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174

B246 SERIES TRAINING

COPIER ENGINE

DEVELOPMENT AND 

TONER SUPPLY

ˆ

The development process will be described.

ˆ

The toner supply mechanism will be described.

¾

Toner supply control maintains the correct proportion of toner in the 
developer mixture. The proportion of toner to developer may require 
adjustment to account for changes in the reflectivity of the OPC drum over 
time, or to respond to changes in conditions around the drum caused by 
variations in temperature or humidity.

ˆ

The toner near-end and toner end detection methods will be discussed.

Summary of Contents for B246 SERIES

Page 1: ...SERIES TRAINING COPIER ENGINE PRODUCT OUTLINE The model will be introduced to the class The optional peripherals will be introduced to the class The product concept sales points and targets will be p...

Page 2: ...2 2 Basic Information about the B246 Series...

Page 3: ...x models z B246 B250 55 cpm z B248 B252 65 cpm z B249 B253 75 cpm B250 B252 B253 contain the printer scanner unit as a standard component The printer scanner unit is an option for the B246 B248 and B2...

Page 4: ...ass tray has a capacity of 100 sheets Optional LCT 4 000 sheets 2 500 if the LG B4 kit is installed Adding it all up the machine has a maximum paper capacity of 8 300 sheets A4 LT The tandem tray main...

Page 5: ...e cover interposer allows cover sheets to be inserted at the times selected by the users It is installed between the mainframe and the finisher but is like an ADF feeding cover sheets into the paper f...

Page 6: ...the finisher and the copier The mailbox bin capacity is 100 sheets per bin The mailbox can only be installed if a B700 B701 finisher is installed But it cannot be used with the B706 finisher In the B...

Page 7: ...finisher not to the main copier This is unusual The proof tray junction gate diverts the paper either out to the proof tray or into the finisher for various stapling shift sorting or folding operation...

Page 8: ...8 8 What Options Does the Machine Have...

Page 9: ...o let it feed tab sheets Large Capacity Tray LCT Same as the B140 series LG B4 Kit for the LCT Same as the B140 series Copy Tray Same as the B140 series Cover Interposer Same as the Venus C1 almost th...

Page 10: ...not have a lower tray for stapled and folded booklets B706 3 000 sheet finisher with 100 sheet stapler same as the B140 series z This finisher contains a jogger mechanism for z folded output But the...

Page 11: ...06 Each punch unit has three types for different parts of the world z Jogger unit The B706 finisher has an optional jogger unit This unit jogs the edges of the copy stack when it goes out from the fin...

Page 12: ...ard This is also called the file format converter Copy tray If the customer does not want a finisher or a mailbox they will need this tray which they must obtain as an option it is not a standard part...

Page 13: ...USB Ethernet board and a 256 MB memory DIMM PostScript3 kit New Interfaces Only one of these can be installed at the same time z IEEE1284 interface z IEEE1394 interface z IEEE802 11b interface z Bluet...

Page 14: ...0CPM MT MT C2a C2a 51CPM 51CPM 75 70 60 50 CPM CY02 3Q CY04 4Q CY06 2Q MT C1c 75CPM M C2b 55CPM MT C1b 60CPM MT MT C3c C3c 75CPM 75CPM MT MT C3b C3b 65CPM 65CPM MT MT C3a C3a 55CPM 55CPM MT MT C3c C3c...

Page 15: ...sided copying Security z Copy Data Security Unit z Data Overwrite Security unit z Authentication Quick Start 30 seconds to warm up Two sided scanning in the ADF The ARDF contains a CIS that scans the...

Page 16: ...z Grid voltage adjustment z Laser diode power adjustment The number of steps is controlled by SP 3904 The default is 0 the minimum number of steps is done and the charge corona wire is not cleaned Th...

Page 17: ...onthly Copy Volume z B163 25 k z B140 30 k z B141 50 k Maximum Monthly Copy Volume 150 k PM Interval 300 k EM Interval 100 k MCBC 75 k Estimated Unit Life 9000k prints or 5 years Time necessary to ins...

Page 18: ...300 k so the developer will often be changed at 300 k Compatibility z The toner and developer can be used with the B064 and B140 series z The OPC drum is new and cannot be used with the B064 and B140...

Page 19: ...19 19 B246 SERIES TRAINING COPIER ENGINE SPECIFICATIONS This section will take a quick look at the important specifications...

Page 20: ...50 55 cpm z B248 B252 65 cpm z B249 B253 75 cpm First Copy Time A4 LT LEF Tray 1 face up platen mode z B246 B250 4 2 s B248 B249 B252 B253 3 5 s Warm up Time z Less than 30 s from auto off mode and fr...

Page 21: ...ns 2 ADF capacity 100 sheets 12 mm stack thickness Original size ADF z A3 B6 for one sided copying z 11 x 17 5 1 2 x 8 1 2 Original weight z 1 sided original 40 128 g m2 11 34 lb z 2 sided original 52...

Page 22: ...A3 11 x 17 A5 SEF 5 5 x 8 5 z By pass tray A3 11 x 17 A6 SEF 5 5 x 8 5 z Non standard sizes Width 100 305 mm 4 x 12 Length 148 600 mm 5 5 x 23 4 Paper weight z Paper Tray 52 3 127 9 g m2 14 34 lb z D...

Page 23: ...23 23 Specifications 4 Output Tray Capacity z A4 8 5 x 11 and smaller 500 sheets z B4 and larger 250 sheets RAM 256 MB expandable to 512 MB HDD 80 GB Scan Resolution 600 dpi Print Resolution 1 200 dpi...

Page 24: ...ing the scanner printer controller hardware will be covered However installing drivers and software will not be covered in this course Make sure the class members all get a chance to install all of th...

Page 25: ...25 25 Overview This section tells you what units the class will install...

Page 26: ...in the manual and take note of all warnings and cautions in the procedures Tandem tray If the user doesn t wish to use the default paper size the technician has to adjust the tray and change an SP se...

Page 27: ...l and take note of all warnings and cautions in the procedures Tandem tray If the user doesn t wish to use the default paper size the technician has to adjust the tray and change an SP setting The cla...

