kyocera mita km 2550 service manual

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Status: AVAILABLE Last checked: 11 Minutes ago! eBook includes PDF, ePub and Kindle version In order to read or download kyocera mita km 2550 service manual ebook, you need to create a FREE account. ✔ Register a free 1 month Trial Account. ✔ Download as many books as you like (Personal use) ✔ Cancel the membership at any time if not satisfied. ✔ Join Over 80000 Happy Readers kyocera mita km 2550 service manual We have 27 Kyocera KM-2550 manuals available for free PDF download: Command Reference Manual, Service Manual, Technical Reference Manual, Operation Manual, Advanced Operation Manual, User Manual, Basic Operation Manual, Online Manual, Supplementary Manual, Specifications, Manual, Quick Start Manual. Please use the box above to search for any other information.This was our invoice from 1998 purchase of PC-8200 and software. It was on. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Kyocera Km 2550 Service Manual. To get started finding Kyocera Km 2550 Service Manual, you are right to find our website which has a comprehensive collection of manuals listed. Our library is the biggest of these that have literally hundreds of thousands of different products represented. I get my most wanted eBook Many thanks If there is a survey it only takes 5 minutes, try any survey which works for you. Please enable scripts and reload this page. Please turn on JavaScript and try again. Cleaning should be done from time to time to avoid print quality problems. Please check your inbox, and if you can’t find it, check your spam folder to make sure it didn't end up there. Please also check your spam folder. Keep it close to the machine fore easy reference. This chapter explains the following topics: Additional pages may be inserted in future editions. The user is asked to excuse any technical inaccuracies or typographical errors in the present edition. No responsibility is assumed for defects in the printer’s firmware (contents of its read-only memory). Throughout this guide 1650 is referred to as 16 ppm (prints per minute) model, 2050 as 20 ppm (prints per minute) model, and 2550 as 25 ppm (prints per minute) model. All rights are reserved. Any copies made of all or part of this manual, or any copyrightable subject must contain the same copyright notice as the material from which the copying is done. kyocera mita km 2550 service manual, kyocera mita km 2550 service manual pdf, kyocera mita km 2550 service manual download, kyocera mita km 2550 service manual user, kyocera mita km 2550 service manual transmission. IBM Proprinter X24E is a product of International Business Machines Corporation. Epson LQ-850 is a product of Seiko Epson Corporation. Hewlett-Packard, PCL, and PJL are registered trademarks of Hewlett-Packard Company. Centronics is a trade name of Centronics Data Computer Corp. PostScript is a registered trademark of Adobe Systems Incorporated. Macintosh is a registered trademark of Apple computer, Inc. Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation. PowerPC is a trademark of International Business Machines Corporation. ENERGY STAR is a U.S. registered mark. All other brand and product names are registered trademarks or trademarks of their respective companies. After a specified period of time since the last operation the machine remains in a waiting state but enters Lower Power Mode or Auto Sleep Mode and reduces power consumption. This product is equipped with the following features as a result of its compliance with International Energy Star Program standards: The period of time the machine is idle before entering Low Power Mode can be lengthened. For further information refer to Low Power Mode, on page 3-18. The period of time the machine is idle before entering Auto Sleep Mode can be lengthened. For further information refer to Auto Sleep Mode, on page 3- 19. Your Sales or Service Representative can provide information about adding two-sided copying capabilities to this device. For further information refer to Duplex Unit, on page 4-8. Your Sales or Service Representative can provide information about recommended paper types. Keep