CHAPTER 5 TROUBLESHOOTINGCOPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001 5-54) Touch OK.Touch OK, and the optic system startsscanning. Automatic adjustment iscompleted in about 30 seconds, with“OK” appearing on the display.If the automatic adjustmentfails, clean the DADF platenroller and the document glasssurface of the host and retry theautomatic adjustment. If it stillfails, try the following manualadjustment procedure:b. Manual adjustment1) Turn on the power to the host to invokeservice mode.2) Press , 2 and 8 concurrently, andthen to invoke service mode.3) Starting from the service mode screen,touch the following screens in this or-der:COPIER > ADJUST > AD-XY > STRT-POSThe default adjustment value is 30.4) Find out the optimal value by tryingvarious possible values to verify the re-sultant images.