One of our users (Michael Kirk) found this bright LED backlit display that will work in the K1000 keyboard and perhaps the modules as well. With a little care and work, this display drops right in the keyboard and unlike the EL backlit displays will not fade over time. If you put one of these into a module, be sure to let us know if there are any major differences in the process.
NOTE: Here are three displays that will probably work if you cannot find the PICVUE display. These do not have the right angle connector. These have not been tested with the Kurzweil 1000 units as of Jan, 2013.
Vishay/Dale LCD-016N002DYYHET0000 (13.2mm height) ~$10.00 The YYHET0000 is an option code for color etc. This one is yellow/green (See vishay website for details). mouser.com may have it.
Driving the LED: The LED backlight requires a circuit that will provide the correct current (depending on the product) Each product specifies the typical current required (100ma to 200ma) and the typical voltage at that current. (3.7 to 4.2). Michael's solution was to drop 11 volts from the power supply with a regulator to 5 volts (about a watt of heat), then drop the 5 volt (thus limit the current) from his regulator using a diode. Here is a simple solution (not ideal either). Just connect a 1/4 watt resistor from the 5 volt supply to the LED + connector. ( + 5 volts is on pin 1 or 14 of the display, Ground is on pin 2 or 13. Different vendors label the pins differently so check the data sheet). The value of the resistor (R) depends on the display you use. R= (5.0 - LED voltage)/(LED current). Example: If the data sheet says the LED requires 150ma at 4.2 volts then the resistor must drop .8 volts (5.0 - 4.2). R= .8/.15 = 5.33 ohms. Using 10 ohms would limit the current but might not be bright enough. Calculate the resistor for your display then experiment with the value to use. DO NOT connect 5 volts directly to the LED. If anyone uses any of the above displays, let us know how it goes and what value of resistor you used. For some other pictures and another way to drive the LED see the K1000 users group forum message dated Jan 27, 2010 - topic 1000 series lockups and updated display.
Michael's overall process and discussion (modify as needed if you use one of the above displays):
I found this on the Jameco web site ( www.jameco.com ):
Jameco Part 365982 PICVUE PVC160206QYL04 $11.95
It is almost identical to the original Seiko M1632 display
in terms of
dimensions, voltage, input signals, signal timing, and display commands
except for the following:
The result: New LCD display with bright LED back light for the K1000!
LCD display from Jameco 365982 (PICVUE PVC160206QYL04)
Step by step and lots of pictures: (Note: the pictures open in a new window by default so you can put them all up at once if you want. Some browsers will let you right click on the picture link and open in a new tab.)
Remove the old display and disconnect the purple wires. See details in the other display repair pages if you need help removing the old display. Be sure to unplug your keyboard before you start. The power to the old EL (Electro luminescent) back light and will not be needed with the new display. Unsolder the purple wires from the old display EL back light, and unplug the connector from the the circuit board. You may want to save the wire and connector in case you ever want to go back to an EL backlit type display.
Prepare the new display assembly: Refer to the pictures and the process provided by Michael (above).
-Solder a connector on the new display. Either remove the connector from the old display and solder it to the new display or solder on a new one.
-Mount the potentiometer to the display board. 10K pot to pins 12 (wiper), 13 (gnd) and 14 (+5V)
Mount the 5 volt regulator (with its capacitors and diode, heat sink etc)
Various pictures of the completed display board
Connect the LED 5 volt regulator to the K1000 Power supply:
Mount the new display to the circuit board: