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Summary of Contents for Minolta Di181
- Page 1 Di181 SERVICE MANUAL GENERAL...
- Page 2 GENERAL 14413...
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Page 3: Table Of Contents
CONTENTS 1. SAFETY INFORMATION ................. G-1 2. SPECIFICATIONS ................... G-7 3. PRECAUTIONS FOR INSTALLATION ............G-10 3-1. Installation Site ..................G-10 3-2. Power Source ..................G-10 3-3. Grounding ....................G-10 4. PRECAUTIONS FOR USE ................G-11 4-1. To Ensure Optimum Conditions ............... G-11 4-2. - Page 4 17-7.Toner Replenishing Control ..............47 17-8.Toner Supply Hole Covering/Uncovering Mechanism ......48 17-9.Toner Bottle Home Position Detection Mechanism ......... 48 17-10.Toner Bottle Vibration Mechanism ............49 17-11.Toner Empty Detection ................49 18. PAPER TAKE-UP/FEED SECTION ..............50 18-1.Drawer In Position Detection ..............51 18-2.Paper Empty Detection Mechanism ............
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Page 5: Safety Information
CAUTION: The use of controls, adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure. Because of this, Minolta strongly recommends that you operate your copy machine only as described in this documentation. - Page 6 The label shown on page G-3 indicates compliance with the CDRH regulations and must be attached to laser products marketed in the United States. CAUTION: Use of controls, adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure. This is a semiconductor laser.
- Page 7 A laser safety label is attached to the outside of the copy machine as shown below. Laser safety label For Europe CLASS 1 LASER PRODUCT LASER KLASSE 1 PRODUKT For United States MINOLTA CO., LTD 2, Higashiakatsuchi, Yawata-cho, Toyokawa-shi Aichi-ken 442-8585, Japan MANUFACTURED: C1177O080CA THIS PRODUCT COMPLIES WITH 21 CFR CHAPTER I, SUBCHAPTER J.
- Page 8 Label inside copy machine The following laser safety label will be attached inside the copy machine as shown below. Please read the following for your own protection. Caution Opening the cover indicated by the Caution label may expose you to harmful laser radiation which could cause damage or loss of eyesight.
- Page 9 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 only VORSICHT! Explosinsgefahr bei unsachgemäßen austausch der batterie.
- Page 10 ALL Areas CAUTION “Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used IC Package according to the manufacturer’s instructions.” Germany only VORSICHT! Þ”Austausch nur durch denselben oder einen vom Hersteller empfohlenen, gleichwertigen typ. Entsorgung gebrauchter Batterien nach Angaben des Herstellers.
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Page 11: Specifications
SPECIFICATIONS TYPE Desktop (with Stationary Platen) PHOTOCONDUCTOR Organic Photoconductor COPYING SYSTEM Electrostatic Dry Powdered Image Transfer to Plain Paper RESOLUTION 600dpi PAPER FEEDING SYSTEM 3-Way system 1st Drawer: Holds up to 250 sheets of paper 2nd Drawer: Holds up to 250 sheets of paper Multi Bypass Table: 50 sheets of paper... - Page 12 MULTIPLE COPIES 1 to 99 WARMING-UP TIME 30 sec. or less with room temperature of 23 °C and rated power voltage FIRST COPY TIME A4C or 8-1/2” × 11”C: 9.0 sec. or less (in Full Size Mode using 1st Drawer) CONTINUOUS COPY SPEED (copies/min.) Zoom Ratio Zoom Ratio...
- Page 13 ENVIRONMENTAL CONDITIONS Temperature 10 to 30 °C with a fluctuation of 10 °C or less per hour Humidity 15 to 85% RH with a fluctuation of 10% RH or less hour Ambient Illumination 3,000 lux or less Levelness 1° (1.75 mm/100 mm) DIMENSIONS Width..650 mm (25-1/2”) (Copier Only)
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Page 14: Precautions For Installation
PRECAUTIONS FOR INSTALLATION 3-1. 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. ÷... -
Page 15: Precautions For Use
PRECAUTIONS FOR USE 4-1. To Ensure Optimum Conditions ÷ 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. -
Page 16: Handling Of Consumables
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. -
Page 17: Other Precautions
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. -
Page 18: System Options
SYSTEM OPTIONS 1151O007AA 1145M035AA 1177M066AA 1174G003AA 1174G004AA 1. Automatic Document Feeder AF-5 3. Paper Feed Cabinet PF-207 2. Plug-in Counter 4. Paper Feed Cabinet PF-114 G-14... - Page 19 MECHANICAL/ ELECTRICAL 14413...
