Canon NP6251 Service Manual Manual pdf 242 page image
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Canon NP6251 Service Manual

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Contents
  1. system configuration
  2. Table Of Contents
  3. Table Of Contents
  4. Table Of Contents
  5. Table Of Contents
  6. Table Of Contents
  7. Table Of Contents
  8. Table Of Contents
  9. Table Of Contents
  10. Table Of Contents
  11. I. FEATURES
  12. II. SPECIFICATIONS
  13. Performance
  14. Others
  15. B. Paper Deck-A1
  16. III. NAMES OF PARTS
  17. B. Cross Section
  18. IV. OPERATING THE MACHINE
  19. B. Extended Modes
  20. C. User Mode
  21. V. ROUTINE MAINTENANCE BY THE USER
  22. VII. IMAGE FORMATION
  23. basic operation
  24. Holding Tray Feeding
  25. B. Outline of the Electrical Circuitry
  26. C. Basic Sequence of Operations
  27. Basic Sequence of Operations at Power-On (2/2)
  28. Basic Sequence of Operations
  29. Basic Sequence of Operations in Page Separation Mode
  30. D. Main Motor (M1) Control Circuitry
  31. Operation
  32. E. Inputs to the DC Controller
  33. F. Outputs from the DC Controller
  34. G. Inputs to and Outputs from Accessories
  35. I. OUTLINE OF OPERATION
  36. II. LENS DRIVE SYSTEM
  37. Moving the Lens
  39. III. SCANNER DRIVE SYSTEM
  40. Scanner Sensors and the Signals
  42. Movement of the Scanner in Page Separation Mode
  43. Cable
  44. Removing the Scanner Drive Cable
  45. Adjusting the Tension of the Scanner Drive Cable
  46. Adjusting the Scanner Home Position
  47. Positioning the Scanner Locking Solenoid (SL1)
  48. B. Lens Drive Assembly
  49. Removing the Lens Stage Temporarily
  50. Installing the Light-Blocking Belt Mount
  51. Removing the Lens X Direction Drive Motor
  52. Attaching the Lens X Direction Drive Belt
  53. Replacing the Light Blocking Belt
  54. Table Of Contents
  55. I. PROCESSES
  56. Control Method
  57. Potential Measurement Circuit
  58. B. Controlling the Intensity of the Scanning Lamp
  59. Auto Exposure Control
  60. Making Checks
  61. C. Controlling the Primary/Transfer Corona Current
  62. Controlling the Transfer Corona Current
  63. D. Controlling the Separation/Pre Transfer Corona Current
  64. Separation/ Pre-Transfer Corona Current
  65. of the Separation/Pre-Transfer Corona Current
  66. E. Controlling the Blanking Exposure Lamp (LED)
  67. f. drum heater circuit
  68. cleaning mechanism
  69. A. Scanning Lamp Assembly
  70. Removing the Thermal Fuse
  71. C. Pre-Exposure Lamp Unit
  72. D. Blanking Exposure Lamp Assembly
  73. E. Photosensitive Drum
  74. Replacing the Drum Heater
  75. F. Potential Sensor Assembly
  76. H. Pre-Transfer Charging Assembly
  77. Separation Charging Assembly
  78. J. Charging Wire
  79. Stringing the Grid Wire of the Primary Charging Assembly
  80. Adjusting the Height of the Charging Wire
  81. Cleaning the Primary Charging Assembly Anti-Stray Sheet
  82. K. Developing Assembly
  83. Removing the Blade Unit
  84. Cylinder and the Magnetic Seal
  85. Cleaning the Developing Assembly Anti-Stray Sheet
  86. L. Hopper Assembly
  87. M. Drum Cleaner
  88. Installing the Cleaning Blade
  89. Installing the Side Seal
  90. N. Separation Claw/Separation Claw Drive Assembly
  91. O. Waste Toner Feeding Assembly
  92. Table Of Contents
  93. I. PICK-UP/FEEDING SYSTEM
  94. II. CASSETTE PICK-UP
  95. Outline
  96. B. Cassette Lifter Operation
  97. C. Identifying the Size of Copy Paper in the Cassette
  98. Markings on the Width Guide Rail
  99. Paper Size
  100. Registering Paper Width Basic Value
  101. b. lifter operation
  102. d. high-speed pick-up
  103. V. CONTROLLING THE REGISTRATION CLUTCH
  104. VI. MAKING TWO-SIDED/OVERLAY COPIES
  106. Outline of Operation
  107. D. Reversal Delivery
  108. Sequence of Reversal Delivery Operations
