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Service Manual: Theory of Operation - Printers

Contents

1. 78 21 FUSING SEGUON 79 21 1 Gomposition Mite tei eere t pe Re re re REEL RES 79 21 2 Drive 80 VAECXNEG cip M 80 21 3 4 Fusing roller drive control 5 rentre 80 21 3 2 Fusing temperature control 83 21 38 Warm Up 83 24 34 N 84 21 35 Print control i rtr 84 21 3 6 PPM control enne 85 21 3 7 Protection against abnormally high temperature 22 Duplex section eese Theory of operation Ver 1 0 May 2008 22 15 CombpositioD icio ceci re choose est i dier ie Rea vnd 86 pov 87 22 3 EC 88 2231 E D C la E 88 22 3 2 Switchback guide movable mechanism 89 22 8 8 Media exit switching mechanism sse 90 22 3 4 Transport Media re feed mechanism eseeeeeee 92 23 Horizontal conveyance section nennen nennen 93 23 1 ComppositioDh nnne teme EE e RH etre E Pa 93 23 2 DVE 94 23 3 95 23 3 1 Tr nsport
2. 4138102121 0 Theory of operation Ver 1 0 May 2008 4 1 9 Media size detection control 4 Operations The media size switch detects the length size feed direction of the media 1 The size detection board turns as the trailing edge guide plate is moved 2 When the tray is slid into the main body the size detection board pushes the actua tor of the media size switch installed to the main body frame thus turning ON the switch 3 The combination of ON OFF positions of the sub switches of the media size switch determines the specific media size that can be either one of the seven different sizes Lower feeder media size switch ne SWi WS SWE Media size OFF ON ON Legal 8 5 x 14 ON ON ON Government legal letter plus ON ON OFF A4 ON OFF OFF Letter 8 5 x 11 ON OFF ON Executive OFF OFF ON B5 OFF OFF OFF Lower feeder unit not installed Actuator Size detection board Media size switch MS2 4138t02122c0 Trailing edge guide plate Lower feeder unit i 55 e 7 fe 9 4 Operations Theory of operation Ver 1 0 May 2008 4 1 10 Media reference position adjustment mechanism The edge guide plate can be moved to allow the print start reference position for the media to be adjusted 1 Through a hole in the media lift plate on top of the tray loose
3. 16 8 2 2 Laser exposure ProCess mrrrrrrerrersernaesenssnanssensnnonernssnessnnnenvanssensenene 16 8 2 3 Laser emission 17 8 2 4 Laser emission 17 8 2 5 Laser light intensity control 18 8 2 6 Registration correction control asvrnsnrennvrnrn vanner vennvrnnnvennnvennvensnrenvensnnne 18 9 Toner supply Section eerte tetro situato ener ttt hber asocio guis 19 9 1 Composition nennen nnne nene nennen inneren 19 92 DNG aan 20 9 3 21 9 3 1 Toner CONVEYING mechanism essere 21 9 3 2 Toner collecting port shutter mechanism 22 9 3 3 Toner replenishing mechanism esses 23 9 3 4 Toner level detection nino tno tnit nnt tpi tnter 24 re z 5 o i 2 amp D G E RS 7 9 7 E 9 magicolor 4690MF 0 7 Q 7 fe 2 iS Theory of operation Ver 1 0 May 2008 9 3 5 Toner near empty condition detection esee 24 9 3 6 Toner empty condition detection 25 9 3 7 Toner empty condition detection control 9 3 8 Toner
4. see 35 13 23 Toner TOW cin ce oreet rb keen tad ER Cea LAG 36 13 2 4 Developing system esee enne nne nnne nnne 37 19 2 5 Cleaning Mechanism onere enero rra ctr 38 13 2 6 Toner collecting port shutter mechanism 1 38 14 Transfer section 1st 1 5 nennen 39 IEEE Nc Em 39 40 14 3 41 14 3 1 1sttransfer output control 14 3 2 1sttransfer roller pressure retraction control 14 3 3 1sttransfer roller pressure operation 42 14 3 4 1sttransfer roller retraction Operation ou eee 43 Theory of operation Ver 1 0 May 2008 14 8 5 1sttransfer roller pressure retraction position 44 14 3 6 Transfer belt cleaning 45 14 3 7 1sttransfer belt cleaning 46 14 3 8 1sttransfer belt backward rotation 46 14 3 9 Toner collecting port shutter mechanism seen 47 15 Transfer section 2nd transfer srrnvnonrrnvnnnrnnrnnnnnnvnnnnrnrrnvnrnrrnvnrnrenrnrnnrnrernnsnsensne 48 15 4 COm
5. 7 fo Return mirror 1st G1 lens Synthetic mirror 4138t02002c0 Semiconductor laser Polygon mirror 15 8 Write section Theory of operation Ver 1 0 May 2008 8 2 Operation 8 2 1 Overview Four semiconductor lasers provided one for each of the four different colors A single polygon motor is used to make a scan motion Each photo conductor is irradiated with a laser light so that an electrostatic latent image is formed on it magicolor 4690MF 8 2 2 Laser exposure process 1 The laser light emitted by each of the semiconductor laser Y M C and K is reflected onto the polygon mirror via the synthetic mirror 2 Since the angle of incidence for each color of laser light varies the laser light reflected by the polygon mirror is reflected at a different angle for each color 3 The condensing angle of each color of laser light is corrected by the G1 lens before reaching each return mirror 4 The K laser light is condensed on the surface of the photo conductor through the separation mirror and G2 lens 5 The Y M or C laser light is condensed on the photo conductor through the separa tion mirror G2 lens and return mirror Index sensor SOS lens G1 lens 0 7 Q 7 fe fet iS Separation mirror Polygon mirror Return mirror 1st Sem
6. semiconductor laser Maximum power of the laser diode 15 mw Wavelength 770 800 nm Denmark ADVARSEL Usynlig laserstraling ved abning nar sikkerhedsafbrydere er ude af funktion Undga udseettelse for str ling Klasse 1 laser produkt der opfylder IEC60825 1 sikkerheds kravene halvlederlaser Laserdiodens h jeste styrke 15 mW b lgel ngden 770 800 nm SAFETY AND IMPORTANT WARNING ITEMS Finland Sweden LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT VAROITUS Laitteen kayttaminen muulla kuin tassa k ytt ohjeessa mainitulla tavalla saat taa altistaa kayttajan turvallisuusluokan 1 ylittavalle n kym tt m lle laser s teilylle puolijohdelaser Laserdiodin suurin teho 15 mW aallonpituus 770 800 nm VARNING Om apparaten anv nds p annat s tt i denna bruksanvisning specificerats kan anv ndaren uts ttas f r osynlig laserstralning som verskrider gr nsen f r laserklass 1 halvledarlaser Den maximala effekten f r laserdioden 15 mW v gl ngden 770 800 nm VARO Avattaessa ja suojalukitus ohitettaessa olet alttiina n kym ttom lle laser s teilylle Ala katso s teeseen VARNING Osynlig laserstr ining n r denna del r ppnad och sp rren r urkopplad Betrakta ej str ien Norway ADVERSEL Dersom apparatet brukes pa annen mate enn spesifisert i d
7. 7 9 Registration roller y Media fed from duplex Actuator GP 4 Registration sensor PS4 Media from tray 1 2 3 A011T2C572AA 75 20 Conveyance section Registration roller Theory of operation Ver 1 0 May 2008 20 3 3 Control of loop formed before registration roller Media conveyance is stopped after the lapse of a predetermined period of time after the leading edge of the media fed from the feed roller has reached the registration roller This forms a loop in the media The loop in the media corrects skew in the media magicolor 4690MF Registration roller NS Media A011T2C573AA 0 7 Q 7 fe 2 iS 20 3 4 Media neutralization The charge neutralizing cloth neutralizes any charge left in the media after the 2nd trans fer process The charge residue is grounded through the charge neutralizing cloth to the main body frame Charge neutralizing cloth 4138102102 0 2nd transfer roller 76 Theory of operation Ver 1 0 May 2008 20 Conveyance section Registration roller 20 3 5 OHP transparencies detection control To prevent incorrect prints on OHP transparencies the type of the media being conveyed is detected by the OHP sensor The OHP detection is made after the
8. n rennen tno notato dai kdo nao 5 4 1 Document feed 5 4 1 1 Document feed mechanism 5 4 1 2 Document separation mechanism essen 6 4 2 Document transport exit mechanism esee 7 4 2 1 Document transport mechanism essen 7 4 2 2 Document exit mechanism nennen nennen 8 4 2 3 Switching mechanism for turnover paper 9 4 3 Paper 10 4 3 1 1 sided mode trt rino 10 4 3 2 Pn sme EE 11 4 4 MiSCellari amp OlUs Senet 4 4 1 Document feeder raised lowered position detection mechanism Auto Document Feeder Unit RS 7 Q 9 n E 9 Theory of operation Ver 1 0 May 2008 yun Jepee4 oiny Blank Page Theory of operation Ver 1 0 May 2008 1 Product Specifications Outline Se 1 Product Specifications ES GE a ke A Type S B Em Name Automatic Document Feeder lt Installation Inserted at upper rear side of main body Document alignment Center Document loading Face up B Functions Modes
9. A011T2C046DA 58 Theory of operation Ver 1 0 May 2008 16 Waste toner collecting section 16 3 7 Waste toner box in position detection mechanism The waste toner box set detection lever is provided to detect a waste toner box loaded in position When the waste toner box is not loaded the set detection lever lowers by its own weight to plug the set detection window The protrusion provided in the front door interferes with the set detection lever that plugs the set detection window Then the front door cannot be closed When the waste toner box is loaded in position it pushes up the set detection lever to uncover the set detection window Setdetection lever 33 OT 9 Set detection window aL e amp gt MEN mu fn A011T2C047DA 16 3 8 Waste toner flow in the waste toner box 1 Toner conveyed to the toner collecting port is conveyed to the 2nd conveyance screw by the 1st conveyance screw provided in the waste toner box he toner is conveyed into the waste toner box by the 2nd conveyance screw 2 In order for waste toner to be accumulated from the left side the waste toner box has the dividi
10. I O Interfaces 10Base T 100Base TX IEEE 802 3 Ethernet interface port USB Revision 2 0 and USB Revision 1 1 compliant port NOTE These specifications are subject to change without notice 2 1 Faxspecifications Resolution Standard 203 dpi x 98 dpi Fine 203 dpi x 196 dpi Super fine 203 dpi x 392 dpi Halftone level Standard Fine Super fine Halftone standard Halftone fine Halftone super fine Receive Supported Automatic reduction Transmit Supported Compatibility ECM Super G3 Modem speed V 34 up to 33 6 Kbps Transmit speed 3 second page at V 34 Compression MH MR MMR JBIG Memory for receiving 6 MB for Fax RX approx 250 pages included in 32 MB NAND flash Remote setting Available via Tel line and USB Paper size A4S LegalS LetterS Paper type Plain paper recycled paper Speed dial 220 Group dial 20 groups 50 destination stations for one group Functions Broadcast Available maximum 255 stations Speed dial 220 stations full dial 16 stations Other supported Timer transmission address book real time clock auto functions redial reduce split smoothing Theory of operation Ver 1 0 May 2008 3 Section configuration 3 Section configuration 2 Auto document feeder Horizontal conveyance section Scanner section 5 o i 2 9 amp D G E using section
11. 44 Theory of operation Ver 1 0 May 2008 14 Transfer section 1st transfer 14 3 6 Transfer belt cleaning mechanism To scrape residual toner off the surface of the transfer belt the transfer belt is provided with a cleaning blade The cleaning blade is in pressed contact with the transfer belt at all times That is it cleans the surface of the transfer belt as long as the belt turns The toner scraped off by the cleaning blade is collected to the middle of the transfer belt by the toner collecting screw The collected waste toner is conveyed through the waste toner collecting port located at the middle of the transfer belt unit and the suction transport unit and brought to the waste toner box magicolor 4690MF Cleaning blade Transfer belt Toner collecting screw 413810203501 0 7 9 7 s 9 Waste toner 7 collecting port q Toner collecting screw A011T2C034DA 45 14 Transfer section 1st transfer Theory of operation Ver 1 0 May 2008 14 3 7 1st transfer belt cleaning control fthere is a possibility of the main body being stopped with toner left on the surface of the transfer belt between the cleaning blade position and the 2nd transfer position due to a media misfeed or malfunction the Transport motor is energized to turn the transfer belt The residual toner is thereby removed from
12. 7 fe iS Developing motor A011T2C013DA Photo conductor Replenishing screw eo Agitating screw 1 Cleaning blade Supply roller Charge corona Developing roller Toner collecting screw A011T2C014DA 26 Theory of operation Ver 1 0 May 2008 10 Print unit section overall composition 10 2 Operation 10 2 1 Print unit life detection Based on the photo conductor driving time the cartridge life is determined When the photo conductor driving time reaches its near life the near life warning mes sage appears When the photo conductor driving time reaches its life time the life warning message appears f the photo conductor runs more than its life a life end warning message appears When the warning message appears you cannot print The life end message can be reset when the print unit is replaced magicolor 4690MF 10 2 2 Print unit life control Each print unit is provided with a PU detection board that detects state of a toner car tridge placement a new PU a print unit life The main body attempts to perform a detection sequence when the front door is closed When a cartridge is detected as a new one an image stabilization sequence starts 0 7 Q 9 7 E 9 27 11 Print unit sec
13. Lever indicator indicating the media supply level Media lift plate A media empty condition S er 4138102117c0 When media 4138t02118c0 is loaded 4 1 6 Media empty condition detection control The media empty message is displayed on the panel when the empty sensor actuator unblocks the media empty sensor No mechanism is provided for detecting a media near empty condition The media sup ply level indicator serves this purpose When media Actuator is loaded x o Media empty sensor PS1 Media A media empty condition Media lift plate 4138to2119c0 Lower feeder unit 0 7 Q 9 7 E s 9 4 Operations Theory of operation Ver 1 0 May 2008 4 1 7 Edge guide plate E The edge guide plate can be slid to the exact size in the width direction of the media to E be loaded A4 B5 8 12 8 o FR E ES Edge guide plate St 41380212050 4 1 8 Trailing edge guide plate 0 7 Q N fe fet iS The trailing edge guide plate can be slid to the exact size in the length direction of the media to be loaded 14 inch 13 inch 127 10 inch A4 11 101 2 inch B5 Trailing edge guide plate
14. OUTLINE Explanation of system configuration product specifications unit configuration and paper path COMPOSITION OPERATION Explanation of configuration of each unit operating system and control system Field service section OUTLINE Explanation of system configuration and product specifications MAINTENANCE Explanation of service schedule maintenance steps ser vice tools removal reinstallation methods of major parts and firmware version up method etc ADJUSTMENT SETTING Explanation of utility mode service mode and mechanical adjustment etc TROUBLESHOOTING Explanation of lists of jam codes and error codes and their countermeasures etc APPENDIX Parts layout drawings connector layout drawings timing chart overall layout drawing are attached C 1 Notation of the service manual A Product name In this manual each of the products is described as follows 1 magicolor 4690MF Main body 2 Microsoft Windows NT 4 0 Windows NT 4 0 or Windows NT Microsoft Windows 2000 Windows 2000 Microsoft Windows XP Windows XP Microsoft Windows Vista Windows Vista When the description is made in combination of the OS s mentioned above Windows NT 4 0 2000 Windows NT 2000 XP Vista B Brand name The company names and product names mentioned in this manual are the brand name or the registered trademark of each company C Feeding direction When the long side of the paper is parallel with the feeding direct
15. 2 Rotation of the 1st image transfer pressure retraction clutch turns the pressure cam which moves the sliding plate 3 Asthe sliding plate moves the retraction lever turns 4 Asthe retraction lever turns the 1st transfer roller is pressed against the transfer belt magicolor 4690MF Sliding plate Pressure cam Retraction lever 1st transfer roller 0 7 Q N fe 2 iS Photo conductor 4138t02044c1 42 Theory of operation Ver 1 0 May 2008 14 Transfer section 1st transfer 14 3 4 1st transfer roller retraction operation 1 Rotation of the Transport motor is transmitted by a gear train to the 1st image trans fer pressure retraction clutch 2 Rotation of the 1st image transfer pressure retraction clutch turns the pressure cam which moves the sliding plate 3 Asthe sliding plate moves the retraction lever turns 4 Asthe retraction lever turns the 1st transfer roller is retracted from the transfer belt magicolor 4690MF Sliding plate Pressure cam Retraction lever 1st transfer roller g 7 Q 9 7 9 Photo conductor 4138102045 1 43 14 Transfer section 1st transfer Theory of operation Ver 1 0 May 2008 14 3 5 1st transfer roller pressure retraction position control A Pressure position control The
16. 7 s 9 Switchback roller CLOSE mode Media exit roller A011T2C538AA 91 22 Duplex section Theory of operation Ver 1 0 May 2008 22 3 4 Transport Media re feed mechanism Duplex transport section is driven by the fusing motor Transportation is controlled by the transport roller clutch Duplex transport sensor controls the stop position of the media at media re feeding and detects JAM magicolor 4690MF Duplex transport roller clutch Fusing motor Duplex transport sensor A011T2C539AA 0 7 Q N fe iS 92 Theory of operation Ver 1 0 May 2008 23 Horizontal conveyance section 23 Horizontal conveyance section 23 4 Composition magicolor 4690MF AOFDT2C516AA Transport roller 4 Transport roller 3 Transport roller 1 2 E 9 Transport roller 2 Switchback sensor 2 5 O 2 506 Switchback sensor AOFDT2C505AA 93 23 Horizontal conveyance section Theory of operation Ver 1 0 May 2008 23 2 Drive magicolor 4690MF Fusing roller AOFDT2C504AA Rs 7 Q N fe fet iS 94 Theory of operation Ver 1 0 M
17. Cold start 58 seconds Sleep mode to ready 40 seconds Power on to ready at ambient temperature of 23 C 73 4 F and rated source voltage Process speed 144 mm sec plain paper Monochrome full color mode 72 mm sec thick paper OHP Monochrome full color mode First page out time 18 0 second Full color mode A4S LetterS 1 sided mode plain paper Print speed 24 pages min A4S 1 sided print plain paper 25 pages min LetterS 1 sided print plain paper 12 pages min A4S 1 sided print thick paper 12 5 pages min LetterS 1 sided print thick paper Theory of operation Ver 1 0 May 2008 2 Product specifications C Media Paper source maximum tray capacity 1 2 pi o Plain paper 8 60 to 90 16 to 24 Ib 100 sheets 250 sheets Thick 1 91 to 150 g m E Thick 2 151 to 210 g m OHP Label Medie type Letterhead 20 sheets Transparencies Glossy 1 100 to 128 g m Glossy 2 129 to 158 g m Postcard Envelope 10 sheets Width 92 to 216 mm 92 to 216 mm Media 3 6 to 8 5 inch 3 6 to 8 5 inch dimensions Paneth 148 to 356 mm 148 to 297 mm 9 5 8 to 14 0 inch 5 8 to 11 7 inch D Maintenance E Machine specifications Voltage AC 100V 120 V 220 to 240 V Frequency 50 to 60 Hz 3 Hz 1 250 W or less 25 W less Energy saver mode 539 W x 590 D x 578 H mm 21
