INDICATION OF WARNING ON THE MACHINE .............S-19 MEASURES TO TAKE IN CASE OF AN ACCIDENT ............S-22 Composition of the service manual ................. C-1 Notation of the service manual ..................C-2 magicolor 1600W/1650EN Main body OUTLINE ........................7 COMPOSITION/OPERATION..................15 Lower Feeder Unit OUTLINE ........................
Because of possible hazards to an inexperienced person servicing this product as well as the risk of damage to the product, Konica Minolta Business Technologies, INC. (hereafter called the KMBT) strongly recommends that all servicing be performed only by KMBT- trained service technicians.
[1] MODIFICATIONS NOT AUTHORIZED BY KONICA MINOLTA BUSINESS TECHNOLOGIES, INC. Konica Minolta brand products are renowned for their high reliability. This reliability is achieved through high-quality design and a solid service network. Product design is a highly complicated and delicate process where numerous mechanical, physical, and electrical aspects have to be taken into consideration, with the aim of arriving at proper tolerances and safety factors.
Page 6
SAFETY AND IMPORTANT WARNING ITEMS [2] POWER PLUG SELECTION In some countries or areas, the power plug provided with the product may not fit wall outlet used in the area. In that case, it is obligation of customer engineer (hereafter called the CE) to attach appropriate power plug or power cord set in order to connect the product to the supply.
SAFETY AND IMPORTANT WARNING ITEMS [3] CHECKPOINTS WHEN PERFORMING ON-SITE SERVICE Konica Minolta brand products are extensively tested before shipping, to ensure that all applicable safety standards are met, in order to protect the customer and CE from the risk of injury.
Page 8
SAFETY AND IMPORTANT WARNING ITEMS Connection to Power Supply WARNING • Check whether the product is grounded properly. If current leakage occurs in an ungrounded product, you may suffer electric shock while operating the product. Connect power plug to grounded wall outlet. Power Plug and Cord WARNING •...
Page 9
SAFETY AND IMPORTANT WARNING ITEMS Power Plug and Cord WARNING • Check whether dust is collected around the power plug and wall outlet. Using the power plug and wall outlet without removing dust may result in fire. • Do not insert the power plug into the wall outlet with a wet hand.
Page 10
SAFETY AND IMPORTANT WARNING ITEMS Installation Requirements Prohibited Installation Places WARNING • Do not place the product near flammable materials or vola- tile materials that may catch fire. A risk of fire exists. • Do not place the product in a place exposed to water such as rain.
Page 11
SAFETY AND IMPORTANT WARNING ITEMS Servicing Inspection before Servicing CAUTION • Before conducting an inspection, read all relevant docu- mentation (service manual, technical notices, etc.) and proceed with the inspection following the prescribed pro- cedure in safety clothes, using only the prescribed tools. Do not make any adjustment not described in the docu- mentation.
Page 12
SAFETY AND IMPORTANT WARNING ITEMS Safety Checkpoints WARNING • When taking a report of problems from a user, check each part and repair properly. A risk of product trouble, injury, and fire exists. • Check the exterior and frame for edges, burrs, and other damages.
Page 13
SAFETY AND IMPORTANT WARNING ITEMS Safety Checkpoints WARNING • Do not remove the cover of the write unit. Do not supply power with the write unit shifted from the specified mount- ing position. The laser light can enter your eye, leading to a risk of loss of eyesight.
SAFETY AND IMPORTANT WARNING ITEMS Handling of Consumables WARNING • Toner and developer are not harmful substances, but care must be taken not to breathe excessive amounts or let the substances come into contact with eyes, etc. It may be stimulative.
Page 15
SAFETY AND IMPORTANT WARNING ITEMS Fuse Fuse CAUTION • CAUTION Double pole / neutral fusing • ATTENTION Double pôle / Fusible sur le neutre Used Batteries Precautions Handling of batteries CAUTION • ALL Areas CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer.
SAFETY AND IMPORTANT WARNING ITEMS [4] LASER SAFETY • This is a digital machine certified as a Class 1 laser product. There is no possibility of danger from a laser, provided the machine is serviced according to the instruction in this manual.
Page 17
SAFETY AND IMPORTANT WARNING ITEMS U.S.A., Canada (CDRH Regulation) • This machine is certified as a Class 1 Laser product under Radiation Performance Stan- dard according to the Food, Drug and Cosmetic Act of 1990. Compliance is mandatory for Laser products marketed in the United States and is reported to the Center for Devices and Radiological Health (CDRH) of the U.S.