- Page 20 CONTENTS 1. CROSS SECTIONAL VIEW ................M-1 2. COPY PROCESS .................... M-2 3. DRIVE SYSTEM ....................M-4 4. SEQUENTIAL EXPLANATION ................ M-5 5. PC DRUM SECTION ..................M-6 5-1. PC Drum Drive Mechanism ..............M-6 5-2. Grounding of the PC Drum ..............M-7 6.
- Page 21 11-7.Vertical Transport Drive Mechanism ............M-41 12. MANUAL FEED SECTION ................M-42 12-1.Manual Feed Paper Take Up Drive Mechanism ........M-43 12-2.Manual Bypass Take Up Roll Pressure Mechanism ....... M-44 12-3.Manual Feed Paper Separating Mechanism ........... M-45 12-4.Manual Feed Paper Empty Detection Mechanism ........M-46 12-5.Manual Feed Take Up Control ..............
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Page 22: Cross Sectional View
CROSS SECTIONAL VIEW 1177M001AB 1. Fusing Unit 4. Imaging Unit 2. IR Section 5. 2nd Drawer 3. PH Section 6. 1st Drawer M-18... -
Page 23: Copy Process
COPY PROCESS 1177M028AC 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. - Page 24 9. Paper Feeding ÷ Paper is fed from the drawer. 10. Bypass Paper Feeding ÷ Paper is fed from the Bypass Table. 11. Image Transfer ÷ A DC positive corona emission is applied to the back side of the paper, thereby attracting toner onto the surface of the paper.
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Page 25: Drive System
DRIVE SYSTEM 1177M002AB 1. PC Drum Drive 8. Manual Feed Paper Take-Up Drive 2. Upper Drive Motor M1 9. Paper Take-Up Drive 3. Scanner Motor 10. Suction Belt Drive 4. Toner Replenishing Motor 11. Exit Section Drive 5. Developing Section Drive 12. -
Page 26: Sequential Explanation
SEQUENTIAL EXPLANATION Power Switch ON Start Key ON Ventilation Fan Motor (M9) Full-speed rotation Half-speed rotation Power Supply Unit Cooling Fan Motor (M7) Heater Lamp OFF upon completion of temperature control (H1) Lower Drive Motor (M2) 1st Drawer Paper Take-Up Solenoid (SL2) 1st Drawer Paper Take-Up Sensor (PC55) Transport Roller... -
Page 27: Pc Drum Section
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. Charge Holding Layer PC Drum Carrier Generation Layer Aluminum Base 1139M007AA 1139M006AA 12-1. PC Drum Drive Mechanism The PC Drum is turned by drive from a motor. -
Page 28: 12-2.Grounding Of The Pc Drum
12-2. 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 Ground Plate 1177M010AA M-24... -
Page 29: Pc Drum Charging Section
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. -
Page 30: Ir Section
IR SECTION The IR Section projects light onto the surface of the original and converts the light reflected off the original to a corresponding electrical signal. 1177M018AA 1. Scanner 6. Scanner Drive Cable 2. Exposure Lamp (LA1) 7. Optical Section Cooling Fan Motor (M3) 3. -
Page 31: 14-1.Exposure Components Section
14-1. Exposure Components Section 1177M016AE 1. Reflector: Reflects the light from the Exposure Lamp onto the surface of the original. 2. Exposure Lamp: Illuminates the surface of the original. 3. Inverter: Converts a DC voltage to AC voltage and turns ON the Exposure Lamp. 4. -
Page 32: 14-2.Exposure Lamp Control
14-2. Exposure Lamp Control ÷ The Exposure Lamp is turned ON or OFF by the Exposure Lamp Remote signal output from the Master Board. ÷ It is turned ON or OFF at different timings between when the Power Switch is turned ON and when the Start Key is pressed. -
Page 33: 14-3.Image Processing Process
14-3. Image Processing Process 1. Photoelectric Conversion: PWB-IA 2. Analog Processing: PWB-A 3. ODD/EVEN Synthesis: PWB-A 4. Shading Correction: PWB-A 6. Reflection/Density Conversion: PWB-A 5. Histogram Processing: PWB-IA 7. ηCorrection: PWB-A 8. Magnification Processing: PWB-A 9. MTF Correction: PWB-A 10. IR Density Correction: PWB-A 11. - Page 34 1. Photoelectric Conversion (CCD Sensor) ÷ The Exposure Lamp illuminates the original and the light reflected off the original passes through the mirrors and lens to reach the CCD Sensor which, in turn, converts the optical data to corresponding analog electrical signals. 2.
