Canon NP6621- User Manual

Canon NP6621

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Table of Contents:

  • Page 2 – COPYRIGHT © 1998 CANON INC.; Prepared by; IMPORTANT
  • Page 3 – Introduction
  • Page 4 – i i
  • Page 5 – iii; CONTENTS; F. Inputs to and Outputs from the Cassette
  • Page 6 – iv; D. Protection Mechanisms for the Power; CHAPTER 5; II. UNPACKING AND INSTALLING THE; CHAPTER 4
  • Page 7 – CHAPTER 6
  • Page 9 – CHAPTER 1
  • Page 11 – Multiple front loading and multifeeder for space saving.; compared to other Canon copiers)
  • Page 13 – Copy paper type
  • Page 14 – Table 1-201 Defaults Reproduction Ratio
  • Page 15 – Cassette Feeding Unit-K1
  • Page 18 – Cross Section of the Body
  • Page 26 – a. Placing originals on the platen glass
  • Page 27 – C. Using the Stack Bypass; You can place up to 50 sheets of copy paper (a
  • Page 28 – ) Adjust the slide guides to fit the size; size of the copy stock.; ) Align the required number of sheets; If the Stack Bypass Size Entry in Custom; key until the stack
  • Page 29 – The Use of Keys and Displays That
  • Page 30 – Auto Energy Saver Time
  • Page 31 – Zoom Fine Adjustment
  • Page 35 – Initializing User Mode
  • Page 36 – ACTIONS; Flashes on the Control Panel
  • Page 40 – Lights (Checking the Right
  • Page 41 – Flashes (Replacing the Toner; • If the toner has run low, the Replace Toner
  • Page 43 – B. Cleaning the Static Charge
  • Page 45 – CHAPTER 2
  • Page 48 – B. Latent Static Image
  • Page 49 – Before primary charging takes place, the light of
  • Page 50 – In this step, the optical image of an original is; Toner; Blade; Optical image
  • Page 51 – The transfer roller deposits negative charges
  • Page 52 – The copier uses a curvature separation method,; Static eliminator; Transfer roller
  • Page 53 – In this step, the copy paper is pressed between; Oil application roller
  • Page 54 – II. AUXILIARY PROCESS; Blank exposure is executed to remove the drum
  • Page 55 – CHAPTER 3; represents mechanical drive paths, and
  • Page 57 – A. Functional Construction
  • Page 58 – cuitry; The machine’s most electrical mechanisms are
  • Page 59 – C. Inputs to the DC Controller
  • Page 64 – D. Outputs from the DC Controller
  • Page 69 – E. Inputs to and Outputs from the Cassette Feeding Module-B2
  • Page 70 – F. Inputs to and Outputs from the Cassette Feeding Module-A2
  • Page 72 – G. Inputs to and Outputs from the Cassette Feeding Unit-K1
  • Page 77 – H. Main Motor Control Circuit
  • Page 80 – Each original size sensor consists of a LED and; J. Original Size Detection; The machine offers auto paper selection, auto
  • Page 81 – When the copyboard cover is brought down to
  • Page 82 – Original Size Detection; based on the sensor output combinations given in Table 3-102.
  • Page 83 – EXPOSURE SYSTEM; A. Varying the Reproduction
  • Page 85 – Lens Motor Drive Circuit
  • Page 86 – Basic Sequence of Operations for; In enlargement/reduction mode, the lens is
  • Page 87 – C. Scanner Drive System; The scanner drive system is driven by the scanner
  • Page 88 – Relationship between Scanner Sensors and Signals
  • Page 89 – Driving the Scanner Motor; The scanner motor is a 4-phase control step-
  • Page 90 – D. Operations of the Scanner in Page Separation Mode; The microprocessor determines how much the
  • Page 91 – SYSTEM; The machine’s image formation system con-
  • Page 93 – C. Controlling the Scanning; a. Turning the Scanning Lamp ON and OFF
  • Page 94 – D. Controlling the Primary
  • Page 95 – ing Roller Bias