  109. Sided/Overlay/Reversal Delivery Copies
  110. Jogging Plate and the Trailing Edge Guide Plate
  111. Detecting the Presence Absence of Copy Paper
  112. F. Re-Pick Up from the Holding Tray
  113. G. Skipping Operation
  114. Outline of Operations
  115. Skipping Operation (odd number of originals)
  117. Reversal Delivery
  118. VII. DETECTING JAMS
  119. Registration Roller Delay Jam
  120. Pick-Up Vertical Path Feeding 0/1 Delay Jam
  121. Pick-Up Vertical Path Feeding 2 through 4 Delay Jam
  122. Fixing Assembly Outlet Delay Jam
  123. External Delivery Delay Jam
  124. Internal Delivery Delay Jam
  125. Holding Tray Inlet Delay Jam
  126. Holding Tray Re-Pick Up Delay Jam
  127. Holding Tray Registration Stationary Jam
  128. VIII. DISASSEMBLY AND ASSEMBLY
  129. A. Multifeeder Assembly
  130. B. Front Paper Deck Assembly
  131. Removing the Pick-Up Roller
  132. Removing the Feeding Roller
  133. Adjusting the Pressure of the Separation Roller
  134. Orientation of the Separation Roller
  135. Roller of the Cassette/Deck Pick-Up Assembly
  136. Releasing Solenoid of the Cassette
  137. Removing the Pick-Up Assembly from the Copier
  138. Removing the Separation Roller
  139. Roller Assembly of the Left Deck Pick-Up Assembly
  140. Assembly
  141. Construction
  142. Removing the Registration Roller (upper rubber roller)
  143. Removing the Fixing/Feeding Unit
  144. Removing the Feeding Belt
  145. H. Holding Tray Assembly
  146. Removing the Holding Tray from the Copier
  147. Removing the Holding Tray Registration Paper Sensor
  148. Removing the Re-Pick Up Roller
  149. Removing the Holding Tray Y Motor
  150. Removing the Y Motor Home Position Sensor
  151. Roller/Separation Belt Assembly
  153. Removing the Separation Belt Assembly
  154. Paper Deflecting Plate Drive Solenoid
  155. Removing the Holding Tray X Motor
  156. Removing the Holding Tray Paper Jogging Solenoid
  157. Paper Jogging Guide Plate Assembly
  158. the Holding Tray Assembly Paper Jogging Guide Plate
  159. I. Holding Tray Feeding Assembly
  160. Holding Tray Feeding Assembly
  161. C. Controlling the Fixing Temperature
  162. D. Reciprocating Mechanism for the Main Thermistor (TH1)
  163. the Upper Separation Claw
  164. F. SSR Error Detection Circuit for the Fixing Heater
  165. G. Locking Operation (fixing/feeding unit)
  166. H. Error Detection Circuit
  167. Fixing Heater Error Activation Detection Circuit
  168. Motor Error Rotation Detection Circuit
  169. II. DISASSEMBLY AND ASSEMBLY
  170. A. Fixing Assembly
  171. Removing the Fixing Cleaning Belt
  172. Installing the Fixing Cleaning Belt
  173. Removing the Upper Fixing Unit
  174. Removing the Fixing Heater
  175. Installing the Fixing Heater
  176. Installing the Upper Fixing Roller
  177. Removing the Thermal Switch
  178. Removing the Lower Separation Claw Assembly
  179. Removing the Lower Roller
  180. Adjusting the Nip (tightening the pressure adjusting nut)
  181. Adjusting the Fixing Clutch
  182. B. Delivery Assembly
  183. Removing the Fixing/Feeding Assembly Locking Assembly
  184. Paper Sensor and the Internal Delivery Paper Sensor
  185. Removing the Internal Delivery Assembly Roller
  186. Table Of Contents
  187. I. CONTROL PANEL
  188. LCD Processing
  189. Automatic Control of LCD Contrast
  190. Touch Switch Inputs
  191. II. FANS
  192. III. POWER SUPPLY
  193. B. Power Supply Circuit
  194. C. Date/Time Display Power Supply
  195. IV. DISASSEMBLY AND ASSEMBLY
  196. A. External Covers
  197. Removing the Front Door
  198. Removing the Inside Upper Cover
  199. Removing the Fixing/Feeding Unit Front Cover
  200. Sliding Out the Hopper Assembly
  201. b. control panel
  202. c. door switch assembly
  203. d. fan unit
  204. Removing the Cleaner Fan
  205. Removing the Feeding Fan
