TM 1-1510-225-10 3D-5 4. Turn on the KLN 90B.  Press ENT  as required  to  approve  the  Self  Test  and Database  pages.    Use  the  left  outer knob  to  select  the  Setup  (SET)  type pages and the left inner knob to select the SET 0 page. NOTE In  steps  5,  6,  and  7,  repeated  presses  of CLR terminates the process and brings the display back to the original SET 0 page. 5. Press    the    left    CRSR.        UPDATE PUBLISHED DB will now be displayed. 6. Press   ENT.      The   database   region and  expiration  date  of  the  database presently  loaded  will  be  displayed.    If the  database  is  out  of  date,  the  word EXPIRES changes to EXPIRED. 7. Press ENT to acknowledge the information on this page and to continue  the  update  procedure.    The estimated    load    time    in    minutes    is displayed. 8. Press ENT to acknowledge the estimated load time and begin erasing the  existing  database.    The  unit  will display, ERASING DATABASE.  After the database has been erased, loading of the new database will begin automatically.      As   the   new   data   is loaded, the percentage of transfer will be displayed. 9. When disk 1 is complete, the screen will  display, "Insert Disk 2." Press any key  to  continue.    Remove  disk  1  and insert disk 2 and press any key on the computer.      The   load   operation   will continue.    If  the  database  has  three disks,  the  computer  will  prompt  when to insert disk 3. 10.   The   KLN   90B   will   ndicate  when  the database     update     is     complete     and display the expiration date.  You may turn  the  unit  off  at  this  time  or  press ENT to restart the KLN 90B. CAUTION Update of the database must be conducted on   the   ground.      The   KLN   90B   will   not perform navigation functions during updates.    An  update  of  database  requires 10 minutes.  The  accuracy  of  the  database  information is only assured if it is used before the end of the effective period. (a)   The   KLN   90B   contains   an   internal lithium  battery  that  is  used  to  retain  the  user-defined database as well as the flight plans. (b)   The     KLN     90B     was     designed     to provide worldwide navigation coverage from North 74^o latitude   to   South   60^o   latitude.      Outside   this   area, magnetic variation must be manually entered. 3D-3.  TURN-ON AND SELF-TEST. a.   Turn On.    Turn  on  the  KLN  90B  by  pressing the power/brightness knob to the IN position.  It takes a few seconds for the screen to warm up. b.  Self-Test.  The turn-on page will be displayed for  a  few  seconds.    During  this  time,  the  KLN  90B performs an extensive internal test.  When the internal test is complete, the Self-Test  page  will  automatically replace the Turn-On page.  Refer to Figure 3D-4. DATE/TIME   31 JUL 94 08:10:03CST ALT  1100FT BARO:29.92”   APPROVE? DIS  34.5NM OBS IN 242^o    OUT 315^o RMI    130^o ANNUN    ON E N R    -    L E G CRSR +    +    +    +    +        +    +    +    +    + Figure 3D-4.  Self-Test Page (1)   Adjust     the     display     brightness     to     the desired level by rotating the power/brightness knob. (2)   Verify  the  data  displayed  on  the  left  side of the self-test page is the same as is being displayed on   the   EHSI’s.      The   distance   field   always   displays 34.5 nautical  miles.    The  deviation  bar  on  the  EHSI should  be  indicating  a  half  scale  right  deviation.    The TO  / FROM indicator should be showing FROM.  The OBS  out  field  always  displays  315°.    If  the  EHSI  is capable  of  being  driven  by  the  KLN  90B,  the  course