COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)viiiAPPENDIXCHAPTER 11 TROUBLESHOOTINGA. GENERAL TIMING CHART ........ A-1B. SIGNALS ANDABBREVIATIONS ....................... A-3C. GENERAL CIRCUIT DIAGRAM . A-5D. DC CONTROLLER CIRCUITDIAGRAM ................................... A-7E. ADF CONTROLLER CIRCUITDIAGRAM ................................. A-15F. COMPOSITE POWER SUPPLYCIRCUIT DIAGRAM .................. A-19G. CONTROL PANEL CIRCUITDIAGRAM ................................. A-29H. AE SENSOR CIRCUITDIAGRAM ................................. A-31I. SENSOR CIRCUITDIAGRAM ................................. A-32J. NOISE FILTER CIRCUITDIAGRAM ................................. A-33K. HIGH VOLTAGE CONTACT CIRCUITDIAGRAM ................................. A-34L. BLANK EXPOSURE (front) CIRCUITDIAGRAM ................................. A-35M. BLANK EXPOSURE (rear) CIRCUITDIAGRAM ................................. A-36N. PRE-EXPOSURE CIRCUITDIAGRAM ................................. A-37O. SPECIAL TOOLS ...................... A-38P. SOLVENTS/OILS ...................... A-39I. 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