it close to the machine for easy reference. Also, to ensure correct and safe usage of the machine. Specific points of attention are indicated inside the symbol. Specifics of the prohibited action are indicated inside the symbol. Specifics of the required action are indicated inside the symbol. Take care to avoid fire or electric shock when removing a paper jam or when replacing toner. Do not touch parts in this area, because there is a danger of getting burned. Never touch parts in this area, because there is a danger of electric shock. Do not touch parts in this area, because there is a danger of getting burned. Do not touch parts in this area, because there is a danger of getting burned. Such locations may cause the machine to fall down or fall over. This type of situation presents a danger of personal injury or damage to the machine. If dust or dirt become attached to the power plug, clean the plug to avoid the danger of fire or electrical shock. Leave adequate space, especially around the vents, to allow air to be properly ventilated out of the machine. If, however, the machine is used over a long period of time in a poorly ventilated room or when making an extremely large number of copies, the smell may become unpleasant. To maintain the appropriate environment for copy work, it is suggested that the room be properly ventilated. Avoid multiple connections in the same outlet. These types of situations present a danger of fire or electrical shock. If metallic objects come in contact with the prongs on the plug, it may cause a fire or electric shock. If an earth connection is not possible, contact your Service Representative. The plastic may cling to their nose and mouth causing suffocation. This situation presents a danger of fire or electrical shock should they fall inside. Do not place heavy objects on the cord, pull it, bend it unnecessarily or cause any other type of damage. If the laser beam escapes, there is a danger of it causing blindness. Next, be absolutely certain to remove the power plug from the outlet to avoid the danger of fire or electrical shock. Then contact your Service Representative. If the power cord is pulled, the wires may become If the power cord is damaged, there is a danger of fire or electrical shock. If it will not be used for an extended period of time (vacations, etc. http://schlammatlas.de/en/node/23623 ), remove the power plug from the outlet for safety purposes during the time the machine is not in use. It is therefore recommended that you consult with your Service Representative in regard to cleaning of internal parts. This is particularly effective if accomplished prior to seasons of high humidity. Consult with your Service Dangerous sparks may cause burns. If coughing develops, contact a physician. If necessary, contact a physician. If there is any remaining tenderness, contact a physician. For this reason, laser radiation emitted inside this machine is hermetically sealed within the protective housing and external cover. In the normal operation of the product by a user, no radiation can leak from the machine. Other switches on the equipment are only functional switches and are not suitable for isolating the equipment from the power source. Die anderen Schalter auf dem Gerat sind nur Funktionsschalter und konnen nicht verwendet werden, um den Stromflu.Refer to the guide that corresponds to your particular objective. It also includes basic procedures for using the machine as a copier and printer and has a This Technical This guide is stored on the CDROM as a PDF document. The screens and messages shown in the guide reflect the inch version of the machine. When using the metric version, refer to the messages on your machine. For further information refer Failure to do so may result in a paper jam. After loading paper into a Cassette or Multi-Bypass Tray, seal the remaining paper in its original package. If the machine is not being used for a prolonged period of time, remove all paper from the Cassette(s) and MultiBypass Tray and reseal it in its original packaging. A different For further information refer to Multi-Bypass Tray Size and Type, on page 2-7. You can print, zoom or read any diagram, picture or page from this Service Manual. Every chapter on this manual is fully detailed and contain all the simulation codes, trouble codes, maintenance procedures, reset procedures, diagnose procedures of Kyocera KM-2550. You can find easily everything what do you need. To see what contain, please read table of contents. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Kyocera Mita Km 2020 2035 2050 2550 Service Manual Repair Guide Parts List Catalog. To get started finding Kyocera Mita Km 2020 2035 2050 2550 Service Manual Repair Guide Parts List Catalog, you are right to find our website which has a comprehensive collection of manuals listed. CD-ROM's available. Each text box below shows the contents of each service For example, if you need the service manual for the DC Most of our service manuals are in pdf format for ease of use. All of the. Kyocera Mita Service Manuals are pdf format. Most of our service manuals are Service ManualsAi-1515F. Ai-1810. Ai-1810F. Ai-2020. Ai-3010. Ai-3030. Ai-4040. Ai-5050. Ai-5555. Ai-6060Ci-1100. Ci-7600Fax System B. Fax System E. Fiery SI Color Server. Fiery X3E. Fiery XJM. Fiery z4. Fiery zxPrint System 2. Print System G. Print System HVi7360PM Cycle Manuals. Ci 7500. Ci-7600Ai 1810Fax System c. Fax System e. Fiery x3EImaging Unit 4025Memory UnitPrinting System. Print System J. Print System Q. Print System R. PS-1 PostScript 3. Ringdale Network CardScan System B. Scan System C. Scan System D. Scanner Rack. Scanner UnitTS-1 For 4530. TS-1 For 5530. TS-1 For 6230. X3E Quick Start Guide. Parts Manuals. Ai 1515. Ai 1515f. Ai 1530. Ai 1810. Ai 1810f. Ai 2020. Ai 2030. Ai 2310. Ai 3030. Ai 4040. Ai 5050. Ai 5555. Ai 6060Ci 1100. Ci 7600Fax System BOutput FeederPrint System 2. Print System C. Print System E. Print System HVi7360. Xi 3648. Comparison Charts. PCL Comparison Chart. PJL Comparison Chart. Prescribe Comparison Chart. PCL 5e Command Comparison Chart. PJL Command Comparison Chart. Instruction Handbooks. Avision DS600C USer Manual. BF 1 Operation Guide. CAD Master Controller Operation Guide. CAD Master Controller Setup Guide. Ci 1100 Instruction handbook. DF 35 Operation Guide. DF 70 Operation Guide. DF 71 Operation Guide. DF 75 Operation Guide. DF 600 Operation Guide. DF 610 Operation Guide. DP 1400 Instruction handbook. DP 1800 Instruction handbook. DP 2800 Operation Guide. DP 2800 PLUS Operation Guide. DP 3600 Operation Guide. Ecolan 1000E Instruction handbook. Ecolan 1000E Quick Configuration Guide. EF 100 Operation Guide. F 4220 Instruction handbook. F 4330 Instruction handbook. F 4730 Instruction handbook. Fax System A Instruction handbook. Fax System B Instruction handbook. Fax System C Instruction handbook. Fax System E Instruction handbook. Fax System F Instruction handbook. Fiery XE3 Color Reference. Fiery XE3 System Software Installation. Fiery XE3 Color Guide. Fiery XE3 Configuration Guide. Fiery XE3 Getting Started. Fiery XE3 Job Management. Fiery XE3 PM Utility Scanner User Manual. Fiery XE3 Printing Guide. Fiery XE3 User Software Install. FS 1010 User Manual. FS 1200 User Manual. FS 1700 Instruction handbook. FS 1750 User Manual. FS 1800 User Manual. FS 1900 User Manual. FS 3600 User Manual. FS 3600A User Manual. FS 3700 Instruction handbook. FS 3750 User Manual. FS 3800 User Manual. FS 7000 User Manual. FS 8000C User Manual. FS 8000CD User Manual. FS 8000CN User Manual. FS 9100DN User Manual. FS 9500DN User Manual. IB-1 User Manual. Job Spooler Reference Guide. KM 1505 Instruction handbook. KM 1505 Instruction handbook (Spanish). KM 1510 Instruction handbook. KM 1810 Instruction handbook. KM 1530 Instruction handbook. KM 1530 Instruction handbook (Spanish). KM 2030 Instruction handbook. KM 2310 Instruction handbook. KM 3010 Instruction handbook. KM 2530 Operation Guide. KM 3530 Operation Guide. KM 4030 Operation Guide. KM 4230 Instruction handbook. KM 4530 Operation Guide. KM 4850W Operation Guide. KM 5230 Instruction handbook. KM 5530 Operation Guide. KM 6230 Instruction handbook. KM 6230 Instruction handbook (Spanish). KM 6330 Operation Guide. KM 8530 Operation Guide. KM C1530 Instruction handbook. KM C2030 Operation Guide (Admin). KM C2030 Operation Guide (Basic). KM