  • Page 96 – • Flow
  • Page 97 – E. Controlling the Transfer
  • Page 98 – • Corrects the voltage level of the transfer bias.
  • Page 99 – Bias
  • Page 100 – nator Bias; Figure 3-307 show the circuit that controls the
  • Page 101 – Switching the Voltage Level of the
  • Page 102 – G. Controlling the Developing
  • Page 103 – Controlling the Voltage Level of the
  • Page 104 – H. Copy Density Automatic; Control Operations; Figure 3-311 AE Sensor Reading Area
  • Page 106 – The machine’s photosensitive drum, developing
  • Page 107 – Toner Level Detection Control
  • Page 109 – J. Blank Exposure Control; The machine directs light from the pre-exposure
  • Page 110 – Margin and Sheet Gap; The microprocessor (Q301) on the DC controller
  • Page 111 – K. Primary Charging Roller; The machine’s primary charging roller is; Primary Charging Roller Cleaning
  • Page 112 – Releasing Control; The machine’s transfer roller is equipped with a
  • Page 113 – Copy paper is controlled by the registration
  • Page 117 – Copying on the 1st Side
  • Page 118 – Copying on the 2nd Side
  • Page 119 – The machine uses a set-back method and a; Copy paper
  • Page 120 – back roller is driven by a special stepping motor.
  • Page 122 – The second copy paper is moved to the duplexing unit.
  • Page 123 – duplexing unit inlet.
  • Page 125 – After copying on the first side, the copy paper
  • Page 126 – roller rotate clockwise.
  • Page 127 – clockwise to pick up the second copy paper.
  • Page 128 – The cassette unit is equipped with a pick-up
  • Page 130 – The cassette unit motor 1 (M1cu) is used to drive
  • Page 132 – Basic Construction; The paper deck unit controls the operation of
  • Page 133 – When the copier’s COPY START key is pressed,
  • Page 135 – When the deck is slid inside the pedestal, the
  • Page 137 – Detecting Paper in the Deck; a. Identifying the Size of Paper
  • Page 138 – The multifeeder is a mechanism which picks up
  • Page 139 – Identifying the Size of Paper on the; The size of paper on the tray is identified by the
  • Page 141 – H. Identifying the Size of the; Cassette size
  • Page 142 – To change the size of a cassette, move the
  • Page 143 – Fixing/Delivery Assembly; perature
  • Page 144 – Target temperatures for the following size paper:
  • Page 145 – Oil Application Roller
  • Page 146 – perature Control System
  • Page 147 – Detecting Overheating of the End of; The rear end of the machine’s fixing heater is; Protection Mechanism; The machine is equipped with the following; c. Heater ON Detection
  • Page 149 – Vertical Path Roller 1 Delay Jam; Figure 3-445 Sequence of Operations
  • Page 150 – Vertical Path Roller 2 Delay Jam; Figure 3-446 Sequence of Operations; Vertical Path Roller 2 Timing Jam; Figure 3-447 Sequence of Operations
  • Page 151 – Figure 3-448 Sequence of Operations
  • Page 152 – Separation Delay Jam; Figure 3-450 Sequence of Operations; Separation Timing Jam; Figure 3-451 Sequence of Operations
  • Page 153 – Delivery Delay Jam; Figure 3-452 Sequence of Operations
  • Page 154 – Delivery Stationary Jam; has turned ON because of feeding faults.; Figure 3-453 Sequence of Operations
  • Page 155 – Figure 3-455 Sequence of Operations
  • Page 157 – POWER SUPPLY; A. Outline of Power Distribution
  • Page 158 – B. Power Supply Circuitry; The machine’s power supply unit uses a single
  • Page 159 – C. Detecting Errors on the; The microprocessor (U402) and LED501 on the; Data Error in the High-Voltage Output; If the difference between the actual control