Page 18
SAFETY AND IMPORTANT WARNING ITEMS Finland, Sweden LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT VAROITUS! • Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saat- taa altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle laser- säteilylle. puolijohdelaser Laserdiodin suurin teho 20 mW aallonpituus 775 - 800 nm VARNING!
SAFETY AND IMPORTANT WARNING ITEMS Laser Safety Label • A laser safety label is attached to the inside of the machine as shown below. A034P0C502DA S-16...
SAFETY AND IMPORTANT WARNING ITEMS Laser Caution Label • A laser caution label is attached to the outside of the machine as shown below. A034P0C501DA PRECAUTIONS FOR HANDLING THE LASER EQUIPMENT • When laser protective goggles are to be used, select ones with a lens conforming to the above specifications.
SAFETY INFORMATION SAFETY INFORMATION IMPORTANT NOTICE The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Admin- istration implemented regulations for laser products manufactured since August 1, 1976. Compliance is mandatory for products marketed in the United States. This copier is certified as a "Class 1"...
SAFETY INFORMATION INDICATION OF WARNING ON THE MACHINE Caution labels shown below are attached in some areas on/in the machine. When accessing these areas for maintenance, repair, or adjustment, special care should be taken to avoid burns and electric shock. CAUTION •...
Page 23
SAFETY INFORMATION High voltage • This area generates high voltage. Be careful not to touch here when the power is turned ON to avoid getting an elec- tric shock. A034P0C503DA S-20...
Page 24
SAFETY INFORMATION WARNING • Do not burn used Imaging Cartridge. Toner expelled from the fire is dangerous. WARNING • Do not burn used Toner Cartridges. Toner expelled from the fire is dangerous. A034P0504DA CAUTION: • You may be burned or injured if you touch any area that you are advised by any caution label to keep yourself away from.
MEASURES TO TAKE IN CASE OF AN ACCIDENT MEASURES TO TAKE IN CASE OF AN ACCIDENT 1. If an accident has occurred, the distributor who has been notified first must immediately take emergency measures to provide relief to affected persons and to prevent further damage.
Composition of the service manual This service manual consists of Theory of Operation section and Field Service section to explain the main machine and its corresponding options. Theory of Operation section gives, as information for the CE to get a full understanding of the product, a rough outline of the object and role of each function, the relationship between the electrical system and the mechanical system, and the timing of operation of each part.
Notation of the service manual A. Product name In this manual, each of the products is described as follows: (1) magicolor 1600W/magicolor 1650EN Main body (2) Microsoft Windows NT 4.0: Windows NT 4.0 or Windows NT Microsoft Windows 2000: Windows 2000...
Revision history After publication of this service manual, the parts and mechanism may be subject to change for improvement of their performance. Therefore, the descriptions given in this service manual may not coincide with the actual machine. When any change has been made to the descriptions in the service manual, a revised version will be issued with a revision mark added as required.
Page 30
Theory of Operation Ver. 1.0 Nov. 2008 CONTENTS magicolor 1600W/1650EN Main body OUTLINE System configuration....................1 Product specifications ..................... 2 Center cross section ....................6 Media path ......................7 COMPOSITION/OPERATION Overall composition....................9 Control block diagram ................... 9 Image creation process ..................10 Operation sequence ...................
Theory of Operation Ver. 1.0 Nov. 2008 1. System configuration OUTLINE System configuration A. magicolor 1600W A034T1C005AA Main body Dust cover (Option) B. magicolor 1650EN A034T1C004AA Main body Duplex Option (option) Lower Feeder Unit (option) Duplex Option Attachment (Option)
PC drum type OPC (organic photo conductor) Photoconductor Blade cleaning system cleaning magicolor 1600W 1200 x 600 dpi, 600 x 600 dpi Resolution magicolor 1650EN 600 dpi x 600 dpi x 4 bit or 600 dpi x 600 dpi x 1 bit...
Page 36
Theory of Operation Ver. 1.0 Nov. 2008 2. Product specifications B. Functions magicolor 1600W Average 30 seconds Warm-up time magicolor 1650EN Average 45 seconds Plain paper 126.78 mm/second Process speed Thick stock 63.39 mm/second 1-sided: 22 seconds Full color 2-sided: 35 seconds...