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Page 35: 14-4.Scanner And Mirrors Carriage Movement Mechanism
14-4. Scanner and Mirrors Carriage Movement Mechanism (1) Scanner Movement Mechanism ÷ The Scanner is driven by the Scanner Motor at a speed appropriate to the set zoom ratio with reference to the speed in the full size mode. ÷ The Scanner is detected at its home position by the Scanner Home Sensor. (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 CCD Sensor. -
Page 36: 14-5.Scanner Motor Drive Control
14-5. 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 1177M059CB ÷ 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. -
Page 37: Original Size Detecting Section
Original Size Detecting Section The original size detecting sensors fixed in the optical section are used to determine the size of the original in the Auto Paper or Auto Size mode. 1177M015AA 1. Size Reset Switch (S108) 5. Original Size Detecting Sensor FD3 2. -
Page 38: 15-2.Original Size Detecting Sensors Locations
15-2. Original Size Detecting Sensors Locations ÷ The original size detecting sensors are located in the following positions to enable them to detect different sizes of the original. Sensors Areas (PC114) (PC116) (PC113) (PC115) Metric Areas Inch Areas Mixed inch/metric Areas : Standard : Optional Original Size Detecting Sensor FD3 PC115... -
Page 39: 15-3.Original Size Detection
15-3. Original Size Detection The Original Size Detecting Board determines the correct original size based on the combi- nation of Size Detecting Sensors that are detecting an original. Metric Area Size Determined LED1 LED2 LED1 LED2 LED1 LED2 LED1 Inch Area Size Determined LED1 LED2... -
Page 40: 15-4.Original Size Detection Timing
15-4. Original Size Detection Timing ÷ Takes size readings: When the Original Cover is raised to an angle of 15° or more (Original Cover Detecting Sensor is unblocked). ÷ Affirms size readings: When the Original Cover is lowered to an angle of 15° or less (Original Cover Detecting Sensor is blocked) and the Size Reset Switch is actuated. -
Page 41: Ph Section
PH SECTION Image data sent from the memory section is corrected and, based on the corrected data, a laser beam is projected onto the surface of the PC Drum to form a corresponding latent image. 1177M009AA 1. Polygon Motor 4. Return Mirror 2. -
Page 42: 16-1.Ph Image Processing Process
16-1. PH Image Processing Process 1. Memory: PWB-A 2. Line Memory: PWB-A 3. Periphery Erasing: PWB-A 4. D/A Conversion: PWB-A 5. Laser Emission: PWB-A M-38... - Page 43 1. Memory ÷ Temporarily stores the image density data to ensure effective image data transfer from the IR to PH. 2. Line Memory ÷ Corrects the difference in data transfer frequency. 3. Periphery Erasing ÷ Erases data in the invalid image areas to prevent the laser beam from striking those unnecessary areas.
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Page 44: 16-2.Laser Exposure Process
16-2. Laser Exposure Process Start key ON Laser Diode is turned ON. The laser beam strikes the SOS Sensor Board and generates an SOS signal. The SOS signal sets a uniform laser-ON timing for each main scanning line. The Master Board generates signals that indicate the laser emission area in the main and sub scanning directions. -
Page 45: Developing Unit Section
DEVELOPING UNIT SECTION The Developing Unit agitates and triboelectrically charges toner so that it is attracted to the electrostatic latent image formed on the surface of the PC Drum, changing the image to a visible, developed one. 1139M015AA 1. PC Drum 4. -
Page 46: 17-1.Developing Unit Drive Mechanism