Page 28: ...8 28 Important Points about Installation Copier These next few slides will explain the important points about installation Go over these points with the class Then the class will install their machine...

Page 29: ...elopment unit you must check if there is a toner bottle installed If there is a toner bottle remove it If you do not do this the toner bottle holder will be damaged during the installation procedure R...

Page 30: ...oving and Filling the Development Unit step 12 You have to input the developer lot number as part of the developer process control initialization procedure we shall see later This allows machines with...

Page 31: ...ter back down after putting the development unit back Otherwise the door will not close Removing and Filling the Development Unit step 14 So if the door wont close don t try to force it Maybe someone...

Page 32: ...step ensures that the gears mesh correctly 1 2 3 Correct Incorrect Reinstalling the Development Unit Follow the instructions on this page carefully when putting the development unit back This ensures...

Page 33: ...machine power on auto process control will not start at this time z This SP is only used during installation z During SP 2963 you must input the lot number that is written on the developer packet When...

Page 34: ...different paper size Then set SP 5959 001 to the correct paper size Tandem Tray If the user doesn t wish to use the default paper size the technician has to adjust the tray and change an SP setting D...

Page 35: ...5841 001 Supply Name Setting Toner Name Setting Black SP codes The toner name appears on the display when the user presses the Inquiry button on the user tools screen Key cards This is not officially...

Page 36: ...hard disks spare parts have no stamp data If a hard disk breaks and must be replaced both hard disks must be replaced and the stamp data must be copied back from the firmware onto the new hard disks...

Page 37: ...37 37 Installation Copier...

Page 38: ...38 Install your Copiers Installation Procedure z Service manual section 1 2 2 z Do the procedure in the manual z Obey all warnings and cautions in the procedure Do not install the options at this tim...

Page 39: ...39 39 Important Points about Installation Options These next few slides will explain the important points about installation Go over these points with the class Then the class will install the options...

Page 40: ...ser needs A3 DLT in tray 1 and does not require the tandem tray Then set SP 5959 001 to the correct paper size Service manual section 1 3 Don t forget to change the SP mode setting after changing the...

Page 41: ...have to install the B4 LG feeder kit then change SP 5959 005 Service manual section 1 4 The installation procedure for the LCT is here Service manual section 1 5 The installation procedure for the B4...

Page 42: ...isher After installing the finisher input the staple types with SP 5841 If you install the cover interposer wait until after you install the cover interposer before you dock the finisher to the machin...

Page 43: ...apling option is displayed see below If it is not select the center position stapling mode with a user tool z Copier Document Server Features Input Output Stapling Position z Touch any staple position...

Page 44: ...44 44 Installing the B700 B701 Finishers If you install the cover interposer wait until after you install the cover interposer before you dock the finisher to the machine...

Page 45: ...ng the installation the auxiliary trays are stored in a pocket at the back of the finisher Make sure that the customer understands the purpose of these trays z The service manual contains an explanati...

Page 46: ...46 46 B700 B701 Finishers Jogger Unit Set SP 6118 to 1 after you install the B703 jogger unit option...

Page 47: ...47 47 Punch Units Make sure that you install the correct punch unit for each finisher z The B700 and B701 use the same punch unit but the B706 uses a different one...

Page 48: ...06 finisher only Install the corner plates Do not dock the cover interposer to the machine until after you install the z folder unit After you install everything z If the correct size is not detected...

Page 49: ...l this on the B700 or B701 finisher Procedure z Dock the z folder to the finisher Extend the supports at the base see the next slide z Dock the z folder finisher cover interposer assembly to the copie...

Page 50: ...50 50 Installing the Z folding Unit Extend the feet as shown below z The Z folding unit is not stable with or without the feet extended Do your work carefully do not tilt the unit...

Page 51: ...ion Make sure that the main power switch of the copier is off Push the breaker test button with the tip of a screw driver until the breaker switch snaps to the off position left Reset the breaker swit...

Page 52: ...Installing the Mailbox B762 Use the procedure for the B762 cover interposer not the B471 If the cover interposer is installed you must remove it before you install the mailbox Service manual section...

Page 53: ...53 53 Installation Options...

Page 54: ...at this time B704 cover interposer Section 1 16 B660 z folding unit Section 1 13 z Dock the B700 B701 finisher cover interposer z folder assembly to the copier z Test the breaker switch B702 punch un...

Page 55: ...55 55 Install the Options 2 Other options z B756 copy tray Section 1 19 z B842 copy connector kit Section 1 21 3 z Brackets for key card and key counter Section 1 20...

Page 56: ...rtant Points about Installation Printer Scanner and Options These next few slides will explain the important points about installation Go over these points with the class Then the class will install t...

Page 57: ...he cover See the diagram z A1 Tandem This is for the copier connector kit Each board or SD card must be put in the correct slot C1 B1B2 B3 C2 C3 A1A2 A1 A2 B1 B2 B3 C1 C2 C3 USB Host File Format Conve...

Page 58: ...possible choices z IEEE1284 Interface Centronics z IEEE 1394 Interface FireWire z IEEE 802 11b Interface Wireless LAN z Bluetooth Interface z Cumin M NRS interface B3 Gigabit Ethernet USB card z This...

Page 59: ...ly slot for applications To install more than one application you must merge the software onto one card z Procedure Service manual section 1 23 1 z Possible applications Printer Scanner Kit VM Card Da...

Page 60: ...or installing new firmware z It is also used during the installation procedure for the browser unit The machine copies firmware from the SD card to the hard disk during the procedure You must remove t...

Page 61: ...D card the original card is de activated z It can be re activated with the Undo Exec procedure in section 1 23 1 But the customer must keep it as a proof of purchase The original cards can be attached...

Page 62: ...rmware SD card z 256MB memory DIMM A 256 MB RAM DIMM must be installed in the empty memory slot z SP 7836 shows the size of the memory installed in the machine at this time Service manual section 1 24...

Page 63: ...63 63 Installing the Printer Scanner Kit Note the correct way to install a DIMM z Service manual section 1 22 2 Service manual section 1 22 2...