18. Transfer section Duplex section N SE V Print unit section Toner collection section Media feed section Tray 1 Write section Media feed section Tray 2 Media feed section Tray 3 AOFDT1C501AA 4 Media path Theory of operation Ver 1 0 May 2008 4 Media path 5 o Y fe E o ae o QU 5 35 EEEE T D jr er DN 0 AOFDT2C511AA Theory of operation Ver 1 0 May 2008 5 Image creation process 5 Image creation process CCD Photoelectric conversion Bw Image processing board z 5 o i 9 2 D G E oY Ry N Transfer belt cleaning Tet image Da FI 1e re i 2nd image transfer T d OG P E exposure AOFDT2C512AA 1 Light reflected off the surface of the original is converted to a corre CCD Photoelectric E sponding electric signal by CCD and the resultant electric signal is conversion sent to the image processing board TS The intensity of the la
19. 7 E 9 Cleaning sheet 4138102012 2 4138102012 1 Print unit Print unit 9 3 7 Toner empty condition detection control A sequence is started for detecting a toner empty condition when a toner near empty condition is detected In starter cartridges shipped with a main body the toner empty detection control always functions The main body determines that there is a toner empty condition when the toner level sensor output value remains below a predetermined value and if the following event is detected a predetermined number of consecutive times the output value of the toner level sensor remains a predetermined value or lower for more than a predetermined period of time The consecutive detection count is retained even when power is turned OFF Atoner empty condition is reset when a new toner cartridge is detected 9 3 8 Toner cartridge life control Each toner cartridge is provided with a TC detection board that detects state of a toner cartridge placement a new TC a toner near empty condition and a toner empty condi tion 25 10 Print unit section overall composition Theory of operation Ver 1 0 May 2008 10 Print unit section overall composition 10 1 Composition magicolor 4690MF A011T2C526AA PC motor PU detection board esI tt 0 7 Q
20. KONICA MINOLTA SERVICE MANUAL magicolor 4690MF 2008 05 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 THEORY OF OPERATION TOTAL CONTENTS SAFETY AND IMPORTANT WARNING ITEMS esee 1 IMPORTANT NOTICE 1 DESCRIPTION ITEMS FOR DANGER WARNING AND CAUTION S 1 SAF EIN WARNINGS 0 S 2 WARNING INDICATIONS ON THE MACHINE nennen S 19 MEASURES TO TAKE IN CASE OF AN ACCIDENT 5 22 Composition of the service manual C 1 Notation of the service manual nennen C 2 magicolor 4690MF main body OUTING E 1 Composition Operation 9 Auto document feeder unit ahi t eR E RE 1 Combposition operatlOn uten coe t ete t deve bet d ge e e ea 3 Lower feeder unit Outline iR Rebeca wen RES 1 Compositior Operatlor aker eneeier aati an Eve e Ra DRE 3 Blank Page SAFETY AND IMPORTANT WARNING ITEMS SAFETY AND IMPORTANT WARNING ITEMS Read carefully the safety and important warning Items described below to understand them before doing service work IMPORTANT NOTICE 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 str
21. 25 1 4 Theory of operation Ver 1 0 May 2008 Image stabilization control execution request A request for execution of the complete correction control simplified correction control or individual registration control is made at the following timing Stabilization request timing Stabilization request detection timing Execution processing When a new IU is detected When the power switch is Complete correction body status When there is a temperature change inside the PH unit When the front right door is closed At the end of a job dur ing a job When the sleep mode is deactivated Upon When a other used IU is turned ON control replace detected ment of unit When the transfer belt unitis When the front right door is Complete correction replaced closed control When the power switch is Power the switch is turned Depending on each condi turned ON ON tion When there is a great change Power the switch is turned in environmental conditions ON When the front right door Complete correction from those when the last sta is closed At the end of a job aes control bilization sequence was exe When the sleep mode is cuted deactivated By main individual registration con trol At the end of a print cycle of given conditions At the end of a job Simplified correction control When a malfunction is reset When the power switch is turned ON Complete correction co
22. 3 Thermostat protection A 1st stage soft protection Ifthe thermistor 1 or the thermistor 2 detect a temperature exceeding a predetermined value the malfunction code representing abnormally high temperature is displayed At this time the heater lamps are turned OFF forcibly and the initiation of any new print cycle is prohibited abnormally high temperature detection control B 2nd stage hard protection The following hard protection control is provided if the CPU overruns and becomes unable to detect an abnormally high temperature 1 The thermistor 1 or thermistor 2 detect a temperature exceeding a predetermined value 2 The remote signal for the corresponding heater lamp of the DC power supply is forcibly turned OFF through the MFP board 3 The triac circuit on the DC power supply is turned OFF to shut down the power sup ply to the corresponding heater lamp 4 The heater lamp is forcibly turned OFF 5 The temperature detected by the thermistor 1 or thermistor 2 is decreased to a level below the predetermined value 6 The remote signal forcible OFF of the corresponding heater lamp is reset so that power supply to the heater lamp is resumed C 3rd stage Thermostat protection f neither the soft protection nor hard protection can detect an abnormally high tempera ture due to a defective thermistor the thermostat operate at the specified temperature This shuts down the power supply to the fusing heater lamp thus forcibly
23. pinched by a table and so on Overheating may occur there leading to a risk of fire Check whether the power cord is damaged Check whether the sheath is damaged If the power plug cord or sheath is damaged replace with a new power cord with plug and connector on each end specified by KMBT Using the damaged power cord may result in fire or electric shock Do not bundle or tie the power cord Overheating may occur there leading to a risk of fire 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 NG The risk of electric shock exists When unplugging the power cord grasp the plug not the cable The cable may be broken leading to a risk of fire and electric shock S 5 SAFETY AND IMPORTANT WARNING ITEMS Wiring NWARNING Never use multi plug adapters to plug multiple power cords in the same outlet If used the risk of fire exists When an extension cord is required use a specified one Current that can flow in the extension cord is limited so using a too long extension cord may result in fire Do not use an extension cable reel with the cable taken up Fire may result 2 Installation Requirements Prohibited Installation Places NWARNING Do not plac
24. than those indicated may result in burns AOFDPOC503DA S 19 SAFETY AND IMPORTANT WARNING ITEMS MICI MJEUKMBMBIEH E 1 dents This area generates high we val voltage com EEREN Be careful not to touch here when the power is turned ON to avoid getting an elec tric shock EUKMBMB9TH A zuo This area generates high voltage Be careful not to touch here when the power is turned ON to avoid getting an elec tric shock AOFDPOC504DA 5 20 SAFETY AND IMPORTANT WARNING ITEMS WARNING AVVISO Ne Iz WARNUNG AVISO Se ATENCI N ATTENTION Do not burn used Print Units Toner expelled from the fire is dangerous A WARNING A AVVISO A WARNUNG A AVISO AN ATENCI N ATTENTION Do not burn used Waste Toner Bottle Toner expelled from the fire is dangerous Do not burn used Toner Cartridge Toner expelled from the fire is dangerous AOOFPOC504DA 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 Do not remove caution labels And also when the caution label is peeled off or soiled and cannot be seen clearly replace it with a new caution label S 21 MEASURES TO TAKE IN CASE OF AN ACCIDENT MEASURES TO TAKE IN CASE OF AN ACCIDENT 1 accident has occurred the distri
25. 5 Media empty condition detection 68 18 8 6 open close detection control 69 18 3 7 Media misfeed detection 1 69 19 Conveyance section IDC sensor 70 19 1 GompoSitiOI Ern o 70 19 171 DEVO ctr 71 19 2 Operation 71 19 2 1 Toner density detection 71 19 2 2 IDC sensor calibration control 72 19 2 3 IDC sensor shutter mechanism 72 20 Conveyance section Registration roller eee 73 2071 GompositioDi E A 7 UPDATE METTE 74 20 3 OperatiOm sess S 75 20 3 1 Conveyance speed control 75 20 3 2 Registration roller 75 20 3 3 Control of loop formed before registration 76 20 3 4 Media neutralization eese eene 76 20 3 5 transparencies detection control see 77 20 3 6 Media size error detection 78 20 3 7 Temperature humidity sensor
26. A011T2C019DA 33 13 Print unit section developing Theory of operation Ver 1 0 May 2008 13 2 Operation 13 2 1 Developing drive control Polygon motor magicolor 4690MF Transport motor Color PC drum motor M2 Color PC drum motor M1 K developing motor M5 Chargek Charge YMC_ S 1 E Developing Y E Developing J m 3 Developing S E e s Developing K J 1st transfer pressure J 1st transfer rem 1 2nd transfer pressure J 2nd transfer rem a A011T2C575AA 34 Theory of operation Ver 1 0 May 2008 13 Print unit section developing 13 2 2 Toner collecting port shutter mechanism The toner collecting port is equipped with a shutter mechanism that prevents toner from being spilled out when the print unit is removed from the main body After installing the print unit and the toner cartridges into the main body locking the print unit release lever opens the collecting port shutter Then toner can be replenished from the toner cartridges Moving the print unit release lever to the right or left accompanies the synchronizing movement of the slider This makes the shutter opened or closed To prevent the front door from getting closed while the shutter is open the preventive mechanism works in the way that the front door cannot be closed by interfering with the release lever
27. B Media type Media size B5S JIS Executive LetterS A4S Letter Plus G Legal Legal Media type Plain paper 60 to 90 g m 16 to 24 Ib Recycled paper 60 to 90 g m 16 to 24 Ib Capacity 500 sheets C Machine specifications Power Requirements DC 24 V 10 supplied from the main body DC 5 V 5 Max Power Con 16W sumption Dimensions 469 mm W x 536 mm D x 111 5 mm H 18 5 inch W x 21 0 inch D x 4 5 inch H Weight Approx 6 5 kg 14 25 Ib D Operating environment Temperature 10 to 35 C 50 to 95 F with a fluctuation of 10 C h 18 F h Humidity 15 to 85 with a fluctuation of 20 h NOTE These specification s are subject to change without notice c l o o i o o 1 Product specifications Theory of operation Ver 1 0 May 2008 o o 5 Blank Page Theory of operation Ver 1 0 May 2008 2 Overall composition Composition Operation 2 Overall composition Lower feeder unit AOOTT2C506AA Vertical transport roller Media feed sensor PS3 7 Q 9 7 fo 2 ransp rt motor M1 Media empty sensor PS1 AOOTT2C504AA Media lift plate Separation roller 2 50 Lower feeder unit 0 o Q N fe fet iS 3 Drive Th
28. Duplex 5 Leser drive board amp i 2 E TC Y TC M TC C TC K PU Y PU M PU C PU K E Control system line umb Image bus line AOFDT2E501AA 10 Theory of operation Ver 1 0 May 2008 7 Scanner section 7 Scanner section 7 1 Composition Exposure lamp LA1 magicolor 4690MF Scanner home sensor PS100 AOFDT2C514AA AOFDT2C515AA 0 7 Q 9 7 fo Original cover sensor 85100 RIA 11 7 Scanner section Theory of operation Ver 1 0 May 2008 7 2 Drive magicolor 4690MF Inverter board INVB AOFDT2C503AA 0 7 Q N fo fet iS 12 Theory of operation Ver 1 0 May 2008 7 Scanner section 7 3 Operation 7 3 1 When the Start key is pressed A Original reading mode 1 Original cover mode 1 When the start key is pressed the scanner unit moves to the home position at which the scanner home sensor is activated 2 The scanner unit moves to the shading correction position 3 The operations of steps 1 and 2 are repeated twice 4 During the third operation the scanner unit moves from the shading correction position to the leading edge position of the image and starts reading the image of the original 5 The scanner unit completes its image reading sequence at the trailin
29. HSH o 9 BS FAA 4034 7405 VORSICHT KLASS ABDI ol ae THE BEAM AOFDPOE501DA S 17 SAFETY AND IMPORTANT WARNING ITEMS 5 4 PRECAUTIONS FOR HANDLING THE LASER EQUIPMENT When laser protective goggles are to be used select ones with a lens conforming to the above specifications When a disassembly job needs to be performed in the laser beam path such as when working around the printerhead and PC Drum be sure first to turn the printer OFF If the job requires that the printer be left ON take off your watch and ring and wear laser protective goggles A highly reflective tool can be dangerous if it is brought into the laser beam path Use utmost care when handling tools on the user s premises The Print Head is not to be disassembled or adjusted in the field Replace the Unit or Assembly including the Control Board Therefore remove the Laser Diode and do not perform Control Board trimmer adjustment S 18 SAFETY AND IMPORTANT WARNING ITEMS WARNING INDICATIONS ON THE MACHINE Caution labels shown 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 e This area generates high voltage Be careful not to touch here when the power is turned ON to avoid getting an electric shock The area around the Fuser Unit is extremely hot Touching any part other
30. clutch CL3 magicolor 4690MF Registration roller Transport roller A011T2C571AA Rs Q N fo fet iS 74 Theory of operation Ver 1 0 May 2008 20 Conveyance section Registration roller 20 3 Operation LL 20 3 1 Conveyance speed control 8 The Transport motor provides drive for the conveyance section 5 The conveyance speed is variable in two steps and the appropriate one is selected 8 according to the media type and print mode as detailed below Media type print mode Conveyance speed Plain media 144 mm s Thick stock envelopes postcards label OHP transparencies glossy paper 72 mm s 20 3 2 Registration roller control When the media taken up and fed in by the feed roller reaches the registration roller a loop is formed in the media and media conveyance is temporarily stopped Conveyance skew is corrected by this loop The registration sensor detects whether or not the media has reached the registration roller The media fed in is synchronized with the image before media conveyance is restarted A Media detection control When the media fed from the feed roller pushes up the actuator of the registration sen Sor the sensor is unblocked With this event occurring the main body determines that the media has reached the position before the registration roller S 7 Q 9
31. convey ance section It is then transported into the duplex section via the switchback roller Switchback sensor PS30 psc dado C Switchback guide Switchba k guide a Duplex AOFDT2C522AA 88 Theory of operation Ver 1 0 May 2008 22 Duplex section 22 3 2 Switchback guide movable mechanism The movable lever rotates driven by the fusing motor to push down the switchback guide When the guide reaches to the bottom the lever cannot be driven due to the torque lim iter between the movable lever axis and the gear The guide goes back to the upper posi tion with the spring that rotates the gear backward and pushes up the switchback guide magicolor 4690MF Movable lever Torque limiter Media exit direction Switchback direction A011T2C541AA g 7 Q 9 7 E 9 89 22 Duplex section Theory of operation Ver 1 0 May 2008 22 3 3 The position of the switchback guide and normal reverse rotation of the switchback roller are controlled with the combination of the two clutches DUP normal rotation clutch and DUP reverse rotation clutch Both clutches cannot be turned ON at the same time When the switchback roller rotate forward the switchback guide OPEN while the switch over Media exit switching mechanism magicolor 4690MF guide CLOSE when
32. energized Exit roll Exit roller Retraction solenoid AOFDT2C608AA Auto Document Feeder Unit 9 7 9 4 Mechanical operations Theory of operation Ver 1 0 May 2008 4 3 Paper path 4 3 1 1 sided mode When the start key is pressed take up and feeding of the original will be started by the transport motor and take up clutch The original that has been taken up and fed in is transported to the exit tray by way of the registration roller and exit roller Auto Document Feeder Unit AOFDT2C609AA Rs 7 Q 7 fe 2 iS 10 Theory of operation Ver 1 0 May 2008 4 Mechanical operations 4 3 2 2 sided mode 1 The fist side of the original will be read 2 The exit roller turns backward to feed the original back into the document feeder Auto Document Feeder Unit AOFDT2C610AA 3 The original that has been taken up again from the exit tray is transported up to the document scanning position by way of the registration roller 4 As soon as the original reaches the document scanning position a read sequence of the second side of the original will be started 5 The original that has been read is fed into the exit tray via the exit roller At this time the exit rolls are moved away f
33. for safety and important warning items are defined as follows Precaution when servicing the A IN product General Electric hazard High temperature precaution Prohibition when servicing the Q Q product General Do not touch Do not prohibition with wet hand disassemble when servicing the Q product General Unplug Ground Earth instruction S 1 SAFETY AND IMPORTANT WARNING ITEMS SAFETY WARNINGS 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 For this reason unauthorized modifications involve a high risk of degradation in performance and safety Such modifications are therefore strictly prohibited the points listed below are not exhaustive but they illustrate the reason ing behind this policy Prohibited Actions NDANGER Using any cables or power cord not specified by KMBT Using any fuse or thermostat not specified by KMBT Safety will not be assured leading to a risk of fire and injury Disabling fuse functions or bridging fuse terminals with wire metal clips so