C2030 Operation Guide (Advanced). KM C3130 Operation Guide (Admin). KM C3130 Operation Guide (Basic). KM C3130 Operation Guide (Advanced). KM C830 Operation Guide. KM C830D Operation Guide. KM F1050 Operation Guide. KM F650 Operation Guide. KM P4845W Operation Guide. KM P4850W Operation Guide. KM P4845W Operation Guide (Functions Edition). KM P4850W Operation Guide (Functions Edition). KM S4850W Operation Guide. M 2107 Instruction handbook. MT 1 Operation Guide. NC-2 Instruction handbook. NC-6 User Manual. Network fax Online Manual. PaperCom Quick Selctor User Guide. PCU-1 Instruction handbook. PH 3A Operation Guide. PH 3B Operation Guide. PH 3C Operation Guide. PH 3D Operation Guide. Print System 1 Instruction handbook. Print System 2 User Manual. Print System G Instruction handbook. Print System J (Inch Version). Print System K Instruction handbook (Functions Edition). Print System K Instruction handbook (Setup Edition). Print System M Instruction handbook (Functions Edition). Print System M Instruction handbook (Setup Edition). Print System N Operation Guide (Functions Edition). Print System N Operation Guide (Setup Edition)Print System P Operation Guide (Functions Edition). Print System P Operation Guide (Setup Edition). Print System Q Operation Guide (Functions Edition). Print System Q Operation Guide (Setup Edition). Print System R Operation Guide (Functions Edition). Print System R Operation Guide (Setup Edition). Scan System A Instruction handbook (Functions Edition). Scan System C Operation Guide (Setup Edition). Scan System D Operation Guide (Functions Edition). Scan System D Operation Guide (Setup Edition). Tandem System Instruction Manual. UG-1 User Manual. Vi7360 Instruction Handbook. Web Utilities User Reference Guide. Xi Repro System Instruction HandbookFRPO Manual. IC Link Everything you need to know. KPDL Emulation. MPS Manual. PDF417 2 Dimensional Bar Code Implementation Manual. Prescribe Commands New Machines Covered. F-8130 Service. F-8130 Parts. FS-600 Parts. FS-680 Parts. FS-800 Service. FS-800 Parts. FS-1714M Service. FS-1714M Parts. FS-3718M Service. FS-3718M Parts. FS-7028M Service. FS-7028M Parts. FS-C5016 Service. FS-C5016 Parts. FS-C8008 Service. FS-C8008 Parts. KM-F1050 Service. KM-F1050 Parts. KM-F650 Service. KM-F650 Parts. Accessories. AD-31 Service. AD-31 Parts. AD-32 Parts. AS-M811 Parts. AS-M811 Service. DF-30 Service. DF-31 Service. DF-31 Parts. DU-1 Service. DU-2 Service. DU-20 Service. DU-21 Service. DU-21 Parts. DU-25 Service. DU-25 Parts. DU-30 Service. DU-30 Parts. DU-31 Service. DU-31 Parts. DU-81 Service. DU-81 Parts. EF-100 Parts. EF-100 Service. HS-3e Parts. HS-20 Parts. HS-21 Parts. PD-30 Service. PD-30 Parts. PF-7E Service. PF-16 Service. PF-16 Parts. PF-21 Parts. PF-25 Parts. PF-30 Parts. PF-30 Service. PF-80 Service. PF-80 Parts. PF-81 Service. PF-81 Parts. SO-6 Parts. ST-30 Service. ST-30 Parts. ST-1000 Parts. UF-100 Service. UF-100 Parts They do include parts, error codes, trouble shooting etc.(the important stuff) They do include parts, error codes, trouble shooting etc.(the important stuff) FS-720 Parts List. FS-820 Service Manual. FS-820 Parts List. U342 Setting the ejection restriction Description Sets or cancels the restriction on the number of sheets to be ejected continuously when the internal eject tray is selected as the eject location. Purpose According to user request, sets or cancels restriction on the number of sheets. Method 1. Purpose According to user request, selects which has priority, the recovery time from preheat or energy saver. The screen for selecting an item is displayed. Setting 1. U404 Adjusting margins for scanning an original from the DF Description Adjusts margins for scanning the original from the DF. Purpose Used if margins are not correct when the optional DF is used. Caution Before making this adjustment, ensure that the following adjustments have been made in maintenance mode.U500 Setting the limit on data size for email transmission Description Sets the limit on the amount of data (number of originals) sent via email from the optional network scanner. Purpose To change the setting according to the network environment. Method Press the start key. U504 Initializing the scanner NIC Description Initializing the optional scanner NIC to its factory default. Purpose To return to a setup at the time of factory shipments. Method 1. Press the start key. The screen for executing is displayed. 