COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON)xCHAPTER 7 EXTERNALS/AUXILIARY MECHANISMSI. CONTROL PANEL .............................7-1A. Outline ...........................................7-1B. Operation.......................................7-11. Data Communication................7-12. LCD Processing .......................7-23. Automatic Control of LCDContrast ....................................7-44. Touch Switch Inputs .................7-5II. FANS ..................................................7-6III. POWER SUPPLY ...............................7-9A. Outline of Power Supply................7-9B. Power Supply Circuit .....................7-10C. Date/Time Display Power Supply..7-12IV. DISASSEMBLY AND ASSEMBLY......7-13A. External Covers .............................7-141. Removing the Front Door.........7-152. Removing the Inside UpperCover ........................................7-163. Removing the Fixing/FeedingUnit Front Cover .......................7-174. Removing the Rear Cover........7-175. Sliding Out the HopperAssembly ..................................7-186. Removing the Process Unit......7-187. Installing the Process Unit........7-21B. Control Panel.................................7-221. Removing the Control Panelfrom the Copier ........................7-222. Removing the Control PanelPCB ..........................................7-253. Removing the Touch Panel ......7-264. Removing the Control PanelController (CPU) PCB ..............7-27C. Door Switch Assembly ..................7-281. Removing the Front DoorSwitch Assembly ......................7-282. Removing the MultifeederDoor Switch Assembly .............7-283. Installing the Drum HeaterSwitch .......................................7-29D. Fan Unit .........................................7-301. Removing the ScannerCooling Fan ..............................7-302. Removing the Exhaust Fan......7-303. Removing the Fixing HeatExhaust Fan .............................7-31E. Reciprocating Mechanism forthe Upper Separation Claw ...........6-11F. SSR Error Detection Circuit forthe Fixing Heater ...........................6-12G. Locking Operation (fixing/feedingunit)................................................6-14H. Error Detection Circuit ...................6-151. Outline ......................................6-152. Scanning Lamp ErrorActivation Detection Circuit ......6-153. Fixing Heater Error ActivationDetection Circuit .......................6-164. Motor Error RotationDetection Circuit .......................6-17II. DISASSEMBLY AND ASSEMBLY......6-18A. Fixing Assembly ............................6-191. Construction .............................6-192. Locking Mechanism..................6-193. Removing the Fixing CleaningBelt ...........................................6-204. Installing the Fixing CleaningBelt ...........................................6-225. Removing the Upper FixingUnit ...........................................6-236. Removing the Fixing Heater.....6-257. Installing the Fixing Heater.......6-278. Removing the Fixing UpperRoller ........................................6-279. Installing the Upper FixingRoller ........................................6-2910.Removing the Thermal Switch..6-3011.Removing the Main Thermistor(TH1) ........................................6-3012.Removing the LowerSeparation Claw Assembly ......6-3113.Removing the Lower Roller......6-3214.Removing the UpperSeparation Claw .......................6-3215.Adjusting the Nip (tighteningthe pressure adjusting nut).......6-3316.Adjusting the Fixing Clutch.......6-3417.Removing the Sub Thermistor(TH2) ........................................6-35B. Delivery Assembly .........................6-361. Construction .............................6-362. Removing the Delivery UpperGuide (fixing/deliveryassembly) .................................6-363. Removing the Fixing/FeedingAssembly Locking Assembly....6-374. Removing the ExternalDelivery Roller ..........................6-375. Removing the External DeliveryPaper Sensor and the InternalDelivery Paper Sensor .............6-396. Removing the Fixing AssemblyOutlet Paper SensorAssembly ..................................6-397. Removing the Internal DeliveryAssembly Roller .......................6-40