17-1. Developing Unit Drive Mechanism The rollers and screws are driven through a gear train from the motor. Bucket Roller Developer Mixing Screw Sleeve/Magnet Roller Upper Drive Motor M1 1177M013AA 17-2. 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. -
Page 47: 17-3.Doctor Blade
17-3. Doctor Blade The Doctor Blade controls the height of the developer brush, ensuring that the developer on the Sleeve/Magnet Roller is at a uniform height. Doctor Blade Sleeve/Magnet Roller 1177M061AA 17-4. Developing Bias ÷ A developing bias voltage (Vb) is applied to the sleeve roller to prevent a foggy back- ground on the copy. -
Page 48: 17-5.Atdc Sensor
17-5. ATDC Sensor The ATDC Sensor detects the toner-to-carrier ratio (T/C) of the developer in the Developer Mixing Chamber. Developer Mixing Screw ATDC Sensor UN3 1177M023AB Reference CONTROL SIGNAL WIRING DIAGRAM Voltage PWB-A PJ10A-6 2.5V M-44... -
Page 49: Atdc Sensor Automatic Adjustment
(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. -
Page 50: 17-6.Toner Replenishing Mechanism
17-6. Toner Replenishing Mechanism Toner is supplied from the Toner Bottle to the Sleeve/Magnet Roller. 1. The Toner Replenishing Motor turns the Toner Bottle. 2. A metering chamber provide at the toner supply port regulates the amount of toner to be supplied. -
Page 51: 17-7.Toner Replenishing Control
17-7. Toner Replenishing Control 1. The ATDC Sensor detects the toner-to-carrier ratio of the developer for each copy cycle. 2. It samples the ratio 16 times. If eight or more readings out of the total 16 are lower than the preset T/C, a toner replenishing signal is generated. 3. -
Page 52: 17-8.Toner Supply Hole Covering/Uncovering Mechanism
17-8. Toner Supply Hole Covering/Uncovering Mechanism The Toner Supply Hole is covered to prevent toner from dropping into the inside of the copier when the Imaging Unit is slid out of the copier. Imaging Unit Out of Copier Imaging Unit in Position in Copier Shutter Shutter 1139M026AA... -
Page 53: 17-10.Toner Bottle Vibration Mechanism
17-10. Toner Bottle Vibration Mechanism When the indentations of the Toner Bottle move past the protrusion in the Toner Bottle Holder, the Toner Bottle is vibrated to prevent some of the toner from remaining uncon- sumed in the bottle. Toner Bottle Toner Bottle Holder Indentations 1139M029AA... -
Page 54: Paper Take-Up/Feed Section
PAPER TAKE-UP/FEED SECTION 1177M022AB 1. Inch/Metric Switch S66 7. Vertical Transport Rollers 1 2. Paper Size Detecting Switch 1~4 8. Vertical Transport Rollers 2 S61~S64 9. 2nd Drawer Paper Take-Up Sensor 3. 1st Drawer Set Switch S65 PC56 4. 1st Drawer Paper Take-Up Roll 10. -
Page 55: 18-1.Drawer In Position Detection
18-1. Drawer In Position Detection When the 1st drawer is slid into the copier, it actuates the switch, informing the copier that the drawer has been slid into position. 1177M067AA 1st Drawer Set Switch S65 CONTROL SIGNAL WIRING DIAGRAM PWB-A PJ15A-11 11-D When the 2nd drawer is slid into the copier, the light blocking plate blocks the Set Sensor. -
Page 56: 18-2.Paper Empty Detection Mechanism
18-2. Paper Empty Detection Mechanism The Paper Empty Sensor detects a paper-empty condition in the drawer. Paper Present Paper not Present PC101,102: Blocked PC101,102: Unblocked 1154M036AA PC101: 1st Drawer Paper Empty Sensor PC102: 2nd Drawer Paper Empty Sensor CONTROL SIGNAL Blocked Unblocked WIRING DIAGRAM PC101... -
Page 57: 18-3.Universal Tray Paper Size Detection Mechanism
18-3. 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 combi- nation of the two readings. ÷... - Page 58 CONTROL SIGNAL WIRING DIAGRAM PWB-A PJ15A-1 11-C PWB-A PJ15A-3 11-C PWB-A PJ15A-6 11-D PWB-A PJ15A-9 11-D PWB-A PJ15A-11 11-D PWB-A PJ2A-4 11-E M-54...
