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D 1531iD/D 1831iD
SERVICE MANUAL
[GENERAL]
GENERAL
14413
CONTENTS
1. SPECIFICATION .............................................................................................G-1 2. PRECAUTIONS FOR INSTALLATION ............................................................ G-5 2-1. Installation Site ........................................................................................ G-5 2-2. Power Source .......................................................................................... G-5 2-3. Grounding ................................................................................................ G-5 3. PRECAUTIONS FOR USE .............................................................................. G-6 3-1. To ensure that the copier is used in an optimum condition ..................... G-6 3-2. Operating Environment ............................................................................ G-6 3-3. Power Requirements ............................................................................... G-6 3-4. Note ......................................................................................................... G-6 4. HANDLING OF CONSUMABLES .................................................................... G-7 5. OTHER PRECAUTIONS ................................................................................. G-8 6. SYSTEM OPTIONS ......................................................................................... G-9
i
1.
SPECIFICATION
: : : : : : Console/Desktop Type CCD Line Sensor Organic Photoconductor Electrostatic Dry Powdered Image Transfer to Plain Paper with a Laser 600 × 600 dpi 2-way system Manual Bypass...Single Drawer................250 Sheets Mirror Scanning MT-HG System Comb Electrode (1) DC Negative Corona with Scorotron System Roller Image Transfer Paper Separator Fingers and Charge Neutralizing Plate Heat Roller Charge Neutralizing Brush A3L, 11 × 17 Drawer
2
TYPE ORIGINAL SCANNING SYSTEM PHOTOCONDUCTOR COPYING SYSTEM RESOLUTION PAPER FEEDING SYSTEM
EXPOSURE SYSTEM DEVELOPING SYSTEM CHARGING SYSTEM IMAGE TRANSFER SYSTEM PAPER SEPARATING SYSTEM FUSING SYSTEM PAPER DISCHARGING SYSTEM MAX. ORIGINAL SIZE COPY MEDIUM Paper Source
: : : : : : : :
Manual Bypass 297 × 432 mm 90 × 140 mm
Plain Paper (60 to 90 g/m ) Transparencies Type Thick Paper (91 to 157 g/m2) Postcards Recycled Paper (60 to 90 g/m ) Dimensions MULTIPLE COPIES WARMING-UP TIME FIRST COPY TIME Maximum (Width × Length) Minimum (Width × Length)
2
297 × 432 mm 90 × 140 mm
: 1 to 99 : 30 sec. or less (23, Rated Voltage) : 7 sec. or less (A4C, Drawer, full size mode) Speed D 1531iD 15 12 9 10 16 13 15 12 9 10 10 D 1831iD 18 14 10 12 20 15 18 14 10 12 12
CONTINUOUS COPY SPEED (copies/min) Size A4C A4L A3L B4L B5C B5L 8-1/2 × 11C 8-1/2 × 11L 11 × 17L 8-1/2 × 14L 11 × 14
G-1
ZOOM RATIOS Metric Full Size Enlargement Fixed Reduction Variable LENS EXPOSURE LAMP 100 % 200 % 141 % 115 % 81 % 70 % 50 % 50 % to 200 % (in 1 % increments) : Through Lens : Fluorescent Lamp Inch 100 % 200 % 129 % 121 % 78 % 64 % 50 %
POWER/CURRENT CONSUMPTION (copier only) Exposure Lamp (Rating) Fusing Roller Heater Lamp (Rating) Max. Power Consumption (full system) 110 V: 970 W 120 V: 1090 W 127 V: 1180 W 220 V: 990 W 230 V: 1050 W 240 V: 1120 W Max. Current Consumption (full system) 110 V: 8.9 A 120 V: 9.1 A 127 V: 9.3 A 220 V: 4.5 A 230 V: 4.6 A 240 V: 4.7 A
24 V 14.4 W
900 W
POWER REQUIREMENTS ENVIRONMENTAL CONDITIONS Temperature Humidity Levelness
: 110 V, 120 V, 127 V, 220 V to 240 V, 50/60 Hz
10 to 30 °C with a fluctuation of 10 °C or less per hour 15 to 85 % RH with a fluctuation of 10 % RH or less per hour 1° (1.75 mm/100 mm) : W...590 mm (23-1/4) D....611 mm (24) H....487 mm (19-1/4) : 39 kg (86 lb)
Ambient Illumination 3,000 lux or less
COPIER DIMENSION
COPIER WEIGHT
G-2
Multiple Bypass (MB-5): option TYPE INSTALLATION COPY PAPER TYPE Plain Paper (60 to 90 g/m2) Transparencies Type Thick Paper (91 to 157 g/m2) Postcards Recycled Paper (60 to 90 g/m ) Dimensions Size Maximum (Width × Length) Minimum (Width × Length)
2
: Multiple Bypass : Mounted on the copier 50 sheets 20 sheets 20 sheets 20 sheets 50 sheets 297 × 432 mm 90 × 140 mm
A3L, B4L, FLS, A4L, A4C, B5L, B5C, A5C,11 × 17, 11 × 14, 8-1/2 × 14, 8-1/2 × 11L, 8-1/2 × 11C, 8-1/2 × 5-1/2 : : : : : Center 50 sheets (80 g/m2) DC24 V, DC5 V (supplied from copier) 9 W or less W...245 mm (9-3/4) D....435 mm (17-1/4) H....137 mm (5-1/2) : 2.7 kg (6 lb) : Same as copier
DOCUMENT ALIGNMENT CAPACITY POWER REQUIREMENTS MAX. POWER CONSUMPTION DIMENSIONS
WEIGHT OPERATING ENVIRONMENT
G-3
Job Tray (JS-202): option TYPE INSTALLATION CAPACITY Exit Tray of the machine 150 sheets (A4C/L) 75 sheets (except A4C/L) Job Tray 1Stacking height up to 22 mm 100 sheets (A4C/L) 50 sheets (except A4C/L) 10 sheets Stacking height up to 22 mm 100 sheets (A4C/L) 50 sheets (except A4C/L) 140 × 140 mm : Multiple Bypass : Mounted on the copier
Plain Paper (60 to 90 g/m2)
Transparencies Type Thick Paper (91 to 157 g/m2) Postcards 150 sheets (A4C/L) Recycled Paper (60 to 90 g/m2) 75 sheets (except A4C/L) Maximum (Width × Length) Minimum (Width × Length) 20 sheets
Dimensions
297 × 432 mm 90 × 140 mm
Exit Tray by Application Mode Application Mode Fax and Copier Printer and Copier Fax, Copier and Printer POWER REQUIREMENTS Exit Tray of the machine Copier Copier Copier Job Tray Fax Printer Fax and Printer
: DC24 V, DC5 V (supplied from copier)
Shifting Unit (OT-103): option TYPE INSTALLATION POWER REQUIREMENTS : Multiple Bypass : Mounted on the copier : DC24 V, DC5 V (supplied from copier)
G-4
2.
2-1.
PRECAUTIONS FOR INSTALLATION
Installation Site
To ensure safety and utmost performance of the copier, the copier should NOT be used in a place: · Where it will be subjected to extremely high or low temperature or humidity. · Where it will be subjected to sudden fluctuations in either temperature or humidity. · Which is exposed to direct sunlight. · Which is in the direct air stream of an air conditioner, heater, or ventilator. · Which has poor ventilation or is dusty. · Which does not have a stable, level floor or where it will receive undue vibration. · Which is near any kind of heating device. · Which is near volatile flammables (thinner, gasoline, etc.). · Where it may be splashed with water. · Which puts the operator in the direct stream of exhaust from the copier. · Where ammonia gas might be generated.
2-2.