Page 37
10 to 35 °C / 50 to 95 °F (with a fluctuation of 10 °C / 18 °F or less per hour) Temperature Humidity 15% to 85% (with a fluctuation of 20% or less per hour) F. Controller (1) magicolor 1600W Type Built-in type controller Standard memory 16 MB Interface USB 2.0 compliant...
Page 38
Theory of Operation Ver. 1.0 Nov. 2008 2. Product specifications (2) magicolor 1650EN Type Built-in type controller Standard memory 256MB USB 2.0 and USB 1.1 compliant, 10Base-T/100Base-TX (IEEE 802.3) Ether- Interfaces • Microsoft Windows Windows Server 2008 Standard/Enterprise/Datacenter, Vista Home Basic/Home Premium/Ultimate/Business/Enterprise, WindowsVista Home Basic /Home Premium /Ultimate/Business /Enterprise x64 Edition, Windows XP Home Edition/Professional (Service Pack 1 or later;...
3. Center cross section Theory of Operation Ver. 1.0 Nov. 2008 Center cross section Imaging cartridge section Fusing section Duplex section* Toner cartridge section Write section Media feed section 2nd transfer section A034T1C001AA Lower Feeder Unit section * *: Only for the magicolor 1650EN...
Theory of Operation Ver. 1.0 Nov. 2008 5. Overall composition COMPOSITION/OPERATION Overall composition Control block diagram Control panel TC/Y TC/M TC/C TC/K Print control board (PRCB) Paper pi ck-up/ MFP board (MFPB) transport Image processing Image process Fusing Power supply/ high voltage Write unit (PH ) Control system line...
6. Interface section Theory of Operation Ver. 1.0 Nov. 2008 Interface section Composition 6.1.1 magicolor 1600W USB port (USB 2.0) A034T2C503AA Type Application USB port (USB 2.0) For PC to printer connection 6.1.2 magicolor 1650EN USB port (USB 2.0) 10Base-T/100Base-TX(IEEE 802.3)
7. Write section (PH section) Theory of Operation Ver. 1.0 Nov. 2008 Operation 7.2.1 Outline • The surface of the photo conductor is irradiated with a laser light and an electrostatic latent image is thereby formed. • The polygon mirror has four faces and the machine uses a two-beam array LD to inhibit the speed of the polygon mirror from increasing.
Theory of Operation Ver. 1.0 Nov. 2008 7. Write section (PH section) 7.2.3 Laser emission area A. Main scan direction (CD) • The print start position in the CD direction is determined by the CD print start signal (/ HSYNC) that is output from the MFP board (MFPB) and the width of the media. •...
Theory of Operation Ver. 1.0 Nov. 2008 8. IMAGEING CARTRIDGE SECTION Drive A034T2C508AA Operation 8.3.1 Imaging cartridge (IC) life control A. New DC detection • The machine attempts to perform a new IC detection sequence when the power switch is turned OFF and ON, or the Front door is closed.
Theory of Operation Ver. 1.0 Nov. 2008 9. Photo conductor section Operation 9.3.1 Photo conductor drive mechanism A. Photo conductor drive • The photo conductor is driven by the Transport motor (M1). 9.3.2 Photo conductor cleaning mechanism • The cleaning blade is pressed up against the surface of the photo conductor, scraping residual toner off the surface.
11. Developing section Theory of Operation Ver. 1.0 Nov. 2008 11.2 Drive Imaging cartridge Transport motor Developing motor A034T2C511AA 11.3 Operation 11.3.1 Toner flow • Toner stored in the hopper is conveyed into the toner supply portion through rotation of the toner cartridge rack.
Theory of Operation Ver. 1.0 Nov. 2008 11. Developing section 11.3.2 Toner Cartridge Rack • The toner cartridge rack is mounted with four toner cartridges. The rack employs a rotary system. • Development of the image of each color of toner is performed by rotating the toner car- tridge rack.
Page 57
11. Developing section Theory of Operation Ver. 1.0 Nov. 2008 B. Toner cartridge rack stop position • The toner cartridge rack must be brought to a stop so that the toner cartridge of each color of toner is located at its correct position. To accomplish this task, three stop posi- tions are established: the standby (reference) position, the developing position, and the cartridge replacement position.
Page 58
Theory of Operation Ver. 1.0 Nov. 2008 11. Developing section (3) Cartridge replacement position • The cartridge replacement position is where the toner cartridge rack is rotated 90° from the developing position. For developing of C 90° Standby position Cartridge replacement position A034T2C517AA C.
