COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 11TROUBLESHOOTINGI. MAINTENANCE ANDINSPECTION ............................ 11-3A. Image Adjustment BasicProcedure ........................... 11-3B. Points to Note forServicing ............................ 11-4II. STANDARDS ANDADJUSTMENTS ....................... 11-5A. Mechanical ......................... 11-5B. ADF .................................. 11-30C. Electrical ........................... 11-41III. TROUBLESHOOTING IMAGEFAULTS ................................... 11-52A. Making Initial Checks ....... 11-52B. Sample Image Faults ....... 11-56C. Troubleshooting ImageFaults ................................ 11-57IV. TROUBLESHOOTINGMALFUNCTIONS .................... 11-65A. TroubleshootingMalfunctions ..................... 11-65V. TROUBLESHOOTING FEEDINGPROBLEMS ............................ 11-77A. Copy Paper Jam ............... 11-77B. Faulty Feeding .................. 11-80VI. ARRANGEMENT AND FUNCTIONSOF ELECTRICAL PARTS ....... 11-81A. Sensors and Solenoids .... 11-81B. Switches ........................... 11-82C. Lamp, Heater, Motor, Etc. 11-83D. PCBs ................................ 11-84E. ADF .................................. 11-85F. Variable Resistors (VR) andCheck Pins by PCB .......... 11-86VII. SERVICE MODE ..................... 11-88A. Outline .............................. 11-88B. Using Service Mode ......... 11-88C. Adjustment Mode (30) ...... 11-91D. Operation/InspectionMode (40) ......................... 11-92E. Machine SettingsMode (50) ......................... 11-93F. Counter Mode (60) ........... 11-93VIII. SELF DIAGNOSIS .................. 11-94
