt, damage or wearing. Clean dirty contacts with denatured
alcohol. Replace damaged or worn contact strip.
3. Install contact strip.
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