Page 59
11. Developing section Theory of Operation Ver. 1.0 Nov. 2008 D. Color printing process (1) Operation sequence 1. The toner cartridge rack is stationary at the standby position. 2. When a print request is received from the controller, the toner cartridge rack is rotated and temporarily stopped at the K developing position.
Page 60
Theory of Operation Ver. 1.0 Nov. 2008 11. Developing section E. Toner cartridge rack stop position detection • The toner cartridge rack stop position for each color of toner is detected by the Rack motor (M2) and the Rack positioning sensor (PS5). •...
Page 61
11. Developing section Theory of Operation Ver. 1.0 Nov. 2008 (1) Toner cartridge rack standby position • The M toner cartridge is provided with a slit for detecting the standby position. • When the toner cartridge rack is rotated, the Rack positioning sensor (PS3) moves past the slit for detecting the standby position.
Theory of Operation Ver. 1.0 Nov. 2008 11. Developing section 11.3.3 Developing Roller drive • The developing roller is driven by the Developing motor (M3) and Intermediate gear. • When the toner cartridge rack is stationery at the developing position, the developing roller drive gear comes into mesh with the Intermediate gear.
11. Developing section Theory of Operation Ver. 1.0 Nov. 2008 11.3.4 Developing bias • The developing bias voltage (Vb) is applied to the developing roller so that an adequate amount of toner is attracted onto the surface of the photo conductor. •...
Theory of Operation Ver. 1.0 Nov. 2008 11. Developing section 11.3.6 Toner cartridge (TC) life control A. Toner cartridge detection and new cartridge detection timing • The machine attempts to perform a detection sequence when the front door is closed. B.
12. 1st transfer section Theory of Operation Ver. 1.0 Nov. 2008 12. 1st transfer section 12.1 Composition A034T2C527AA A034T2C570AA 1st transfer roller Driven roller 2 Transfer belt IDC sensor (IDC) Driven roller 1 Toner collecting screw Cleaning blade Belt positioning sensor (PS6) Waste toner near full sensor (PS7) A034T2C526AA...
12. 1st transfer section Theory of Operation Ver. 1.0 Nov. 2008 12.3 Operation 12.3.1 1st transfer output control • The 1st image transfer roller is not equipped with a pressure/retraction mechanism and presses the transfer belt up against the photo conductor drum. •...
Theory of Operation Ver. 1.0 Nov. 2008 12. 1st transfer section 12.3.3 Cleaning blade pressure/retraction mechanism • In color printing, an image is formed on the transfer belt for each color of toner. The cleaning blade is therefore provided with a pressure/retraction mechanism. •...
Page 69
12. 1st transfer section Theory of Operation Ver. 1.0 Nov. 2008 B. Operation timing Point of contact with the transfer belt Cleaning blade pressure/ retraction solenoid Cleaning blade pressure/ Retraction stop During pressure operation Retraction stop retraction condition Point of contact with the transfer belt Cleaning blade pressure/ retraction solenoid Cleaning blade pressure/...
Page 70
Theory of Operation Ver. 1.0 Nov. 2008 12. 1st transfer section D. Pressure sequence 1. When the Cleaning blade pressure/retraction solenoid (SD5) is energized in the condition, in which the cleaning blade is retracted from the transfer belt, the pres- sure cam rotates a half turn.
12. 1st transfer section Theory of Operation Ver. 1.0 Nov. 2008 12.3.4 Belt Positioning Sensor • When development takes place in this machine, the image of each color of toner is formed on the surface of the transfer belt. The leading edge of the image of each color of toner must therefore be aligned correctly with each other on the surface of the transfer belt.
Theory of Operation Ver. 1.0 Nov. 2008 12. 1st transfer section 12.3.5 ATVC (Auto transfer voltage control) • The ATVC, or Auto transfer voltage control, is for optimizing the transfer output. A con- stant current is made to flow through each of the transfer rollers. From the voltage thereby detected, the resistance of each of the 1st transfer roller, 2nd transfer roller, and transfer belt is measured.
12. 1st transfer section Theory of Operation Ver. 1.0 Nov. 2008 12.3.6 Image stabilization control item • IDC sensor LED intensity control • Transfer belt surface correction control • Control of the maximum amount of toner sticking • Laser intensity adjustment control •...