Page 64: ...change SP 5985 001 and 002 from 0 to 1 then turn the main power switch off and on z If you do not do this the machine will not be able to use the Ethernet and USB interfaces Other SP settings z SP5907...

Page 65: ...NVRAM inside the copier before you install the correct DOS unit z After you install the unit print an SMC report and check that you have installed the correct type Before you can install this unit th...

Page 66: ...rowser Unit During the installation procedure you put an SD card in slot C3 Then the machine copies some software from the SD card After installation you must remove the SD card from slot C3 Service m...

Page 67: ...the factory the IPU does not have this application z You must always install a new IPU board when you install the Copy Data Security Unit option Then enable the Copy Data Security feature with a user...

Page 68: ...68 68 Installation Printer Scanner and Options Service manual section 1 24...

Page 69: ...69 69 Install the Options Use the procedures in the service manual section 1 24...

Page 70: ...70 70 Updating the Firmware...

Page 71: ...de table z Also see section 4 1 3 for more information on error codes Service manual section 5 4 1 Have the class update the machine firmware The procedures are all in the manual Downloading Stamp Dat...

Page 72: ...RAINING COPIER ENGINE OPERATION This section will cover important points about operation the SP modes that are related to operation and some of the user tools Have the class try out the features cover...

Page 73: ...the ADF scans both sides of the original at the same time without inverting 8 Paper trays The top tray is a tandem tray It can be converted to a conventional paper tray for users who wish to feed size...

Page 74: ...Operation Panel Operating Instructions About the Machine Getting Started Control Panel Ask the class to study this section of the operation manual to make sure that they understand what all the butto...

Page 75: ...r tools Copy Document Server Features General Features Customize Function Copier The General Settings Guide Copy Document Server Reference Printer Reference and Scanner Reference operation manuals als...

Page 76: ...76 76 Simplified Display Here is an example of the simplified display...

Page 77: ...ype Tray 2 or 3 z You cannot use tray 1 for tab stock Install the optional tab sheet tray in the selected tray Operating Instructions Copier Reference Copying Basic Procedure Copying onto Tab Stock Ma...

Page 78: ...78 78 Copying onto Tab Sheets 2 The side without the tabs must feed into the machine first Take care which way up you put the stack of tab sheets in the tray...

Page 79: ...n original types are Text Photo Text Photo Generation Copy and Pale Original Service manual section 6 6 4 The table in the service manual shows which original types are suited to each of the original...

Page 80: ...eference Copying Copier Functions Preset Reduce Enlarge Enlargement and reduction are similar to other models However it is worth mentioning the point shown on the slide To illustrate the difference b...

Page 81: ...ating Instructions Copy Reference Copying Copier Functions Stapling Try various staple position settings inside the red circle on the slide Refer to the diagrams in the operation manual that show the...

Page 82: ...Input Output Punch Type Punching is not allowed with z folding Operating Instructions Copier Reference Copying Copier Functions Punch Try various punch position settings inside the red box on the sli...

Page 83: ...s are available The procedures are similar Select the trays that you want to feed the cover paper from User Tools System Settings Tray Paper Settings Front Cover Sheet Tray Back Cover Sheet Tray If yo...

Page 84: ...ion of the operation manual This only covers scanning storing and printing at the operation panel It does not cover any operations that can be carried out remotely from a computer Note that the machin...

Page 85: ...Administrator Tools AOF This enables and disables auto off mode Service manual section 6 14 The slide shows the details of how the machine handles energy saver mode in accordance with the default sett...

Page 86: ...he default values of the timers are all the same one minute see the previous slide z The timers can be adjusted with user tools System Settings Timer Settings Because of this the machine goes into aut...

Page 87: ...stration z 6006 ADF Registration Margins z 2101 Printing Erase Margin z 4012 Scanner Erase Margins z Scanner SP 1005 Scanner Mode Erase Margin These SPs are related to machine operation Have the class...

Page 88: ...gine Main Scan Magnification z 2910 Print Engine Sub Scan Magnification z 4008 Scanner Sub Scan Magnification z 6017 ADF Magnification Note the difference between SP 2910 and 4008 as mentioned on the...

Page 89: ...s what happens when the original size sensors in the scanner cannot detect the size z 5126 6016 Determines what original sizes are detected in the ADF for certain sizes that are hard to distinguish Se...

Page 90: ...same as some of the user tool settings System Settings Tray Paper Settings Paper Type 5047 For users who wish to reuse paper which has already been printed one one side this SP can be enabled Then the...

Page 91: ...ounters 5913 Wait time when switching between applications 5914 Determines which counters are displayed copier mode printer mode 5918 Determines whether the counter is displayed when entering administ...

Page 92: ...S TRAINING COPIER ENGINE MACHINE COMPONENT OVERVIEW The components will be discussed The paper feed path and copying process will be outlined The machine s organization and overall PCB structure will...

Page 93: ...drum is similar to the Mojito However the toner recycling system is new The fusing unit contains a web unit for cleaning The fusing and exit units can be separated for easier servicing The duplex uni...

Page 94: ...aths from LCT bypass and standard trays Paper output paths to finisher proof tray and lower feed out slot for trays 1 and 2 Demonstrate how the cover interposer fits into the paper path The cover inte...

Page 95: ...95 95 Cover Interposer Capacity 200 sheets Paper weight up to 216 g m2 Feed belt and separation roller system This diagram is a close up of the cover interposer s feed in path...

Page 96: ...ith Mailbox Service manual page 6 4 This diagram shows the machine with a mailbox installed instead of a cover interposer Demonstrate the paper exit path up to the mailbox There are some more details...

Page 97: ...finisher not to the main copier This is unusual The proof tray junction gate diverts the paper either out to the proof tray or into the finisher for various stapling shift sorting or folding operatio...

Page 98: ...e 6 5 This diagram shows the motors At this time introduce the component layout diagrams and the point to point diagram Also hand out copies of the component list components doc This list explains wha...

Page 99: ...functions of the boards inside the machine The BCU is the main board The controller board interfaces the machine with computer networks and connects to all the printer scanner options and memory devic...

