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10 - general

1. 15 7 3 3 Original Size Detection dialer 15 8 Wiite sectiom PEH sectlon iico iii rior ni Ei err rnit Er Lc rn ctos 16 8 4 Composition cer tite cot nasi ite ati Aaa 16 8 2 Operation e mei eee tei ber Een nasa 17 8 2 1 eng 17 8 2 2 Laser exposure process eeeeeeee eene nnne nes nennen tni tn situs setas nicanenene 17 8 2 3 Laser emission TIMING aie irc rris n eta bern rk rci et rn ER Re geh 18 8 2 4 ANCA ERE 18 9 Cartridge Section eo eee psi erii a ia 19 9 1 19 9 2 20 93 OPERATION CU 20 9 3 1 Drum Cartridge DC life control i 20 9 3 2 Toner Cartridge TC life control 21 10 Photo Conductor section nennen 22 UE erui eae 22 Joc EESTI 22 magicolor 2480MF s 2 7 Q s 9 magicolor 2480MF IS o o s fe Theory of Operation Ver 1 0 Nov 2005 10 3 Op rali ni iio la 23 10 3 1 Photo Conductor drive mechanism en 23 10 8 2 Photo Conductor cleaning mechanism esee 23 11 Charge Corona SOOTIOri oriri tcn ee
2. 8 Write section PH section Theory of Operation Ver 1 0 Nov 2005 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 Print Control Board PWB P The Laser ON signal triggers the firing of each laser light which illuminates the SOS Board via the Polygon Mirror G1 Lens Return Mirror G2 Lens SOS Lens and SOS Mirror This generates an SOS signal This SOS Start of Scan signal unifies the timing at which the laser lights are irradiated for each main scan line 8 2 4 Laser emission area A Main scan direction The print start position in the CD direction is determined by the CD Print Start signal HSYNO that is output from the Image Processing Board IPB and the width of the paper The laser emission area is determined by the paper size The area of 4 mm on both edges of the paper is however the void image area B Sub scan direction The print start position in the FD direction is determined by the Image Write Start signal TOD that is output from the Image Processing Board IPB and the length of the paper The laser emission area is determined by the paper size The area of 4 mm on both the leading and trailing edges of the paper is however the void image area HSYNC Tm INIDEO INIDEO MOD Void width 4 mm Void width 4 mm E A Void width
3. 2 S Q lt a Direction of Rotation of the Toner Cartridge Rack Toner Cartridge Rack Standby Rack Positioning Position Sensor K Detection of C Developing Position x C H Detection of M Developing Position Detection of K Developing Position Detection of Y Developing Position 4139t02073e0 34 Theory of Operation Ver 1 0 Nov 2005 12 Developing section 2 Toner Cartridge Rack developing position To bring the Toner Cartridge Rack to a stop at the corresponding developing position the rack is rotated from the standby position 45 through pulse control of the Rack Motor 3 Cartridge replacement position When a request is made for replacing the Toner Cartridge of a specific color of toner by means of an input from the control panel upon a toner empty condition or through an input made via the printer driver the Toner Cartridge Rack is rotated 70 from the devel oping position through pulse control of the Rack Motor magicolor 2480MF s e S lt sj s N s 9 35 13 Image Transfer Section Theory of Operation Ver 1 0 Nov 2005 13 Image Transfer Section 13 1 Composition 13 1 1 1st transfer section magicolor 2480MF 4139t02019c0 4139T2C506AA s e S o Q fo
4. 4 1 3 Switchback Motor Control Rotation of the Reverse Motor M2 is controlled by the signal output from the DF Control Board DFCB Theory of Operation Ver 1 0 Nov 2005 4 Mechanical operations 4 2 Transport and duplex paper take up mechanism 4 2 1 Transport and duplex paper take up operation Drive for the Duplex Option is provided by the Transport Motor 1 Duplex Option Transport Roller 1 Transport Motor M1 Registration Roller Transport Roller 2 4057t02509c0 E s e nS lt sj s N 9 4 2 2 Duplex Option Transport Motor Control Rotation of the Transport Motor is controlled by the signals output from the DF Control Board 4 2 3 Duplex Option Loop Correction Control Aloop correction mechanism is provided to prevent skew from occurring in the second page The Registration Solenoid SD1 is energized after the lapse of a given period of time after the Paper Loop Sensor PS1 has been activated This drives the Registration Roller When the Registration Roller is driven the paper is conveyed into the machine Duplex Option I s 2 o E o fe Mechanical operations Theory of Operation Ver 1 0 Nov 2005 4 3 2 sided printing method The following two types of 2 sided printing methods are available 2 sided printing method r_ 2 sided printing wi