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Page 59: 18-4.Paper Take-Up Mechanism
18-4. Paper Take-Up Mechanism Drive for the paper take-up sequence is transmitted via the Paper Take-Up Solenoid from a motor. Paper Take-Up Roll from Lower Drive Motor M2 1st Drawer Paper Take-Up Solenoid SL2 2nd Drawer Paper Take-Up Solenoid SL3 1177M024AA (1) Paper Separating Mechanism A loop is formed in the paper between the Separator Fingers and the Paper Take-Up Roll. -
Page 60: 18-5.Paper Take-Up Roll
18-5. Paper Take-Up Roll Since the paper is wedged in the mechanism when the drawer is slid out of the copier if the Paper Take-Up Roll is round in shape, the roll is semicircular and the circular part of the roll is positioned on top at all times other than take-up. -
Page 61: Paper Take Up Retry Control
(1) 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 Paper Take-Up Detecting Sensor within a given period of time after the sequence has been started. The paper take-up sequence is then per- formed again. -
Page 62: 18-7.Vertical Transport Drive Mechanism
18-7. Vertical Transport Drive Mechanism A motor drives the Vertical Transport Rollers. from Lower Drive Motor M2 Vertical Transport Roller 1 Vertical Transport Roller 2 1177M031AA M-58... -
Page 63: Manual Feed Section
MANUAL FEED SECTION 1177M019AB 1. Manual Feed Empty Sensor PC31 5. Manual Feed Paper Take-Up Solenoid 2. Manual Bypass Separator Roll SL51 3. Manual Bypass Feed Roll 6. Manual Feed Paper Take-Up Clutch 4. Manual Bypass Take-Up Roll CL51 M-59... -
Page 64: 19-1.Manual Feed Paper Take Up Drive Mechanism
19-1. Manual Feed Paper Take Up Drive Mechanism Drive for paper take-up from the Manual Feed Table is transmitted from a motor via the Manual Feed Paper Take-Up Clutch. from Lower Drive Motor M2 Manual Bypass Take-Up Roll Manual Bypass Feed Roll Manual Feed Paper Take-Up Clutch CL51 1177M033AB Manual Bypass Separator Roll... -
Page 65: 19-2.Manual Bypass Take Up Roll Pressure Mechanism
19-2. Manual Bypass Take Up Roll Pressure Mechanism The Manual Bypass Take-Up Roll is raised and lowered by energizing and deenergizing the solenoid. Take-Up Roll Position Paper Stoppers At take-up Down Free At timings other than take-up Locked In Standby Manual Bypass Take-Up Rolls Manual Feed Paper Take-Up Solenoid SL51... -
Page 66: 19-3.Manual Feed Paper Separating Mechanism
19-3. Manual Feed Paper Separating Mechanism The difference in friction coefficient between the Feed Roll and Separator Roll is used to stop the rotation of the Separator Roll for the prevention of double feed. Normal feeding: When only one sheet of paper is taken up, the friction coefficient on the top side of the paper is equal to that on the underside. -
Page 67: 19-4.Manual Feed Paper Empty Detection Mechanism
19-4. Manual Feed Paper Empty Detection Mechanism The Manual Feed Empty Sensor detects a sheet of paper on the Manual Feed Table. Manual Feed Empty Sensor PC31 Manual Bypass Take-Up Roll Actuator 1139M092AA CONTROL SIGNAL Blocked Unblocked WIRING DIAGRAM PC31 PWB-A PJ13A-6A 11-I 19-5. -
Page 68: Transport/Synchronizing Rollers
TRANSPORT/SYNCHRONIZING ROLLERS The Synchronizing Rollers are turned in time with the optical section (Scanner) and trans- port section (paper). Upper Transport Roller Upper Synchronizing Roller 1177M034AA Paper Leading Edge Sensor PC54 Transport Roller Sensor PC51 Lower Transport Roller Lower Synchronizing Roller 20-1. -
Page 69: 20-2.Transport Roller Drive Mechanism
20-2. Transport Roller Drive Mechanism The Transport Roller is driven by a motor through a clutch. 20-3. Synchronizing Roller Drive Mechanism The Synchronizing Roller is driven by a motor through a clutch. Lower Drive Motor M2 Synchronizing Roller Clutch CL1 Transport Roller Clutch CL2 1177M030AA Lower Synchronizing Roller... -
Page 70: 20-4.Transport Drive Control
20-4. Transport Drive Control Start Key ON (M2) Lower Drive Motor Transport Roller Clutch (CL2) OFF Transport Roller Sensor (PC51) Synchronizing Roller Clutch (CL1) OFF Paper Leading Edge (PC54) Sensor 1177M058CB CONTROL SIGNAL WIRING DIAGRAM PWB-A PJ5A-4A PWB-A PJ5A-2A CONTROL SIGNAL Blocked Unblocked WIRING DIAGRAM PC51... -
Page 71: Image Transfer And Paper Separation
IMAGE TRANSFER AND PAPER SEPARATION ÷ The DC corona emission applied by the Image Transfer Corona attracts the toner image formed on the surface of the PC Drum onto the surface of the paper, forming a visible, developed image of the original. ÷... -