Page 100: ...Copy Process Overview Service manual section 6 3 This is very similar to the Mojito and SP5 There is only one development roller in this model Process control includes a new step development bias adj...

Page 101: ...slide REPLACEMENT Service manual section 3 12 Have the trainees remove and replace the parts in this section Remind them to follow all notes and cautions in the manual Many of these procedures have SP...

Page 102: ...o their previous condition z But you can only do this if you made a backup of the NVRAM to an SD card on a previous visit z But you cannot get back settings that were made after that visit If you repl...

Page 103: ...P 5832 001 recommended but not required z Copy the stamp data to the disks from the firmware SP5853 Then switch the machine power off on Service manual section 3 12 7 Have the class remove and replace...

Page 104: ...ustom made stamps z Document server address book The address book and document server documents if needed must be input again Custom made stamps must be re made and stored again If the customer is usi...

Page 105: ...n with the customer for disposal or safe keeping The HDD may contain proprietary or classified Confidential Secret information z Specifically the HDD contains document server documents and data stored...

Page 106: ...106 106 B246 SERIES TRAINING COPIER ENGINE DOCUMENT FEEDER The ARDF is a standard component of the machine This section of the course will explain the ARDF s mechanisms...

Page 107: ...at the entrance roller to correct skew When the interval sensor detects the leading edge the pre scanning roller stops for skew correction but only for small original sizes B6 A5 HLT or for duplex sca...

Page 108: ...Pick up Roller Lift Motor Feed Motor Bottom Plate Motor Transport Motor Exit Motor Service manual section 6 4 2 The diagram looks like a plate of spaghetti However the manual explains which motor is...

Page 109: ...on is detected by the pick up roller HP sensor When the trailing edge of the original passes the entrance sensor and there are still some originals on the tray the pick up roller is again dropped onto...

Page 110: ...ged with SP 6900 The default is when an original is detected as shown on the slide However this can be changed to after the Start key is pressed The bottom plate sensor determines whether the plate ne...

Page 111: ...vice manual section 6 4 6 Full details of the feed path are in the manual Remember that there is no inverter The second side is scanned by the CIS which is near the exit roller There are some differen...

Page 112: ...from the default the roller will stop like for other job types for more precise skew correction However copy speed will be reduced For other types of job the pre scanning roller stops All duplex scan...

Page 113: ...ut 120 The other set of four sizes will then be detected To change back again input 0 Europe There are two sets of three sizes To switch from the default set to the other input 7 The other set of thre...

Page 114: ...o sided scanning has been selected z This means that for two sided scanning the original feeds though the scanner one time only The resolution is 600 dpi the same as the CCD The white roller below CIS...

Page 115: ...the skew correction and registration sensors Jam detection at the skew correction interval registration and exit sensors Skew Correction Sensor Interval Sensor Registration Sensor Exit Sensor Service...

Page 116: ...default disabled SP 4020 002 Sensitivity adjustment SP 4020 003 Adjusts image processing parameters to remove thin vertical lines caused by dust z A speck of dust on the ADF exposure glass causes a th...

Page 117: ...items must be replaced as a set REPLACEMENT Service manual section 3 13 Have the trainees remove and replace the parts in this section Remind them to follow all notes and cautions in the manual CIS Do...

Page 118: ...E SCANNER The scanner mechanism will be discussed in this section It only covers the movable scanner inside the main body of the machine and not the CIS inside the ADF This was covered already Image p...

Page 119: ...gth sensors In this machine there is an ADF exposure glass In ADF mode the scanner moves below this glass and scans the original while the ADF feds it past this glass In the Mojito and SP5 there was n...

Page 120: ...o home position The first scanner contains the exposure lamp reflectors the 1st mirror and the lamp regulator The second scanner contains the 2nd and 3rd mirrors The regulator is mounted on the scanne...

Page 121: ...s behaviour if the sensors cannot detect the size The service manual explains how the width and length sensors work in the following modes Book ADF open The CPU checks the sensors when the Start key i...

Page 122: ...e by changing the scanner motor or ADF feed motor speed Service manual section 6 5 4 This is the same as for other models Note that below 50 the scanner cannot move fast enough so image processing is...

Page 123: ...from the edge and reads 60mm across the main scan from that point CIS z Reads reference white from the white roller opposite the CIS z Starts 20 mm in from the edge and reads 65mm across the main sca...

Page 124: ...de CIS SP 5106 Image density for the central notch in ADS mode These SPs allow you to adjust the location where the reference white is read from in case the DF exposure glass or reference white plate...

Page 125: ...manual Note that the copy adjustments must be done after replacing the lens block or the scanner motor There is no need to do them in the class unless the trainees need some practise Service manual s...

Page 126: ...126 126 B246 SERIES TRAINING COPIER ENGINE IMAGE PROCESSING This section explains the image processing done inside this machine...

Page 127: ...oller HDD Service manual section 6 6 1 This diagram shows which parts of the machine take part in image processing The CIS is in the ADF as mentioned earlier It scans the reverse side of two sided ori...

Page 128: ...four sub types is a custom setting mode which can be customized with SP settings Service manual section 6 6 3 The table in the service manual shows which original types are suited to each of the origi...

Page 129: ...sing the custom setting SP modes z Image quality z Line width correction z Duplex scanning image quality There are only three sets of adjustments for the custom setting original types These are listed...

Page 130: ...t will be used depends on the setting of SP 4904 002 The dither matrix size setting affects the quality of photo images If the customer complains about the quality of photo images experiment with this...

Page 131: ...he effect of line width correction with SP4904 020 to 024 Service manual section 6 6 4 Line Width Correction These tables explain how to use the SP modes that control line width correction The extra a...

Page 132: ...her SP4901 or SP4902 until the quality is about the same In some original modes if halftones photos are present vertical white lines may appear in the scan To remove these adjust SP 4902 for that orig...

Page 133: ...setting original sub types SP 4903 060 to 064 Service manual section 6 6 4 Settings Adjustable for Each Original Mode These tables explain how to use the SP modes that control independent dot erase T...

Page 134: ...setting original sub types SP 4903 070 to 074 Service manual section 6 6 4 Settings Adjustable for Each Original Mode These tables explain how to use the SP modes that control background erase This a...