5. 38 Theory of Operation Ver 1 0 Nov 2005 13 Image Transfer Section A Cleaning Blade pressure retraction mechanism n color printing an image is formed on the Transfer Belt for each color of toner The Cleaning Blade is therefore provided with a pressure retraction mechanism In monochrome printing no retraction sequence is carried out The Cleaning Blade is normally in pressed contact with the Transfer Belt magicolor 2480MF 1 Pressure retraction operation The Cleaning Blade pressure retraction operations are performed by the Main Motor M1 Pressure Retraction Solenoid Cleaning Blade SD3 pressure cam lever and Retraction Position Sensor Cleaning Blade PS6 When the Pressure Retraction Solenoid Cleaning Blade SD3 is energized drive from the Main Motor M1 is transmitted to the pressure cam Pressure Retraction Solenoid Cleaning Blade 2 ej 7 Q 9 A 9 us zz Retraction Position Sensor s Cleaning Blade Belt Cleaner Assy 4139102075 0 39 magicolor 2480MF s 8 o I s 13 Image Transfer Section 2 Operation timing Theory of Operation Ver 1 0 Nov 2005 SL3 Energization Signal after Main Motor has been energized When power is turned ON Main Motor M1 Pressure Retraction Solenoid Cleaning Blad
6. IKONICA MINOLTA SERVICE MANUAL magicolor 2480MF 2005 11 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Ver 1 0 THEORY OF OPERATION TOTAL CONTENTS SAFETY AND IMPORTANT WARNING ITEMS S 1 IMPORTANT NOTICE ak a S 1 DESCRIPTION ITEMS FOR DANGER WARNING AND CAUTION S 1 SAFETY WARNINGS catino S 2 WARNING INDICATIONS ON THE MACHINE senem S 18 MEASURES TO TAKE IN CASE OF AN ACCIDENT nns S 20 Composition of the service manual sse eene C 1 Notation of the service manual ii 2 magicolor 2480MF Main Unit ni RA GA 1 Gomposition Operationi inci a inva led 9 Auto Document Feeder Unit On LL 1 Composition Operation 5 o Hid en RA 3 Lower Feeder Unit EE 1 eco tie b eee dete i e ete tren 3 Duplex Option Composition Operation 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 TECHNOLOGI
7. 24 Theory of Operation Ver 1 0 Nov 2005 11 Charge Corona section 11 2 Operation 11 2 1 Charge Corona Unit ON OFF control The grid voltage Vg applied to the Grid Mesh is controlled by image stabilization con trol Standby Position Belt Positioning K Toner Developing Position Sensor Activated Polygon Motor Energized Y M C Y Rack Motor M2 Developing Motor M3 Main Motor 1 Charge output bias 4139t02060e0 25 magicolor 2480MF 2 ej 7 Q 9 A s 9 12 Developing section Theory of Operation Ver 1 0 Nov 2005 12 Developing section 12 1 Composition magicolor 2480MF 4139T2C559AA 4139T2C504AA 2 S Q lt a fo Developing Motor M3 4139T2C514AA Photo Conductor Hopper Cleaning Blade Waste Toner AU Screw t 9 Supply Roller Developing Roller LAN Agitating Blade Regulator Blade 2nd Regulator Blade 1st 4139T2C515AA 4139T2C516AA 26 Theory of Operation Ver 1 0 Nov 2005 12 Developing section 12 2 Drive Main Motor M1 magicolor 2480MF Photo Conductor Developing Motor M3 Developing Roller 4139T2C517AA A Developing Roller drive The Developing Roller is driven b
8. Drum Cartridge magicolor 2480MF Photo Conductor 4139 2056 0 4139T2C505AA Charge Generating Layer S Q lt a 6 Charge Transport Layer Aluminum Base 4139102057 0 10 2 Drive Photo Conductor 4139t01058e0 22 Theory of Operation Ver 1 0 Nov 2005 10 Photo Conductor section 10 3 Operation 10 3 1 Photo Conductor drive mechanism The Photo Conductor is driven by the Main Motor 1 When the Main Motor M1 is energized it turns the drive gear which in turn rotates the Photo Conductor magicolor 2480MF 10 3 2 Photo Conductor cleaning mechanism The Cleaning Blade is pressed up against the surface of the Photo Conductor scraping residual toner off the surface The toner scraped off the surface of the Photo Conductor is collected in the Drum Car tridge O fe Cleaning Blade S s 2 S ej 7 Q 9 A 9 4139t02059e0 23 11 Charge Corona section Theory of Operation Ver 1 0 Nov 2005 11 Charge Corona section 11 1 Composition magicolor 2480MF Charge Corona 4139T2C505AA 4139T2C512AA Electrode Gila Mosh 2 w o Q e x I 2 E a E 5 4139T2C513AA