34. is detected when the empty sensor actuator unblocks the tray1 media empty sensor No mechanism is provided for detecting a media near empty condition The media sup ply level indicator serves this purpose magicolor 4690MF Actuator Tray1 media empty sensor A011T2C577AA Rs 7 Q o lt N fe 9 64 Theory of operation Ver 1 0 May 2008 18 Media feed section Tray 2 18 Media feed section Tray 2 18 1 Composition magicolor 4690MF AOFDT2C520AA Empty sensor actuator Feed roller ABE 1 Edge guide plate Separation roller 0 7 Q 9 7 Trailing edge guide plate A011T2C558AA Transport motor M3 Tray2 media empty sensor PS1 Media level indicator lever A011T2C552AA 65 18 Media feed section Tray 2 Theory of operation Ver 1 0 May 2008 18 2 Drive Transport motor M3 Tray2 media feed clutch CL1 magicolor 4690MF Feed roller A011T2C551AA 18 3 Operation 18 3 1 Media lift plate mechanism The media lift plate is pressed down into the locked position in which the media is l
35. of operation Ver 1 0 May 2008 4 1 2 Document separation mechanism Double feeding of paper is prevented using coefficient of friction between the feed roller and separator pad oz ES ac 8 ur 5 lt Feed roller Q Separator pad AOFDT2C604AA Q 2 Single sheet feeding The coefficient of friction on the front side of the paper fed between the take up roller and separator pad is equal to that on the backside of the paper This allows the take up roller to transport the paper Multiple sheet feeding The coefficient of friction between the paper and separator pad is greater than that between sheets of paper This allows only the first sheet of paper to be transported by the take up roller Single sheet feeding Multiple sheet feeding I SS E 1382M009AA Theory of operation Ver 1 0 May 2008 4 2 4 2 1 Document transport exit mechanism Document transport mechanism 4 Mechanical operations The transport roller turns to transport the original that has been taken up onto the docu ment scanning position of the printer The transport motor drives the transport roller through a gear train When the original reaches the document scanning position the registration sensor mounted on the relay board is unblocked by the actuator which causes the printer to determine that there is an original Transport motor M1 AOFDT2C605
36. post exposure control is not performed due to a media misfeed or malfunction the entire surface of the photo conductor is exposed to light at the same time that the 2nd transfer roller cleaning control is performed during the recovery proce dure from the media misfeed or malfunction 11 3 4 Photo conductor small amount rotation control Ozone stagnant in areas near the charge corona unit reduces sensitivity of the photo conductors causing white bands to occur in the image To prevent this image problem the photo conductor is turned so as to allow its surface facing the charge corona unit to deviate thereby preventing the surface sensitivity from being reduced 0 Q 7 fe 2 30 Theory of operation Ver 1 0 May 2008 12 Print unit section charge corona 12 Print unit section charge corona 12 1 Composition magicolor 4690MF Charge corona A011T2C526AA A011T2C017DA hy 7 Q 9 7 E Grid mesh Electrode A011T2C018DA 31 12 Print unit section charge corona Theory of operation Ver 1 0 May 2008 12 2 Operation 12 2 1 Charge corona unit ON OFF control Polygon motor semiconductor laser magicolor 4690MF Transport motor M3 Color PC drum motor M2 Color developing motor M1 K devel
37. pressure and retraction operation of the 1st transfer roller is controlled as the 1st image transfer retraction position sensor detects the movement of the sliding plate 1 The 1st image transfer pressure retraction clutch is energized 2 The sliding plate is moved to press the 1st transfer rollers up against the transfer belt which blocks the 1st image transfer retraction position sensor 3 After the lapse of a predetermined period of time after the 1st image transfer retrac tion position sensor has been blocked the 1st image transfer pressure retraction clutch is de energized magicolor 4690MF B Retraction position control The pressure and retraction operation of the 1st transfer roller is controlled as the 1st image transfer retraction position sensor detects the movement of the sliding plate 1 The 1st image transfer pressure retraction clutch is energized 2 The sliding plate is moved to retract the 1st transfer rollers from the transfer belt As a result the 1st image transfer retraction position sensor which has been blocked is now unblocked 3 After the lapse of a predetermined period of time after the 1st image transfer retrac tion position sensor has been unblocked the 1st image transfer pressure retraction clutch is de energized 1st image transfer retraction position sensor PS9 Sliding plate Rs Q 7 fe 55 iS 4138t02046c1
38. preventive mechanism works in the way that the front door cannot be closed by interfering with the release lever until the release lever is placed in the locked position to the left in the pic ture magicolor 4690MF Rs 7 Q 7 fe iS Release lever AO11T2CO10DA A011T2C011DA 22 Theory of operation Ver 1 0 May 2008 9 Toner supply section 9 3 3 Toner replenishing mechanism The toner supply motor is energized according to the condition of the toner level sensor for each color of toner Toner is then supplied from the toner cartridge to the print unit as necessary Asingle toner supply motor is turned either forward or backward to accomplish supply of toner of two different colors one motor is for Y and M and the other for C and K That is M K toner cannot be supplied while Y C toner is being supplied Toner is supplied only while the print unit is being driven This is because of the following reason if toner is supplied from the toner cartridge while the print unit remains station ary toner stagnates at the print unit Direction of rotation Toner supply Agitating blade conveyance screw Toner supply motor as viewed from above of motor shaft M c K M M6 Forward clockwise Turned Stationary Stationary Stationary Backward cou
39. the fusing section To prevent poor fusing performance the fusing speed is changed in two steps according to the media type Plain paper mm s Thick paper envelops gloss paper OHP mm s Fusing speed 144 72 B Fusing speed control control of loop before fusing To prevent double transferred images and brush effects from occurring the difference between the fusing speed and the media conveyance speed during image transfer is cor rected The media loop sensor detects the length of the loop formed in the media between the 2nd transfer roller and the fusing pressure roller The fusing speed is then varied accord ing to the length of the loop detected By varying the fusing speed media is prevented from being misfed or contacting the charge neutralizing cloth No loop control is provided to perform the fusing process when envelopes are used to prevent wrinkles 80 Theory of operation Ver 1 0 May 2008 21 Fusing section 1 Fusing deceleration low speed When the media loop length is small the actuator of the media loop sensor is pushed up a small amount and the sensor is unblocked When the sensor is unblocked the fusing Speed is decelerated 2 Fusing acceleration high speed When the media loop length is large the actuator of the media loop sensor is pushed up a large amount and the sensor is blocked When the sensor is blocked the fusing speed is accelerated Fusing deceleratio
40. the panel at this time The body accepts no print job after the waste toner full condition has been E detected 8 The waste toner full warning indication disappears when a new waste toner bottle is 8 installed 60 Theory of operation Ver 1 0 May 2008 17 Media feed section Tray 1 17 Media feed section Tray 1 17 1 Composition magicolor 4690MF AOFDT2C529AA Feed roller E a du Q Media lift plate e 5 E Q E e Separation roller A011T2C553AA Transport motor M3 Tray1 media feed clutch M2 Tray1 media empty sensor A011T2C554AA Separation roller 61 magicolor 4690MF RS 7 Q 7 fe fet iS 17 Media feed section Tray 1 Theory of operation Ver 1 0 May 2008 17 2 Drive Tray1 media feed clutch CL2 Feed roller m os Q CRC EG Transport motor M3 A011T2C557AA 17 3 Operation 17 3 1 Media lift plate mechanism The media lift plate will be locked under the media lift plate lock lever by pressing it down in which the media is loaded in position The media lift plate lock lever will be pressed to the feed roller The media feed clutch will rotate the feed roller to activate the lock release lever pressed to the feed roller and the media lift plate will be unlocked The media lift plate m
41. the roller rotates backward A DUP normal reverse rotation clutch motion OPEN mode Media exit roller Normal rotation clutch of the Switchback roller Transportation Switchback roller rotating Normal rotation Reverse rotation Switchback guide route direction clutch clutch mode A Stopping OFF OFF CLOSE B Normal rotation ON OFF OPEN C Reverse rotation OFF ON CLOSE Reverse rotation clutch of the Switchback roller 5 TI Z s amp Normal Reverse 9 rotation rotation B Switchback CLOSE roller mode AOFDT2E528AA 1 Single side printing Media exits outside the machine with the switchback gate in CLOSE mode The switchback roller mode is stopping Q Switchback roller CLOSE mode Media exit roller gt A011T2C536AA 90 Theory of operation Ver 1 0 May 2008 22 Duplex section 2 Duplex printing 1 The switchback guide turns to the OPEN mode and the media is transported to the direction of the switchback roller 2 The switchback roller rotates forward magicolor 4690MF TN O Switchback roller Media exit roller OPEN mode A011T2C537AA 3 The switchback guide becomes CLOSE mode after the back end of the media passes through the media exit roller and the switchback roller starts rotating back ward to send the media to the duplex unit direction rm S 7 9
42. 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 Thermistors are used to detect the surface temperature of the Fusing roller The heater lamps are then turned ON and OFF as necessary to achieve the set temperature The control temperature in the print command wait state is called the standby tempera ture while that for permanently fix the toner image on media into the media is called the print temperature magicolor 4690MF Temperature control for plain paper A4 full color print ordinary start Warm up control Wait control Wait control Printing temperature Warm up complete 2 E 8 Q tem t 9 perature gt Q E fe Warm up cycle completed A011T2C544AA 21 3 3 Warm up control Control is provided until the Fusing roller reaches the predetermined level A Control start timing The power switch is turned ON A malfunction or media misfeed is reset The main body leaves the power save mode A door is closed B Control termination timing The Fusing roller reaches a predetermined temperature A malfunction or media misfeed is reset A door is opened 83 21 Fusing section Theory of operation Ver 1 0 May 2008 C Control start decision Either of the following two control start d
43. turning them OFF 85 magicolor 4690MF 0 7 Q 9 7 E 9 22 Duplex section Theory of operation Ver 1 0 May 2008 22 Duplex section 22 4 Composition magicolor 4690MF AA AOFDT2C518AA A011T2C534AA Switchback sensor PS30 witchback roller feed clutch Rs 7 Q 7 fe iS Switchback roller revers clutch AOFDT2C519AA 86 Theory of operation Ver 1 0 May 2008 22 Duplex section 22 2 Drive magicolor 4690MF A011T2C540AA 0 7 Q 9 7 9 87 magicolor 4690MF 0 7 Q 7 fe fet iS 22 Duplex section Theory of operation Ver 1 0 May 2008 22 3 Operation 22 3 1 Outline Asthe duplex system doesn t have its dedicated motor and board the media exit roller switchback roller Duplex transport roller are driven by the fusing motor Media is trans ported to exist out direction or to switchover roller direction controlled with the switchback guide This model is provided with the switchback roller and its route control system which enables the machine to achieve 100 productivity of duplex print of A4 LTR The media transported from the fusing unit is temporarily stored in the horizontal
44. until the release lever is placed in the locked position to the left in the pic LL o 2 gt o G ture Closed 5 Shutter E Q Opened e 2 e a e Release lever A011T2CO10DA A011T2C021DA 35 magicolor 4690MF 0 Q 7 fe iS 13 Print unit section developing Theory of operation Ver 1 0 May 2008 13 2 3 1 2 Toner flow Toner stored in the toner cartridge is agitated by the agitating blade and conveyed onto the front side of the toner cartridge by the conveyance screw Toner conveyed onto the front side of the toner cartridge is conveyed through the toner collecting port and then conveyed to the print unit collecting port The toner conveyed to the collecting port is conveyed into the toner chamber by the replenishing screw The toner level detection system provided on the front side of the developing unit the sensor is mounted on the main body side detects at this time the level of toner still available for use in the toner chamber The toner conveyed to the toner chamber is agitated charged by the replenishing screw and agitating screw Toner conveyed onto the rear side of the toner chamber is fed to the supply roller Toner fed to the supply roller is conveyed onto the developing roller At this time the regula
45. 1 Sided Mode 2 Sided Mode C Paper 1 Sided mode 50 g m to 128 g m 2 Sided mode 50 g m to 128 g m ABS 55 45 LegalS 8 5 14 LetterS 8 5 x 11 Invoice 8 5 x 5 5 Type of document Detectable document size Width 140 to 216 mm Length 148 to 355 6 mm Capacity 50 sheets 80 g m or load height of 8 mm or less D Maintenance E Paper feed prohibited originals The following types of originals should not be used Types of document Possible malfunctions Feed failure damage to the original or drive Original that is stapled or clipped failure due to clip clogging Pasted originals Misfeed broken original or folded paste up edges Feed failure damage to the original or drive Book original failure Tm ERF gt Original weighing less than 35 g m or Feed failure 210 g m or more Torn original Feed failure damaged sheet Highly curled original 15 mm or more Original misfeed due to dog ear or skew OHP transparencies Feed failure Label Sheet Feed failure Photographic paper gloss enamel paper or other gloss Feed failure damage to the original or drive original failure Offset master Feed failure Sheets clipped or notched Damaged sheet Less than 0 05 mm thick thin paper Misfeed More than 0 15 mm thick thin paper Misfeed e 5 o o a o IB lt Feeder Unit 1 Product Specifications F Pa
46. 23 W x 23 23 D x 22 75 H inch 50 0 kg 110 3 Ib or less without consumables 55 0 kg 121 3 Ib or less with consumables During standby 39 dB A or less During printing 53 5 dB A or less During copying 54 5 dB A or less with ADF Power requirements Max power consumption Dimensions Weight Operating noise F Operating environment Temperature 10 C to 35 50 F to 95 F with a fluctuation of 10 18 F or less per hour Humidity 15 to 85 with a fluctuation of 20 or less per hour LL z o 9 9 o G G Print functions 2 Product specifications Theory of operation Ver 1 0 May 2008 Type Built in type controller Personal computer Pentium II 400 MHz or higher Power Mac G3 or later G4 or later is recommended Intel processor System Requirements Operating system Microsoft Windows Vista Home Basic Home Premium Ulti mate Business Enterprise Windows Vista Home Basic Home Premium Ultimate Business Enterprise x64 Edition Windows XP Home Edition Professional Service Pack 1 or later Service Pack 2 or later is recommended Windows XP Professional x64 Edition Windows Server 2003 Windows Server 2003 x64 Edition Windows 2000 Service Pack 4 or later Mac OS X 10 2 8 or later We recommend installing the new est patch Free hard disk space 256 MB or more RAM 128 MB or more
47. 2C043DA A011T2C044DA 57 magicolor 4690MF 0 7 Q 7 fe fet fo iS 16 Waste toner collecting section 16 3 5 Waste toner box locking mechanism Theory of operation Ver 1 0 May 2008 When the box lock lever is in the locked position the 12 o clock position the protrusion provided at the toner collecting port interferes with the main body frame thus preventing the waste toner box from being removed When the box lock lever is in the unlocked position the 9 o clock position the waste toner box can be removed Box lock lever Locked Collecting port Protrusion A011T2C045DA 16 3 6 When the box lock lever is in the unlocked position the 9 o clock position the protrusion provided in the front door interferes with the box lock lever As a result the front door cannot be closed When the box lock lever is in the locked position the 12 o clock position the front door can be closed Waste toner box locked position detection mechanism Unlock Lock Or I
48. 7 Medi feed section Tray 1 ine rerit ceti ines 61 17 1 Composition Uu R EM IIa m dn 17 3 4 Media lift plate mechanism reranrnnnvrnnnvnnnvennvvnnrvrnnnrnnrvrnnvvennnrnnnvrnrsrensvesrnen 62 17 3 2 Media separation mechanism sreasvrnnnvrnvnvnrnvrnnrvenrnrennvenrnrensvenrrenvernrreren 63 17 3 3 feed control uernassnnnonnonannasnrnnnnnnnnennvnnennnnennansnnnennnnernassrnnennnnnennsnnsens 63 17 3 4 Media empty condition detection control esse 64 18 Media feed section Tray 2 rrrnnvnonrnnvnnnrnnrnnnrnnrnrnnrnrarnnnnrenrnrnnrnrernnsneervernesnrnennenene 65 18 1 GOmDpOSIOn rii ei eri rend CE EHE Eee et enti e Eee eL ee E 65 Lu 66 lii magicolor 4690MF S 7 9 7 E 9 magicolor 4690MF 0 7 Q 7 fe 2 iS Theory of operation Ver 1 0 May 2008 18 3 e 66 18 3 1 Media lift plate mechanism eeseeeeeeseeeeneeneneennne 66 18 3 2 Media separation mechanism essen 67 18 3 3 Media feed control reete tae enne netta theo tha etna oen ha 67 18 3 4 Media supply level detection 68 18 3
49. AA Auto Document Feeder Unit 7 Q 9 n E 9 4 Mechanical operations Theory of operation Ver 1 0 May 2008 4 2 2 Document exit mechanism The exit roller turns to feed the original out of the document feeder and onto the docu ment exit tray The transport motor turns the exit roller through a gear train Auto Document Feeder Unit Transport motor M1 0 7 Q 7 fe fet iS Exit roller Exit roll AOFDT2C606AA Theory of operation Ver 1 0 May 2008 4 Mechanical operations 4 2 3 Switching mechanism for turnover paper exit The original transferred from the transport section will switch back or exit by the exit roller and the exit switch back roller The exit switch back roller is driven by the exit motor During the turnover operation the exit rolls are pressed against or retracted from the exit roller to prevent the leading and trailing edges of the original from being pinched between the roller and rolls Pressure and retraction operations are performed by energizing or deenergizing the retraction solenoid When the retraction solenoid is energized the arm is operated to move the exit rolls away from the exit roller Arm Retraction solenoid Exit roller AOFDT2C607AA When the retraction solenoid is deenergized When the retraction solenoid is