Page 135: ...2111 FCI shading detection only when using the printer controller 2114 Edge processing only when using the printer controller Look at the SP tables and try to study the effects of these SPs on variou...

Page 136: ...136 136 Scanner and Fax Mode SPs SP 4550 to 4585 These SPs are available to adjust image processing for fax and scanner modes...

Page 137: ...137 137 B246 SERIES TRAINING COPIER ENGINE LASER UNIT This section explains how the laser unit converts the image data signal into laser pulses for writing the latent image on the OPC...

Page 138: ...o no beam pitch adjustments Service manual section 6 7 1 The main points are on the slide More detailed specs are in the service manual Normally only two levels are used However when FCI smoothing als...

Page 139: ...139 139 Optical Path Service manual section 6 7 2 This is a standard laser optics unit with only one laser synch detector The Core Technology Manual has more information on laser optics components...

Page 140: ...140 140 LD Unit Service manual section 6 7 3 This diagram shows the laser diode unit with the four laser diodes...

Page 141: ...141 141 1 200 dpi Laser Printing CH1 CH2 CH3 CH4 Main Scan Sub Scan Service manual section 6 7 3 The four main scan lines overlap slightly The close spacing of the dots provides 1 200 dpi resolution...

Page 142: ...is always on when the mirror is turning The mirror only stops in auto off or night mode or when the machine is switched off Laser Diode Unit Polygon Mirror Fan Service manual section 6 7 4 The main p...

Page 143: ...e laser diodes is disconnected z Switch name Front door safety switch Front Door DATA1 DATA1 IPU MGAVD PSU LVDS RECEIVER IC 5V 3 3V 3 3V 5V DATA1 LDD AARE ALD 10 8 2 15 560 560 LD5V Inter lock SW 5 1...

Page 144: ...raw attention to the laser beam cautions Laser beams can seriously damage the eyes Note that several adjustments must be done after replacing the LD unit SP2962 forced process control SP2115 input the...

Page 145: ...145 145 B246 SERIES TRAINING COPIER ENGINE PROCESS CONTROL In this section process control will be described...

Page 146: ...al control using the drum potential sensor charge corona grid voltage development bias and laser diode power to correct drum potential to compensate for the points listed in the service manual This se...

Page 147: ...maller number of steps is done immediately after the machine power is turned on The number of steps is controlled by SP 3904 The default is 0 the minimum number of steps is done and the charge corona...

Page 148: ...diode power adjustment ID sensor calibration not done during Short Process Control Toner density sensor reference voltage calibration not done during Short Process Control Service manual section 6 8...

Page 149: ...ntrol Forced process control z When SP 2962 is done This is a forced process control use this SP to do the process control procedure when it is necessary Service manual section 6 8 11 What Happens at...

Page 150: ...um voltage is first 100V then 800V The drum potential sensor outputs are taken for each of these two applied voltages From these two readings the machine can determine the actual drum potential from s...

Page 151: ...Development Bias Bias Grid and LD Adjustment The next step is to calibrate the development bias This step was not done in the Mojito or SP5 In the Mojito development bias was fixed at 900V The slide...

Page 152: ...P P BCU Service manual section 6 8 11 Development Bias Bias Grid and LD Adjustment The potential on unexposed areas of the drum VD gradually changes during drum life To keep VD constant the grid volta...

Page 153: ...ce voltage VREF updates correctly NOTE VREF is also updated regularly using the ID sensor pattern However LD power adjustment for the ID sensor pattern is not done at that time LD power is only adjust...

Page 154: ...sted until the output is 4 0 0 2V At certain intervals during the day for details see Development and Toner Supply the output is measured and compared with the reading from a standard sensor pattern T...

Page 155: ...VSG From the bare drum z VSP From the ID sensor pattern Service manual section 6 8 11 TD Sensor Calibration This is done to keep the concentration of toner in the developer as stable as possible Readi...

Page 156: ...ntrol is done Use this for testing the effects of a certain value 2001 005 This is the grid voltage used when copying to OHPs In OHP mode process control values are not used The SP values for OHP mode...

Page 157: ...e drum and the processes around it including quenching charge corona unit drum cleaning and toner recycling There are a lot of fans to cool the machine Without cooling the extra heat generated by the...

Page 158: ...diameter There is a Drum Potential Sensor and ID Sensor Charge Corona Unit With cleaning pads Pick off Pawls The spurs rotate and move the pawls into contact and away from the drum as they turn Cleani...

Page 159: ...159 159 Drum Ventilation Holes Grounding Brush Service manual section 6 8 2 Note the ventilation holes and the grounding brush...

Page 160: ...Unit Drive Shaft Service manual section 6 8 3 The drum motor drives the drum through the shaft on the left of the drawing It also drives the drum cleaning unit through the shaft on the right The flyw...

Page 161: ...d to maintain copy quality Service manual section 6 8 4 The main points are on the slide Charge rollers are not much good for very fast machines This is because they only contact a very narrow area of...

Page 162: ...r z Prevents low density bands on copies Motor Service manual section 6 8 5 This mechanism removes dust from the wire to prevent pale banding on copies The cleaner moves from front to rear and back ag...

Page 163: ...ot cleaned At the end of a job if one of these conditions occurs z The wire was not cleaned for 24 hours or more You can change this interval with SP 2966 z 5 000 copies or more were made after the la...

Page 164: ...Side to side movement during copying to prevent drum wear Shaft Cam Pawls Service manual section 6 8 6 Describe the side to side movement mechanism and the reason for it Remind the class of the spurs...

Page 165: ...ush removes the toner and the blade removes bits that the brush missed The toner collection coil carries the toner in the cleaning unit back to the development unit The blade moves from side to side A...

Page 166: ...edge wear and drum scratching Lock the release lever in the upper position before transportation Blade Cam Service manual section 6 8 7 The blade always contacts the drum A cam moves it from side to s...

Page 167: ...Fan Ozone Filter Exhaust Fan Service manual section 6 8 8 Follow the flow of air in from the drum cooling fan through the drum and out through the ozone filter There is an ozone filter because corona...