Power Source
· If any other electrical equipment is sourced from the same power outlet, make sure that the capacity of the outlet is not exceeded. · Use a power source with little voltage fluctuation. · Never connect by means of a multiple socket any other appliances or machines to the outlet being used for the copier. · Ensure that the copier does not ride on the power cord or communication cable of other electrical equipment, and that it does not become wedged into or underneath the mechanism. · Make the following checks at frequent intervals: Is the power plug abnormally hot? Are there any cracks or scrapes in the cord? Has the power plug been inserted fully into the outlet? Does something, including the copier itself, ride on the power cord? Use an outlet with a capacity of 110 to 127 V, 15 A or more. 220 to 240 V, 10 A or more.
2-3.
Grounding
· Always ground the copier to prevent receiving electrical shocks in the case of electrical leakage. · Connect the ground wire to the ground terminal of the outlet or a grounding contact which complies with the local electrical standards. · Never connect the ground wire to a gas pipe, the ground wire for a telephone, lightning arrester, or a water pipe for fear of fire and electrical shock.
G-5
3.
3-1.
PRECAUTIONS FOR USE
To ensure that the copier is used in an optimum condition
· Never place a heavy object on the copier or subject the copier to shocks. · Insert the power plug all the way into the outlet. · Do not attempt to remove any panel or cover which is secured while the copier is making copies. · Do not turn OFF the copier while it is making copies. · Provide good ventilation when making a large number of copies continuously. · Never use flammable sprays near the copier. · If the copier becomes inordinately hot or produces abnormal noise, turn it OFF and unplug it. · Do not turn ON the power switch at the same time when you plug the power cord into the outlet. · When unplugging the power cord, do not pull on the cord; hold the plug and pull it out. · Do not bring any magnetized object near the copier. · Do not place a vase or vessel containing water on the copier. · Be sure to turn OFF the power switch at the end of the workday or upon power failure. · Use care not to drop paper clips, staples, or other small pieces of metal into the copier.
3-2.
Operating Environment
The operating environmental requirements of the copier are as follows. · Temperature: 10 to 30 °C · Humidity: 15 to 85 % RH · Rate of temperature change: 10 °C/h · Rate of humidity change: 10 % RH/h
3-3.
Power Requirements
The power source voltage requirements are as follows. · Voltage fluctuation: AC110 to 127 V/220 to 240 V ± 10 % (copying performance assured) +10 %/-15 % (paper feeding performance assured) · Frequency fluctuation: 50/60 Hz ± 0.3 %
3-4.
Note
· It is prohibited to copy paper and hard currencies, government securities, and municipal bonds (even when they are stamped as "Sample"). · For fear of infringement of copyright, it is also prohibited to copy copyrighted works, including books, music, works of art, maps, drawings, motion pictures, and photos except when the copy is to be used only personally.
G-6
4.
HANDLING OF CONSUMABLES
Before using any consumables, always read the label on its container carefully. · Paper can be easily damaged by dampness. To prevent absorption of moisture, store paper, which has been removed from its wrapper but not loaded in the drawer, in a sealed plastic bag in a cool, dark place. · Keep consumables out of the reach of children. · Do not touch the PC Drum with bare hands. · The same sized paper is of two kinds, short grain and long grain. Short grain paper should only be fed through the copier crosswise, long grain paper should only be fed lengthwise. · If your hands become soiled with toner, wash them with soap and water. · Do not throw away any used consumables (PC Drum, starter, toner, etc.). They are to be collected. · Do not burn, bury in the ground, or throw into the water any consumables (PC Drum, starter, toner, etc.). · Do not store consumables in a place which: Is hot and humid. Is subject to direct sunlight. Has an open flame nearby.
G-7
5.
OTHER PRECAUTIONS
Use the following precautions when performing service jobs for a copier that uses a laser. · When a service job needs to be performed in the laser beam path, such as when working around the printerhead or PC Drum, be sure first to unplug the power cord of the copier from the outlet. · If the job requires that the power cord be left plugged in, observe the following precautions. 1. Take off your watch, ring and any other reflective object and wear laser protective goggles. 2. Keep users away from the job site. 3. Do not bring a highly reflective tool into the laser beam path during the service job.
G-8
6.
1
SYSTEM OPTIONS
2
4021O009AA
3
1144M172AC 4021O010AA
7 4
4695U011AA 4021O013AB
6
4021O063AA
4021O012AA
5
4021O014AA
1. 2. 3. 4. 5. 6. 7. 8. 9.
Plug-In Counter Original Cover OC-5 Automatic Document Feeder AF-10 Multiple Bypass MB-5 Copy Desk Paper Feed Cabinet PF-120 Data Terminal DT-201 (only for USA) Job Tray JS-202 (Illustration none) Sifting Unit OT-103 (Illustration none)
10. Memory M16-4, M32-3 (Illustration none) 11. Mechanical Counter CNT1 (Illustration none)
G-9
MECHANICAL/ ELECTRICAL
14413
CONTENTS
1. 2. 3. 4. 5. 6. 7. 8. CROSS SECTIONAL VIEW ............................................................................ M-1 COPY PROCESS ............................................................................................ M-2 DRIVE SYSTEM .............................................................................................. M-4 SEQUENTIAL EXPLANATION ........................................................................ M-5 WATCHDOG FUNCTION (CPU OVERRUN MONITOR) ................................ M-6 5-1. Watchdog Function Post-Processing ....................................................... M-6 IMAGE STABILIZATION SYSTEM .................................................................. M-7 IMAGING UNIT (I/U) ........................................................................................ M-8 7-1. Imaging Unit (IU) Drive Mechanism ......................................................... M-9 PC DRUM SECTION ....................................................................................... M-10 8-1. PC Drum Drive Mechanism ..................................................................... M-10 8-2. Grounding of the PC Drum ......................................................................M-11 PC DRUM CHARGING SECTION ................................................................... M-12 IMAGE READING SECTION ........................................................................... M-13 10-1.Image Processing Process ......................................................................M-14 10-2.Exposure Components Section ............................................................... M-15 10-3.Scanner and Mirrors Carriage Movement Mechanism ............................M-16 (1) Scanner Movement Mechanism ...................................................... M-16 (2) 2nd/3rd Mirrors Carriage Movement Mechanism ............................M-16 10-4.Scanner Motor Drive Control ................................................................... M-17 MEMORY STORAGE IMAGE PROCESSING SYSTEM ................................. M-18 11-1.Laser Exposure Process ......................................................................... M-19 DEVELOPING UNIT SECTION ....................................................................... M-20 12-1.Developing Unit Drive Mechanism .......................................................... M-21 12-2.Sleeve/Magnet Roller .............................................................................. M-22 12-3.Developing Bias ....................................................................................... M-22 12-4.ATDC Sensor .......................................................................................... M-23 (1) ATDC Sensor Automatic Adjustment .............................................. M-23 12-5.Toner Replenishing Mechanism .............................................................. M-24 12-6.Toner Replenishing Control ..................................................................... M-25 12-7.T/C Recovery Mode ................................................................................. M-26 12-8.Toner Bottle Home Position Detection Mechanism ................................. M-27 PAPER TAKE UP/FEED SECTION ................................................................. M-28 13-1.Drawer In Position Detection ................................................................... M-29 13-2.Paper Empty Detection Mechanism ........................................................ M-29 13-3.Paper Lifting Plate ................................................................................... M-30 13-4.Universal Tray Paper Size Detection Mechanism ................................... M-30 13-5.Paper Take Up Mechanism ..................................................................... M-32 (1) Paper Separating Mechanism ......................................................... M-32 13-6.Paper Take Up Control ............................................................................ M-33 (1) Paper Take Up Retry Control .......................................................... M-33 MANUAL BYPASS SECTION ......................................................................... M-34 14-1.Paper Take Up Drive Mechanism ............................................................ M-34 14-2.Paper Detection Mechanism ................................................................... M-34 14-3.Manual Feed Take Up Control ................................................................ M-35 MULTIPLE BYPASS SECTION ....................................................................... M-36
9. 10.
11. 12.
13.
14.
15.
i
16. 17. 18. 19.
20.
21. 22.