Theory of Operation Ver. 1.0 Nov. 2008 13. 2ND TRANSFER SECTION/ MEDIA SEPARA- 13. 2ND TRANSFER SECTION/ MEDIA SEPARATION 13.1 Composition 2nd transfer roller 2nd transfer roller Pressure/ Retraction slider A034T2C533AA A034T2C557AA 2nd transfer roller 2nd image transfer pressure/retrac- A034T2C532AA tion solenoid...
Theory of Operation Ver. 1.0 Nov. 2008 13. 2ND TRANSFER SECTION/ MEDIA SEPARA- 13.3 Operation 13.3.1 2nd transfer roller pressure/retraction control • In color printing, the toner image of each color of toner is transferred to the transfer belt (thus a total of four times to cover the four colors of toner). Pressure/retraction control with respect to the transfer belt is therefore provided for the 2nd transfer roller.
13. 2ND TRANSFER SECTION/ MEDIA SEPARATION Theory of Operation Ver. 1.0 Nov. (1) Retraction sequence 1. When the 2nd image transfer pressure/retraction solenoid (SD4) is energized in the condition in which the 2nd transfer roller is pressed against the transfer belt, the Pressure/retraction clutch rotates a half turn.
Theory of Operation Ver. 1.0 Nov. 2008 13. 2ND TRANSFER SECTION/ MEDIA SEPARA- 13.3.3 Neutralization and separation of media • To neutralize the media that has undergone the 2nd transfer process, a Charge neutraliz- ing cloth is provided for the guide plate after the 2nd transfer roller. Charge neutralizing cloth Charge neutralizing cloth 2nd transfer roller...
Theory of Operation Ver. 1.0 Nov. 2008 14. Toner collecting section 14.3 Operation 14.3.1 Toner collecting mechanism • Waste toner scraped off by the cleaning blade of the transfer belt and that scraped off by the cleaning blade of the photo conductor are conveyed by each of the toner collecting screws into the drum cartridge.
14. Toner collecting section Theory of Operation Ver. 1.0 Nov. 2008 14.3.2 Waste toner near full detection system • Waste toner near full and waste toner full conditions are detected through the control performed using the Waste toner near full sensor, toner agitating screw, and the internal counter.
Theory of Operation Ver. 1.0 Nov. 2008 15. Media feed section 15. Media feed section 15.1 Composition Media feed roller A034T2C559AA A034T2C558AA Media feed roller Tray1 media feed solenoid (SD1) A034T2C541AA...
15. Media feed section Theory of Operation Ver. 1.0 Nov. 2008 15.2 Drive Transport motor (M1) Media feed roller Tray1 media feed solenoid (SD1) A034T2C542AA...
Theory of Operation Ver. 1.0 Nov. 2008 15. Media feed section 15.3 Operation 15.3.1 Up/down control A. Up/down operation • When the Tray1 Paper pick-up solenoid (SD1) is energized, drive from the Transport motor (M1) is transmitted to the Pick-up roller via the Paper pick-up clutch. The Pick-up roller is thereby rotated.
15. Media feed section Theory of Operation Ver. 1.0 Nov. 2008 15.3.2 Paper feed control A. Pick-up/separation control • When the Tray 1 media feed solenoid (SD1) is energized, drive from the Transport motor (M1) is transmitted to the pick-up roller via the paper pick-up clutch and the pick-up roller is rotated.
Theory of Operation Ver. 1.0 Nov. 2008 15. Media feed section 15.3.5 Media feed retry function • To reduce the number of media misfeeds detected due to failure to take up and feed in media properly during color printing, another media feed sequence is carried out if the Registration sensor (PS1) is not unblocked and blocked within a predetermined period of time.
Theory of Operation Ver. 1.0 Nov. 2008 16. Fusing section 16.2 Drive Pressure roller Fusing roller Transport motor A034T2C552AA 16.3 Operation 16.3.1 Fusing temperature control • To fuse the toner image on the media (image yet to be permanently fixed) properly into the media, the heater lamps are turned ON and OFF as necessary to bring the fusing temperature to an appropriate level.
16. Fusing section Theory of Operation Ver. 1.0 Nov. 2008 A. Warm-up control Control is provided until the Fusing roller reaches the predetermined level. B. Control start timing • The power switch is turned ON. • A malfunction or media misfeed is reset. •...
