TM  1-1520-240-10            3-2-25 (3) Connect a fill devise to the KY-100 fill con- nector using a fill cable. Select the fill position containing the valid key and turn it on. (4) Press the INIT pushbutton (PUSH INIT). (5) The  KY-100  displays  KEY  1  01,  PASS, WORKING, LOCKED, READY. NOTE If a fill devise is not connected to the KY-100 when the INIT pushbutton is pressed, a dEV ERR  (Devise  Error)  message  will  be  dis- played. When this occurs, the only available communication mode will be PT (Plaintext). (6) If a FAIL message is displayed, notify the next level of maintenance. (7) To load additional keys (up to a total of 6), proceed to Key Loading Section. b.  Normal turn-on. (1) Set the front panel MODE control to the OF- FLINE position. (2) Rotate the DSPL and PNL switches clock- wise,  out  of  the  OFF  detent  positions  and  adjust  the display and panel lighting for comfortable viewing. (3) Set the PRESET switch to the MAN (manu- al)  position  to  apply  power  to  the  KY-100  electronics. Power -on tests will automatically be run when primary power is applied.- (4) Upon successful completion of the power- on tests, the test results should appear in the display. If PASS is displayed, continue with the turn-on procedures. However, if a FAIL message appears in the display, notify the next level of maintenance. If PUSH INIT is displayed, perform the cold start procedures as described above in paragraph a. 3-2-29.  Key Loading Procedures. Key  loading  may  be  accomplished  using  a  KYX-15, KYK-13 or a KOI-18. One Key Encryption Key (KEK), up to six Traffic Encryption Keys (TEKs), and one Emergen- cy Backup (EB) key can be loaded in the KY-100. A Fill Cable (ON190191) is required when using one of these devises. Proceed with the following generic Key Loading procedures: a.  Place the KY-100 MODE switch in OFFLINE posi- tion. b.  If the KY-100 is not on, turn PRESET switch to MAN position. c.  Connect a fill devise to the KY-100 fill connector. d.  Push the   (up arrow) or (right arrow) button until KEY OPS is displayed. e.  Push  the  INIT  button.  LOAD  KEY  will  be  dis- played. f.  Push the INIT button. LOAD N with a flashing N will be displayed. The flashing N indicates the currently se- lected key location. g.  Press the (up arrow) or (right arrow) button until the required location (1, 2, 3, 4, 5, 6, or U) is dis- played. h.  Press the INIT button. The entire LOAD N mes- sage will now be flashing. i.  Turn on fill devise and select key to be loaded. NOTE DO NOT press the INITIATE pushbutton (or pull tape through tape reader) on fill devise. j.  Press the INIT button. (When using a KOI-18 pull tape through tape reader at a steady rate after the termi- nal INIT button is pressed). Upon completion of a suc- cessful load, a pass tone will be heard and the display will momentarily indicate KEY N, where N is the key location loaded. k.  The display will again show LOAD N with N fla- shing. To load additional keys, repeat steps g. through j. until all desired key locations have been loaded. l.  Turn  off  and  disconnect  the  fill  devise  from  the KY-100. m.  Rotate MODE switch out of OFFLINE to exit Key Load. 3-2-30.  Zeroize Procedures. a.  Zeroize ALL keys. This procedure is active even if primary Power is removed from the KY-100. All key loca- tions within the KY-100 will be zeroized. Once zeroized, only PT voice communications are possible until a new Traffic Encryption Key (TEK) is loaded. (1) Pull the MODE switch and rotate it to the Z ALL position. All keys stored in locations 1–6 and U will be erased. (2) If the KY-100 is on when this procedure is performed, ZEROIZED will be displayed, and a tone will be heard. (3) If the KY-100 power is on when the MODE switch is rotated out of Z ALL position, PUSH INIT will be displayed. Follow the COLD START procedures. b.  Zeroize SPECIFIC key locations. (1) Place the KY-100 MODE switch to the OF- FLINE position. (2) If the KY-100 is not on, turn PRESET switch to MAN position. (3) Push  the    (up  arrow)  or    (right  arrow) button until KEY OPS is displayed. (4) Push  the  INIT  button.  LOAD  KEY  will  be displayed. (5) Push  the    (up  arrow)  or    (right  arrow) button until ZERO is displayed.