  • Page 160 – D. Protection Mechanisms for; The composite power supply PCB is
  • Page 161 – B. Using Service Mode; Starting Service Mode
  • Page 162 – Recording on the Service Label
  • Page 164 – No. 101 Jam Location Display
  • Page 165 – No. 120 Jam interval indication
  • Page 170 – number on the numeric keypad.
  • Page 175 – Item
  • Page 177 – A. Copier Self Diagnosis
  • Page 179 – Initializing Back-Up Error Codes; If the self-diagnosis mechanism has turned ON,
  • Page 180 – B. Self Diagnosis on the Cassette Feeding Unit
  • Page 182 – D. Sorter Self Diagnosis
  • Page 183 – ADJUSTMENTS; AE Adjustment
  • Page 186 – Remarks
  • Page 189 – Initializing the Back-Up RAM
  • Page 191 – electric continuity be sure to use the washer for reassembly.
  • Page 193 – EXTERNALS
  • Page 194 – Removing the Control Panel; C. Removing the Display
  • Page 195 – Removing the Exhaust Fan
  • Page 197 – DRIVE SYSTEM; A. Scanner Drive System; Removing the Scanner Drive Motor; Scanner wire
  • Page 198 – Assembling the Mirror Positioning; ) Pull the arm out of the main frame, and extend; Position A
  • Page 199 – Routing the Scanner Cable
  • Page 202 – B. Lens Drive Assembly; Removing the Lens Drive Motor
  • Page 203 – ) Remove the two screws
  • Page 204 – Routing the Lens Cable; Figure 4-222 Lens Drive Assembly; ) Stop the lens cable at each pulley
  • Page 205 – Positioning the Change Solenoid
  • Page 206 – Removing the Main Motor Unit; ) Disconnect the two connectors; Routing the Drive Belt
  • Page 207 – Points to Note When Installing the
  • Page 208 – Removing the Separation Pad
  • Page 209 – B. Multifeeder Assembly; Roller Unit
  • Page 211 – bly Paper Guide Plate Cam
  • Page 212 – bly; Removing the Registration Clutch; Hole
  • Page 213 – ) Remove the upper registration roller; Removing the Lower Registration; bushing
  • Page 214 – Removing the Feeding Belt
  • Page 215 – F. Duplexing Assembly; Removing the Duplexing Assembly
  • Page 216 – sette Unit
  • Page 217 – Points to Note When Installing the
  • Page 218 – Removing the Cassette Driver PCB
  • Page 219 – Removing the Pedestal Motor Drive
  • Page 220 – Removing the Lifter Wire
  • Page 223 – Removing the Feeding Roller
  • Page 224 – Removing the Separation Roller; Front of copier
  • Page 225 – ration Roller; If double feeding or pick-up failure occurs fre-; leasing Solenoid; Install the solenoid so that the pick-up roller arm
  • Page 226 – A. Illuminating Assembly; rescent Heater
  • Page 227 – Removing the Blank Exposure Lamp
  • Page 228 – Routing the Blank Shutter Cable
  • Page 229 – Installing the Lens Heater
  • Page 230 – CHARGING SYSTEM; Removing the Drum Unit; ) Pull out the drum unit
  • Page 231 – Removing the Primary Charging Unit
  • Page 232 – Positioning the Primary Charging; Removing the Transfer Roller
  • Page 233 – Installing the Drum Heater
  • Page 234 – TEM; Removing the Developing Assembly
  • Page 235 – Removing the Developing Cylinder
  • Page 236 – Installing the Side Seal and the Blade
  • Page 237 – FIXING SYSTEM; Removing the Upper Fixing Unit; fixing assembly cover
  • Page 238 – Removing the Fixing Roller
  • Page 239 – Points to Note after Replacing the
  • Page 240 – Removing the Lower Fixing Unit
  • Page 241 – Adjusting the Lower Fixing Roller
  • Page 242 – B. Composite Power Supply; ply PCB
  • Page 243 – ) Remove the grounding wire; Points to Note When Replacing the; • After replacement, perform the following:
  • Page 245 – VI. CASSETTE HEATER KIT 5 INSTALLATION; mechanisms and run necessary checks after installation.