  206. F. Main Motor Assembly
  207. G. Fixing/Waste Toner Drive Assembly
  208. H. Main Drive Assembly (drum developing)
  209. I. Vertical Path Drive Assembly
  210. J. Pick-Up Drive Assembly
  211. Removing
  212. K. Duplexing Drive (1) Assembly
  214. L. Lifter Drive Assembly
  215. M. Cassette Pick-Up Drive Assembly
  216. N. Attaching the Drive Belt
  217. O. DC Controller PCB
  218. P. DC Power Supply Assembly
  219. Q. High-Voltage Transformer Assembly
  220. R. Power Supply Inlet Assembly
  221. paper deck-a
  222. I. SIDE PAPER DECK
  223. Outputs from the Side Deck Driver (1/1)
  224. B. Pick-Up
  225. Sequence of Operations (deck pick-up)
  226. C. Detection of Paper for the Deck
  227. D. Deck Lifter
  228. Opening/Closing the Deck
  229. Sequence of Operations (deck opening/closing)
  230. Positioning the Roll
  231. C. Drive System
  232. Removing the Deck Main Motor (M101)
  233. Removing the Deck Lifter Motor (M102)
  234. Routing the Lifter Cable
  235. D. Feeding System
  236. Removing the Deck Pick-Up Roller
  237. Removing the Deck Feeding Roller
  238. Removing the Deck Separation Roller
  239. Adjusting the Deck Separation Roller Pressure
  240. E. Electrical System
  241. Table Of Contents
  242. I. SELECTING THE SITE
  243. II. UNPACKING AND INSTALLING
  244. A. Unpacking
  245. B. Installing the Scanner
  246. C. Installing the Fixing Assembly
  247. D. Installing the AP Kit and the Charging Assemblies
  248. E. Installing the Copy Tray
  249. Replacing the Delivery Roller Leaf Spring
  250. F. Checking the Developing Assembly
  251. G. Installing the Pick-Up Assembly
  252. H. Supplying Toner
  253. i. connecting the rdf connector
  254. III. RELOCATING THE MACHINE
  255. IV. INSTALLING THE CONTROL CARD V
  256. V. INSTALLING THE COPY DATA CONTROLLER-A1
  257. installation procedure
  258. B. Installing to the Copier
  259. C. Checking the Operation
  260. VI. INSTALLING THE REMOTE DIAGNOSTIC DEVICE II
  261. I. PERIODICALLY REPLACED PARTS
  262. II. CONSUMABLES AND DURABLES
  264. Table Of Contents
  265. a. image adjustment
  266. b. exposure system
  267. routing the scanner drive cable
  268. c. image formation system
  269. position of the roller electrode
  270. d. pick-up/feeding system
  271. e. fixing system
  272. f. electrical system
  273. a. initial checks
  274. b. sample image faults
  275. c. troubleshooting image faults
  276. a. troubleshooting malfunctions
  277. ac power is absent
  278. dc power supply is absent
  279. pick-up fails. (multifeeder)
  280. the vertical path roller fails to rotate
  281. the lens fails to move
  282. pick-up fails. (paper deck-a)
  283. a. copy paper jams
  284. pick-up assembly
  285. fixing/delivery assembly
  286. cleaning assembly
  287. b. feeding faults
  288. a. sensors
  289. c. motors and fans
  290. d. clutches
  291. f. pcbs
  292. g. paper deck-a
  293. check pins by pcb
  294. ac driver pcb
  295. control cpu pcb
  296. holding tray driver pcb
  297. potential measurement pcb
  298. hvt1 pcb
  299. hvt2 pcb
  300. lamp regulator pcb
  301. vii. service mode
  302. b. using service mode
  303. f. adjustment mode
  304. h. options mode
  305. i. counter mode
  306. viii. self diagnosis
  307. c. sorter
Canon NP6251 Service Manual Manual pdf 242 page image
13. Holding Tray Inlet Delay JamFigure 5-71414. Holding Tray Inlet Stationary JamFigure 5-715Holding tray inlet delay jamcheckJam indicatorSCFWJam checkPick-up motor (M2)Holding tray inlet sensor(PS15)LSTRNormalIErrorI: Varies according to paper length.Internal delivery sensor(PS12)Jam indicatorSCFWErrorJam checkPick-up motor (M2)Holding tray inlet sensor(PS15)LSTRNormal0.2 secCOPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 5 PICK-UP/FEEDING SYSTEM5-55
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