2. Purpose To check the time to replace consumable parts. Also to clear the counts after replacing the consumable parts. Method 1. Purpose To check the paper jam status. Also to clear the jam counts after replacing consumable parts. Method 1. Press the start key. The jam count is displayed by jam codes. 2. Purpose To check the use of the DF and finisher. Also to clear the counts after replacing consumable parts. Method 1. U908 Changing the total counter value Description Displays, clears and changes the total counter value. Purpose To check the total counter value. Display Description COUNT (PRINTER) U960 Outputting the machine used circumstances list Description Outputs machine used circumstances list and clears the data. Purpose To check the machine operation situation. Also to clear the data. Outputting the list 1. Purpose To check the status of use of the scanner. Display Description TOTAL SCAN COUNT. Purpose To check the frequency of use of the printer or fax. Method Press the start key. U993 Outputting a VTC-PG pattern Description Selects and outputs a VTC-PG pattern created in the copier. Purpose When performing respective image printing adjustments, used to check the machine status apart from that of the scanner with a non-scanned output VTC-PG pattern. Method 1. Paper misfeed counts sorted by the detection condition can be checked in maintenance item U903. To remove paper jammed in the copier, open the front cover, conveying cover, side cover or drawer. FSW2 FSW1 1079 ms Timing chart 1-5-11 Feed switch 2 (FSW2) does not turn on within 1203 ms of feed switch 3 (FSW3) turning on. FSW3 FSW2 1203 ms. FSW2 1910 ms FSW1 Timing chart 1-5-23 Feed switch 2 (FSW2) does not turn off within 1203 ms of feed switch 3 (FSW3) turning off. FSW3 1203 ms FSW2. FSW1 1657 ms Timing chart 1-5-29. FSSW SBESW 1421(2797) ms The value in the parentheses indicates the value in switchback operation. Timing chart 1-5-43 The switchback eject switch (SBESW) does not turn off within 1421 ms (2797 ms) of the feedshift switch (FSSW) turning off. DFTSW OSBSW 770 ms. A paper jam in the is extremely curled.A paper jam in the deck is extremely curled.Replace feed switch 2 if indication of the correspond- paper feed section ing switch on the operation panel is not displayed in reverse. Replace feed switch 3 if indication of the correspond- paper feed section ing switch on the operation panel is not displayed in reverse. Replace feed switch 3 if indication of the correspond- paper feed section ing switch on the operation panel is not displayed in reverse. Check the status fixing section is indi- and remedy if necessary. Run maintenance item U031 and turn the feedshift switch on is indicated during and off manually. A message is also displayed requesting the user to call for service. C2000 Drive motor problem Poor contact in Reinsert the connector.If none, ble for 600 ms after the polygon mo- connector termi- remedy or replace the cable. Also check for con- the tray elevation tinuity within the connector cable.Also check for con- motor problem registration motor tinuity within the connector cable.Reinsert the connector. Also check for continuity within the A. Replace the main charger unit. B. Leaking main charger housing. Clean the main charger wire, grid and shield. Clean the contact glass. Perform the drum refresh operation. Readjust the center line of image printing (see page 1-6-19). 