9. Face down Output Tray capacity 100 sheets Theory of Operation Ver 1 0 Nov 2005 2 Product specifications B Functions ns Average 70 seconds 100 V area 5 Warm up Time Average 75 seconds 200 240 V area amp at ambient temperature of 23 C 73 4 F and rated source voltage E Plain paper 126 78 mm second 5 System Speed Thick stock 63 39 mm second OHP film 42 26 mm second First Page Out Time Full Color 21 seconds Plain Paper Monochrome 12 seconds First Copy Time Full Color 52 seconds Plain Paper Normal Mode 23 seconds Monochrome Fine Mode 25 seconds Copy Print Speed Full Color 5 pages minute Plain Paper Monochrome 20 pages minute Paper width 92 to 216 mm 3 1 2 to 8 1 2 inch Paper length 148 to 356 mm 5 3 4 to 14 inch Plain Paper 60 to 90 g m 16 to 24 Ib Transparencies Thick stock 91 to 163 g m 25 to 40 Ib Postcards Envelopes Letterhead Label stock Glossy stock Custom Paper Sizes Media Types Plain paper and letterhead 200 sheets Transparencies thick stock postcards labels stock and glossy stock 50 sheets Envelopes 10 sheets Tray Capacities C Maintenance Machine Durability 200 000 prints or 5 years whichever comes first D Machine Specifications AC 110 to 127 V Voltage Power Requirements 9 AC 220 to 240 V Frequency 50 60 Hz 3 Hz Max Power Consumption 1100 W
10. 4057T2E508AA s 8 o e lt s E fe 12 IKONICA MINOLTA 2005 KONICA MINOLTA BUSINESS TECHNOLOGIES INC Printed in Japan DD4139CE1 XXXX Use of this manual should be strictly supervised to avoid disclosure of confidential information
11. 528 W x 475 D x 531 H mm 20 3 4 W x 18 3 4 D x 21 H inch Weight 32 kg 70 1 2 Ib During standby 39 dB A or less During printing 53 dB A or less Dimensions Operating Noise 2 I gt 2 D G E 2 Product specifications Theory of Operation Ver 1 0 Nov 2005 E Operating Environment 10 to 35 50 to 95 F with a fluctuation of 10 C 18 F or less per Temperature hour Humidity 15 to 85 with a fluctuation of 20 or less per hour 2 4 Built in Controllers CPU DC2040 108MHz Standard Memory 96 MB Interfaces USB2 0 compliant OS Compatibility Windows 98SE Me 2000 XP NOTE These specifications are subject to change without notice Theory of Operation Ver 1 0 Nov 2005 3 Center cross section 3 Center cross section 11 magicolor 2480MF E 4139T1C501AA 1 Fusing section 7 Toner Cartridge Section 2 Duplex Unit Section 8 Drum Cartridge Section 3 2nd Transfer Section 9 Transfer Belt Section 4 Lower Feeder Section 10 IR section 5 Paper Feed Section 11 Auto Document Feeder Section 6 Write Section Option 4 Paper path Theory of Operation Ver 1 0 Nov 2005 4
12. 4 Mechanical operations 4 34 Document Take up Mechanism 4 1 1 Document Take up Mechanism The Original Detection Sensor 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 Take up Roller turn to take up and feed the original properly The Pick up Roller transports the original up to the Take up Roller The Main Motor drives the Pick up Roller and Take up Roller through a gear train and the Paper Feed Clutch Auto Document Feeder Unit Main Motor M1 Pick up Roller Original Detection Sensor PS1 s 2 S lt 7 Q 9 A 9 Paper Feed Clutch CL1 Take up Roller Document Stopper 4556T2C501AA 4 Mechanical operations Theory of Operation Ver 1 0 Nov 2005 4 1 2 Document Separation Mechanism Double feeding of paper is prevented using coefficient of friction between the Take up Roller and Separator Pad Auto Document Feeder Unit Take up Roller Separator Pad 4556T2C502AA Single sheet feeding The coefficient of friction on the front side of the paper fed be