Page 168: ...6 8 9 The toner separation unit is inside the toner hopper Toner that passes through the sieve goes into the toner hopper and on to the development unit for re use The next slide shows what happens t...

Page 169: ...ble toner is pushed out here Service manual section 6 8 9 Part of the recycled toner from the drum unit cannot be reused This slide shows how the unusable toner is pushed out to the waste toner collec...

Page 170: ...ice manual gives the capacity and expected life of the bottle The coils are driven by the following motors Toner collection motor Drives the vertical coil and the coil inside the toner collection bott...

Page 171: ...ed earlier in this section SP MODES Charge Corona Unit 2001 Grid voltage was discussed in the Process Control section 2803 Forced charge corona wire cleaning Use this to clean the corona wires if clea...

Page 172: ...001 Cleaning blade edge cleaning during multi copy jobs enable disable To clean the blade edge the drum turns in reverse for 4 mm The default is disabled However the blade edge is cleaned at the end...

Page 173: ...est purposes do SP 2 220 after installation This inputs the value of VREF for that development unit for use during the test Development unit reinstallation Note the correct way to re install the devel...

Page 174: ...ntrol maintains the correct proportion of toner in the developer mixture The proportion of toner to developer may require adjustment to account for changes in the reflectivity of the OPC drum over tim...

Page 175: ...iner toner and developer is used and the technology of the copy process has been improved sufficiently to allow the return of the single roller system This extremely fine toner and developer has impro...

Page 176: ...per Toner recycling system Service manual section 6 9 1 Recycled toner from the drum cleaning unit mixes with new toner The toner density sensor image density sensor and image pixel count for the page...

Page 177: ...177 177 Development Mechanism Service manual section 6 9 2 This is very similar to other machines that use dual component developer...

Page 178: ...separate motor dedicated to the task drives the development roller This reduces the load on the drum motor to stabilize drum motor rotation The development motor drives the three mechanisms indicated...

Page 179: ...vanes transport this toner towards the rear Some toner falls onto the auger and is transported toward the front Mixing does the following Keeps the toner and developer evenly mixed Prevents lumps from...

Page 180: ...lied Point out the following The development bias is 550V White areas of the latent image on the drum remain at a high ve voltage about 950 V The laser exposes the black areas Then the black areas dro...

Page 181: ...nual section 6 9 5 Describe this mechanism The development motor drives the toner supply roller The toner supply clutch is included in the development motor assembly The toner supply clutch turns on t...

Page 182: ...ven by the toner supply motor Service manual section 6 9 9 Describe this mechanism Describe how the bottle drive mechanism moves toner into the development unit Service manual section 6 9 8 Describe h...

Page 183: ...ner End Sensor Pressure sensor Checked every copy Service manual section 6 9 7 The toner end sensor detects when the amount of toner in the hopper is low More about toner end detection will be explain...

Page 184: ...ice manual section 6 9 6 Development unit Two fans above the bypass tray They switch on when the drum motor switches on and stay on for 110 seconds after the drum motor switches off Service manual sec...

Page 185: ...er variations in how chargeable toner is affect the image on the drum Therefore the ID sensor monitors a reference pattern on the drum and the readings are used to change the toner concentration to ke...

Page 186: ...ned on or after recovery from auto off mode if process control was not done for 24 hours or more z The interval can be changed with SP 2966 Service manual section 6 9 10 This must be done every time n...

Page 187: ...he coefficients used in the toner supply calculation If image pixel count mode is in use this figure remains at 0 7 The value of GAIN is determined as follows VREF VT 0 2 GAIN 4 0 2 VREF VT 0 1 GAIN 3...

Page 188: ...All other toner supply factors are kept unchanged The toner supply motor turns on Service manual section 6 9 10 In image pixel count mode GAIN is fixed at 0 7 All other parameters remain at the value...

Page 189: ...6 z The drum cleaning blade is also cleaned If copies get too pale or too dark during long jobs enable this feature using SP 2506 001 If it has no effect try a shorter interval SP2506 002 At power on...

Page 190: ...s when either or both of these sensors are defective An SC code is logged but not displayed and the machine can still be used even if both sensors break the operating mode changes as shown in the tabl...

Page 191: ...0 times in the last 100 copies Toner Near End is displayed z If 1 000 consecutive copies have been made with low toner Toner End is displayed The toner end sensor is used Service manual section 6 9 7...

Page 192: ...the current TD sensor output VT with the reference voltage VREF z If VT is less than or equal to VREF there is enough toner Toner near end end is cleared z If VT is more than VREF the clutch turns on...

Page 193: ...193 193 SP Modes Development z 2201 Development bias for copying SP MODES Development 2201 This was covered in Process Control...

Page 194: ...ommonly copies documents with a high proportion of black 2210 etc ID sensor pattern intervals were discussed on an earlier slide in this section 2223 Displays the average of the latest 16 TD sensor ou...

Page 195: ...e new developer initialize the TD sensor SP2801 after the machine has warmed up Note that you will need the developer lot number on the bag The door must also be open before you turn the power on Foll...

Page 196: ...196 196 B246 SERIES TRAINING COPIER ENGINE PAPER FEED Paper feed mechanisms built into the machine will be described in this section The optional LCT will be covered in a separate section...

Page 197: ...e the main points about these trays There are no clutches Each feed station has a motor Point out the following locations Feed separation rollers in trays 1 2 and 3 Grip rollers in trays 1 2 and 3 the...

Page 198: ...he slide shows the motors involved in paper feed from the trays The by pass motor is not shown here We will see it a bit later Each tray has a motor The motor drives the pick up feed separation and gr...

Page 199: ...motor lifts the tray Service manual section 6 11 3 Describe how the lift motor raises the tray The machine detects that the tray is in place as follows 1st tray Electrical connection between tray and...

Page 200: ...es the pick up roller which falls onto the top of the stack Tray Lift Trays 2 and 3 2 Service manual section 6 11 3 The lift sensor detects when the paper stack is at the correct height Describe how t...

Page 201: ...Service manual section 6 11 3 Describe what happens when pulling out the tray In the 2nd and 3rd trays the bottom plate lowers under its own weight when the tray is pulled out For the 1st tray this m...