50. Toner collecting port 1st transfer roller C 1st transfer roller M 1st transfer roller K Pressure cam 4138102035 2 A011T2C032DA 39 magicolor 4690MF hy 7 Q 9 7 e 9 14 Transfer section 1st transfer Theory of operation Ver 1 0 May 2008 14 2 Drive 1st image transfer pressure retraction 4 clutch CLA magicolor 4690MF Transport motor M3 4138t02038c0 Mechanism for driving the belt 1stimage transfer pressure retraction clutch CL4 Transfer belt drive roller Transport motor M3 Transfer belt 0 7 Q 7 fe fet iS Driven roller 4138102041 1 Mechanism for driving the pressure retraction motion Pressure cam 1st transfer roller Y M C K Sliding plate Toner collecting screw A011T2C033DA 40 Theory of operation Ver 1 0 May 2008 14 Transfer section 1st transfer 14 3 Operation 14 3 1 1st transfer output control Totransfer the toner image from the photo conductor to the transfer belt the transfer volt age is applied to the 1st transfer roller A charge of the same potential is applied to each of the 1st transfer rollers The transfer voltage is applied after the 1st transfer roller Y M C is pressed against the transfer belt for color mode The transfer output is turned OFF after the las
51. a feed control rer 4 4 1 1 Media lift plate mechanism essere 4 4 1 2 Feed roller vertical transport roller control eee 5 4 1 3 Media separation mechanism 6 4 1 4 Media detection mechanism 6 4 1 5 Media supply level detection control essen 7 4 1 6 Media empty condition detection control 7 4 1 7 Edge g ide plate rnnt rtt trennt 8 4 1 8 Trailing edge guide plate eese nnne 8 4 1 9 Media size detection control sess 9 4 1 10 Media reference position adjustment 10 4 1 11 Media misfeed detection control esseeseeeeeeennen 10 Lower feeder unit RS 7 Q 9 7 9 Theory of operation Ver 1 0 May 2008 jun JEpaaj J90 uoneJedo uonisoduo Blank Page Theory of operation Ve 1 Product specifications Outline 1 Products A Type r 1 0 May 2008 pecifications Name Add on 500 sheet media feed cassette Type Front loading type Installation Desk type Media feeding system Media separation by a small diameter roller with torque limiter Document alignment Center
52. ade 1st to negatively charge the toner and form a thin layer of toner 3 Toner on the surface of the developing roller is evened out by the regulator blade 2nd 4 During development DC AC developing bias voltage Vb is applied to develop ing roller The AC component of the developing bias voltage is applied only during development At any time other than the development only the DC component of the developing bias voltage is applied 5 Toner sticks to the photo conductor when the AC component of the developing bias voltage Vpp is negative The voltage and time length of the negative component Vpp determines the image density 6 Anegative charge charge neutralizing bias voltage same potential as the develop magicolor 4690MF ing bias is applied to the charge neutralizing sheet to neutralize any toner left on 5 the surface of the developing roller The neutralized toner is returned to the supply roller Q 5 Charge neutralizing sheet d i Photo conductor 5 Supply roller 5 Developing roller Regulator blade 1s Regulator blade 2nd A011T2C024DB Charge neutralizing sheet Developing roller bias Charge corona Supply roller bias Regulator blade bias Grid mesh A011T2C025DA 37 13 Print unit section developing Theory of operation Ver 1 0 May 2008 13 2 5 Cleaning mechanism A Cleaning operation 1 The cleaning blade is pressed a
53. an invisible laser beam The laser diode and the scanning polygon mirror are incorporated in the print head unit The print head unit is NOT A FIELD SERVICEABLE ITEM Therefore the print head unit should not be opened under any circumstances Laser Aperture of the Print Head Unit AOFDPOC502DA 5 13 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 Food and Drug Administration of the U S Department of Health and Human Services DHHS This means that the device does not produce hazardous laser radiation The label shown on page S 16 indicates compliance with the CDRH regulations and must be attached to laser products marketed in the United States CAUTION Use of controls adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure semiconductor laser Maximum power of the laser diode 15 mw Wavelength 770 800 nm All Areas CAUTION Use of controls adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure
54. antity equivalent to 4 000 printed 40 Approx 1 600 sheets Quantity equivalent to 8 000 printed Approx 3 200 sheets for a standard original of a 5 coverage rate A toner near empty condition is reset when a new toner cartridge is detected S Q e 7 fe 24 Theory of operation Ver 1 0 May 2008 9 Toner supply section 9 3 6 Toner empty condition detection A Toner empty condition detection mechanism The print unit has a toner empty condition detecting mechanism Based on the amount of toner conveyed from the toner cartridge to the print unit a toner empty condition is detected Atoner level in the print unit is detected by the LED and toner level sensor mounted on the toner level sensor board provided in the main body Light emitted from the LED travels through the light guiding path and is guided into the print unit The toner level sensor detects the intensity of the transmitted light guided through the light guiding path from the inside of the toner cartridge The toner level is thereby esti mated To ensure correct detection of the intensity of transmitted light by the toner level sensor a cleaning sheet is provided that cleans the window in the light guiding path periodically magicolor 4690MF LED Sensor U U U Cleaning sheet Light guiding path 9
55. atures The fusing roller temperature is set according to the type of media main body interior temperature as measured by the temperature humidity sensor and warm up start deci sion For types of media other than plain paper the fusing speed is controlled at the 1 2 speed 84 Theory of operation Ver 1 0 May 2008 21 Fusing section D Print control temperature adjustments The temperature during print control is adjusted using the menu available from the con trol panel The temperature can however be decreased only e Adjustment steps are 0 C 5 C and 10 21 3 6 PPM control The PPM control is performed to prevent the fusing pressure roller and the fusing belt temperatures from going down during a multi print cycle as well as to prevent the tem peratures of the roller and belt edges from going up e f a multi print cycle is run using media of a small size a difference is produced in tem perature between the center portion of the roller belt the surface over which the media moves past and the edges of the roller belt where no part of the media moves past To inhibit this situation the distance between sheets of media is widened and the tem perature of the fusing roller is thereby made uniform 21 3 7 Protection against abnormally high temperature The main body provides protection at three different stages to prevent abnormally high temperature of the fusing unit 1 Soft protection 2 Hard protection
56. ay 2008 18 Media feed section Tray 2 18 3 6 Tray open close detection control Whether tray is opened or closed is detected with the tray 2 set switch 1 Closing the tray will make the detecting plate press and turn ON the tray 2 set switch mounted on the main body frame 2 The switch will be OFF if the tray is pulled out and PAPER EMPTY TRAY 2 will appear Tray2 set switch S5 Co WN 0 rt m Tray detection plate A011T2C564AA A011T2C565AA 18 3 7 Media misfeed detection control f the registration sensor is not activated within a predetermined period of time after media feed sequence has been started the main body determines that there is a media misfeed It then gives the message PAPER EMPTY TRAY 2 on the panel The media misfeed display can be reset by opening and closing any of the doors 69 magicolor 4690MF g 7 Q 9 7 E 9 19 Conveyance section IDC sensor Theory of operation Ver 1 0 May 2008 19 Conveyance section IDC sensor 19 1 Composition magicolor 4690MF 4138102060 0 IDC sensor IDC sensor Re IDCSB R Rs Q o lt 7 fe 9 A011T2C569AA 70 Theory of operation Ver 1 0 M
57. ay 2008 19 Conveyance section IDC sensor 19 1 1 Drive magicolor 4690MF A011T2C582AA 19 2 Operation 19 2 1 Toner density detection control Areflective sensor is used for the IDC sensor that detects the amount of toner sticking to the surface of the transfer belt Image stabilization is performed based on the value detected The detection pattern toner image produced on the surface of the transfer belt is irradi ated with light emitted by the LED of the sensor The photodiode of the sensor detects the light reflected off the toner pattern on the sur face of the transfer belt 3 7 Q 9 7 E 9 Photodiode Transfer belt surface LED IDC sensor 4138t02085c0 4138t02084c0 A voltage corresponding to the intensity of the light reflected off the toner pattern is out put to the MFP board Amount of toner Intensity of light sticking reflected Output Large Small Low Small Great High 71 magicolor 4690MF 0 7 Q 7 fe fet iS 19 Conveyance section IDC sensor Theory of operation Ver 1 0 May 2008 19 2 2 IDC sensor calibration control Changes in various types of characteristics due to change with time of the IDC sensor deteriorated LED dirty sensor surface part to part variations in the sensor
58. ay 2008 23 Horizontal conveyance section 23 3 Operation 23 3 1 Transport control The horizontal conveyance section consists of the transport section which transports media fed from the fusing unit to the exit tray and the switchback section which trans ports the media to the duplex section magicolor 4690MF Switchback section Transport section AOFDT2C507AA A Transport section The transport rollers transport media fed from the fusing unit to the exit tray Each of the transport rollers is driven by the corresponding drive belt via a gear train through the drive provided by the fusing motor Each transport roller is brought to a stop a predetermined period of time after the media has fed into the exit tray g 7 Q 9 n E 9 B Switchback section The switchback section transports the media fed from the fusing unit onto the switchback section and to the duplex section The switchback section provides the drive for transport of the media to the duplex sec tion For the control of media transport to the duplex section see Switchback Duplex Section 95 23 Horizontal conveyance section Theory of operation Ver 1 0 May 2008 23 3 2 Opening and closing the horizontal conveyance section The horizontal conveyance section can be opened when the upper door is raised The switchback section can be opened by
59. butor who has been notified first must immediately take emergency measures to provide relief to affected persons and to prevent further damage 2 Ifareport of a serious accident has been received from a customer an on site evalua tion must be carried out quickly and KMBT must be notified 3 To determine the cause of the accident conditions and materials must be recorded through direct on site checks in accordance with instructions issued by KMBT 4 Forreports and measures concerning serious accidents follow the regulations speci fied by every distributor S 22 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 Field Service section gives as information required by the CE at the site or at the cus tomer s premise a rough outline of the service schedule and its details maintenance steps the object and role of each adjustment error codes and supplementary information The basic configuration of each section is as follows However some options may not be applied to the following configuration Theory of Operation section
60. cartridge life control 25 10 Print unit section overall composition 26 10 1 Composition tico dert ipit eost eco picti 26 10 2 Operation cider Erie erit ice eS ie re UE Fe aS 27 10 2 1 Print unit life detection 5 27 10 2 2 Print unit life Control rer nr rnnt tne nini 27 11 Print unit section photo conductor 28 MC uci 28 T4122 Diver ae ORA EE CRETA EE YEAR da 28 11 3 OPO Pati ON 29 11 3 1 Photo conductor drive mechanism essen 29 11 3 2 Photo conductor post exposure control sese 30 11 3 3 Photo conductor total exposure control upon 30 11 3 4 Photo conductor small amount rotation control 30 12 Print unit section charge corona 31 12 1 Composition 12 2 Operation nennen enne ennemi 12 2 1 Charge corona unit ON OFF control essen 32 12 2 Ozone ventilation mechanism sese 32 13 Print unit section 33 13 1 uoi 33 13 2 Operation ei dee Ete eie e cie n OE ESAE 34 13 2 1 Developing drive 34 13 2 2 Toner collecting port shutter mechanism
61. controller i Ceo een e ae pe ERE CEDE Ee VE REA ES 95 23 3 2 Opening and closing the horizontal conveyance section 96 24 Media exit SOCOM icc citet ett nen net th tete e EL HE Fa ra Eae eR AIR Lee Ea 97 24 4 QGCombpositioD cie accideret e red iced eti dese c de Eo ead 97 p 98 24 3 Operation un 98 24 3 1 Media exit control reet terrere rrr tinet nibh 98 24 3 2 Media full detection retentis 99 25 Image stabilization control nennen 100 25 1 Overview of image stabilization control een 100 25 1 1 Complete correction control senem 100 25 1 2 Simplified correction control 101 25 1 3 Individual registration 101 25 1 4 Image stabilization control execution 102 26 Miscellaneous suninman annerri 103 26 1 oiii eere en E canccesacesanceysieseecasepcaaecdusiheus caseensstscanedbatnasservatiseseess 103 26 1 uerit tere rti tan RI 103 26 1 2 Function 26 1 3 Control magicolor 4690MF S 7 Q 9 n E 9 Theory of operation Ver 1 0 May 2008 magicolor 4690MF 0 Q 7 fe 2 iS Blan
62. e During the light door open During the warm up cycle A print cycle is being carried out using transparency Half speed rotation conditions A malfunction occurs but not when an error occurs E Defogger fan motor Full speed rotation conditions Forthe period of time that begins when the warm up cycle is started and ends when a predetermined period of time elapses after the warm up cycle has been completed Forthe period of time that begins when a print cycle starts and ends when a predeter mined period of time elapses after the print cycle has been completed Stop conditions During the power save mode A predetermined period of time elapses after a warm up cycle is completed A predetermined period of time elapses after a print cycle has been completed Half speed rotation conditions A predetermined period of time after a warm up cycle is completed A predetermined period of time after a print cycle has been completed 105 26 Miscellaneous Theory of operation Ver 1 0 May 2008 magicolor 4690MF Rs N fe a iS Blank Page 106 KONICA MINOLTA SERVICE MANUAL Auto Document Feeder Unit 2008 05 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 Revision history After publication of this service manual the parts and mechanism may be subject to change for improvement of their performance The
63. e duct inside the toner car tridge rail and below the print head housing No air flows through areas around the toner cartridges This effectively prevents toner from scattering C Ozone fan motor Discharges heat generated from the print head from the main body to prevent the print head temperature from becoming inordinately high Removes ozone produced from the toner cartridges and charging section Air passageway is formed on top of the DC power supply in the duct inside the toner car tridge rail and below the print head housing No air flows through areas around the toner cartridges This effectively prevents toner from scattering D Duplex cooling fan motor To avoid temperature increase at the fusing section heat stagnating in the fusing section will be discharged out of the machine E Defogger fan motor Heat accumulated inside the scanner section will be discharged in order to avoid temper ature increase at the scanner section To prevent condensation from forming in the horizontal conveyance section 103 26 Miscellaneous Theory of operation Ver 1 0 May 2008 26 1 3 Control A DC power supply fan motor control Full speed rotation conditions Forthe period of time that begins when the warm up cycle is started and ends when a predetermined period of time elapses after the warm up cycle has been completed Forthe period of time that begins when a print cycle starts and ends when a predeter mined per
64. e the product near flammable materials or vola tile materials that may catch fire Q A risk of fire exists UR Do not place the product in a place exposed to water such as rain Q X A risk of fire and electric shock exists When not Using the Product for a long time NWARNING When the product is not used over an extended period of time holidays etc switch it off and unplug the power gt cord Dust collected around the power plug and outlet may cause fire S 6 SAFETY AND IMPORTANT WARNING ITEMS Ventilation NCAUTION The product generates ozone gas during operation but it will not be harmful to the human body If a bad smell of ozone is present in the following cases ventilate the room a When the product is used in a poorly ventilated room b When taking a lot of copies c When using multiple products at the same time Stability NCAUTION Be sure to lock the caster stoppers In the case of an earthquake and so on the product may slide leading to a injury Inspection before Servicing NCAUTION 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 B Do not make any adjustment not described in the docu Q mentation If the pre
65. e types complete correction control 25 1 1 simplified correction control and individual registration control The following explain specific details of each type of control Complete correction control Controls 1 through 6 below are collectively called the complete correction control For details of each of these controls see the relevant page Control name Purpose 1 IDC sensor offset value To check the low gain output value and offset voltage value of the IDC check sensor when the shutter is closed Changes in various types of characteristics due to change with time of the IDC sensor deteriorated LED dirty sensor surface part to part 2 IDC sensor calibration variations in the sensors and change of environment affect the IDC Sen control Sor output corresponding to the clear transfer belt surface To correct fluctuations in the output the sensor LED intensity is adjusted so as to keep constant the IDC sensor output value If the developing bias voltage Vpp is too high for the Ds distance in each toner cartridge a leak image background leak image area leak Developing bias Vpp me 3 control results If Vpp is excessively low halftone reproducibility becomes poor This control detects a Vpp range in which no image failure occurs to set the optimum Vpp Developing bias control 4 control of the maximum To correct the target amount of toner sticking to the transfer belt to fo