13. Plain paper letterhead 126 78 Thick stock postcards labels glossy stock 63 39 OHP film envelopes 42 26 51 15 Paper feed section Theory of Operation Ver 1 0 Nov 2005 15 3 3 Paper feed mechanism e When the Tray1 Paper Pick up Solenoid SL1 is energized drive from the Main Motor M1 is transmitted to the Pick up Roller via the Paper Pick up Clutch The Pick up Roller is thereby rotated Atthe same time the Lift Cam is rotated which raises the Paper Lift Plate This allows the paper to be taken up and fed in by the Pick up Roller magicolor 2480MF Lift Cam Paper Lift Plate Paper Lift Plate s e S o Q E fo o 4139t02101e0 1 4139t02089e0 52 Theory of Operation Ver 1 0 Nov 2005 15 Paper feed section 15 3 4 Double feed prevention mechanism The fixed Separation Pad system plus the Claw Stoppers are used for paper separation This ensures that only the first sheet of paper is taken up and fed in magicolor 2480MF Pick up Roller Eel e 4139102090 0 Claw Stoppers 15 3 5 Paper empty condition detection The Tray1 Paper Empty Sensor PS9 is located on the underside of Tray1 detecting the paper loaded in the tray When there is paper loaded in the tray the actuator drops into the tray unblocking the sensor light When paper runs out the
14. Write Unit Printer Control Board PRCB s e S o Q fo o Lower Feeder Unit Duplex Unit lt Paper Pick up A b transport Control System Line i 1 1 Power supply duum Image Bus Line Image process high voltage CPU Fusing 4139T2E543AA 10 Theory of Operation Ver 1 0 Nov 2005 7 Scanner Section IR Section 7 Scanner Section IR Section 7 1 Composition magicolor 2480MF 4139T2C560AA 4139T2C502AA Scanner Unit s 2 S fe 7 Q 9 A 3m 9 Scanner Motor IR Cooling Fan Motor 4139T2C565AA 11 7 Scanner Section IR Section Theory of Operation Ver 1 0 Nov 2005 7 2 Drive magicolor 2480MF 4139T2C566AA 2 S Q 6 12 Theory of Operation Ver 1 0 Nov 2005 7 Scanner Section IR Section 7 3 Operation 7 3 1 IR Unit Open Close Mechanism The machine is provided with the IR Unit open close mechanism to allow the Toner Car tridge Drum Cartridge and other disposables to be replaced with new ones Pulling the IR Unit Lock Release Lever will disengage the IR Unit Lock Pawl allowing the IR Unit to be opened The IR Unit Lock Release Lever is h
15. 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 F Machine specifications DC 24 V supplied from the main unit Power Requirements DC 5 V supplied from the main unit Max Power consump 30W tion scis 506 W x 350 1 D x 90 3 H mm 20 W x 13 3 4 D x 3 1 2 H inch Weight 3 kg 6 1 2 Ib G Operating Conforms to the operating environment of the main unit NOTE These specifications are subject to change without notice Theory of Operation Ver 1 0 Nov 2005 2 Composition Composition Operation 2 Composition Auto Document Feeder Unit 4556T2C506AA 4556T2C505AA DF Control Board DFCB s 2 S 7 Q 9 9 Pick up Roller Paper Feed Sensor PS2 Paper Leading Edge Detection Sensor PS3 4556T2C507AA Take up Roller 3 Drive Theory of Operation Ver 1 0 Nov 2005 3 Drive Auto Document Feeder Unit 4556T2C508AA I s 2 E lt I s fe Theory of Operation Ver 1 0 Nov 2005 4 Mechanical operations
16. 2 Paper Empty Detection nsn ia AS Wray SetDelectiongcu ettet e eee he m Composition Operation Theory of Operation Ver 1 0 Nov 2005 yun 1 M07 uo esado uonsodwog Blank Page Theory of Operation Ver 1 0 Nov 2005 1 Product specifications Outline 3 1 Product specifications 5 Name Add on 500 sheet paper feed cassette S Type Front loading type Installation Desk type Document Alignment Center B Paper type Paper Size A4 Letter Paper Type Plain 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 unit DC5V 5 Max Power 12W Consumption Dimensions 495 W x 581 D x 138 mm 19 1 2 W x 22 3 4 H x 5 1 2 D inch Weight 5 0 kg 11 Ib D Operating environment Temperature 10 to 35 C 50 to 95 F with a fluctuation of 10 C 18 F or less per hour Humidity 15 to 85 with a fluctuation of 20 h NOTE These specifications are subject to change without notice 1 Product specifications Theory of Operation Ver 1 0 Nov 2005 o o 3 a Blank Page Theory of Operation Ver 1 0 Nov 2005 Composition Operation 2 Composition 2 Composition 4056T2C501AA Tray Set Det