Page 202: ...ore the first page and between pages Grip Roller Service manual section 6 11 3 Paper Feed and Separation No Paper Present Between pages the grip roller has to turn because there may still be some pape...

Page 203: ...aration roller solenoid and pick up solenoid both turn on There is no feed clutch because each tray has its own motor When the separation roller solenoid turns on the separation roller contacts the pa...

Page 204: ...se Service manual section 6 11 3 Separation Roller Release The separation roller is normally away from the feed roller List the advantages of this Reduced wear on rollers no contact between rollers wh...

Page 205: ...and separation rollers do not stick together at the start of a job just after the machine leaves standby mode When the feed roller reverses at the start of the job a small arm pushes the feed roller...

Page 206: ...section 6 11 5 There is no near near end sensor Near end is detected by counting the number of tray lift motor pulses that have been made while lifting the bottom plate When paper runs out a feeler dr...

Page 207: ...s Trays 2 and 3 can be set up for a wide range of paper sizes using the setting on the dial and a User Tool The service manual shows the range of settings that can be accepted Note SP 5112 however The...

Page 208: ...8 Anti condensation Heaters Service manual section 6 11 7 Note the locations of these two heaters They turn on automatically at the times mentioned in the manual In this machine the heaters are not op...

Page 209: ...at paper feed resumes Paper can be added to the left tray without interrupting copying Tandem Feed Tray Overview Service manual section 6 11 8 Overview Describe the tandem tray system see the slide De...

Page 210: ...Right tray lock solenoid releases the lock z The user can add paper to the left tray even while paper is feeding from the right tray Tray Lock and Release Service manual section 6 11 8 Connecting the...

Page 211: ...w the sensor at the bottom of the tray right tray paper end sensor saves time when checking if the tray has any paper or not before starting to lift the tray to the paper feed position Service manual...

Page 212: ...11 8 Paper Lift Remaining Paper Detection These four sensors detect the amount of remaining paper The mechanism is explained in the manual These sensors cannot detect when the tray is empty When the...

Page 213: ...section When paper runs out a feeler drops through the cutout in the bottom plate This is the same as for trays 2 and 3 Service manual section 6 11 8 Paper Lift Remaining Paper Detection previous page...

Page 214: ...n 6 11 8 Paper Lift Remaining Paper Detection end of the section When paper runs out the tray must be lowered so that the stack in the left tray can be moved across to the right tray The lift motor re...

Page 215: ...ly when the stack of paper in the left tray is moving across to the right tray Describe how the side fence solenoids open the side fences The side fence open sensor detects when the fences are open fu...

Page 216: ...ull the paper in the left tray is moved across to the right tray The rear fence drive motor pushes the paper stack into the right tray The return sensor detects when the fence is as far as it can go T...

Page 217: ...217 217 Tray Positioning Service manual section 6 11 9 Describe how the tray is locked in place This is the same for all three trays...

Page 218: ...ensor Detects paper end By pass Feed Table Feed Mechanism Paper End Detection Service manual section 6 11 10 Describe this briefly Notice the small stopper which prevents the user from pushing paper t...

Page 219: ...ted as 11 not as 14 the machine changes the detected paper size to 8 5 x 11 By pass Feed Table Paper Size Detection Service manual section 6 11 10 Describe the sensor briefly It is the same type as us...

Page 220: ...ice manual section 6 11 11 Overview The diagram shows the path of paper from all trays including the duplex unit and optional LCT The registration roller is driven by a motor dedicated to this task Th...

Page 221: ...ice manual section 6 11 11 Paper Registration Drive The registration roller has a dedicated motor instead of a clutch The shock of a clutch turning on can agitate the toner on the latent image This ca...

Page 222: ...hanism stops paper piling up when a jam has occurred in the vertical feed path before reaching the registration roller When a jam occurs here the next sheet is already on its way up from the paper tra...

Page 223: ...er size sensor output 1904 By pass tray paper size sensor calibration Do this after changing the by pass paper feed sensor board 1905 By pass clutch operation for thick paper mode By default the clutc...

Page 224: ...anual Service manual section 3 1 10 First make sure that the class is aware of the service notes for the paper feed components Tandem tray paper size change The users cannot do this themselves Don t f...

Page 225: ...n board removal z Separation roller pressure adjustment Registration and by pass units Pressure adjustment Note the use of this adjustment to solve feed problems at the feed in area By pass paper size...

Page 226: ...226 226 Move the positioning plate to adjust the side to side registration Tandem Feed Tray Side to side Registration Service manual section 6 11 8 Tray Side to side Positioning Note this adjustment...

Page 227: ...227 227 B246 SERIES TRAINING COPIER ENGINE TRANSFER AND SEPARATION Image transfer and paper separation mechanisms will be described in this section...

Page 228: ...s transferred to the copy paper the photoconductor surface is illuminated by a lamp This illumination functions in much the same way as the exposure process The light neutralizes some of the charge on...

Page 229: ...ning roller has its own cleaning mechanism a counter blade The toner collection coil in the transfer belt cleaning unit sends waste toner to the collection bottle The bottle contains a toner overflow...

Page 230: ...e manual section 6 10 2 Describe the mechanism The belt lift timing 500 ms after drum start is about the same time as the leading edge of the first sheet passes the registration sensor The transfer be...

Page 231: ...231 231 Belt Contact Mechanism 2...

Page 232: ...es the transfer roller output drops to 2 6KV and the cleaning roller output stays at 1000V When the job ends Whenever the drum motor is on but there is no toner image on the drum on the drum that is w...

Page 233: ...current to the transfer roller to maintain a small but constant current flow I3 to ground through the belt paper and drum If this current is not constant the toner transfer and paper separation effic...

Page 234: ...drive motor drives the transfer belt There is no transport fan because the belt attracts the paper electrostatically A separation corona is not necessary the paper separates from the belt when the be...

Page 235: ...ing than the application of a blade to the transfer belt The charge for cleaning is applied even during the interval between sheets of copy paper If the class asks why SP 2 964 is now a DFU not to be...