Page 72: 21-1.Pc Drum Paper Separator Fingers Section
21-1. PC Drum Paper Separator Fingers Section ÷ The PC Drum Paper Separator Fingers physically peel paper off the surface of the PC Drum. ÷ The PC Drum Paper Separator Fingers are constantly held pressed against the surface of the PC Drum. PC Drum PC Drum Paper Separator Fingers 1174M006AA... -
Page 73: Pc Drum Cleaning Section
PC DRUM CLEANING SECTION The Cleaning Blade scrapes off any toner remaining on the surface of the PC Drum. PC Drum Cleaning Blade 1177M035AA 22-1. Cleaning Blade Moving Mechanism ÷ The Cleaning Blade is moved back and forth while the PC Drum is turning to ensure that all residual toner is scraped cleanly off the surface of the PC Drum, thereby preventing the PC Drum as well as Cleaning Blade from deteriorating. -
Page 74: Main Erase Section
MAIN ERASE SECTION The light from the Main Erase Lamp neutralizes any surface potential remaining on the sur- face of the PC Drum after cleaning. Main Erase Lamp LA2 PC Drum Charge Corona Slit PC Drum 1139M044AA Copier Front Frame Slit 1174M001AA Tungsten-Filament Lamp... -
Page 75: Transport Section
TRANSPORT SECTION ÷ Rotation of the Suction Fan Motor results in the paper separated from the PC Drum being drawn onto the turning Suction Belts. ÷ The Suction Belts are driven by a motor. Lower Drive Motor M2 Suction Fan Motor M4 Suction Belt 1177M027AB CONTROL SIGNAL... -
Page 76: Fusing Unit Section
FUSING UNIT SECTION The Fusing Unit fixes permanently the developed image to the paper by applying heat and pressure to the toner and paper. 1174M002AA 1. Upper Fusing Roller 5. Lower Fusing Roller 2. Fusing Heater Lamp H1 6. Cleaning Roller 3. -
Page 77: 25-1.Fusing Unit Drive Mechanism
25-1. Fusing Unit Drive Mechanism The Fusing Unit is driven by a motor. Lower Fusing Roller Upper Fusing Roller 1177M004AA Cleaning Roller Lower Drive Motor M2 25-2. Fusing Rollers Pressure Mechanism To provide pressure and ensure that there is a certain width of area of contact between the Upper and Lower Fusing Rollers, a pressure spring is used to press the Lower Fusing Roller up against the Upper Fusing Roller. -
Page 78: 25-3.Fusing Roller Cleaning Mechanism
25-3. Fusing Roller Cleaning Mechanism The Cleaning Roller is pressed against the Lower Fusing Roller for cleaning the roller. Upper Fusing Roller Lower Fusing Roller Cleaning Roller 1174M003AA M-74... -
Page 79: 25-4.Fusing Temperature Control
25-4. Fusing Temperature Control ÷ The Fusing Roller Heater Lamp is turned ON and OFF to maintain 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. - Page 80 1177M065CB CONTROL SIGNAL WIRING DIAGRAM PWB-A PJ7A-1 CONTROL SIGNAL Low Temp. High Temp. WIRING DIAGRAM PWB-A PJ7A-2 Analog Input M-76...
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Page 81: Other Mechanisms
OTHER MECHANISMS 26-1. Memory Backup ÷ RAM Board connected to the Master Board stores the setting/adjustment values set in the Tech. Rep. modes as well as the counter counts. ÷ A backup battery is mounted on the RAM Board to prevent the contents of memory from being lost when the power cord is unplugged or the RAM Board is removed from the copier. -
Page 82: 26-2.Dehumidifying Mechanism
26-2. Dehumidifying Mechanism (1) PC Drum Dehumidifying ÷ A heater is used to prevent condensation from forming on the surface of the PC Drum due to changes in temperature and humidity. Drum Dehumidifing Heater H2 1174M013AC Power Cord Power Switch Drum Dehumidifying Switch Heater ON conditions CONTROL SIGNAL... -
Page 83: 26-3.Cooling Mechanism
26-3. Cooling Mechanism (1) Optical Section Cooling Mechanism A fan motor draws air from the outside into the copier to cool the IR (especially the CCD Sensor). Optical Section Cooling Fan Motor M3 1177M014AA CONTROL SIGNAL WIRING DIAGRAM PWB-A PJ10A-2 (2) Power Supply Section Cooling Mechanism A 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. -
Page 84: 26-4.Ozone Filter
26-4. Ozone Filter The Ozone Filter absorbs ozone produced by the PC Drum Charge Corona and Image Transfer/Paper Separator Coronas from the air being drawn out of the copier by a fan motor. Cooling Fan Motor M9 PC Drum Charge Corona Duct Image Transfer/Paper Separator Coronas...
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