17. 4 mm 4 Y Void width 4 mm 4138102595 0 18 Theory of Operation Ver 1 0 Nov 2005 9 Cartridge section 9 Cartridge section 9 1 Composition Drum Cartridge magicolor 2480MF 4139t02053e0 Toner Cartridge 4139T2C504AA s 2 S fe 7 Q 9 A E 9 4139t02054e0 19 9 Cartridge section Theory of Operation Ver 1 0 Nov 2005 9 2 Drive Main Motor magicolor 2480MF Drum Cartridge Photo NE Toner Cartridge 4139t02055e0 9 3 Operation s 8 o lt s fe 9 3 1 Drum Cartridge DC life control The Drum Cartridge offers the following life controls detecting a new DC and resetting the life counter A New DC detection The machine attempts to perform a new DC detection sequence when the Power Switch is turned OFF and ON or the Front Door is closed If no new DC is detected the image stabilization sequence is not carried out Ifa DC is detected the image stabilization sequence is carried out B Reaching the life The life counter is reset when a new DC is detected The machine gives a warning screen when the life value is reached After a predeter mined number of printed pages are produced after the life value has been reached the machine displays a DC replacement
18. Operation 3 o The main unit carries out the first print cycle for the second sheet of paper to produce the print image of the fourth page of the original Atthe same time the first 1 sided print is transported through the Duplex Option Operation 4 The main unit produces the print image of the first page of the original on the first 1 sided print that has been fed through the Duplex Option Atthe same time the second sheet of paper is subjected to a switchback sequence at the exit section and fed into the Duplex Option Atthe same time the third sheet of paper is taken up and fed into the main unit 10 Theory of Operation Ver 1 0 Nov 2005 4 Mechanical operations Operation 5 While feeding the first 2 sided print out main unit produces the print image of the 6th page of the original on the third sheet of paper The second sheet of paper waits at the Duplex take up position until the third sheet of paper is subjected to a switchback sequence Duplex Option Operation 6 Immediately before the first 1 sided print leaves the Paper Exit Roller the direction of rotation of the Paper Exit Roller is reversed and the first 1 sided print for the third sheet is transported toward and into the Duplex Option Atthe same time the second sheet of paper is fed into the main unit again Oper
19. Paper path lt Machine Right Side View gt DE A p 9 o o 4139T1C502AA 4139T1C504AA Theory of Operation Ver 1 0 Nov 2005 5 Image creation process 5 Image creation process 1 CCD Photoelectric Conversion gt o A 9 o I E 2 Image Processing Board 11 Transfer Belt Cleaning 12 Fusing 7 1st Image Transfer ex DO S 6 Developing ASF 4 Photo conductor 9 Paper Separation 8 2nd Image Transfer 10 Photo Conductor Cleaning 5 Photo Conductor Charging 3 Laser Exposure 4139T1C503AA 2 A Q O G E 5 Image creation process Theory of Operation Ver 1 0 Nov 2005 Light reflected off the surface of the original is converted to corre CCD Photoelectric MAS Ae 1 sponding electric signal by CCD and the resultant electric signal is sent Conversion the Image Processing Board 2 Image Processing The intensity of the laser light is controlled
20. To prevent incorrect printed pages the size of the paper being conveyed is detected using the Registration Sensor PS1 The length of the paper 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 f the paper size specified by the controller does not match the paper size detected by the Registration Sensor PS1 the machine displays a corresponding message on the control panel The paper that has caused the size error is subject to the print processes Operations for the subsequent sheets of paper can be specified from the controller 56 Theory of Operation Ver 1 0 Nov 2005 17 Fusing section 17 Fusing section 17 1 Composition magicolor 2480MF 4139T2C567AA Fusing Motor M4 IN Cleaning Roller 2 4139 20510 Thermistor THT Exit Sensor PS7 5 Thermostat 3 Q E fe Heater Lamp Pressure Roller Heating Roller 4139T2C532AA 4139T2C531AA 57 17 Fusing section Theory of Operation Ver 1 0 Nov 2005 17 2 Drive Fusing Motor magicolor 2480MF Heating Roller 4139t02094e0 17 3 Operation s 8 o lt I s 17 3 1 Heating Roller drive control A Speed change control Drive for the Heating Roller is pr
