My K2000 is a Calvin version and I am not sure if this is the same for the Janis boards. I used pin 14 of U60 for the 5 volt source. The red wire goes from a +5 volt source to the 3rd hole in the bottom row of where the EL transformer was removed. The black wire goes from the negative terminal of the large (22,000uf/16volt) electrolytic capacitor to the 3rd hole in the top row of where the EL transformer was removed. Turn over the audio circuit board and add 2 wires as shown above. Separate the audio circuit board from the front panel and desolder and remove the EL transformer and driver transistor Q25. Turn the K2000 over and reinstall the washer and nut on the shaft for the alpha wheel. Reinstall the 2 pieces of tape that hold the ribbon cables to the front panel circuit board. Reinstall the front panel circuit board using the 8 screws. Once the fit is correct mount the new display to the front panel with 4 screws. I needed to add 2 #6 flat washers between the display and the front panel at each screw location to move the display back for a proper fit. The face of the display bezel should be flush with the recessed lip that the display cover sits against. Test fit the new display in the front panel. Be careful to fit the connector into holes 1-20 on the display and to leave holes 21 and 22 empty. Solder this cable to the new display in the same orientation. Unsolder and reuse the ribbon cable or make up or buy a new cable with the same pin out and length. Solder the other yellow wire which goes to the 1st pin of the connector to hole A on the display. This wire will be soldered to hole K on the display. To insure the correct polarity mark the yellow wire which goes to the 3rd pin of the connector at each end with a black marker. The old EL back light cable is reused to power the LED back light. Next the wires must be transferred from the old to the new display. Once the display fits use a fine file to clean up the hole. Enlarge the hole with a coarse file and test fit the new display. Measure and mask off the enlarged hole with tape. The K2000 case is made of a soft plastic that is easily filed. The new display is slightly larger than the old display and the opening in the K2000 case that the display fits through must be enlarged by 3/32" (2.3mm) on each edge for the new display to fit. Turn the K2000 back over and remove the 8 screws that hold down the front panel circuit board. Remove the nut and washer from the control shaft. Turn the K2000 face up and remove the data entry knob (alpha wheel). Carefully press the display window out from the back. The display window is held in around the edges by double faced tape. Remove the 4 screws that hold down the old display and remove the old display. Remove and save the tape that holds the ribbon cables to the front panel circuit board. Remove the 2 boards and the aluminum plate under them.Ĭircuit Boards and Aluminum Plate Removed There may be other things to do if your keyboard has other options installed. Remove the 12 screws that hold the boards down. Unplug all of the connectors from the engine and audio boards. Now would be a good time to clean or completely remove the fan filter. Lift the back off and unplug the backup battery and if installed the fan and hard drive power connectors. Remove the battery cover and the 3 AAA cells. Remove the 6 screws that holds the bottom on the K2000. Not nice.īackup everything that you value before you start! Unplug the keyboard!Place your keyboard face down on a soft padded surface. You need to have bright lighting to read the old display. There is a PDF version of this web page that you can download.īack light is totally dead. It should for other configurations but there may be the odd additional step required. The display that I used in this conversion was obtained from John Ramsey This upgrade worked for me on a K2000 Calvin with only the sample option installed. The major challenge is doing the display swap is that the new LED display is slightly thicker and you will need to modify the K2000 front panel slightly to make the display fit properly. For about the same price as a new EL panel you can purchase a whole new display which has a blue LED back light which is brighter and will not fade out like an EL panel. While replacement EL panels are available they too will in time fade. Kurzweil K2000 Display UpgradeThe display in the Kurzweil K2000 uses an electroluminescent (EL) back light which fades out over time making the display very hard to read.
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