Page 236: ...anual section 6 10 7 Toner removed from the belt by the previous mechanism is transferred to the waste toner collection bottle In this model the agitator plate does not move from side to side no cam T...

Page 237: ...nsation Heater Below the transfer belt drive roller Service manual section 6 10 8 This is not an option in this model It is a standard part of the machine It switches on automatically at the times sta...

Page 238: ...thicker paper an increase in current may be necessary because the paper resistance is higher 2301 001 002 These are for the front and rear sides of duplex copying the service manual is not clear about...

Page 239: ...paper The fourth group La1 La4f Lc4f and Lc1 is for OHPs and is for the by pass tray only The example on the diagram shows the settings La1 La1f Lc1f and Lc1 The other groups of four La2 La2f Lc2f Lc...

Page 240: ...PTL is in section 3 6 6 REPLACEMENT Service manual section 3 8 Have the trainees remove and replace the parts in this section Remind them to follow all notes and cautions in the manual Service manual...

Page 241: ...241 241 B246 SERIES TRAINING COPIER ENGINE FUSING Fusing will be described in this section...

Page 242: ...wn to the inverter duplex unit or out to the copy tray or finisher The fusing and exit units have been made into separate modules which can be easily separated from each other This makes part replacem...

Page 243: ...control the fusing temperature The three thermostats are used to detect when the fusing unit temperature gets too high If a thermostat trips it must be replaced The thermistor at the end of the rolle...

Page 244: ...r The fusing pressure release motor controls the mechanism The fusing pressure release HP sensor detects the correct time to switch the motor off There is no pressure adjustment Pressure is applied or...

Page 245: ...ing A web coated in silicone oil is pressed against the hot roller Service manual section 6 12 4 The main point is on the slide The service manual points out the rollers in this web cleaning unit whic...

Page 246: ...o be switched on after each job if SP 1903 001 is turned on This may be necessary if a lot of paper dust is sticking to the fusing unit rollers If this feature is on the motor will run if the job is l...

Page 247: ...rvice manual section 6 12 5 The manual explains how to use this adjustment The manual contains some guidelines but it is not easy to recommend any one setting Only change the setting when wrinkling oc...

Page 248: ...248 248 The fusing duplex motor drives the hot roller The pressure roller is driven by friction with the hot roller Fusing Drive Mechanism Service manual section 6 12 6 Outline this mechanism...

Page 249: ...r see the next slide Service manual section 6 12 7 Copy speed automatically decreases if the user selects thick paper or OHP at the bypass tray This ensures that the image is fused properly because th...

Page 250: ...This sensor A is below the waste toner collection bottle B The copy speed automatically decreases if the hot roller temperature goes below a set value This set value is controlled by the room tempera...

Page 251: ...y for 0 5 s The CPU requires the mains frequency if phase control mode is active see Fusing Unit Control Modes Then the fusing lamps turn on Fusing Idling There is no fusing idling in this machine exc...

Page 252: ...252 252 The fusing exit motor drives the rollers Paper Exit Mechanism Drive Service manual section 6 12 9 Describe this briefly...

Page 253: ...253 253 The curl correction rollers remove curl produced during fusing Paper Exit Mechanism Curl Correction Service manual section 6 12 9 Describe this briefly...

Page 254: ...put tray or finisher z Down to the inverter and duplex unit Paper Exit Mechanism Junction Gate To Paper Exit To Inverter Duplex Service manual section 6 12 10 Show how the exit gate solenoid directs p...

Page 255: ...ms Normally the user will remove fusing unit jams But if SP 1159 is changed to on the machine stops if a jam occurs in the fusing unit for three consecutive paper feeds Then SC559 appears The technici...

Page 256: ...ing before fusing for OHP and thick paper default enabled SP Modes 1105 Fusing temperature adjustment There are separate adjustments for OHP and thick paper 1102 For duplex mode 1106 Displays the fusi...

Page 257: ...tions in the manual Service manual section 3 1 9 First make sure that the class is aware of the service notes for the fusing unit Thermistors and thermostats Note the cautions for reassembly copied fr...

Page 258: ...ect places the connectors on the lamps have colours white blue green The connectors on the machine also have the same colours Because of this it is not possible to make an error Also you can use the W...

Page 259: ...259 259 B246 SERIES TRAINING COPIER ENGINE DUPLEX The duplex mechanisms will be described The duplex tray is a standard component of this model...

Page 260: ...tandard part of the machine not an optional unit For face up output the page passes out of the fusing unit to the tray directly For face down output the page passes to the inverter before being fed ou...

Page 261: ...otor Drives the inverter Duplex inverter and transport motors Drive the duplex transport rollers Duplex Drive Mechanism Inverter Motor Transport Motor Fusing Duplex Motor Service manual section 6 13 2...

Page 262: ...ller Service manual section 6 13 3 If the paper exit mechanism directed the paper down towards the inverter the inverter feed roller passes it to the jogger unit The weight of the paper pushes down th...

Page 263: ...63 263 Jogger motor Moves the jogger fences Jogger home position sensor Detects the jogger fence home position Inverter Jogging Service manual section 6 13 3 Jogging ensures that the paper is straight...

Page 264: ...264 Reverse roller solenoid Lowers the reverse trigger roller Inverter Feed out 1 Reverse Trigger Roller Service manual section 6 13 3 The next two slides show how paper is fed out of the inverter un...

Page 265: ...t 2 Reverse Roller Inverter Exit Roller Service manual section 6 13 3 In the red circle it is not easy to see but the inverter sensor is just past the inverter roller so this sensor detects when the p...

Page 266: ...tray Duplex transport rollers Feed the paper into through and out of the duplex tray Duplex Tray Feed Mechanism Transport Rollers Service manual section 6 13 4 In duplex mode the junction gate switche...

Page 267: ...267 267 SP Modes 1008 Distance between the jogger fences SP Modes 1008 Distance between the jogger fences The SP table explains when to adjust this setting skewing or paper creasing...

Page 268: ...on 3 10 of the service manual Obey all notes and cautions in the manual Service manual section 3 10 Have the trainees do the procedures in this section Remind them to follow all notes and cautions in...

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