Theory of Operation Ver. 1.0 Nov. 2008 16. Fusing section 16.3.3 Print control • To ensure a good fixing level and light transmission performance of the OHP transparen- cies, the fusing speed and fusing roller temperature are controlled. A. Control start timing •...
16. Fusing section Theory of Operation Ver. 1.0 Nov. 2008 16.3.5 PPM control • PPM control is provided to prevent the temperature on edges of the heating roller from increasing during a multi-print cycle using plain media of a small size. •...
Theory of Operation Ver. 1.0 Nov. 2008 17. Media exit section 17. Media exit section 17.1 Composition A034T2C576AA Media exit roller Media exit roll Exit sensor (PS7) A034T2C547AA...
17. Media exit section Theory of Operation Ver. 1.0 Nov. 2008 17.2 Drive Exit roller Transport motor A034T2C546AA 17.3 Operation 17.3.1 Conveyance control A. Reverse/paper exit switch control • The exit roller is driven by the transport motor. • During 1-sided printing, the exit roller rotates in the forward direction and feeds the media transported from the fusing section out onto the media exit tray.
Theory of Operation Ver. 1.0 Nov. 2008 18. Image stabilization control 18. Image stabilization control 18.1 Overview • To ensure that a stabilized output image is produced at all times, the following image sta- bilization controls are provided. Purpose Control Detection ATVC To ensure stabilized transfer...
18. Image stabilization control Theory of Operation Ver. 1.0 Nov. 2008 18.2 Operation 18.2.1 Leak detection control • For the clearance between the photo conductor and developing roller, an optimum devel- oping bias voltage is established that does not result in a leak image or uneven density. 18.2.2 IDC sensor LED intensity control •...
Theory of Operation Ver. 1.0 Nov. 2008 18. Image stabilization control 18.3 Operation timing Mode Operation timing • The environment in which the power switch is turned ON is different from the environ- ment the machine was in when the power switch was turned OFF last. •...
19. Fan control Theory of Operation Ver. 1.0 Nov. 2008 19. Fan control 19.1 Composition DC power supply fan motor (FM1) Suction Exhaust Ozone ventilation fan motor (FM2) A034T2C549AA 19.2 Operation 19.2.1 Function Motor name Function (purpose) To discharge heat stagnant inside the machine to the outside to DC power supply fan motor (FM1) prevent the temperature of the DC power supply from rising.
Theory of Operation Ver. 1.0 Nov. 2008 19. Fan control 19.2.2 Control conditions Motor name Condition Control conditions • For a predetermined period of time after the power is turned ON • For a predetermined period of time after the end of the (high Energy save mode speed)
Page 99
19. Fan control Theory of Operation Ver. 1.0 Nov. 2008 Blank Page...
SERVICE MANUAL THEORY OF OPERATION Lower Feeder Unit 2008.11 Ver. 1.0...
Page 101
Revision history After publication of this service manual, the parts and mechanism may be subject to change for improvement of their performance. Therefore, the descriptions given in this service manual may not coincide with the actual machine. When any change has been made to the descriptions in the service manual, a revised version will be issued with a revision mark added as required.
Page 102
Theory of Operation Ver. 1.0 Nov. 2008 CONTENTS Lower Feeder Unit OUTLINE Product specifications ..................... 1 Type ........................1 Paper type ......................1 Machine specifications..................1 Operating environment ..................1 COMPOSITION/OPERATION Composition ......................3 Drive ........................4 Operation ........................ 5 Conveyance drive mechanism................
Page 103
Theory of Operation Ver. 1.0 Nov. 2008 Blank Page...
Theory of Operation Ver. 1.0 Nov. 2008 1. Product specifications OUTLINE Product specifications Type Name Add-on 500-sheet paper feed cassette Installation Desk type Document alignment Center Paper type Paper size A4S/LetterS Paper type Plain paper: 60 to 90 g/m (16 to 24 lb) Capacity 500 sheets Machine specifications...
Page 105
1. Product specifications Theory of Operation Ver. 1.0 Nov. 2008 Blank Page...
Theory of Operation Ver. 1.0 Nov. 2008 4. Operation Operation Conveyance drive mechanism • The lower feeder unit is not provided with any drive motor. The driving force for media feeding and conveyance (drive from M1) is transmitted through a coupling gear from the printer.