66. e waste toner transport unit 3 The toner conveyed is carried to the suction transport unit by the transport roller provided in the waste toner transport unit 4 The conveyed toner is carried to the toner collecting port of the waste toner box by the conveyance screw provided in the suction transport unit 5 The toner conveyed is stored into in the waste toner box by the conveyance screw provided in the waste toner box magicolor 4690MF Waste toner collecting screw Toner collecting Screw Waste toner transport unit Print unit 2nd conveyance screw Waste toner bottle Q 9 7 9 Waste toner collecting screw Suction transport unit A011T2C561AA 55 magicolor 4690MF 0 7 Q 7 fe fet iS 16 Waste toner collecting section 16 3 2 1 2 Theory of operation Ver 1 0 May 2008 Toner flow at the 2nd transfer section Toner scraped off by the cleaning blade provided in the transfer belt unit is collected onto the middle of the transfer belt unit by the toner collecting screw The toner collected is conveyed to the suction transport unit through the toner col lecting port that is provided in the middle of the transfer belt unit The conveyed toner is carried to the toner collecting port of the waste toner box by the conveyance screw provided in the suction t
67. ecisions is made according to the temperature detected by the temperature humidity sensor TEM HUMS The fusing temperature dur ing the print cycle varies depending on the type of start control whether low temperature start control or ordinary start control If the information provided by the temperature humidity sensor is less than a predeter mined value e If the information provided by the temperature humidity sensor is equal to or more than the predetermined value e If the information provided by the temperature humidity sensor is the predetermined value or more the ordinary start control is provided magicolor 4690MF 21 3 4 Wait control Control is provided to ensure that the temperatures at different parts of the fusing unit reach a constant level during the wait state A Control start timing Atthe end of the warm up control Atthe end of the post print cycle control print start control B Control termination timing The front cover is opened and closed A malfunction or media misfeed occurs 0 7 Q 7 fe Q 21 3 5 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 A print request is received B Control termination timing A malfunction or media misfeed occurs C Print control temper
68. edia stack is pressed against the feed roller The media lift plate media stack is pressed upward by the springs at all times Feed roller LOCK POSITION Media lift plate Spring Media lift plate lock lever LOCK RELEASE POSITION 4138t02617c0 62 Theory of operation Ver 1 0 May 2008 17 Media feed section Tray 1 17 3 2 Media separation mechanism Drive from the Transport motor is transmitted through the Tray1 media feed clutch to turn the feed roller The feed roller rotates to take up and feed media into the main body Double feeding of media is prevented by the separation roller provided with a torque lim iter magicolor 4690MF Feed roller Separation roller 4138t02618c0 17 3 3 Media feed control Drive from the transport motor is transmitted through the tray1 media feed clutch to turn the feed roller thereby taking up and feeding the media The media taken up and fed in is conveyed onto the registration roller The media is pressed against the stationary registration roller so that a loop is formed in the media The feed roller is then stopped The loop thus formed in the media corrects any mechanical skew in the media 5 Q e 7 fe 9 63 17 Media feed section Tray 1 Theory of operation Ver 1 0 May 2008 17 3 4 Media empty condition detection control A media empty condition
69. ediately before the feed roller the feed roller is stopped g 7 Q 9 7 E 9 67 magicolor 4690MF 0 Q 7 fe fet iS 18 Media feed section Tray 2 18 3 4 Media supply level detection control Theory of operation Ver 1 0 May 2008 There is a window in the front cover of the cassette for indicating the media supply level When the media lift plate goes up a red lever appears in the window The lower the level of the media stack the more the red portion is visible Lever Pa Lever indicator indicating the media supply level 4138t02091c0 A011T2C563AA ay w A media empty condition When media is loaded 18 3 5 Media empty condition detection control The media empty message PAPER EMPTY TRAY is displayed on the panel when the empty sensor actuator unblocks the media empty sensor No mechanism is provided for detecting a media near empty condition The media sup ply level indicator replaces this function When media is loaded Tray2 media empty sensor PS1 Empty sensor actuator 4138t02092c0 A media empty condition Media lift plate x 4138t02124c0 68 Theory of operation Ver 1 0 M
70. eg ulating the drawing positions The registration correction control automatically detects and corrects this incorrect color registration It is controlled integrally with other control items by the image stabilization control The registration correction control is performed when there is a request made for execu tion of image stabilization sequence Theory of operation Ver 1 0 May 2008 9 Toner supply section 9 Toner supply section 9 1 Composition magicolor 4690MF Agitating blade A011T2C525AA A011T2C007DA Conveyance screw TC detection board CSIC 7 Q 9 7 E 9 A011T2C006DA Conveyance screw Toner collecting port 19 magicolor 4690MF 0 7 7 fe fet iS 9 Toner supply section 9 2 Drive Theory of operation Ver 1 0 May 2008 Front view 3D view Toner MC motor Y M M6 Toner supply motor Y M M6 Conveyance screw Toner supply motor C K M7 4138t02599c0 Toner supply motor C K M7 A011T2C008DA 20 Theory of operation Ver 1 0 May 2008 9 Toner supply section 9 3 Operation 9 3 1 Toner conveying mechanism The toner supply motor is turned either forward or backward to drive the agitating blade and the conveya
71. en pitch and eccentricity Drive is transmitted to each of the photo conductors when the coupling on the drive end is engaged with that on the driven end Transport motor M3 Large diameter gear Coupling 4138102027 0 Y 29 magicolor 4690MF 55 Q e 7 fe 9 11 Print unit section photo conductor Theory of operation Ver 1 0 May 2008 11 3 2 Photo conductor post exposure control The entire surface of the photo conductor is exposed to light before the photo conductor stops rotating during the stop sequence or color change sequence from the color print to monochrome print after a print cycle Ozone stagnant in areas near the charge corona unit is adsorbed on the surface of the photo conductor This reduces sensitivity of the photo conductor causing white bands to occur in the image To prevent this image failure from occurring the entire surface of the photo conductor is exposed to light and thus neutralized This effectively prevents the surface of the photo conductor from absorbing ozone magicolor 4690MF 11 3 3 Photo conductor total exposure control upon recovery f the Photo conductor post exposure control described above is not correctly done the entire surface of the photo conductor is exposed to light thereby preventing ozone from being adsorbed on the surface of the photo conductor f the Photo conductor
72. enne bruksanvisn ing kan brukeren utsettes f r unsynlig laserstr lning som overskrider grensen for laser klass 1 halvleder laser Maksimal effekt till laserdiode 15 mW b lgelengde 770 800 nm S 15 SAFETY AND IMPORTANT WARNING ITEMS 5 2 Laser Safety Label A laser safety label is attached to the inside of the machine as shown below COMPLIES WITH 21 CFR 1040 10 AND 1040 11 EXCEPT FOR DEVIATIONS PURSUANT TO LASER NOTICE NO 50 DATED JULY 26 2001 or and CLASS 1 LASER PRODUCT LASER KLASSE 1 PRODUKT PRODUCTO LASER DE CLASE 1 max USE NE AOFDPOESOODA S 16 5 3 Laser Caution Label SAFETY AND IMPORTANT WARNING ITEMS laser caution label is attached to the outside of the machine as shown below CRMC LOS ARRAY VENTET E LEBIREU MARU LAUT CES EE CAUTION CLASS 3B INVISIBLE LASER RADIATION WHEN OPEN AVOID EXPOSURE TO 3B UNSICHTBARE LASERSTRAHLUNG WENN ECKUNG GEOFFNET NICHT DEM STRAHL AUSSETZEN ADVARSEL KLASSE 3B USYNLIG LASERSTR LING N R DEKSEL PNES UNNG EKSPONERING FOR STR LEN VARO AVATTAESSA OLET ALTTIINA LUOKAN 38 NAKYMATTOMALLE LASERSATEILYLLE ALA KATSO S TEESEEN ADVARSEL USYNLIG KLASSE 3B LASERSTRALING VED ABNING UNDG UDS TTELSE FOR STR LING VARNING OSYNLIG LASERSTR LNING KLASS N R DENNA DEL AV OPPNAD STR LEN AR FARLIG iE FFARR RACES MRS RES TIBIAE RAIMA AN BS SOA Gr B AHHA
73. eory of operation Ver 1 0 May 2008 3 Drive 2 502 4 Operations 4 1 Media feed control 4 1 1 Media lift plate mechanism The media lift plate is pressed down into the locked position in which the media is loaded in position Load a media stack and then slide the tray into the main body This unlocks the media lift plate The media lift plate media stack is pressed against the feed roller The media lift plate media stack is pressed upward by the springs at all times Media lift plate Feed roller 4138t02605c0 Theory of operation Ver 1 0 May 2008 4 Operations 4 1 2 Feed roller vertical transport roller control The feed roller and vertical transport roller are rotated which feeds media from the lower feeder unit and conveys it further into the inside of the main body 1 The transport motor is energized to turn the vertical transport roller 2 The media feed clutch is energized to turn the feed roller 3 The media is fed in by the feed roller 4 The media fed in by the feed roller is conveyed onto the synchronizing roller of the main body by the vertical transport roller 5 When the media feed sensor is activated and then the media is conveyed onto a predetermined point in the media path the media feed clutch is de energized thus bringing the feed roller to a stop The vertical transport roller thereafter takes charge of conveying media further 6 When the tra
74. er of times the revision has been made NOTE Revision marks shown in a page are restricted only to the latest ones with the old ones deleted When a page revised in Ver 2 0 has been changed in Ver 3 0 The revision marks for Ver 3 0 only are shown with those for Ver 2 0 deleted When a page revised in Ver 2 0 has not been changed in Ver 3 0 The revision marks for Ver 2 0 are left as they are 2008 05 1 0 Issue of the first edition Date Service manual Ver Revision mark Descriptions of revision Theory of operation Ver 1 0 May 2008 CONTENTS magicolor 4690MF main body Outline 1 System configuration 2 Product SpacificatiOns 2 1 te 3 Section configuration sess M dia p tvang 5 Image creation process Composition Operation 6 Overall Composition a csi tieni tecnici cite ee eie E 9 6 1 Timing chart at main body power 9 6 2 Control block diagram nennen nennen 10 7 Scanner section 7 1 Composition POs DN GE 9 5 ILI 13 7 3 1 When the Start key is 13 8 Write SOCON M 15 BA COMPOSITION sie oeste iH EE en p HE Aere Cea 15 8 2 Operation 8 2 1 OE TE
75. et A gt Drum cleaner isopropyl alcohol and roller cleaner ace tone based are highly flammable and must be handled amp I with care A risk of fire exists Do not replace the cover or turn the product ON before any solvent remnants on the cleaned parts have fully evaporated Q A risk of fire exists S 10 SAFETY AND IMPORTANT WARNING ITEMS Handling of Service Materials NCAUTION Use only a small amount of cleaner at a time and take care not to spill any liquid If this happens immediately wipe it off A risk of fire exists When using any solvent ventilate the room well Breathing large quantities of organic solvents can lead to discomfort Q ze GE SAFETY AND IMPORTANT WARNING ITEMS 4 Used Batteries Precautions ALL Areas CAUTION Danger of explosion if battery is incorrectly replaced Replace only with the same or equivalent type recommended by the manufacturer Dispose of used batteries according to the manufacturer s instructions Germany VORSICHT Explosionsgefahr bei unsachgemaBem Austausch der Batterie Ersatz nur durch denselben oder einen vom Hersteller empfohlenen gleichwertigen Typ Entsorgung gebrauchter Batterien nach Angaben des Herstellers France ATTENTION Il y a danger d explosion s il y a remplacement incorrect de la batterie Remplacer uniquement avec une batterie du m me type ou d un type quivalent recom mand par le co
76. ft on the surface of the PC drum is scraped off 5 Image creation process Theory of operation Ver 1 0 May 2008 LL o E 2 o G Blank Theory of operation Ver 1 0 May 2008 6 Overall Composition Composition Operation 6 Overall Composition 6 1 Timing chart at main body power on magicolor 4690MF Conditions A4S plain paper Polygon motor LD Transport motor M3 Color PC drum motor M2 Color developing motor M1 K developing motor M5 Charge K g 7 Q 9 7 s 9 Charge YMC Developing Y Developing Y Developing Y Developing Y TOD Y TOD M TOD C TOD K 1st transfer pressure retraction 1st transfer rem 2nd transfer pressure retraction 7 Ree ey es SSS E EE x ERES 2nd transfer rem A011T2E548AA 6 Overall Composition Theory of operation Ver 1 0 May 2008 6 2 Control block diagram 5 Y 5 8 Scanner Lower feeder unit Operation board NCU 1 1 ll 1 Print control board Media feed and conveyance MFP board MFPB e Process Image e CPU processing Fusing 1 e
77. g edge posi tion of the image 6 After having read the image the scanner unit moves to the home position and to the shading correction position magicolor 4690MF correction position Image trailing edge position 55 Q e 7 fe fo 9 Original AOFDT2C612AA 13 7 Scanner section Theory of operation Ver 1 0 May 2008 2 DF mode 2 1 When the start key is pressed the scanner unit moves to the home position S 2 The scanner unit moves to the shading correction position p 3 The operations of steps 1 and 2 are repeated twice 8 4 During the third operation the scanner unit moves from the shading correction m position to the original reading position 5 The scanner unit reads the image of the original fed from the auto document feeder at the original reading position 6 After having read the image the scanner unit moves to the shading correction posi tion Home position Original reading position Shading correction position ee Y TT 0 7 Q 7 fe iS Scan AOFDT2C510AA 14 Theory of operation Ver 1 0 May 2008 8 Write section 8 Write section 8 1 Composition magicolor 4690MF 4138t02001c0 G2 lens Separation mirror hy 7 Q 9
78. gainst the surface of the photo conductor to remove toner left off the surface fixed blade system 2 The toner which has been scraped off by the cleaning blade is conveyed by the toner collecting screw and collected in the waste toner transport section magicolor 4690MF Cleaning blade Photo conductor Cleaning blade Toner collecting screw A011T2C027DA A011T2C028DA 13 2 6 Toner collecting port shutter mechanism 0 7 Q 7 fe iS The toner collecting port is equipped with a shutter mechanism that prevents toner from being spilled out when the print unit is removed from the main body When the print unit is installed into the main body the shutter of the toner collecting port opens and toner can be discharged from the print unit Closed Toner collecting port Opened AO11T2CO29DA Toner collecting port A011T2C030DA 38 Theory of operation Ver 1 0 May 2008 14 Transfer section 1st transfer 14 1 Composition 14 Transfer section 1st transfer 1st image transfer retraction position sensor PS9 X Sliding plate y Retraction lever Y M C A011T2C527AA Transfer belt drive roller Transfer belt a EST op C 6 8 99 1st transfer roller Y Driven roller Cleaning blade Toner collecting screw
79. ght to a stop The cleaning sequence is carried out when a media size error occurs RS Q 7 fe fet iS 52 Theory of operation Ver 1 0 May 2008 16 Waste toner collecting section 16 Waste toner collecting section 16 1 Composition magicolor 4690MF A011T2C059DA K developing motor M5 Waste toner transport unit Toner collecting screw Print unit 7 Q 9 7 fo Waste toner collecting bottle 11 2 559 Suction transport unit 538 magicolor 4690MF 0 7 Q 7 fo E iS 16 Waste toner collecting section Theory of operation Ver 1 0 May 2008 16 2 Drive K developing motor M5 A Waste toner collecting screw Waste toner transport unit Waste toner collecting screw 9 2nd conveyance screw Suction transport unit Waste toner bottle 1st conveyance screw A011T2C560AA Waste toner bottle 54 Theory of operation Ver 1 0 May 2008 16 Waste toner collecting section 16 3 Operation 16 3 1 Toner flow at the 1st transfer section 1 Toner scraped off by the cleaning blade in the print unit is conveyed to the toner col lecting port by the toner collecting screw 2 The waste toner conveyed to the toner collecting port is conveyed to th
80. iconductor laser Synthetic mirror Photo conductor Return mirror 2nd G2 lens 413810250200 16 Theory of operation Ver 1 0 May 2008 8 Write section 8 2 3 Laser emission timing When a ready signal is detected after the lapse of a given period of time after the print cycle has been started a laser ON signal is output from the MFP board The laser ON signal triggers the firing of each laser light which illuminates the index board via the polygon mirror G1 lens separation mirror K and SOS lens This gener ates an SOS signal This SOS Start of Scan signal unifies the timing at which the laser lights are irradiated for each main scan line The SOS signal is generated only from the K laser light For the other colors the emis sion timing is determined with reference to K magicolor 4690MF 8 2 4 Laser emission area A Main scan direction FD The print start position in the FD direction is determined by the FD print start signal HSYNO that is output from the MFP board and the width of the media The laser emission area is determined by the media size However there is a 4 mm 0 157 inch wide void area on both the both edges of the media B Sub scan direction CD The print start position in the CD direction is determined by the CD print start signal TOD that is output from the MFP board and the length of the media However there is a 4 mm 0 157 inch wide void area on bo
81. ight blocking plate unblocks the 2nd image transfer retraction position sensor and a retracted position of the 2nd transfer roller is detected we image transfer retraction position sensor PS10 Retraction cam Retraction cam Retraction gear 2nd image transfer pressure retraction clutch CL5 A011T2C568AA When pressed When retracted 2nd transfer roller A011T2C556AA A011T2C555AA 50 Theory of operation Ver 1 0 May 2008 15 Transfer section 2nd transfer 15 3 2 2nd transfer voltage control The transfer voltage is applied to the 2nd transfer roller in order to transfer the toner image from the transfer belt to the media The transfer voltage is applied after the 2nd transfer roller has been pressed against the transfer belt magicolor 4690MF 15 3 3 2nd transfer voltage setting control ATVC auto transfer voltage control The transfer voltage is corrected to reduce effect from the transfer belt and environmen tal changes of toner A Operation timing e A print request is accepted During a multi print cycle the temperature inside the main body changes by a predeter mined value or more from the level during execution of ATVC and a predetermined num ber of printed pages or more have been produced since the execution of the previous ATVC B Control 1 1 The 2nd transfer roller is pressed against the transfer belt A constant current is applied to the 2nd transfer roller The vo
