[GreenKeys] Did Teletype make a mistake?

w9ddd at tapr.org w9ddd at tapr.org
Fri Jan 1 21:37:02 EST 2021


I was trouble shooting why the margin lamp wasn't working after removing modifications made for customer (FAA?).

After starting at the wrong end, assuming I goofed the mod removal, I finally determined the problem was missing wires in the keyboard.  Wires from the switch go up to the terminal strip that also has the motor leads.  Wires between that terminal strip and the 20 pin connector were missing. 

Looked up the WD 4262 for the LK25.  Darn if it doesn't show margin switch wires there either, Intentional?  Maybe not.  It doesn't show wires from pins 12 & 13 to the motor leads either, but those are present in the keyboard.

Mentally an easy fix, physically not so much.  Won't be the official wire colors though.

John, W9DDD




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