15-1.Paper Take Up Drive Mechanism ............................................................ M-36 15-2.Paper Take-Up Mechanism ..................................................................... M-37 15-3.Paper Empty Detection Mechanism ........................................................ M-38 15-4.Paper Take Up Control ............................................................................ M-38 15-5.Paper Take Up Retry Control .................................................................. M-39 IMAGE TRANSFER AND PAPER SEPARATION SECTION .......................... M-40 PC DRUM CLEANING SECTION .................................................................... M-41 MAIN ERASE SECTION .................................................................................. M-42 FUSING UNIT SECTION ................................................................................. M-43 19-1.Fusing Unit Drive Mechanism .................................................................. M-44 19-2.Fusing Rollers Pressure Mechanism ....................................................... M-44 19-3.Fusing Temperature Control .................................................................... M-45 19-4.CPM Control ............................................................................................ M-45 JOB TRAY (JS-202): Option ............................................................................ M-46 20-1.Tray Selecting Mechanism ......................................................................M-47 20-2.Tray-Full Detecting Mechanism ............................................................... M-48 20-3.Job Tray Paper Detecting Mechanism .................................................... M-48 SHIFTING UNIT (OT-103): Option .................................................................. M-49 21-1.Exit Position Shifting Mechanism ............................................................ M-50 OTHER MECHANISM ..................................................................................... M-52 22-1.Cooling Mechanism ................................................................................. M-52 (1) Power Supply Section Cooling Mechanism ..................................... M-52 (2) Fusing Section Cooling Mechanism ................................................ M-53
ii
1.
CROSS SECTIONAL VIEW
1
2
5
3
4
4021M001AA
1. IR Section 2. Fusing Unit 3. Imaging Unit
4. Paper Take-Up/Feed Section 5. PH Section
M-1
2.
COPY PROCESS
4021M065CB
1. PC Drum · Used as the medium on which a visible developed image of the original is formed. 2. Drum Charging · A uniform negative DC charge is deposited across the entire surface of the PC Drum. 3. Photoelectric Conversion · CCD converts the image data represented by light reflected off the original to a corresponding electrical signal which, in turn, is output to IR image-processing section. 4. IR Image-Processing · The electrical signal is converted to an 8-bit digital image signal (A/D conversion) which, in turn, goes through appropriate correction before being output to the PH Image Processing. 5. PH Image Processing · After going through corrections, the digital image signal is converted to a corresponding electrical signal (D/A conversion) that controls the intensity of the light from the laser diode. 6. Laser Exposure · The laser beam strikes the surface of the PC Drum, forming an electrostatic latent image. 7. Developing · Toner negatively charged in the Developer Mixing Chamber is attracted onto the electrostatic latent image changing it to a visible, developed image. · An AC/DC negative bias voltage is applied to the Sleeve/Magnet Roller to prevent toner from being attracted onto those areas of the PC Drum which correspond to the background areas of the original. 8. Paper Feed · Paper is fed from the drawer.
M-2
9. Bypass Paper Feed · Feeds paper from the Manual Bypass Tray, one piece at a time. · The optional Multiple Bypass Tray (MB-5), when mounted on the machine, permits continuous paper feeding. 10. Image Transfer · A DC positive charge is applied to the Image Transfer Roller to transfer the visible image on the surface of the PC Drum onto the paper.Paper Separation. 11. Paper Separation · The PC Drum Paper Separator Fingers remove paper from the surface of the PC Drum. · The Charge Neutralizing Plate neutralizes any charge left on the paper. 12. Cleaning · Residual toner on the surface of the PC Drum is scraped off. · The toner is then recycled back to the Developing Unit. 13. Main Erase · Light is directed to the surface of the PC Drum to neutralize any surface potential remaining there after cleaning. 14. Paper Transport · The paper is fed to the Fusing Unit. 15. Fusing · The developed image is permanently fused to the paper by a combination of heat and pressure applied by the Right and Left Fusing Rollers. 16. Paper Exit · The paper is fed out onto the Exit Tray. · When the optional Job Tray (JS-202) is mounted, the specific tray into which paper is fed is selected according to the application mode. · The optional Shifting Unit (OT-103), when mounted, permits different finishing functions set on the machine (Non-Sort, and Sort).
M-3
3.
DRIVE SYSTEM
1
Paper Exit Roller Gear Transport Roller Gear Fusing Roller Gear
PC Drum Synchronizing Roller Clutch Paper Take-Up Roller Gear
2
4021M003AA
1. Scanner Motor M5 2. Main Motor M1
M-4
4.
Power Switch ON
Start Key ON
Polygon Motor M2
150 °C Predrive Warm-up completed
Exposure Lamp LA2
Main Motor M1
Paper Take-Up Solenoid SL1
Synchronizing Roller Sensor PC1
Synchronizing Roller Clutch CL1
SEQUENTIAL EXPLANATION
M-5
Developing Bias (VB) DC
Developing Bias (VB) AC
Image Transfer Bias (+)
Image Transfer Bias ()
Exit Paper Sensor PC3
Power Supply Cooling Full speed Fan Motor M4 Speed reduction
Fusing Cooling Fan Motor M3
Full speed Speed reduction
4021M510CA
5.
WATCHDOG FUNCTION (CPU OVERRUN MONITOR)
· The watchdog function, or CPU overrun monitor function, monitors whether any of the CPUs mounted in the copier overruns. · If the function detects that a CPU overruns, the copier automatically resets the CPU, thereby restarting the logic circuit and mechanism.
5-1.
Watchdog Function Post-Processing
The following processing is performed if a faulty condition is detected in the CPU. When the copier CPU is found faulty: · All CPUs are reset and the system is restarted. · If the CPU is found faulty during a copy cycle, the system attempts to feed all sheets of paper out of the copier before restarting. (If paper is left inside the copier, the copier detects it as a misfeed as it is restarted.)
M-6
6.
IMAGE STABILIZATION SYSTEM
Purpose Means Control The Vg/Vb control voltage is varied to bring Vg/Vb to an appropriate level according to the following settings. · Tech. Rep. Choice: ID Adjustment · Tech. Rep. Choice: VG Adjustment · User's Choice: Print Density · IU Life Counter · Paper type The image transfer output is varied to bring the image transfer current to an appropriate level according to the following conditions. · Paper type · Paper width · B/W ratio of image
The following image stabilization controls are provided to ensure stabilized copy image.
To stabilize image density.
Vg/Vb control
To stabilize image transfer.
Image transfer output control
4021M066CA
M-7
7.
IMAGING UNIT (I/U)
· The IU integrates the PC Drum, Developing Unit, PC Drum Charge Corona, and the PC Drum Cleaning Mechanism, all in one body.
PC Drum
PC Drum Cleaning Mechanism
4021M006AB
PC Drum Charge Corona
Developing Unit
4021M007AB
M-8
7-1.
Imaging Unit (IU) Drive Mechanism
· The IU is driven by the Main Motor.
4021M008AB
Main Motor M1
Elevtrical Component M1
Control Signal PWB-A PJ7A-5 PWB-A PJ7A-7
Forward Backward Rotation Rotation L H L L
OFF H H
Wiring Diagram 17-G
M-9
8.
PC DRUM SECTION
· The PC Drum consists of layers of semiconductive materials placed on an aluminum alloy base, on which an electrostatic latent image is formed. PC Drum
(PC Drum Cross-Section) Charge Transport Layer Charge Generation Layer
1167M007AA
Aluminum Base
1139M007AA
8-1.
PC Drum Drive Mechanism
· The PC Drum is rotated by drive from a motor. PC Drum
Main Motor M1
4021M009AA
Elevtrical Component M1
Control Signal PWB-A PJ7A-5 PWB-A PJ7A-7
Forward Rotation L H
OFF H H
Wiring Diagram 17-G
M-10
8-2.
Grounding of the PC Drum
· The potential on the surface of the PC Drum exposed to the light is grounded to the frame.
PC Drum
Frame
Ground Plate
4021M010AA
M-11
9.
PC DRUM CHARGING SECTION
· The PC Drum Charge Corona has a scorotron grid to deposit a charge evenly across the surface of the PC Drum. · The corona unit has a comb electrode that discharges only toward the grid mesh, thus minimizing the amount of ozone produced.