82. iling edge of the last sheet of media moves past the registration sen Sor the transport motor is de energized to bring the vertical transport roller to a stop Lower feeder unit Media feed clutch CL1 Vertical transport roller 0 Q 9 7 9 Feed roller Separation roller Transport motor M1 2 504 4 Operations Theory of operation Ver 1 0 May 2008 4 1 3 Media separation mechanism 5 A separation roller provided with a torque limiter is used to prevent double feeding of E media 2 o Feed roller Separation roller 4138to2115c0 4 1 4 Media detection mechanism The media feed sensor detects the media fed in by the feed roller When two lower feeder units are installed the sensor detects the media fed off from tray 3 When the media feed sensor actuator unblocks the media feed sensor the main body considers that the media has reached the sensor position S Q e 7 fe Theory of operation Ver 1 0 May 2008 4 Operations 4 1 5 Media supply level detection control There is a window in the front cover of the cassette for indicating the media supply level When the media lift plate goes up a red lever appears in the window The lower the level of the media stack in the tray the more red that is visible
83. ing and may result in fire or electric shock If proper wall outlet is not available advice the customer to contact qualified electrician for the installation Plug the power cord into the dedicated wall outlet with a capacity greater than the maximum power consumption Q If excessive current flows in the wall outlet fire may result If two or more power cords can be plugged into the wall outlet the total load must not exceed the rating of the wall outlet qb If excessive current flows in the wall outlet fire may result Make sure the power cord is plugged in the wall outlet securely Contact problems may lead to increased resistance overheating and the risk of fire 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 5 4 SAFETY AND IMPORTANT WARNING ITEMS Power Plug and Cord NWARNING When using the power cord set inlet type that came with this product make sure the connector is securely inserted in the inlet of the product When securing measure is provided secure the cord with the fixture properly If the power cord inlet type is not connected to the prod uct securely a contact problem may lead to increased resistance overheating and risk of fire Check whether the power cord is not stepped on or
84. iod of time elapses after the print cycle has been completed Forthe period of time during when the fusing pressure roller deformation prevention con trol is performed under the power save mode Forthe period of time when the thermistor provided in the print head detects the temper ature of predetermined degrees or more During when the image stabilization control is performed magicolor 4690MF Half speed rotation conditions The motor runs at a half speed during any time other than above Forced stop condition A malfunction occurs but not when an error occurs B Fusing fan motor control Full speed rotation conditions e For the period of time that begins when a print cycle starts and ends when a predeter mined period of time elapses after the print cycle has been completed Forthe period of time when the thermistor provided in the print head detects the temper ature of predetermined degrees or more During when the image stabilization control is performed RS 7 Q 7 fe 2 Half speed rotation conditions The motor runs at a half speed during any time other than above Stop conditions Stopped in the power save mode However the motor is not stopped for a predetermined period of time after a print cycle has been completed The temperature of the Fusing roller is below the specified one Forced stop condition Fo
85. ion it is called short edge feeding The feeding direction which is perpendicular to the short edge feeding is called the long edge feeding Short edge feeding will be identified with S abbreviation for Short edge feeding on the paper size No specific notation is added for the long edge feeding When the size has only the short edge feeding with no long edge feeding S will not be added to the paper size Sample notation Paper size Feeding direction Notation Long edge feeding A4 Short edge feeding A4S Short edge feeding A3 C 2 KONICA MINOLTA SERVICE MANUAL magicolor 4690MF Main Body 2008 05 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 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 Revision mark To indicate clearly a section revised A is shown at the left margin of the revised section The number inside A represents the number of times the revision has been made To indicate clearly a page that contains the revision is shown near the page number of the corresponding page The number inside A represents the numb
86. ion correction control image stabilization control or other control The 2nd transfer roller is retracted from the transfer belt after the 2nd transfer of the last image is completed during a multi print cycle 49 magicolor 4690MF po 7 Q 7 fe fet iS 15 Transfer section 2nd transfer Theory of operation Ver 1 0 May 2008 C Pressure retraction operation 1 Rotation of the Transport motor is transmitted to the drive roller of the intermediate transfer belt unit 2 Rotation of the drive roller is transmitted to the 2nd image transfer pressure retraction clutch 3 When the 2nd image transfer pressure retraction clutch is energized the rotation is transmitted to the pressure cam via a coupling gear 4 When the pressure cam turns a half turn the 2nd transfer roller is pressed against the transfer belt 5 Atthe same time the IDC sensor lever is pushed up to open the IDC sensor cover 6 The light blocking plate fitted on the shaft of the pressure cam blocks the 2nd image transfer retraction position sensor and a pressed position of the 2nd transfer roller is detected 7 When the 2nd image transfer pressure retraction clutch is energized a second time the pressure cam is turned another half turn The 2nd transfer roller to be retracted from the transfer belt At the same time the IDC sensor lever is released which closes the IDC sensor cover 8 The l
87. k Page vi Theory of operation Ver 1 0 May 2008 1 System configuration Outline 1 System configuration Lu z 5 o i 2 amp D G E AOFDF1C500DA 1 magicolor 4690MF 2 Lower feeder unit LL z o re 2 9 o G 2 Product specifications Theory of operation Ver 1 0 May 2008 2 Product specifications A Type Type Desktop tandem full color A4 laser beam printer Printing system Semiconductor laser and electrostatic image transfer to plain paper Exposure system 4 laser diode and 1 polygon mirror PC drum type OPC organic photo conductor Photoconductor cleaning Blade cleaning system Scan resolution 600 x 600 dpi 600 x 300 dpi Print resolution 2400 x 600 dpi 1200 x 600 dpi 600 x 600 dpi Copy resolution 600 x 600 dpi 1200 x 600 dpi Platen Stationary Registration Rear left edge Paper feeding system Tray1 100 sheets Tray2 250 sheets Tray3 500 sheets Option Developing system Single element developing system Charging system Needle charging system with Ozone suction feature Image transfer system Intermediate transfer belt system Paper separating System Curvature separation charge neutralizing system Fusing system Belt fusing Paper exit system Face down Output tray capacity 250 sheets B Functions Warm up time
88. lder or similar object Disabling relay functions such as wedging paper between relay contacts Q Disabling safety functions interlocks safety circuits etc Safety will not be assured leading to a risk of fire and Q injury Making any modification to the product unless instructed by KMBT Q Using parts not specified by KMBT 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 Power Cord Set or Power Plug NWARNING Use power supply cord set which meets the following criteria provided with a plug having configuration intended for the connection to wall outlet appropriate for the prod uct s rated voltage and current and the plug has pin terminal s for grounding and provided with three conductor cable having enough cur rent capacity and the cord set meets regulatory requirements for the area Use of inadequate cord set leads to fire or electric shock Attach power plug which meets the following criteria having configuration intended for the connection to wall outlet appropriate for the product s rated voltage and current and the plug has pin termi
89. lenoid SD1 7 Q 9 7 fo Top cover sensor PS1 Relay board 1 REYB1 Relay board 2 REYB2 AOFDT2C601AA Theory of operation Ver 1 0 May 2008 3 Drive 3 Drive AOFDT2C602AA JepeeJ oiny uonejedo uonisoduo Theory of operation Ver 1 0 May 2008 4 Mechanical operations 4 Mechanical operations 4 1 Document feed mechanism 4 1 1 Document feed mechanism The leading edge detection sensor mounted on relay board 1 detects a document that has been properly loaded in the document feeder The document stopper establishes the leading edge position of the document loaded in the document feeder The stopper is lowered in the standby state and raised when the document is taken up and fed in The document stopper is raised and lowered in synchronism with the raising and lower ing motion of the pick up roller The pick up roller and feed roller turn to take up and feed the original properly The pick up roller transports the original up to the feed roller The transport motor drives the pick up roller and feed roller through a gear train and the feed clutch Auto Document Feeder Unit Transport motor M1 S Q 9 7 9 Feed clutch CL1 Feed roller AOFDT2C603AA 4 Mechanical operations Theory
90. lock switch and actuator for loosening and check whether the interlock functions properly If the interlock does not function you may receive an electric shock or be injured when you insert your hand in the product e g for clearing paper jam Make sure the wiring cannot come into contact with sharp edges burrs or other pointed parts Current can leak leading to a risk of electric shock or fire Q o Q o POO S 9 SAFETY AND IMPORTANT WARNING ITEMS Safety Checkpoints NWARNING Make sure that all screws components wiring connec tors etc that were removed for safety check and mainte nance have been reinstalled in the original location Pay Xpcs special attention to forgotten connectors pinched cables Q E mr G forgotten screws etc E d A risk of product trouble electric shock and fire exists Handling of Consumables NWARNING 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 If the substances get in the eye rinse with plenty of water immediately When symptoms are noticeable consult a physician Never throw the used cartridge and toner into fire You may be burned due to dust explosion lt Handling of Service Materials NCAUTION Unplug the power cord from the wall outl
91. loop has been formed in the media before the reg istration roller If the output voltage of the sensor is less than a predetermined value the main body considers that the media is a type other than OHP transparencies If the output volt age is the predetermined value or more the main body determines that the media is OHP transparencies magicolor 4690MF Registration roller Prism Sensor Prism E Sensor output LED Remote lt Mf 4138t02583e0 4138to2103c1 2 Q 2 sensor PS7 amp 77 magicolor 4690MF S Q e 7 fe fo 20 Conveyance section Registration roller 20 3 6 Theory of operation Ver 1 0 May 2008 Media size error detection control To prevent incorrect printed pages the size of the media being conveyed is detected using the registration sensor and media feed sensor The length of the media is detected based on the value calculated using the period of time that begins when the sensor is activated and ends when it is deactivated for each media source Forthe lower feeder unit even if the media feed sensor does not detect a media size error the downstream registration sensor makes an error check again Media source Media length detection sensor Starting point Ending point Regis
92. ltage of the 2nd transfer roller surface is detected Using a conversion formula the output value of the transfer voltage is determined The current temperature inside the main body is detected and backed up o RON 0 7 Q 9 n E 9 51 15 Transfer section 2nd transfer Theory of operation Ver 1 0 May 2008 15 3 4 2ndtransfer roller cleaning control DC positive and negative transfer bias voltages are alternately applied to the 2nd transfer roller This allows toner residue on the surface of the 2nd transfer roller to be transferred back to the transfer belt thus cleaning the 2nd transfer roller Any voltage for other control purposes is not applied during the cleaning procedure The toner transferred back to the transfer belt is collected by the cleaning blade magicolor 4690MF 2nd transfer roller t aed 4 e ve Sc 9 x Transfer belt HV1 4138102579 0 Cleaning blade A Operation timing The power switch is turned ON The 2nd transfer roller cleaning sequence is carried out after the intermediate transfer belt has been cleaned during recovery from a media misfeed or malfunction f 100 printed pages or more have been produced after the last cleaning sequence when the printer completes a print cycle and is then brought to a stop a new cleaning sequence is carried out before the printer is brou
93. m Ashutter mechanism is provided to prevent waste toner from being spilled from the toner collecting port when the waste toner box is removed and reinstalled Placing the shutter lever in the locked position to the front side of the main body closes the shutter of the toner collecting port The transfer belt unit can be removed after removing the waste toner box closing the shutter of the toner collecting port and removing the fixing screws A preventive mechanism works to stop the transfer belt unit from being removed with the toner collecting port opened Due to the shutter lever interfering with the suction trans port unit the transfer belt unit cannot be removed until the shutter lever is placed in the locked position Similarly to install the transfer belt unit the shutter lever needs to be placed in the locked position so that the shutter lever will not interfere with the suction transport unit To prevent the toner collecting port shutter from leaving unopened after the installation of the transfer belt unit installing the waste toner box pushes the shutter lever of the toner collecting port and opens the collecting port magicolor 4690MF Locked Unlocked S 7 9 7 fe 9 ES p Shutter lever A011T2C035DA A011T2C036DA 47 15 Transfer section 2nd transfer Theory of operation Ver 1 0 May 2008 15 Transfe
94. n Fusing acceleration J 2nd transfer roller A011T2C545AA A011T2C546AA 81 magicolor 4690MF 0 7 Q 9 7 s 9 21 Fusing section Theory of operation Ver 1 0 May 2008 C Fusing roller deformation prevention control To prevent the fusing roller from being deformed the fusing roller is forcibly turned if it is left idle for a predetermined period of time Operation timing 1 Ifthe main body remains in the standby state for more than a predetermined period of time the fusing motor is turned for the predetermined period of time 2 Ifthe main body remains in the power save mode for more than a predetermined number of days the temperature adjustment is started After the temperature rises to a predetermined value or more the fusing motor is turned for a predetermined period of time magicolor 4690MF D Media exit detection control The exit sensor detects the media conveyed from the fusing roller The exit sensor is placed right after the fusing roller in order to detect the media jam and prevent the media from being wound to the fusing roller Actuator Rs 7 Q 7 fe 55 iS xit sensor PS8 A011T2C580AA 82 Theory of operation Ver 1 0 May 2008 21 Fusing section 21 3 2 Fusing temperature control To fuse
95. n two screws that secure the edge guide plate 2 Accessing the tray from its bottom surface loosen two screws that secure the refer ence position adjusting plate 3 Slide the reference position adjusting plate as necessary as indicated on the scale 4 From the bottom surface of the tray tighten the two screws that secure the refer ence position adjusting plate 5 Through the hole in the media lift plate on top of the tray tighten the two screws that secure the edge guide plate c _ o Fa o 5 Media lift plate 2 w 5 Edge guide plate fixing screws TS 2 E pat 5 4138102125 0 or Adjustment scale Reference position imm adjusting plate 4138102123 0 Reference position adjusting plate fixing screws 4 1 11 Media misfeed detection control f the media feed sensor is not activated within a predetermined period of time after media feed sequence has been started the main body determines that there is a media misfeed It then displays a media misfeed message on the panel The media misfeed display can be reset by opening and closing any door 10 IKONICA MINOLTA 2008 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Use of this manual should be strictly supervised to MEER avoid disclosure of confidential information TM
96. nal s for grounding and meets regulatory requirements for the area Use of inadequate cord set leads to the product connect ing to inadequate power supply voltage current capacity grounding and may result in fire or electric shock Conductors in the power cable must be connected to ter minals of the plug according to the following order Black or Brown L line White or Light Blue N neutral Q Green Yellow PE earth Wrong connection may cancel safeguards within the product and results in fire or electric shock S 3 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 customer engi neer hereafter called the CE from the risk of injury However in daily use any electrical equipment may be subject to parts wear and eventual failure In order to maintain safety and reliability the CE must perform regular safety checks 1 Power Supply Connection to Power Supply NWARNING Check that mains voltage is as specified Connection to wrong voltage supply may result in fire or Q electric shock Connect power plug directly into wall outlet having same configuration as the plug Use of an adapter leads to the product connecting to inadequate power supply voltage current capacity aD ground