21. based on the image signal Board transmitted to this board The surface of the Photo Conductor is irradiated with the laser light and 3 Laser Exposure an electrostatic latent image is thereby formed The image projected onto the surface of the Photo Conductor is con 4 Photo conductor verted to a corresponding electrostatic latent image 5 Photo Conductor A negative DC charge layer is formed on the surface of the Photo Con Charging ductor The toner negatively charged in the Hopper is attracted onto the elec trostatic latent image formed on the surface of the Photo Conductor It 6 Developing is thereby changed to a visible developed image ADC negative bias voltage is applied to the Developing Roller thereby preventing toner from sticking to the background image portion ADC positive voltage is applied to the backside of the Transfer Belt 7 1st Image Transfer thereby allowing the visible developed image on the surface of the Photo Conductor to be transferred onto the Transfer Belt ADC positive voltage is applied to the backside of the paper thereby 8 2nd Image Transfer allowing the visible developed image on the surface of the Transfer Belt to be transferred onto the paper 9 Paper Separation The paper which has undergone the 2nd image transfer process is neutralized 10 Photo Conductor The residual toner left on the surface of the Photo Conductor is Cleaning scraped off a A charge is app
22. c 65 18 Paperexitsection inieieeie gia 66 18 1 20 66 19 2 DIVO co cionis eH D fca inier d e Ee 67 18 3 Operation a EUR nein HI IE 67 18 3 1 Ext Tray Full Detection raihi retten rite 67 19 Image stabilization control xcci aaa 68 1911 OVEIVIEW 68 19 2 Opetatio reed e ecd ri En i et ia 69 19 2 1 Leak detection control 69 19 2 2 AIDC Sensor LED intensity control 19 2 3 Reflectance measurement control 69 19 2 4 Control of the maximum amount of toner 69 19 2 5 Laser intensity adjustment control 69 19 2 6 g cotrection COMO iunio rire een iii 69 19 3 Operation timing soiree teneret be 70 19 4 Operation percer irren te on due pippi 70 20 Oth r conttol iiie eode aaa 71 20 1 Fan Control coe eterne en teer nr me ede d re eite 71 20 1 4 Construction magicolor 2480MF s 2 7 Q s 9 Theory of Operation Ver 1 0 Nov 2005 20 1 2 Control nai ia 72 20 2 Temperature Humidity Sensor 73 20 21 GomliposSitiOon iine E aaa 73 magicolor 2480MF IS o lt s fe Theory of Operation Ver 1 0 Nov 2005 Outline
23. message 20 Theory of Operation Ver 1 0 Nov 2005 9 Cartridge section 9 3 2 Toner Cartridge TC life control A Toner Cartridge detection and new cartridge detection timing The machine attempts to perform a detection sequence when the Front Door is closed B Toner Cartridge detection The machine accesses the TC Detection Board CSIC to check for data stored in it Using that data the machine determines whether or not a Toner Cartridge is loaded magicolor 2480MF C New Toner Cartridge detection After a Toner Cartridge has been detected the machine determines whether it is new or not based on the data acquired D Toner Cartridge near empty and empty condition detection The amount of toner consumed is calculated from the number of dots produced for one printed page by the controller A toner near empty condition and a toner empty condition are thereby detected Toner near empty decision 1 The machine determines that there is a toner near empty condition when the image counter and dot counter reach the life value Toner empty decision 2 The machine determines that there is a toner empty condition when a predeter mined number of printed pages are produced after the toner near empty condition has been detected E s e S lt sj 6 9 21 10 Photo Conductor section Theory of Operation Ver 1 0 Nov 2005 10 Photo Conductor section 10 1 Composition