Comb Electrobe
Grid Mesh
4021M011AA
Elevtrical Component HV1
Control Signal PWB-A PJ8A-8
ON L
OFF H
Wiring Diagram 5-C
M-12
10. IMAGE READING SECTION
1 2
6
3 5
4
4021M012AB
1. Scanner /Motor M5 2. CCD Board PWB-J 3. Size Reset Switch S10
4. Scanner 5. 2nd/3rd Mirrors Carriage 6. Scanner Home Position Sensor PC6
M-13
10-1.
Image Processing Process
1. Photoelectric Conversion · Light reflected off the original is read by the CCD Sensor which converts the data to a corresponding analog signal. 2. Analog-to-Digital Conversion · The analog signal output from the CCD Sensor is converted to a corresponding 8-bit digital signal. 3. Shading Correction · An error is corrected that occurs due to variations in sensitivity of each CCD chip and the light distribution varying along the length of the Exposure Lamp. · The data obtained through actually illuminating the shading sheet with the Exposure Lamp is compared with the shading sheet reading reference value (white = max. data value) to make the necessary correction. 4. Zoom Processing · The synchronous timing of the input data (read) and output data (read) is varied to decrease (reduction) or increase (enlargement) the number of data readings, thereby reducing or enlarging the image in the main scanning direction. 5. Data is sent to the PH.
M-14
10-2.
Exposure Components Section
1 2
4021M013AA
3
1. Auxiliary Reflector When a book or other bound original is copied, the paper in the area near the binding generally fails to come flush against the glass, so that the copy of these areas is generally too dark. The Auxiliary Reflector reduces this problem by reflecting light from the Exposure Lamp onto these areas of the original. 2. Exposure Lamp LA2 A fluorescent lamp is used to illuminate the original. 3. 1st Mirror Directs the light reflected off the original to the 2nd Mirror.
M-15
10-3.
(1)
Scanner and Mirrors Carriage Movement Mechanism
Scanner Movement Mechanism
· The Scanner is driven by the Scanner Motor. (2) 2nd/3rd Mirrors Carriage Movement Mechanism
· The 2nd/3rd Mirrors Carriage moves at a speed half that of the Scanner, thereby keeping constant the optical path length between the original and the CCD Board.
Scanner Motor M5
CCD Board PWB-J
Scanner
2nd/3rd Mirrors Carriage
4021M014AB
M-16
10-4.
Scanner Motor Drive Control
· The speed at which the Scanner is moved is controlled by varying the period of the motor drive pulse that is timed with the reference clock.
High Speed
Low Speed Period · The distance over which the Scanner travels is controlled by the number of motor drive pulses that correspond to each paper size and zoom ratio. Elevtrical Component M5 Control Signal PWB-C JP5C-1 to 4 ON OFF Wiring Diagram 11-B
Pulse output
M-17
11. MEMORY STORAGE IMAGE PROCESSING SYSTEM
· Based on the image data output from the IR, a laser light is projected onto the surface of the PC Drum to form a corresponding latent image.
PH Unit
4021M015AA
M-18
11-1.
Laser Exposure Process
1. The Start key is pressed. 2. The laser diode is forced to turn ON and the laser intensity is automatically adjusted. 3. The SOS Sensor Board is illuminated by the laser beam, which generates an SOS signal. 4. The SOS signal determines the laser emission timing for each main scanning line. 5. The surface of the PC Drum is illuminated by the laser beam corresponding to the image data, which forms an electrostatic latent image.
Polygon Motor M2 LD Board PWB-B SOS Mirror
PC Drum SOS Board
4021M016AA
PC Drum
SOS Mirror
SOS Sensor
SOS Signal D C B A
1171M038AA
A to B: LD activation B to C: LD OFF C to D: Laser beam exposure area according to the image data
Elevtrical Component M2
Control Signal PWB-A PJ13A-3
ON L
OFF H
Wiring Diagram 8-D
M-19
12. DEVELOPING UNIT SECTION
The Developing Unit agitates and triboelectrically charges toner so that it sticks to the electrostatic latent image formed on the surface of the PC Drum, then changing the image to a visible, developed one.
1
2
3
4 14
5
6 7
8
4021M017AA
13
12
11
10
9
1. 2. 3. 4. 5. 6. 7.
Spent Toner Recycling Coil PC Drum Charge Corona Spent Toner Conveying Screw 2 Cleaning Blade Spent Toner Conveying Screw 1 PC Drum Paper Separator Finger PC Drum Protective Shutter
8. PC Drum 9. Sleeve/Magnet Roller 10. 1st Toner Conveying Roller 11. ATDC Sensor UN1 12. 2nd Toner Conveying Roller 13. 3rd Toner Conveying Roller 14. Spent Toner Recycling Duct
M-20
12-1.
Developing Unit Drive Mechanism
The rollers are driven through a gear train from the motor.
1st Toner Conveying Roller Sleeve/Magnet Roller
Main Motor M1
2nd Toner Conveying Roller
4021M008AB
3rd Toner Conveying Roller
Elevtrical Component M1
Control Signal PWB-A PJ7A-5 PWB-A PJ7A-7
Forward Rotation L H
OFF H H
Wiring Diagram 17-G
M-21
12-2.
Sleeve/Magnet Roller
· The Sleeve/Magnet Roller, which consists of an outer sleeve roller and an inner magnet roller, conveys developer to the point of development. · The magnetic force of the magnet roller at the point of development is the strongest so that the developer brush stands straight up to deliver the greatest amount of toner to the point of development. Sleeve/Magnet Roller PC Drum
Sleeve/Magnet Roller
1171M027AA 4021M062AA
1st Toner Conveying Roller
12-3.
· · · ·
Developing Bias
Vb (-DC, AC) is applied to the Sleeve/Magnet Roller. Vb (-DC) is applied to prevent toner from sticking to the background of the image. Vb (AC) is applied to enhance good separation of toner from carrier. The amount of toner sticking to the surface of the PC Drum is varied according to the difference in potential between the voltage (Vi) on the surface of the PC Drum and Vb (-DC). Large difference = A greater amount of toner sticks. Small difference = A smaller amount of toner sticks. PC Drum
Sleeve/Magnet Roller
Developing Bias Terminal
4021M018AB
Elevtrical Component Vb (-DC) Vb (AC)
Control Signal PWB-A PJ8A-9 PWB-A PJ8A-10
ON L L
OFF H H
Wiring Diagram 6-B
M-22
12-4.
ATDC Sensor
The ATDC Sensor detects the toner-to-carrier ratio (T/C) of the developer in the Developer Mixing Chamber.
2nd Toner Conveying Roller
4021M019AA
ATDC Sensor UN1
(1)
ATDC Sensor Automatic Adjustment
The reference value for the ATDC Sensor is automatically adjusted as detailed below using the ATDC Sensor Automatic Adjustment mode.
With the copier set in the ATDC Sensor Automatic Adjustment mode, press the Start key.
The developer is mixed.
The ATDC Sensor converts the reference T/C (14 %) to a corresponding voltage value and outputs it.
Does the output voltage fall within the range from 2.36 to 2.44 V? YES The voltage input to the ATDC Sensor from the Master Board at this time is fixed as the reference voltage. NO The voltage input to the ATDC Sensor from the Master Board is varied. 2.45 V or more: Decrease the voltage. 2.35 V or less: Increase the voltage.
M-23
12-5.
Toner Replenishing Mechanism
· Toner is supplied from the Toner Bottle to the Developer Mixing Chamber. 1. The coupling is turned by the motor, which turns the Toner Bottle. 2. To regulate the amount of toner supplied from the Toner Bottle, there is a Metering Chamber provided in the outer race of the coupling. 3. When the Toner Bottle turns, toner in the Metering Chamber drops. 4. Toner from the metering chamber is conveyed by the Toner Conveying Screw into the Developer Mixing Chamber. 5. The Toner Conveying Screw is turned by the motor. coupling Toner Bottle
Metering Chamber
4021M020AB
4021M021AB
Toner Conveying Screw
4021M022AA
Developer Mixing Chamber
4021M023AA
Elevtrical Component M6
Control Signal PWB-A PJ19A-6
ON L
OFF H
Wiring Diagram 4-B
M-24
12-6.