97. nce screw The agitating blade provided in the toner cartridge agitates and conveys toner to the con veyance screw The toner conveyed by the agitating blade is conveyed to the toner collecting port sitting on the front side of the main body by the conveyance screw magicolor 4690MF A011T2CO06DA Toner collecting port Agitating blade Conveyance screw gp Rear side g 7 Q 9 7 E s 9 Agitating blade Conveyance screw A011T2C007DA A011T2C009DA 21 9 Toner supply section Theory of operation Ver 1 0 May 2008 9 3 2 Toner collecting port shutter mechanism The toner collecting port is equipped with a shutter mechanism that prevents toner from being spilled out when the toner cartridge is removed from the main body After installing the toner cartridge into the main body placing the print unit release lever in its locked position opens the shutter of the toner collecting port Then toner can be conveyed to the main body Moving the print unit release lever to the right or left accompanies the synchronizing movement of the slider This makes the gear connected to the shutter rotated and then makes the shutter opened or closed To prevent the front door from getting closed while the shutter is open the
98. ng screens 3 Waste toner conveyed to the rear end of the box is conveyed up to the detection window by the agitating blade When the waste toner conveyed to the detection window blocks the waste toner sensor the waste toner near full condition is detected Top view 1st conveyance screw 2nd conveyance screw Waste toner sensor PS11 Detection window Agitating blade Dividing screens A011T2C048DA 59 magicolor 4690MF 0 7 9 n E 9 16 Waste toner collecting section Theory of operation Ver 1 0 May 2008 16 3 9 Waste toner near full condition detection control waste toner near full condition is detected when the waste toner sensor continuously blocks for a predetermined period of time Atthis time a waste toner near full condition warning is given on the panel magicolor 4690MF When the sensor is unblocked When the sensor is blocked Detection window Waste toner sensor PS11 AO11T2C049DA 16 3 10 Waste toner full condition detection control A waste toner full condition is detected when the cumulative total number of print dots 5 waste toner detection dot count exceeds a predetermined value after waste toner box 5 near full condition has been detected e A waste toner full condition warning is given on
99. ns 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 Revision mark To indicate clearly a section revised A is shown at the left margin of the revised section The number inside A represents the number of times the revision has been made To indicate clearly a page that contains the revision is shown near the page number of the corresponding page The number inside A represents the number of times the revision has been made NOTE Revision marks shown in a page are restricted only to the latest ones with the old ones deleted When a page revised in Ver 2 0 has been changed in Ver 3 0 The revision marks for Ver 3 0 only are shown with those for Ver 2 0 deleted When a page revised in Ver 2 0 has not been changed in Ver 3 0 The revision marks for Ver 2 0 are left as they are 2008 05 1 0 Issue of the first edition Date Service manual Ver Revision mark Descriptions of revision Theory of operation Ver 1 0 May 2008 CONTENTS Lower feeder unit Outline 1 Product specifications rcs 1 Composition Operation 2 Overall COMPOSILION cocci cotidie Andie arr anaes mati 3 3 DIVO 4 4 OPGIALIONS MEE 4 AA Medi
100. nstructeur Mettre au rebut les batteries usag es conform ment aux instructions du fabricant Denmark ADVARSEL Lithiumbatteri Eksplosionsfare ved fejlagtig h ndtering Udskiftning m kun ske med batteri af samme fabrikat og type Lev r det brugte batteri tilbage til leveranderen Finland Sweden VAROITUS Paristo voi rajahtaa jos se on virheellisesti asennettu Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin H vit k ytetty paristo valmistajan ohjeiden mukaisesti VARNING Explosionsfara vid felaktigt batteribyte Anv nd samma batterityp eller en ekvivalent typ som rekommenderas av apparat tillverkaren Kassera anv nt batteri enligt fabrikantens instruktion Norway ADVARSEL Eksplosjonsfare ved feilaktig skifte av batteri Benytt samme batteritype eller en tilsvarende type anbefalt av apparatfabrikanten Brukte batterier kasseres i henhold til fabrikantens instruksjoner S 12 SAFETY AND IMPORTANT WARNING ITEMS b 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 5 1 Internal Laser Radiation semiconductor laser Maximum power of the laser diode 15 mW Maximum average radiation power 8 5 uW Wavelength 770 800 nm at laser aperture of the Print Head Unit This product employs a Class 3B laser diode that emits
101. nterclockwise Stationary Turned Stationary Stationary IC IK M7 Forward clockwise Stationary Stationary Turned Stationary Backward counterclockwise Stationary Stationary Stationary Turned When the motor turns forward When the motor turns backward Toner supply motor M6 Toner supply motor M7 EN 58 4 Y 3 fk Gf A AR C e a cH K Y c 413810201300 4138102014 0 Y C one way clutch turns M K one way clutch turns 23 magicolor 4690MF 0 7 Q 9 7 s 9 9 Toner supply section Theory of operation Ver 1 0 May 2008 9 3 4 Toner level detection The toner level is determined by the accumulated time of rotation of the toner supply motor The toner level can be checked through MENU PRINT MENU STATISTICS PAGE 9 3 5 Toner near empty condition detection magicolor 4690MF The cumulative period of time through which the toner supply motor is energized is detected as the basis for determining whether there is a toner near empty condition The main body is designed to indicate a toner near empty condition when the toner level remaining in the toner cartridge becomes approx 40 percent Toner remaining Pages that can be printed after toner near Toner cartridge level empty detection Targeted number of Targeted percent pages Quantity equivalent to 3 000 printed Approx 1 200 sheets Qu
102. ntrol User selection When quality menu calibra tion AIDC process is selected When quality menu calibra tion AIDC process is selected Complete correction control 1 Since the main body is not provided with a function that detects a new transfer belt unit quality menu calibration AIDC process must be selected and complete correction con trol executed whenever the unit has been replaced with a new one 102 Theory of operation Ver 1 0 May 2008 26 Miscellaneous 26 Miscellaneous 26 1 Fan control 26 1 1 Composition magicolor 4690MF Defogger fan motor FM5 7 Fusing fan motor FM2 Duplex cooling fan motor DC power supply fan motor FM1 Ozone ventilation fan motor FM3 AOFDT2C527AA 26 1 2 Function A DC power supply fan motor Discharges heat generated from the interior parts including the DC power supply inter mediate transfer belt section toner cartridges C M Y and motor drives from the main body to prevent the interior temperature from rising inordinately g 7 Q 9 n E 9 B Fusing fan motor Fusing fan motor discharges heat generated from the interior parts including the DC power supply fusing unit toner cartridges K and motor drives out of the main body to prevent the interior temperature from rising inordinately Air passageway is formed on top of the DC power supply in th
103. oaded in position Load a media stack and then slide the tray into the main body This causes the lock release lever to unlock the media lift plate The media lift plate media stack is pressed against the feed roller The media lift plate media stack is pressed upward by the springs at all times 0 7 Q 7 fe iS Media lift plate Feed roller 4138t02605c0 66 Theory of operation Ver 1 0 May 2008 18 Media feed section Tray 2 18 3 2 Media separation mechanism Drive from the transport motor is transmitted through the tray2 media feed clutch to turn the feed roller The feed roller rotates to take up and feed media into the main body Double feeding of media is prevented by the separation roller provided with a torque lim iter magicolor 4690MF Feed roller Separation roller 4138t02089c0 18 3 3 Media feed control Drive from the transport motor is transmitted through the tray2 media feed clutch to turn the feed roller thereby taking up and feeding the media The media taken up and fed in is conveyed onto the registration roller The media is pressed against the stationary registration roller so that a loop is formed in the media The feed roller is then stopped The loop thus formed in the media corrects any mechanical skew in the media Asthe trailing edge of the media reaches a point imm
104. olding plate and the edge of the plate activates the media full sensor After all media is discharged the media holding plate goes down and the edge of the plate shades the media full sensor If the sensor is shaded the printed media is judged to not have reached the maximum load capacity yet After all media is discharged if the output media in the exit tray keeps the media holding plate up and the media full sensor remains activated the printed media is judged to have reached the maximum load capacity and the operation panel displays the message e f the sensor detects that the exit tray is full printing is stopped magicolor 4690MF When the tray is empty S 7 9 7 s 9 Exit sensor 2 PS31 AOFDT2C524AA When the tray is full Media full sensor PS32 AOFDT2C525AA 99 magicolor 4690MF w S Q e 7 fe 25 Image stabilization control Theory of operation Ver 1 0 May 2008 25 Image stabilization control To ensure that a stabilized output image is produced at all times a comprehensive con trol is provided for the developing bias voltage laser light intensity registration correction gamma characteristics detection and other parameters 25 1 Overview of image stabilization control Image stabilization control may be divided into thre
105. ongly recommends that all servicing be performed only by KMBT trained service technicians Changes may have been made to this product to improve its performance after this Service Manual was printed Accordingly KMBT does not warrant either explicitly or implicitly that the information contained in this service manual is complete and accurate The user of this service manual must assume all risks of personal injury and or damage to the product while servicing the product for which this service manual is intended Therefore this service manual must be carefully read before doing service work both in the course of technical training and even after that for performing maintenance and control of the product properly Keep this service manual also for future service DESCRIPTION ITEMS FOR DANGER WARNING AND CAUTION In this service manual each of three expressions AN DANGER A WARNING and CAUTION is defined as follows together with a symbol mark to be used in a limited meaning When servicing the product the relevant works disassembling reassembling adjustment repair maintenance etc need to be conducted with utmost care IN DANGER Action having a high possibility of suffering death or serious injur A WARNING Action having a possibility of suffering death or serious injury IN CAUTION Action having a possibility of suffering a slight wound medium trouble and property damage Symbols used
106. oping motor M5 Charge Charge YMC 4 A011T2C574AA 12 2 2 Ozone ventilation mechanism Ozone stagnant in areas near the charge corona unit reduces sensitivity of the photo conductor causing white bands to occur in the image The ozone filter is used to remove ozone produced by the charge corona unit thereby preventing sensitivity of the photo conductor surface from being degraded Outside air is drawn in through the opening provided at the front end of the charge corona unit and is discharged together with ozone through the opening provided in the rear The ozone ventilation fan motor located in the rear of the main body draws air to allow the discharged ozone to be removed by the ozone filter 0 7 Q 7 fe fet iS Ozone filter c s Ozone ventilation fan motor FM3 A011T2C579AA 32 Theory of operation Ver 1 0 May 2008 13 Print unit section developing 13 Print unit section developing 13 1 Composition magicolor 4690MF K developing motor M5 A011T2C512AA A011T2C526AA i 2 Replenishing screw Photo conductor 5 Cleaning o blade 5 E Charge 2 corona 5 5 Agitating screw Supply roller Developing roller Toner collecting Screw A011T2C014DA Color developing motor M1
107. per feed not guaranteed originals Theory of operation Ver 1 0 May 2008 f fed paper feed will be possible to some extent but trouble occurrence will be possible Type of original Possible trouble Sheets lightly curled Curled amount 10 15 mm Dog eared exit failure Heat sensitive paper Edge folded exit failure transport failure Translucent paper Take up failure transport failure Paper immediately after paper exit from the main unit Take up failure transport failure Paper with many punched holes e g loose leaf limited to vertical feeding Multi page feed due to flashes from holes Sheets with 2 to 4 holes Transport failure Sheets two folded or Z folded Transport failure image deformation Sheets folded Image deformation multi page feed take up failure G Machine specifications Power requirements DC 24 V supplied from the main body DC 5 V supplied from the main body Max power consumption 30 W or less 506 mm W x 432 mm D x 89 mm H Dimensiong 20 inch W x 17 inch D x 3 5 inch H Weight 4 5 kg 10 Ib H Operating Conforms to the operating environment of the main body NOTE These specifications are subject to change without notice Theory of operation Ver 1 0 May 2008 2 Composition Composition operation 2 Composition Auto Document Feeder Unit AOFDT2C613AA Route change so
108. poSition orn ri ette er Ceci a e e ee Cet eR 48 49 D Eenruum 49 15 3 1 2nd transfer roller pressure mechanism eese 49 15 3 2 2ndtransfer voltage control 51 15 8 3 2nd transfer voltage setting control ATVC auto transfer voltage control 51 15 3 4 2ndtransfer roller cleaning control sese 52 16 Waste toner collecting 53 16 1 Gomposition E Pm 53 LU H PRM 54 DENM ud m en 16 3 1 Toner flow at the 1st transfer section 16 3 2 Toner flow at the 2nd transfer section 16 3 3 Toner collecting port shutter mechanism at the suction transport unit 57 16 3 4 Toner collecting port shutter mechanism of the waste toner bottle 57 16 3 5 Waste toner box locking mechanism essere 58 16 3 6 Waste toner box locked position detection mechanism 58 16 3 7 Waste toner box in position detection 59 16 3 8 Waste toner flow in the waste toner box 59 16 3 9 Waste toner near full condition detection 60 16 3 10 Waste toner full condition detection control eese 60 1
109. pushing down the lever after the upper door has been raised magicolor 4690MF AOFDT2C508AA Composition Operation AOFDT2C509AA 96 Theory of operation Ver 1 0 May 2008 24 Media exit section 24 4 Composition 24 Media exit section AOFDT2C517AA Media full sensor PS32 Exit tray Exit roller 2 E Exit sensor 2 PS31 AOFDT2C523AA 97 magicolor 4690MF hy 7 Q 9 7 fo 9 magicolor 4690MF Rs 7 N fe 2 iS 24 Media exit section Theory of operation Ver 1 0 May 2008 24 2 Drive AOFDT2C513AA 24 3 Operation 24 3 1 Media exit control The media is fed out by the exit roller 2 The exit roller 2 is driven by gears and belts using the drive provided by the fusing motor of the main unit The exit sensor 2 mounted in the horizontal conveyance unit detects the media fed out into the exit tray Exit roller 2 Exit sensor 2 AOFDT2C526AA 98 Theory of operation Ver 1 0 May 2008 24 Media exit section 24 3 2 Media full detection The media full sensor detects the load capacity of output media in the exit tray When the media holding plate is low the edge of the media holding plate shades the media full sensor When printing starts the output media pushes up the media h
110. r section 2nd transfer 15 1 Composition 2nd transfer roller magicolor 4690MF A011T2C528AA Retraction gear 0 7 Q 7 fe iS 2nd transfer roller Pre transfer guide plate A011T2C567AA 48 Theory of operation Ver 1 0 May 2008 15 Transfer section 2nd transfer 15 2 Drive magicolor 4690MF 2nd image transfer pressure retraction clutch CL5 A011T2C566AA 15 3 Operation 15 3 1 2nd transfer roller pressure mechanism 0 7 Q 9 7 E 9 The main body is provided with a mechanism that presses the 2nd transfer roller up against and retracts it from the transfer belt This is done to prevent the 2nd transfer roller from being dirtied due to patterns produced for purposes other than an actual print ing operation Such patterns may be produced during the image stabilization sequence or another function A 2ndtransfer roller pressure The 2nd transfer roller is pressed against the transfer belt to allow the toner image on the transfer belt to be transferred onto the media The 2nd transfer roller is pressed against the transfer belt to allow the roller to be cleaned B 2nd transfer roller retraction The 2nd transfer roller is retracted from the transfer belt when a detection pattern is pro duced on the transfer belt for registrat
111. ransport unit The toner conveyed is stored into in the waste toner box by the conveyance screw provided in the waste toner box Waste toner collecting screw Transfer belt unit J 2nd conveyance screw Waste toner collecting screw Waste toner bottle Suction transport unit ROTITSCESSAA 1st conveyance screw Waste toner bottle 56 Theory of operation Ver 1 0 May 2008 16 Waste toner collecting section 16 3 3 Toner collecting port shutter mechanism at the suction transport unit A dual shutter is used to prevent waste toner from being spilled from the toner collecting port when the waste toner box is removed and reinstalled Placing the box lock lever of the waste toner box in the unlocked position the 9 o clock position closes the first shutter of the toner collecting port Removing the waste toner box closes the second shutter magicolor 4690MF A011T2C041DA A011T2C042DA 16 3 4 Toner collecting port shutter mechanism of the waste toner bottle 0 7 Q 9 n E 9 A shutter is used to prevent waste toner from being spilled from the toner collecting port when the waste toner box is removed and reinstalled Placing the box lock lever of the waste toner box in the unlocked position the 9 o clock position closes the shutter of the toner collecting port Box lock lever Box lock lever A011T