4. Operation Theory of Operation Ver. 1.0 Nov. 2008 Media Empty Detection • The media empty sensor (PS10) of the PC control board (PCCB) detects a media empty condition in the lower feeder unit. • When there is media loaded in the lower feeder unit, the actuator is raised, which unblocks the sensor.
SERVICE MANUAL THEORY OF OPERATION Duplex Unit 2008.11 Ver. 1.0...
Page 111
Revision history After publication of this service manual, the parts and mechanism may be subject to change for improvement of their performance. Therefore, the descriptions given in this service manual may not coincide with the actual machine. When any change has been made to the descriptions in the service manual, a revised version will be issued with a revision mark added as required.
Theory of Operation Ver. 1.0 Nov. 2008 1. Product specifications OUTLINE Product specifications A. Type Name Duplex Option Installation Mounted on the back side of main body Reversing system Exit roller switchback Document alignment Center B. Paper type Paper size A4S/LetterS Paper type •...
Page 115
1. Product specifications Theory of Operation Ver. 1.0 Nov. 2008 Blank Page...
Theory of Operation Ver. 1.0 Nov. 2008 2. Composition COMPOSITION/OPERATION Composition Duplex option Transport roller/1 Registration roller A0VT 2C509AA A0VTT2C501AA Cooling fan motor (FM3) Switchback motor (M5) Transport roller/1 Door sensor (PS14) Transport Sensor/1 (PS15) Transport motor (M6) AD drive board (ADDB) Registration solenoid (SD7) Registration roller Loop sensor (PS13)
Theory of Operation Ver. 1.0 Nov. 2008 3. Drive Drive Duplex option Switchback motor (M5) Transport roller 1 Transport motor (M6) Registration roller A0VT 2C503AA Attachment Transport roller 2 Transport motor (M1) A0VT 2C513AA...
4. Operations Theory of Operation Ver. 1.0 Nov. 2008 Operations Switchback mechanism 4.1.1 Switchback operation • The media exit roller of the main unit is used to subject the 1-sided print to a switchback sequence so that the 1-sided print is to be transported through the duplex option. Exit roller Switchback motor (M5) Feeding the media into duplex option...
Theory of Operation Ver. 1.0 Nov. 2008 4. Operations 4.1.3 Switchback Motor Control • Rotation of the Switchback motor (M5) is controlled by the signal output from the AD drive board (ADDB).
4. Operations Theory of Operation Ver. 1.0 Nov. 2008 Transport and duplex media take-up mechanism 4.2.1 Transport and duplex media take-up operation • Drive for the duplex option is provided by the Transport motor (M6). Transport motor (M6) Transport roller Registration roller A0VT 2C506AA 4.2.2...
Theory of Operation Ver. 1.0 Nov. 2008 4. Operations 4.2.4 Loop correction control • A loop correction mechanism is provided to prevent skew from occurring in the second page. • The Registration solenoid (SD7) is energized after the lapse of a given period of time after the Loop sensor (PS13) has been activated.
4. Operations Theory of Operation Ver. 1.0 Nov. 2008 2-sided printing method • The following two types of 2-sided printing methods are available. 2-sided printing with a single sheet of media resident in the system 2-sided printing method 2-sided printing with two sheets of media resident in the system (When the FD length is no less than 276 mm, no more than 297 mm).
Page 124
Theory of Operation Ver. 1.0 Nov. 2008 4. Operations Operation 4 • The main unit carries out the second print cycle to produce the print image of the first page of the original on the other side of the 1-sided print. Operation 5 •...
4. Operations Theory of Operation Ver. 1.0 Nov. 2008 4.4.2 Operations in 2-sided printing with two sheets of media resident in the sys- Operation 1 Media Exit • The first sheet of media is taken up and fed in from the Roller main unit drawer and the main unit starts the first print cycle to produce the print image of the second page of the...
Page 126
Theory of Operation Ver. 1.0 Nov. 2008 4. Operations Operation 5 • While feeding the first 2-sided print out, main unit produces the print image of the 6th page of the original on the third sheet of media. • The second sheet of media waits at the duplex take-up posi- tion until the third sheet of media is subjected to a switch- back sequence.
Page 127
4. Operations Theory of Operation Ver. 1.0 Nov. 2008 • 2-sided printing of two A4 originals with two sheets of media resident in the sys- Belt Positioning Sensor (PS6) Registration Sensor (PS2) Exit Sensor (PS4) Forward Backward Forward Backward Forward Backward Forward Backward...