· · · ·
Toner Replenishing Control
Replenishing of the supply of toner is determined based on the T/C ratio and B/W ratio. If T/C is 14 % or more, toner replenishing is not carried out regardless of the B/W value. If T/C is less than 14 %, toner replenishing is determined according to the B/W value. Toner is replenished until T/C becomes 14 %. T/C ratio (%) More than 14 13.5 to 14 13 to 13.5 12.5 to 13 12 to 12.5 10 to 12 Less than 7 B/W ratio -- More than 2000 More than 1000 More than 500 More than 500 More than 0 toner replenishing not supply supply supply supply supply supply
Proceeds to the T/C recovery mode
The greater the value of B/W in the table, the higher the B/W ratio (high image density original).
M-25
12-7.
T/C Recovery Mode
The machine enters the T/C recover mode when a T/C of 10 % or less is detected. Toner is replenished for 90 sec.
T/C is recovered by 1 % or more.
T/C is not recovered by 1 % or more, or T/C is less than 12 %.
Toner is replenished for 60 sec.
T/C is recovered by 2 % or more, or is 12 % or more.
T/C is not recovered by 2 % or more, or T/C is less than 12 %.
Toner is replenished for 30 sec. to complete the T/C recovery mode.
A toner-empty condition is detected. T/C is less than 8 %.
A toner-empty-stop condition results and the initiation of any new copy cycle is prohibited. A toner-empty condition is reset when the Front Cover is opened and closed after a T/C of 10 % or more is detected with the supply of toner replenished. A toner-empty-stop condition is reset when the Front Cover is opened and closed after a T/C of 8 % or more is detected with the supply of toner replenished. A toner-empty condition results, however, if T/C falls within the range between 8 % and 10 % when the Front Cover is opened and closed.
M-26
12-8.
Toner Bottle Home Position Detection Mechanism
· The Toner Bottle is at its home position (where it remains stationary) when its Toner Supply Port faces up. This position is detected by a sensor.
Toner Bottle Home Position Sensor PC7
Toner Supply Port
4021M024AA
Elevtrical Component PC7
Control Signal PWB-A PJ19A-10
Activated Deactivated L H
Wiring Diagram 4-B
M-27
13. PAPER TAKE UP/FEED SECTION
2 1
3 4 5 6
4021M025AA
1. Paper Size Detecting Board PWB-I 2. Paper Size Detecting Sensor S11 3. Paper Empty Sensor PC4
4. Paper Take-Up Roll 5. Separator Roll 6. Paper Lifting Plate
M-28
13-1.
Drawer In Position Detection
· When the drawer is slid into the copier, the light blocking plate blocks the Set Sensor. The copier then knows that the drawer has been slid in position.
Drawer Set Sensor PC5
4021M026AA
Elevtrical Component PC5
Control Signal PWB-A PJ15A-10
Activated Deactivated L H
Wiring Diagram 1-I
13-2.
Paper Empty Detection Mechanism
· The Paper Empty Sensor detects a paper-empty condition in the drawer.
Paper Empty Sensor PC4
1167M073AD
Elevtrical Component PC4
Control Signal PWB-A PJ6A-6
Activated Deactivated L H
Wiring Diagram 1-I
M-29
13-3.
Paper Lifting Plate
· The Paper Lifting Plate is locked into position when it is pressed down. It is unlocked when the tray is slid into the unit. · The Paper Lifting Plate is pushed upward by the Paper Lifting Springs at all times. Paper Lifting Plate Spring
4021M063AA
13-4.
Universal Tray Paper Size Detection Mechanism
· Both the width (in the crosswise direction) and length (in the feeding direction) of the paper are detected and the copier CPU determines the paper size based on the combination of the two readings. · The width (CD) of the paper is detected when the lever that is operatively connected to the Edge Guide activates or deactivates the Paper Size (CD) Detection Sensor. · The length (FD) of the paper is detected when the lever that is operatively connected to the Trailing Edge Stop actuates or deactuates the switches on the Paper Size (FD) Detection Board. Paper Size Detecting Board PWB-I Paper Size Detecting Sensor S11
1
2
3
4
4011M009AA
M-30
Paper Size Detecting Board PWB-I SW1 -- -- -- -- -- -- -- -- ON ON ON SW2 -- -- -- -- -- ON ON ON -- ON ON SW3 -- -- -- ON ON -- ON ON -- -- ON SW4 -- -- ON ON ON -- ON ON -- -- ON
Paper Size Detecting Sensor S11 -- Activated Activated -- Activated -- -- Activated -- -- --
Paper Size B4L, 8-1/2 × 14 11 × 14 A3L, 11 × 17 A5L, 5-1/2 × 8-1/2 L A4C, 8-1/2 × 11 C A5C, 5-1/2 × 8-1/2 C A5L, 5-1/2 × 8-1/2 L A4C, 8-1/2 × 11 C FLS FLS A4L, 8-1/2 × 11 L
Elevtrical Component PWB-I SW1 PWB-I SW2 PWB-I SW3 PWB-I SW4 Elevtrical Component S11
Control Signal PWB-A PJ15A-1 PWB-A PJ15A-2 PWB-A PJ15A-3 PWB-A PJ15A-4 Control Signal PWB-A PJ15A-7
ON L L L L
OFF H H H H
Wiring Diagram
2-H
Activated Deactivated H L
Wiring Diagram 1-H
M-31
13-5.
Paper Take Up Mechanism
· Drive for the paper take-up sequence is transmitted via the Paper Take-Up Solenoid from a motor. Main Motor M1
Paper Take-Up Roll
Paper Take-Up Solenoid SL1 (1) Paper Separating Mechanism
4021M027AA
· The coefficient of friction between the Paper Take-Up Roll and Separator Roll is effectively used to prevent double feed of paper. When one sheet of paper is taken up:The coefficient of friction on the front side of the sheet of paper taken up and fed through the space between the Paper Take-Up Roll and Separator Roll is the same as that on the backside of the sheet of paper, allowing the paper to be properly fed into the machine. When two or more sheets of paper are taken up:The coefficient of friction between the paper and the Separator Roll is greater than that between the sheets of paper, which allows only the top sheet of paper to be fed into the machine.
Paper Paper Take-Up Roll Separator Roll
4021M060AB
M-32
13-6.
Paper Take Up Control
Start Key ON
Main Motor M1
ON OFF ON OFF H L
4021M515CA
Paper Take-Up Solenoid SL1
Synchronizing Roller Sensor PC1
Elevtrical Component M1
Control Signal PWB-A PJ7A-5 PWB-A PJ7A-7 Control Signal PWB-A PJ5A-2 Control Signal PWB-A PJ6A-3
Forward Rotation L H ON L
OFF H H OFF H
Wiring Diagram 17-G
Elevtrical Component SL1 Elevtrical Component PC1 (1)
Wiring Diagram 1-I Wiring Diagram 1-F
Activated Deactivated L H
Paper Take Up Retry Control
· To minimize the occurrence of a paper misfeed, the paper take-up sequence is temporarily halted if the paper fails to reach the Synchronizing Roller Sensor within a given period of time after the sequence has been started. The paper take-up sequence is then performed again. These paper take-up sequences are repeated a given number of times. No. of Paper Take-Up Retry Sequences Paper Take-Up Retry 2
1st Paper Take-Up Retry Sequence Paper Take-Up Solenoid SL1 ON OFF H L Successful paper take-up
4021M514CA
Synchronizing Roller Sensor PC1
M-33
14. MANUAL BYPASS SECTION
14-1. Paper Take Up Drive Mechanism
· Drive for paper take-up from the Manual Bypass is transmitted from a motor via the Solenoid. Main Motor M1
Manual Feed Paper Sensor PC2
Manual Bypass Solenoid SL2
4021M028AA
14-2.