112. refore 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 Revision mark To indicate clearly a section revised A is shown at the left margin of the revised section The number inside A represents the number of times the revision has been made To indicate clearly a page that contains the revision is shown near the page number of the corresponding page The number inside A represents the number of times the revision has been made NOTE Revision marks shown in a page are restricted only to the latest ones with the old ones deleted When a page revised in Ver 2 0 has been changed in Ver 3 0 The revision marks for Ver 3 0 only are shown with those for Ver 2 0 deleted When a page revised in Ver 2 0 has not been changed in Ver 3 0 The revision marks for Ver 2 0 are left as they are 2008 05 1 0 Issue of the first edition Date Service manual Ver Revision mark Descriptions of revision Theory of operation Ver 1 0 May 2008 CONTENTS Auto document feeder unit Outline 1 Product SpecificaliOris 2 cii c eate possa t Rn e SERIA XR ERRARE FERA XE MER Hatt 1 Composition operation 2 COMPOSION ED 3 3 plc 4 4 Mechanical operations
113. rm amount of toner sticking the solid image to the transfer belt To correct the target level of fluctuations in fine line reproduction and re reverse image white on black reproduction that occur due to variations Laser light intensity con i Mer 4 5 trol in photo conductor electrostatic characteristics developing characteris tics and transfer characteristics part to part variations environment durability To correct the tone by using the IDC sensor to measure the density of a Gamma characteristics 6 gradation pattern produced on the transfer belt and sending the results detection control of the measurement to the controller 7 Registration correction To correct incorrect color registration that occurs due to variations in control parts of the main body used for regulating different drawing positions 100 Theory of operation Ver 1 0 May 2008 25 Image stabilization control 25 1 2 Simplified correction control f the simplified correction control is not effective in making a good correction the com plete correction control is executed Control name Purpose magicolor 4690MF To check the low gain output value and offset voltage value of t IDC sensor ofset valye check the IDC sensor when the shutter is closed To check the low gain output value of the IDC sensor using 2 DC sensor reflection output the intensity value set last for the clear transfer belt surface on which no toner
114. rom the exit roller to prevent the leading and trailing edges of the original from being pinched between the roller and rolls 6 In order to keep the proper order of the original the original fed out into the exit tray is taken up again and transported through the registration roller and exit roller back into the exit tray S Q 9 n 9 AOFDT2C611AA 11 4 Mechanical operations Theory of operation Ver 1 0 May 2008 4 4 Miscellaneous 4 4 1 Document feeder raised lowered position detection mechanism There is a magnet provided in the document feeder allowing the printer to detect the position of the document feeder whether the document feeder is raised or lowered This magnet attracts the original cover set switch provided on the printer side thus acti vating the sensor The printer will then detect the position of the document feeder Auto Document Feeder Unit Magnet Rs 7 Q lt 7 fe fet Original cover set Switch RS100 BOEDIESCO AAA 12 KONICA MINOLTA SERVICE MANUAL Lower Feeder Unit 2008 05 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 Revision history After publication of this service manual the parts and mechanism may be subject to change for improvement of their performance Therefore the descriptio
115. rthe period of time that begins when the warm up cycle is started and ends when the warm up cycle is complete A malfunction occurs but not when an error occurs 104 Theory of operation Ver 1 0 May 2008 26 Miscellaneous C Ozone ventilation fan motor Full speed rotation conditions Atthe start of a warm up cycle During a print cycle During when the image stabilization control is performed e For the period of time when the thermistor 3 provided in the print head detects the tem perature of predetermined degrees or more magicolor 4690MF Stop conditions A predetermined period of time elapses after a warm up cycle is completed Atthe end of a print cycle During the power save mode The motor is not however stopped for a predetermined period of time after a predrive is complete Forced stop condition A malfunction occurs but not when an error occurs D Duplex cooling fan motor control Full speed rotation conditions Forthe period of time when the thermistor provided in the print head detects the temper ature of predetermined degrees or more Forthe period of time that begins when a print cycle starts and ends when a predeter mined period of time elapses after the print cycle has been completed During when the image stabilization control is performed 3 7 Q 9 7 E 9 Stop conditions During the power save mod
116. s and change of environment affect the IDC sensor output corresponding to the clear transfer belt surface To correct fluctuations in the output the sensor LED intensity is adjusted so as to keep constant the IDC sensor output value 19 2 3 IDC sensor shutter mechanism Since the IDC sensor is installed below the transfer belt it can be dirtied with toner or other foreign matter A shutter mechanism is therefore provided above the IDC sensor to prevent it from being dirtied The shutter is opened or closed in synchronism with the pressure or retraction motion of the 2nd transfer roller When the 2nd transfer roller is pressed the Cam pushes up the sensor lever which opens the shutter above the IDC sensor When the 2nd transfer roller is released the shutter above the IDC sensor is closed by the tension of a spring Shutter Cam A011T2C581AA 72 Theory of operation Ver 1 0 May 2008 20 Conveyance section Registration roller 20 Conveyance section Registration roller 20 4 Composition magicolor 4690MF A011T2C531AA Media loop sensor PS6 2nd transfer roller hy 7 Q 9 7 fo egistration roller Registration sensor PS4 Rn A011T2C570AA 73 20 Conveyance section Registration roller Theory of operation Ver 1 0 May 2008 20 2 Drive Transport motor M3 Registration roller
117. scribed procedure or tool is not used the prod uct may break and a risk of injury or fire exists Before conducting an inspection be sure to disconnect the power plugs from the product and options When the power plug is inserted in the wall outlet some amp units are still powered even if the POWER switch is turned OFF A risk of electric shock exists The area around the fixing unit is hot You may get burnt S 7 SAFETY AND IMPORTANT WARNING ITEMS Work Performed with the Product Powered On NWARNING Take every care when making adjustments or performing an operation check with the product powered If you make adjustments or perform an operation check with the external cover detached you may touch live or high voltage parts or you may be caught in moving gears or the timing belt leading to a risk of injury Take every care when servicing with the external cover detached High voltage exists around the drum unit A risk of elec A tric shock exists Safety Checkpoints NWARNING e Check the exterior and frame for edges burrs and other damage ap The user or CE may be injured Do not allow any metal parts such as clips staples and screws to fall into the product They can short internal circuits and cause electric shock Q a or fire Check wiring for squeezing and any other damage Current can leak leading to a risk of electric
118. ser light is controlled based on the image sig image processing board nal transmitted to this board 4 PC drum The image of the original projected onto the surface of the PC drum is changed to a corresponding electrostatic latent image 5 PC drum charging Apply DC charge to the photo conductor 6 LD exposure The surface of the PC drum is irradiated with laser light and an electrostatic latent image is thereby formed 7 Developing The toner agitated and negatively charged in the toner chamber is attracted onto the electrostatic latent image formed on the surface of the PC drum It is thereby changed to a visible developed image 8 1st image transfer ADC positive voltage is applied to the backside of the transfer belt thereby allowing the visible developed image on the surface of each of the PC drums Y M C and K to be transferred onto the transfer belt 9 2nd image transfer A DC positive voltage is applied to the backside of the media thereby allowing the visible developed image on the surface of the transfer belt to be transferred onto the media 10 Media separation The media which has undergone the 2nd image transfer process is neutralized so that it can be properly separated from the transfer belt 11 Transfer belt cleaning The residual toner left on the surface of the transfer belt is scraped off 12 PC drum cleaning The residual toner le
119. shock or ap fire Carefully remove all toner remnants and dust from electri cal parts and electrode units such as a charging corona unit Q Current can leak leading to a risk of product trouble or fire Check high voltage cables and sheaths for any damage Current can leak leading to a risk of electric shock or fire ap J AN S 8 SAFETY AND IMPORTANT WARNING ITEMS Safety Checkpoints NWARNING Check electrode units such as a charging corona unit for deterioration and sign of leakage Current can leak leading to a risk of trouble or fire Before disassembling or adjusting the write unit P H unit incorporating a laser make sure that the power cord has been disconnected The laser light can enter your eye leading to a risk of loss of eyesight 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 When replacing a lithium battery replace it with a new lith ium battery specified in the Parts Guide Manual Dispose of the used lithium battery using the method specified by local authority Improper replacement can cause explosion After replacing a part to which AC voltage is applied e g optical lamp and fixing lamp be sure to check the installa tion state A risk of fire exists e Check the inter
120. sticks Developing bias control simplified To determine whether there is a leak based on the measure Vpp check ment value taken last Developing bias duty control 4 control of the maximum amount of toner sticking to the transfer belt To correct the amount of toner based on the measurement value taken last Laser light intensity control 5 REC To correct based on the measurement value taken last simplified correction control To correct incorrect color registration that occurs due to varia 6 Registration correction control tions in parts of the main body used for regulating different simplified control drawing positions The simplified control uses a simplified registration pattern to make the correction 25 1 3 Individual registration control i 55 7 fo 9 Control name Purpose To check the low gain output value of the IDC sensor using 1 IDC sensor reflection output the intensity value set last for the clear transfer belt surface on which no toner sticks To correct incorrect color registration that occurs due to varia tions in parts of the main body used for regulating different drawing positions Registration correction control simplified control 101 magicolor 4690MF w S Q e 7 fe fo 25 Image stabilization control
121. t image moves past the 2nd transfer sec tion magicolor 4690MF 14 3 2 1st transfer roller pressure retraction control To extend the service life of the photo conductor Y M C the pressure position of the 1st transfer roller is changed between the monochrome mode and the color mode The 1st transfer roller K is not provided with a retraction mechanism the transfer belt is pressed against the photo conductor K at all times The Transport motor provides the drive for pressure retraction operation of the 1st trans fer roller Y M C A Monochrome mode The 1st transfer roller Y M C is moved inward the unit for retraction and the photo con ductor Y M C is stopped The transfer roller is moved retracted and the photo conduc tor is stopped also in the ordinary standby state S 7 Q 9 7 E 9 B Color mode During the 1st transfer in the color mode the 1st transfer roller Y M C is moved toward the photo conductor pressed so that transfer belt is pressed against the photo conduc tor C Others The transfer roller is moved retracted and the photo conductor is stopped in the ordi nary standby state 41 14 Transfer section 1st transfer Theory of operation Ver 1 0 May 2008 14 3 3 1st transfer roller pressure operation 1 Rotation of the Transport motor is transmitted by a gear train to the 1st image trans fer pressure retraction clutch
122. th edges of the media The laser emission area is determined by the media size However there is a 4 mm 0 157 inch wide void area on both the leading and trailing edges of the media HSYNC jj NIDEO Q e 7 fe 9 VIDEO TOD Void width 4 mm 0 157 inch Void width 4 mm 0 157 inch m Void width 4 mm 0 157 inch Void width 4 mm 0 157 inch 4138102595 0 17 magicolor 4690MF 0 7 7 fe a iS 8 Write section Theory of operation Ver 1 0 May 2008 8 2 5 Laser light intensity control The laser light intensity control corrects the target level of fluctuations in fine line repro duction and reverse image white on black reproduction that occur due to variations in photo conductor electrostatic characteristics developing characteristics and transfer characteristics part to part variations environment durability It is controlled integrally with other control items by the image stabilization control The laser light intensity control is performed when there is a request made for execution of an image stabilization sequence 8 2 6 Registration correction control 18 In a tandem engine that has an image forming process for each color of toner incorrect color registration tends to occur due to variations in parts of the main body used for r
123. the transfer belt Noforced cleaning sequence is carried out to clean the entire surface of the transfer belt magicolor 4690MF A Operation timing The ist transfer cleaning sequence is carried out before the 2nd transfer cleaning as part of the initial operation sequence The 1st transfer cleaning sequence is carried out before the 2nd transfer cleaning opera tion is performed by the ATVC control system 4138102049 1 N y N J v N 1st transfer belt cleaning area 14 3 8 1st transfer belt backward rotation control 0 7 Q 7 fe iS To prevent media dust toner and other foreign matter from being wedged in the cleaning blade while the transfer belt remains stationary the transfer belt is turned backward so that the foreign matter can be removed Once the transfer belt is started turning backward this operation takes precedence over any other request for energizing the Transport motor Such a request is honored after the backward rotation control is completed A Operation timing The 1st transfer belt backward rotation is performed after a predetermined number of printed pages are produced after the execution of the last backward rotation control 46 Theory of operation Ver 1 0 May 2008 14 Transfer section 1st transfer 14 3 9 Toner collecting port shutter mechanis
124. tion photo conductor Theory of operation Ver 1 0 May 2008 11 Print unit section photo conductor 11 1 Composition Photo conductor is z S 8 Photo conductor 8 A011T2C526AA 4138102018 4 2 Charge transport layer Aluminum base S Q o a fe generating layer Di rection of 4138t02505c1 rotation 11 2 Drive Transport motor M3 ui ne p M3 Color PC drum motor M2 Photo conductor A011T2C015DA 28 Theory of operation Ver 1 0 May 2008 11 Print unit section photo conductor 11 3 Operation 11 3 1 Photo conductor drive mechanism Motors are used for the drive mechanism independently of the developing system to sup press incorrect color registration and uneven pitch To stop the drive for the color toner cartridges in the monochrome mode different motors are used to drive the color photo conductors and black photo conductor The color PC drum motor drives the photo conductor Y M and C while the Transport motor drives the photo conductor K n addition to the photo conductor K the Transport motor also drives the transfer system media feed system and synchronizing drive system Gears having a large diameter are used to enhance rotating accuracy of the photo con ductors The use of gears having a large diameter provides a large number of gear teeth which suppresses unev
125. tor blade 1st and 2nd regulate the height of toner on the sur face of the developing roller Toner on the developing roller is fed to the electrostatic latent image formed on the surface of the photo conductor Toner left on the developing roller is neutralized and returned to the supply roller The toner on the surface of the photo conductor is transferred onto the transfer belt Toner left on the surface of the photo conductor is scraped off by the cleaning blade The toner scraped off by the cleaning blade is conveyed to the waste toner convey ance section by the toner collecting screw The toner conveyed by the toner collecting screw is conveyed and stored as waste toner in the waste toner bottle Toner collecting port QUT Transfer belt Replenishing screw Agitating screw Developing roller Toner collecting screw A011T2E079DA Photo conductor Cleaning blade Supply roller Toner collecting screw 36 Theory of operation Ver 1 0 May 2008 13 Print unit section developing 13 2 4 Developing system Two types of developing systems are used a non contact developing system and an alternating current application system 1 Anegative charge supply bias voltage Vr is applied the supply roller to regulate the amount of toner sticking to the developing roller 2 Anegative charge blade bias voltage Vb1 is applied to the regulator bl
126. tration roller clutch Registration sensor Lower feeder unit Tray 1 Registration sensor PS4 CL2 ON PS4 OFF Registration roller clutch Registration sensor Tray 2 Registration sensor PS4 CL2 ON PS4 OFF Media feed sensor Media feed sensor PS2 Media feed sensor PS4 Tray 3 PS2 Tray 3 ON OFF Registration sensor PS4 Registration roller clutch CL2 ON Media feed sensor PS4 OFF 20 3 7 Temperature humidity sensor The temperature humidity sensor detects temperature and humidity inside the main body The detected data are used for image stabilization control ATVC control and transfer output control 78 Theory of operation Ver 1 0 May 2008 21 Fusing section 21 Fusing section 21 4 Composition magicolor 4690MF A011T2C532AA Exit roller Fusing heater Thermistor 1 hy 7 Q 9 7 fo 9 Thermostat Thermistor 2 Fusing roller Pressure belt A011T2C542AA 79 21 Fusing section Theory of operation Ver 1 0 May 2008 21 2 Drive magicolor 4690MF Pressure belt Fusing roller Fusing motor M4 A011T2C543AA 0 Q 7 fe Q iS 21 3 Operation 21 3 1 Fusing roller drive control A Fusing speed switching control The fusing motor provides drive for

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