  • Page 247 – I. SELECTING THE SITE; Keep the following in mind when selecting the
  • Page 248 – II. UNPACKING AND INSTALLING THE COPIER; A. Unpacking and Removing Fixings
  • Page 249 – Step
  • Page 250 – Work
  • Page 251 – B. Turning On the Copier
  • Page 253 – C. Checking the Images and Operations
  • Page 254 – D. Attaching the Drum Unit; Knob
  • Page 255 – E. Changing the Cassette Size
  • Page 257 – III. RELOCATING THE COPIER
  • Page 258 – IV. REPLACING THE DRUM UNIT; Go through the following when replacing the drum unit:
  • Page 260 – CONTROL CARD IV N
  • Page 261 – 1) Connect the connector
  • Page 263 – ) Remove both top and bottom cassettes, and
  • Page 264 – ) Fix the mounting plate 1 in place to the copier’s
  • Page 266 – ) Remove the cassettes and all rear covers from
  • Page 267 – ) Install the cord clamp to the hole in the rear side; • Cassette Feeding Module-B2
  • Page 268 – 0) Lead the other connector on the relay harness; 2) Fix the relay harness in place to the rear side
  • Page 269 – • Cassette Feeding Module-A2
  • Page 270 – VII. CASSETTE HEATER KIT 7 INSTALLATION PRO-
  • Page 272 – ) Connect the relay harness to the heater.; ) Connect the relay harness to the connector on
  • Page 273 – C. Attaching the Ratings; ) Peel the backing sheet from the label, and
  • Page 274 – B. Installation to the Copier
  • Page 283 – PERIODICALLY REPLACED PARTS; A. Periodically Replaced Parts; Life
  • Page 284 – II. DURABLES AND CONSUMABLES
  • Page 285 – and Cassette Feeding Unit-K1
  • Page 287 – A. Scheduled Maintenance Work
  • Page 289 – APPENDIX
  • Page 291 – A. GENERAL TIMING CHART
  • Page 292 – B. SIGNALS AND ABBREVIATIONS
  • Page 295 – C. GENERAL CIRCUIT DIAGRAM; not available
  • Page 297 – D. DC CONTROLLER CIRCUIT DIAGRAM
  • Page 311 – E. COMPOSITE POWER SUPPLY CIRCUIT DIAGRAM
  • Page 313 – PRIMARY
  • Page 314 – DISCHARGE
  • Page 317 – F. CONTROL PANEL KEY PCB
  • Page 321 – G. AE SENSOR CIRCUIT DIAGRAM
  • Page 322 – H. INTENSITY SENSOR CIRCUIT DIAGRAM
  • Page 323 – TONER LEVEL DETECTION CIRCUIT DIAGRAM
  • Page 331 – N. CASSETTE FEEDING UNIT-K1 GENERAL CIRCUIT DIAGRAM; Cassette pedestal controller PCB
  • Page 335 – P. PAPER DECK PEDESTAL-K1 GENERAL CIRCUIT DIAGRAM
  • Page 336 – Q. PAPER DECK PEDESTAL-K1 DRIVER CIRCUIT DIAGRAM
  • Page 340 – This publication is printed on
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FY8-13F4-000

FEB. 1998

COPYRIGHT ©

1998 CANON INC.

CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)

SERVICE
MANUAL

REVISION 0

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Summary

Page 2 - COPYRIGHT © 1998 CANON INC.; Prepared by; IMPORTANT

COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) COPYRIGHT © 1998 CANON INC. Printed in Japan Imprimé au Japon Use of this manual should be strictly supervised to avoid disclosure of confidential information. Prepared by OFFICE IMAGING PRODUCTS TECHNICAL S...

Page 3 - Introduction

Introduction i COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) This Service Manual provides basic facts and figures you will need to service the plain paper copier NP6621 in the field. The NP6621 is designed to enable automated copying work and may be con...

Page 4 - i i

i i Introduction COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) RDF-F1 (Recirculating Document Feeder)Automatically feeds a set of up to 100 originals to theplaten glass for copying. The RDF can also turn overtwo-sided originals for automatic two-sided c...

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