2. The machine does outlet.Run maintenance item U030 and check if CN16-B11, CN16- The eject motor B12, CN16-B13 and CN16-B14 on the main PCB go low. If not, does not operate.Broken upper lift motor Check for continuity across the coil. If none, replace cooling fan Cooling fan motor 5 coil. motor 5. does not operate. Poor contact in the cooling Reinsert the connector. Also check for continuity within the con- fan motor 5 connector ter- nector cable. Check for continuity across the coil. If none, replace feed clutch Feed clutch 2 does not operate. Poor contact in feed clutch Reinsert the connector. Also check for continuity within the con- 2 connector terminals. Also check for continuity within the con- The cleaning lamp ing lamp connector termi- nector cable. If none, remedy or replace the cable.See page 1-5-43. No developing bias Defective high-voltage is output.Also check for continuity within the con- The size of paper in paper length switch con- nector cable. If none, remedy or replace the cable.Also check for continuity within the con- The message re- nector terminals of safety nector cable. If none, remedy or replace the cable. No primary paper feed.Toner drops on the pa- dirty.Abnormal noise is ate smoothly. The selected maintenance item is run.Stop rings 7. Pull the paper feed shaft toward the rear of the primary paper feed unit (in the direction of the arrow) and remove the paper feed pulley.Bypass paper feed shaft Figure 1-6-16 13. Slide the bypass forwarding pulley shaft Bypass forwarding pulley shaft temporarily toward the rear side and then raise it to remove from the bypass unit. Bypass forwarding pulley Forwarding pulley retainer Figure 1-6-19 Bypass paper feed shaft. U403 U404 U402 (P. 1-6-31) (P. 1-4-49) Caution: Check the copy image after the adjustment. If the margins are still incorrect, perform the above adjustments in maintenance mode. Procedure Start Original Copy Copy example 1 example 2 Enter maintenance mode. Procedure 1. Remove the original cover or the DF. 2. Remove the upper right cover, upper front cover, upper rear cover and contact glass. Upper right cover Figure 1-6-26 3. Caution: After replacing the scanner wire, make a test copy and check the copy image. If the image is incorrect, perform the adjustments (see pages 1-6-25 to 31). Scanner wire Scanner wire Figure 1-6-32 (2-2) Fitting the scanner wires Caution: When fitting the wires, be sure to use those specified below. Mirror 2 frame Figure 1-6-34 4. Loop the inner ends of the scanner wires around the grooves in the pulleys at the right of the scanner unit, winding from below to above. Procedure 1. Remove the developing unit and drum unit (see pages 1-6-32 and 34). 2. Remove the four screws holding the lower right cover and then the cover. Figure 1-6-41 6. Remove the six screws holding the toner Toner container retainer container retainer and then the retainer. Figure 1-6-42 7. Caution: After replacing the ISU, make a test copy and check the copy image. If the image is incorrect, perform the adjustments (see pages 1-6-25 to 31). Positioning pins 2. Secure the ISU using the four screws. 3. Remove the two positioning pins and refit all the removed parts. Figure 1-6-49 1-6-24. Check for the longitudinal squareness of the copy image, and if it is not obtained, perform the longitudinal squareness adjustment. U065 U065 U053 U067 (auxiliary scanning (main scanning (P. 1-4-12) (P. 1-6-30) direction) (P. 1-6-28) direction) Caution: Before making the following adjustment, ensure that the above adjustments have been made in maintenance mode. U065 U065 U053 U070 (main scanning (auxiliary scanning (P. 1-4-12) (P. 1-4-15) direction) (P. 1-6-27) direction) Caution: Before making the following adjustment, ensure that the above adjustments have been made in maintenance mode. U034 U071 U066 (P. 1-6-10) (P. 1-4-16) Caution: Before making the following adjustment, ensure that the above adjustments have been made in maintenance mode. Procedure Scanner leading edge registration Start. U034 U072 U067 (P. 1-6-12) (P. 1-4-17) Caution: Before making the following adjustment, ensure that the above adjustments have been made in maintenance mode. Procedure Scanner center line Start. U402 U404 U403 (P. 1-6-13) (P. 1-4-49) Caution: Before making the following adjustment, ensure that the above adjustments have been made in maintenance mode. Procedure Start Enter maintenance mode. Procedure 1. Procedure 1. Remove the drum unit (see page 1-6-32). Drum separation claw assemblies 2. Push the drum separation claw assemblies with the minus driver from the top of the corner hole and remove the claw assemblies. Procedure 1. Open the front cover. 