Paper Detection Mechanism
· The Sensor detects a sheet of paper on the Manual Bypass.
Manual Feed Paper Sensor PC2
Paper
4021M061AA
4021M029AA
M-34
14-3.
Manual Feed Take Up Control
Paper Set Manual Feed Paper Sensor PC2 Main Motor M1 Manual Bypass Solenoid SL2 H L ON OFF ON OFF
Start Key ON
Paper drawing-in sequence completed
4021M511CA
Elevtrical Component M1
Control Signal PWB-A PJ7A-5 PWB-A PJ7A-7 Control Signal PWB-A PJ4A-2 Control Signal PWB-A PJ4A-5
Forward Rotation L H ON L
OFF H H OFF H
Wiring Diagram 17-G
Elevtrical Component SL2 Elevtrical Component PC2
Wiring Diagram 1-B Wiring Diagram 1-A
Activated Deactivated L H
M-35
15. MULTIPLE BYPASS SECTION
1 2
3 1. Paper Take-Up Roll 2. Multiple Bypass Solenoid SL21
4021M031AA
3. Multiple Bypass Paper Empty Sensor PC21
15-1.
Paper Take Up Drive Mechanism
· Drive for paper take-up from the Multiple Bypass is transmitted from a motor via the Solenoid.
Main Motor M1
Multiple Bypass Solenoid SL21
Paper Take-Up Roll
Multiple Bypass Paper Empty Sensor PC21
4021M032AA
M-36
15-2.
Paper Take-Up Mechanism
· The Paper Lifting Plate is raised to press the paper stack on the tray up against the Paper Take-Up Roll. · The Paper Lifting Plate is raised and lowered in time with a paper take-up sequence. · The ascent and descent motion of the Paper Lifting Plate is accomplished when the drive from the motor is transmitted to the cam through a solenoid to rotate the cam. Drive from Main Motor Multiple Bypass Solenoid SL21
Paper Take-Up Roll
Cam
4021M033AA
Main Motor (M1) is energized. Paper Take-Up Roll is turned. Multiple Bypass Solenoid (SL21): Energized Cam: Rotates Tray: Raised
Paper Take-Up Roll Cam Paper
Tray Multiple Bypass Solenoid (SL21): Deenergized Paper take-up Multiple Bypass Solenoid (SL21): Energized Cam: Rotates
4021M059AA
Tray: Lowered Multiple Bypass Solenoid (SL21): Deenergized
M-37
15-3.
Paper Empty Detection Mechanism
· The Paper Empty Sensor detects a sheet of paper on the Multiple Bypass.
Multiple Bypass Paper Empty Sensor PC21
Paper
4021M034AA
4021M035AA
15-4.
Paper Take Up Control
Paper Set Start Key ON Multiple Bypass Paper Empty Sensor PC21 Main Motor M1 Multiple Bypass Solenoid SL21 H L ON OFF ON OFF
4021M512CA
Elevtrical Component M1
Control Signal PWB-A PJ7A-5 PWB-A PJ7A-7 Control Signal PWB-A PJ4A-2 Control Signal PWB-A PJ4A-5
Forward Rotation L H ON L
OFF H H OFF H
Wiring Diagram 17-G
Elevtrical Component SL21 Elevtrical Component PC21
Wiring Diagram 17-F Wiring Diagram 17-F
Activated Deactivated L H
M-38
15-5.
Paper Take Up Retry Control
· To minimize the occurrence of a paper misfeed, the paper take-up sequence is temporarily halted if the paper fails to reach the Synchronizing Roller Sensor within a given period of time after the sequence has been started. The paper take-up sequence is then performed again. These paper take-up sequences are repeated a given number of times. No. of Paper Take-Up Retry Sequences Paper Take-Up Retry 2
1st Paper Take-Up Retry Sequence Multiple Bypass Solenoid SL21 Synchronizing Roller Sensor PC1 ON OFF H L Successful paper take-up
4021M516CA
M-39
16. IMAGE TRANSFER AND PAPER SEPARATION SECTION
Image Transfer · A positive charge is applied to the Image Transfer Roller to transfer the toner image formed on the surface of the PC Drum onto the paper. · The charge applied to the Image Transfer Roller is varied according to the following conditions to ensure that image transfer efficiency is stabilized. Paper Type: The amount of charge is made less for OHP transparencies. Paper width: The greater the paper width, the more the amount of charge. B/W ratio of the image: The higher the B/W ratio, the more the amount of charge. · A negative charge is applied to the Image Transfer Roller to return toner sticking to the Image Transfer Roller to the PC Drum. It is performed in the following timings: · A copy cycle is started and completed, The Power Switch is turned ON, A misfeed or a malfunction is reset. Paper Separation · The PC Drum Paper Separator Fingers mechanically separate paper from the surface of the PC Drum to ensure good and positive paper separation. · The Charge Neutralizing Plate is used to neutralize any charge left on the paper, to which image has been transferred, thereby preventing discharge noise that occurs when paper is separated.
PC Drum Paper Separator Fingers PC Drum
Charge Neutralizing Plate
4021M037AA
Image Transfer Roller
Elevtrical Component HV1
Control Signal PWB-A PJ8A-8
ON L
OFF H
Wiring Diagram 6-C
M-40
17. PC DRUM CLEANING SECTION
· The Cleaning Blade is used to scrape residual toner off the surface of the PC Drum. · The spent toner is conveyed through the Recycling Duct and eventually back to the Developer Mixing Chamber. · To prevent paper dust from being compacted on the edge of the Cleaning Blade, the PC Drum is turned backward (by turning the Main Motor backward) when the cumulative time through which the PC Drum has turned reaches a predetermined value. When the PC Drum is turned backward, a backlash in gears prevents drive from being transmitted to other drive mechanisms. Cumulative Time Through Which PC Drum Has Been Driven Approx. 330 sec PC Drum Backward Rotation Time 50 ms
Spent Toner Conveying Screw 1
Spent Toner Conveying Screw 2 PC Drum
4021M039AA
Spent Toner Recycling Coil
Spent Toner Recycling Duct
Cleaning Blade
4021M038AB
M-41
18. MAIN ERASE SECTION
· Any potential remaining on the surface of the PC Drum is neutralized by both light from the Main Erase and a negative voltage applied by the Charge Neutralizing Sheet. · A negative charge is applied to the Charge Neutralizing Sheet to neutralize a positive charge on the surface of the PC Drum. The Main Erase then illuminates the surface of the PC Drum to neutralize the charge left on it.
Main Erase LA1 Charge Neutralizing Sheet
PC Drum
4021M040AA
Elevtrical Component LA1
Control Signal PWB-A PJ7A-12
ON L
OFF H
Wiring Diagram 4-A
M-42
19. FUSING UNIT SECTION
· The Fusing Unit fixes permanently the developed image to the paper by applying heat and pressure to the toner and paper.
1
2
4 3
10
5
9 8
4021M041AD
7
6
1. 2. 3. 4. 5.
Paper Exit Roller Transport Roller Fusing Paper Separator Finger Exit Paper Sensor PC3 Right Fusing Roller
6. Pressure Spring 7. Fusing Heater Lamp H1 8. Thermistor TH1 9. Thermoswitch TS1 10. Left Fusing Roller
M-43
19-1.
Fusing Unit Drive Mechanism
· The Fusing Unit is driven by a motor.
Main Motor M1
Left Fusing Roller
Right Fusing Roller
4021M042AA
19-2.
Fusing Rollers Pressure Mechanism
· To ensure that there is a certain width of area of contact between the Right and Left Fusing Rollers, a pressure spring is used to press the Lower Fusing Roller up against the Upper Fusing Roller.
Right Fusing Roller
Left Fusing Roller
4021M043AA
Pressure Spring
M-44
19-3.
Fusing Temperature Control
· The Fusing Roller Heater Lamp is turned ON and OFF to keep a set temperature on the surface of the Fusing Roller. · The Fusing Roller surface temperature is detected by using a thermistor that translates the temperature to a corresponding electrical signal. · If the Fusing Roller temperature becomes excessively high, the Fusing Roller Heater Lamp is shut down. (°C) 200 190 180
Warm-up completed 170
155
30 sec. or less
Mode 1 5 min
Mode 2 1 min
Mode 3
4021M513CA
Machine Condition or Paper Type Standby Plain paper (width 251 mm or more) Plain paper (width 250 mm or less) Thick paper (width 251 mm or more) Thick paper (width 250 mm or less) OHP transparencies (width 251 mm or more) OHP transparencies (width 250 mm or less) Elevtrical Component H1 Control Signal PWB-A PJ10A-7
Mode 1 180 °C 190 °C 160 °C 210 °C 200 °C 180 °C 155 °C ON L OFF H
Mode 2 180 °C 170 °C 190 °C 170 °C 160 °C 210 °C 190 °C 200 °C 190 °C 180 °C 165 °C 155 °C
Mode 3 170 °C 170 °C 160 °C 190 °C 190 °C 165 °C 155 °C
Wiring Diagram 1-D
19-4.
CPM Control
· If paper of a small size (width of 250 mm or less) or thick paper is used to run a multicopy cycle, the temperature on the edges of the Fusing Rollers tends to run high, meaning that the temperature of the Fusing Rollers varies among different spots of the rollers. · When the cumulative number of copies made through continuous copy cycles* exceeds 30, the paper take-up interval is made longer, thereby allowing the temperatures of the Fusing Rollers at different spots to be uniform. Continuous copy cycle: Continuous copy cycles run with an interval of 2 min. or less between cycles.
M-45
20. JOB TRAY (JS-202): Option
2
3
4 6 5 7 8
1
4021M045AC
1. 2. 3. 4.
Job Tray Main Board PWB-A Paper Empty Sensor PC35 Full Detecting Sensor PC34
5. 6. 7. 8.
Upper Home Position Sensor PC32 Lower Home Position Sensor PC33 Paper Detecting Board PWB-B Bin Switching Motor M1
M-46
20-1.
Tray Selecting Mechanism
· Paper is fed into either the Exit Tray of the machine or the Job Tray. Either is selected according to the application mode (fax, copier, or printer). · The specific tray in which paper is fed is selected by a motor and a sensor. Upper Home Sensor PC32: Activated Bin Switching Motor M1
Paper
4021M046AB
(M1: Backward Rotation)
Lower Home Sensor PC33: Activated
Paper
Job Tray
4021M047AB
Elevtrical Component M1 Elevtrical Component PC32 PC33
Control Signal PWB-A PJ2A-1 to 4 Control Signal PWB-A PJ4A-3 PWB-A PJ4A-6
ON
OFF
Wiring Diagram 16-A Wiring Diagram 16-B
Pulse output
Activated Deactivated L L H H
M-47
20-2.
Tray-Full Detecting Mechanism
· Tray-full detection is valid only when paper is fed into the Job Tray (Job Tray in the lowered position). · A tray-full condition is detected when the sensor is blocked for a continuous given period of time (approx. 20 sec.). Paper
Full Detecting Sensor PC34 Exit Roller
Job Tray
4021M049AA
Elevtrical Component PC34
Control Signal PWB-A PJ4A-9
Activated Deactivated L H
Wiring Diagram 16-C
20-3.
Job Tray Paper Detecting Mechanism
· If paper is fed into the Job Tray when the machine is in a mode in which paper is fed into the Exit Tray (Job Tray in the raise position), the indicator lamp on the Paper Detecting Board lights to warn the user that there is paper in the Job Tray. · A sensor is provided for detecting paper in the Job Tray. Paper Empty Sensor PC35
Job Tray
4021M051AA
Paper Detecting Board PWB-B
Paper
4021M050AA 4021M052AA
Elevtrical Component PC35
Control Signal PWB-A PJ3A-3
Activated Deactivated L H
Wiring Diagram 18-A
M-48
21. SHIFTING UNIT (OT-103): Option
1 2 3
4021M053AB
1. Main Board PWB-A 2. Home Sensor S31 3. Shift Motor M1
M-49
21-1.
Exit Position Shifting Mechanism
· Paper is fed into the Shifting Unit along a straight path or shifted from the reference straight path position. This exit position shifting mechanism allows different finishing functions offered by the machine (Non-Sort, Sort, and Group) to be effected. · The paper that travels along a straight path is fed straight into the Shifting Unit without being shifted sideways as the Exit Roller turns. Exit Roller
Paper
4021M054AA
· When the trailing edge of the paper transported to the exit section moves past the Fusing Roller, the Shift Motor is energized to move the Transport Roller sideways. · The paper is fed into the Shifting Unit as it is shifted sideways. · The Exit Roller is moved sideways by turning the motor forward or backward. · The Exit Roller is detected at its home position by a sensor.
Shift Motor M1
Paper
4021M055AA
Home Sensor S31
Exit Roller
4021M056AB
M-50
Elevtrical Component M1
Control Signal PWB-A PJ2A-1 to 4
Forward Rotation
Backward Rotation Pulse output
OFF
Wiring Diagram 16-C Wiring Diagram 17-D
Elevtrical Component S31
Control Signal PWB-A PJ3A-3
Activated Deactivated L H
M-51
22. OTHER MECHANISM
22-1.
(1)
Cooling Mechanism
Power Supply Section Cooling Mechanism
· A cooling fan motor draws air from the area around the Power Supply Unit to the outside to prevent the Power Supply Unit temperature from running high. · The cooling fan motor is turned at full speed when the Main Motor turns and at a speed reduction during other timings, thereby making the machine quieter without sacrificing cooling performance.
4021M057AA
Power Supply Cooling Fan Motor M4
Elevtrical Component M4
Control Signal PWB-A PJ19A-1
ON analog voltage output
OFF H
Wiring Diagram 11-I
M-52
(2)
Fusing Section Cooling Mechanism
· A fan motor draws air from the area around the Fusing Unit to the outside to prevent the machine interior temperature from running high. In addition, the fan motor pulls paper being transported up through suction force to help stabilize paper transport. · Ozone produced from the PC Drum Charge Corona is absorbed by the Ozone Filter from the air drawn by a fan motor to the outside. · The fan motor is turned at full speed during a print cycle and at a speed reduction during other timings, thereby making the machine quieter without sacrificing cooling performance. Fusing Cooling Fan Motor M3
Ozone Filter
4021M058AB
Elevtrical Component M3
Control Signal PWB-A PJ10A-4
ON analog voltage output
OFF H
Wiring Diagram 1-C
M-53
1.
SAFETY PRECAUTIONS FOR INSPECTION AND SERVICE
· When performing inspection and service procedures, observe the following precautions to prevent accidents and ensure utmost safety. Depending on the model, some of the precautions given in the following do not apply. · Different markings are used to denote specific meanings as detailed below.
WARNING CAUTION
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices.
· The following graphic symbols are used to give instructions that need to be observed. Used to call the service technician's attention to what is graphically represented inside the marking (including a warning). Used to prohibit the service technician's from doing what is graphically represented inside the marking. Used to instruct the service technician's to do what is graphically represented inside the marking.
1-1.
Warning WARNING
1. Always observe precautions. · Parts requiring special attention in this product will include a label containing the mark shown on the left plus precautionary notes. Be sure to observe the precautions. · Be sure to observe the "Safety Information" given in the Operator's Manual. 2. Before starting the procedures, be sure to unplug the power cord. · This product contains a high-voltage unit and a circuit with a large current capacity that may cause an electric shock or burn. · The product also contains parts that can jerk suddenly and cause injury. · If this product uses a laser, laser beam leakage may cause eye damage or blindness.