2. Remove the toner container and toner disposal tank. 3. Remove the screw and turn the developing release lever in the direction of the arrow. Procedure 1. Open the conveying cover. Transfer roller assembly 2. While holding down the projection, slide the transfer roller assembly toward the front to remove it. Procedure 1. Open the front cover and conveying cover. 2. Remove the three screws holding the front left cover and then the cover. Front left cover Figure 1-6-65 3. Heat roller separation claws Figure 1-6-68 (3) Detaching and refitting the press roller Follow the procedure below to replace the press roller. Press spring Procedure 1. Procedure 1. Remove the fixing unit (see page 1-6-36). Fixing gear 2. Remove the upper fixing cover (see page 1- 6-36). 3. Remove the press roller and fixing heater M and S (see pages 1-6-37 and 38). Procedure 1. Remove the fixing unit (see page 1-6-36). 2. Remove the upper fixing cover (see page 1- 6-36). 3. Disconnect the connector of the fixing unit thermistor. ROM replacing tool 2. Press the ROM replacing tool from both the right and the left sides. Primary feed conveys paper from the upper drawer, lower drawer or bypass tray to the left and right registration rollers, at which point secondary feed takes place and the paper travels to the transfer section in sync with the printing timing. Paper is fed from the bypass table by the rotation of the bypass forwarding pulley and bypass paper feed pulley. Also during paper feed, the bypass separation pulley prevents multiple sheets from being fed at one time by the torque limiter. At the same time, the upper paper feed clutch (PFCL-U) turns on, and the forwarding and paper feed pulleys rotate to start primary paper feed. The main charger unit charges the drum so that a latent image is formed on the surface, the shield grid ensuring the charge is applied uniformly. Figure 2-1-7 Optical section 1 Mirror 1 frame 2 Mirror 2 frame 3 Exposure lamp (EL) 4 Mirror 1 5 Mirror 2 6 Mirror 3. The scanner and mirror frames travel to scan on the optical rails on the front and rear of the machine to scan from side to side. By repeatedly turning the laser on and off, the laser scanner unit forms a latent image on the drum surface. The developing unit consists of the developing roller where a magnetic brush is formed, the doctor blade and the developing spirals that agitate the toner. When the toner sensor (TNS) detects a low toner level in the developing unit, the toner replenishment signal is output to the main PCB (MPCB). Rotation of the sleeve roller around the magnet roller entrains toner, which in turn forms a magnetic brush at pole N1 on the magnet roller. The height of the magnetic brush is regulated by the doctor blade;. The main PCB (MPCB) computes the absolute humidity based on this HUMSENS signal and the temperature (ETTH signal) detected by the external temperature thermistor (ETTH). Parameters for the developing bias are shown below. Duty Vp-p: Difference between the maximum and the minimum of applied voltage 1.72 kV (fixed) Vf: Frequency Typically 2.6 kHz. The cleaning lamp (CL) consists of LEDs and removes residual charge on the drum before main charging. When paper reaches the fixing section after the transfer process, it passes between the press roller and heat roller, which is heated by fixing heaters M or S (FH-M or FH-S). Pressure is applied by the fixing unit pressure springs so that the toner on the paper is melted, fused and fixed onto the paper. In duplex copying, paper is turned over by reverse rotation of the eject motor. When paper is transferred to the job separator or the internal finisher, the feedshift solenoid (FSSOL) is turned on to activate the feedshift guide to switch the paper transfer path. Turns the AC power for the fixing heater on and off. 3. Controls feed clutch 1 drive timing. 17. Feed switch 2 (FSW2). Controls feed clutch 2 drive timing 18. Drives upper drawer lift. 4. The main CPU U8 communicates with other PCBs, the image processing system and the engine drive system. The operation unit CPU U26 controls the LCD display and the entire operation section. The lighting of LEDs is determined by scan signals (SCAN5 to SCAN8) and LED lighting selection signals (DIGLED7 to DIGLED8) from the main PCB (MPCB).