P-1
3. Do not throw toner or the toner bottle into a fire. · Do not throw toner or the toner bottle (Imaging Cartridge) into a fire. Toner expelled from the fire may cause burns. 4. Use the specified parts. · For replacement parts, always use the genuine parts specified in the manufacturer's parts manual. Installing a wrong or unauthorized part could cause dielectric breakdown, overload, or undermine safety devices resulting in possible electric shock or fire. · Replace a blown electrical fuse or thermal fuse with its corresponding genuine part specified in the manufacturer's parts manual. Installing a fuse of a different make or rating could lead to a possible fire. If a thermal fuse blows frequently, the temperature control system may have a problem and action must be taken to eliminate the cause of the problem. 5. Handle the power cord with care and never use a multiple outlet. · Do not break, crush or otherwise damage the power cord. Placing a heavy object on the power cord, or pulling or bending it may damage it, resulting in a possible fire or electric shock. · Do not use a multiple outlet to which any other appliance or machine is connected. · Be sure the power outlet meets or exceeds the specified capacity. 6. Be careful with the high-voltage parts. · A part marked with the symbol shown on the left carries a high voltage. Touching it could result in an electric shock or burn. Be sure to unplug the power cord before servicing this part or the parts near it. 7. Do not work with wet hands. · Do not unplug or plug in the power cord, or perform any kind of service or inspection with wet hands. Doing so could result in an electric shock. 8. Do not touch a high-temperature part. · A part marked with the symbol shown on the left and other parts such as the exposure lamp and fusing roller can be very hot while the machine is energized. Touching them may result in a burn. · Wait until these parts have cooled down before replacing them or any surrounding parts. 9. Maintain a grounded connection at all times. · Be sure to connect the ground wire to the ground terminal even when performing an inspection or repair. Without proper grounding, electrical leakage could result in an electric shock or fire. · Never connect the ground wire to a gas pipe, water pipe, telephone ground wire, or a lightning conductor. 10. Do not remodel the product. · Modifying this product in a manner not authorized by the manufacturer may result in a fire or electric shock. If this product uses a laser, laser beam leakage may cause eye damage or blindness.
P-2
11. Restore all parts and harnesses to their original positions. · To promote safety and prevent product damage, make sure the harnesses are returned to their original positions and properly secured in their clamps and saddles in order to avoid hot parts, high-voltage parts, sharp edges, or being crushed. · To promote safety, make sure that all tubing and other insulating materials are returned to their original positions. Make sure that floating components mounted on the circuit boards are at their correct distance and position off the boards.
1-2.
Caution CAUTION
1. Precautions for Service Jobs. · A toothed washer and spring washer, if used originally, must be reinstalled. Omitting them may result in contact failure which could cause an electric shock or fire. · When reassembling parts, make sure that the correct screws (size, type) are used in the correct places. Using the wrong screw could lead to stripped threads, poorly secured parts, poor insulating or grounding, and result in a malfunction, electric shock or injury. · Take great care to avoid personal injury from possible burrs and sharp edges on the parts, frames and chassis of the product. · When moving the product or removing an option, use care not to injure your back or allow your hands to be caught in mechanisms. 2. Precautions for Servicing with Covers and Parts Removed. · Wherever feasible, keep all parts and covers mounted when energizing the product. · If energizing the product with a cover removed is absolutely unavoidable, do not touch any exposed live parts and use care not to allow your clothing to be caught in the moving parts. Never leave a product in this condition unattended. · Never place disassembled parts or a container of liquid on the product. Parts falling into, or the liquid spilling inside, the mechanism could result in an electric shock or fire. · Never use a flammable spray near the product. This could result in a fire. · Make sure the power cord is unplugged before removing or installing circuit boards or plugging in or unplugging connectors. · Always use the interlock switch actuating jig to actuate an interlock switch when a cover is opened or removed. The use of folded paper or some other object may damage the interlock switch mechanism, possibly resulting in an electric shock, injury or blindness.
P-3
3. Precautions for the Working Environment. · The product must be placed on a flat, level surface that is stable and secure. · Never place this product or its parts on an unsteady or tilting workbench when servicing. · Provide good ventilation at regular intervals if a service job must be done in a confined space for a long period of time. · Avoid dusty locations and places exposed to oil or steam. · Avoid working positions that may block the ventilation ports of the product. 4. Precautions for Handling Batteries. (Lithium, Nickel-Cadmium, etc.) · Replace a rundown battery with the same type as specified in the manufacturer's parts manual. · Before installing a new battery, make sure of the correct polarity of the installation or the battery could burst. · Dispose of used batteries according to the local regulations. Never dispose of them at the user's premises or attempt to try to discharge one. 5. Precautions for the Laser Beam. (Only for Products Employing a Laser) · Removing the cover marked with the caution label could lead to possible exposure to the laser beam, resulting in eye damage or blindness. Be sure to unplug the power cord before removing this cover. · If removing this cover while the power is ON is unavoidable, be sure to wear protective laser goggles that meet specifications. · Make sure that no one enters the room when the machine is in this condition. · When handling the laser unit, observe the "Precautions for Handling Laser Equipment." 6. Precautions for storage the toner or imaging cartridge. · Be sure to keep the toner or imaging cartridge out of the reach of children. Licking the imaging cartridge or ingesting its contents is harmful to your health.
1-3.
Other Precautions
· When handling circuit boards, observe the "HANDLING of PWBs". · The PC Drum is a very delicate component. Observe the precautions given in "HANDLING OF THE PC DRUM" because mishandling may result in serious image problems. · Note that replacement of a circuit board may call for readjustments or resetting of particular items, or software installation.
P-4
1-4.
Used Batteries Precautions
ALL Areas CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer's instructions. Germany VORSICHT! Explosionsgefahr bei unsachgemäßem Austausch der Batterie. Ersatz nur durch denselben oder einen vom Hersteller empfohlenen gleichwertigen Typ. Entsorgung gebrauchter Batterien nach Angaben des Herstellers. France ATTENTION Il y a danger d'explosion s'il y a remplacement incorrect de la batterie. Remplacer uniquement avec une batterie du même type ou d'un type équivalent recommandé par le constructeur. Mettre au rebut les batteries usagées conformément aux instructions du fabricant. Denmark ADVARSEL! Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering. Udskiftning må kun ske med batteri af samme fabrikat og type. Levér det brugte batteri tilbage til leverandøren. Finland, Sweden VAROlTUS Paristo voi räjähtää, jos se on virheellisesti asennettu. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hävitä käytetty paristo valmistajan ohjeiden mukaisesti. VARNING Explosionsfara vid felaktigt batteribyte. Använd samma batterityp eller en ekvivalent typ som rekommenderas av apparattillverkaren. Kassera använt batteri enligt fabrikantens instruktion. Norway ADVARSEL Eksplosjonsfare ved feilaktig skifte av batteri. Benytt samme batteritype eller en tilsvarende type anbefalt av apparatfabrikanten. Brukte batterier kasseres i henhold til fabrikantens instruksjoner.
P-5
1-5.
Precautions for Service
· When performing inspection and service procedures, observe the following precautions to prevent mishandling of the machine and its parts. Depending on the model, some of the precautions given in the following do not apply. 1. Precautions Before Service · When the user is using a word processor or personal computer from a wall outlet of the same line, take necessary steps to prevent the circuit breaker from opening due to overloads. · Never disturb the LAN by breaking or making a network connection, altering termination, installing or removing networking hardware or software, or shutting down networked devices without the knowledge and express permission of the network administrator or the shop supervisor. 2. How to Use this Book < DIS/REASSEMBLY, ADJUSTMENT > · To reassemble the product, reverse the order of disassembly unless otherwise specified. < TROUBLESHOOTING > · If a component on a PWB or any other functional unit including a motor is defective, the text only instructs you to replace the whole PWB or functional unit and does not give troubleshooting procedures applicable within the defective unit. · All troubleshooting procedures contained herein assume that there are no breaks in the harnesses and cords and all connectors are plugged into the right positions. · The procedures preclude possible malfunctions due to noise and other external causes. 3. Precautions for Service · Check the ar