24. should not be opened under any circumstances Laser Aperture of the Print Head Unit 4139P0C500DA S 12 SAFETY AND IMPORTANT WARNING ITEMS the U S A Canada CDRH Regulation This machine is certified as a Class 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 to page S 16 indicates compliance with the CDRH regulations and must be attached to laser products marketed in the United States N CAUTION Use of controls adjustments or performance of procedures other than those spec ified in this manual may result in hazardous radiation exposure Semiconductor laser Maximum power of the laser diode 10 mW Wavelength 775 800 nm Areas N CAUTION Use of controls adjustments or performance of procedures other than those spec ified in this manual may result in hazardous radiation exposure Semiconductor laser Maximum power of the laser diode 10 mw Wavelength 775 800 nm Denmark N ADVARSEL Usynlig Laserstraling ved abning nar sikkerhedsafbrydere er ude af fun
25. time and contamination of the IDC Sensor IDC the intensity of the LED is adjusted for the surface of the Transfer Belt on which no toner sticks so that the output value of the IDC Sensor IDC becomes constant 19 2 3 Reflectance measurement control The reflectance of the Image Transfer Belt is measured using the IDC Sensor IDC One measurement is taken for one complete turn of the Image Transfer Belt The measured value is corrected during the laser intensity adjustment control and y cor rection control 19 2 4 Control of the maximum amount of toner sticking The developing bias setting value is adjusted to keep constant the amount of toner stick ing to the surface of the Photo Conductor with reference to the 10096 solid image s e a i 6 N 9 19 2 5 Laser intensity adjustment control Characteristics of the Photo Conductor developing and charging change as affected by changes with time and in environment The intensity of the laser light is adjusted so that fine lines and gradations of a predetermined level are reproduced at all times 19 2 6 y correction control A gradation pattern is produced on the surface of the Image Transfer Belt The IDC Sen sor IDC measures the density of the pattern and sends the measured result to the con troller for gradation adjustment 69 19 Image stabilization control Theory of Operation Ver 1 0 Nov 2005 19 3 Ope
26. train Auto Document Feeder Unit Main Motor M1 Paper Leading Edge Detection Sensor PS3 2 S Q lt E fo 6 Exit Roller 4556T2C504AA Theory of Operation Ver 1 0 Nov 2005 4 Mechanical operations 4 3 Miscellaneous 4 3 1 Document Feeder raised lowered position detection mechanism BE There is a magnet provided in the Document Feeder allowing the printer to detect the 8 E position of the Document Feeder whether the Document Feeder is raised or lowered Sa This magnet attracts the Original Cover Set Switch provided on the printer side thus acti 2 vating the sensor The printer will then detect the position of the Document Feeder Magnet E 2 w g 2 E a o 4139T2C561AA Original Cover Set Switch SW4 4 Mechanical operations Theory of Operation Ver 1 0 Nov 2005 Auto Document Feeder Unit s 8 E Q s fe Blank Page 10 KONICA MINOLTA SERVICE MANUAL THEORY OF OPERATION Lower Feeder Unit 2005 11 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
27. 1 System configuration Machine Front View CD 7 2 1 System configuration uL e A n 9 E o I E IR 1 magicolor 2480MF 3 Lower Feeder Unit 2 Duplex Option 4 Dust Cover Standard for U S A and Europe 4139T2E562AA 2 I gt 2 D G E 2 Product specifications Theory of Operation Ver 1 0 Nov 2005 2 Product specifications A Type Type Desktop Printing System Semiconductor laser and electrostatic image transfer to plain paper Exposure System 2 laser diodes and 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 Platen Stationary Original Scanning Scanning in main scanning direction with a CCD Registration Rear left edge Paper Feeding System Tray1 200 sheets Tray2 500 sheets Option Developing System Single element developing system Charging System DC comb electrode Scorotron system Image Transfer System Intermediate transfer belt system Paper Separating System Curvature separation Charge neutralizing system Fusing System Roller fusing Paper Exit System
28. 5 4 1 Document Take up Mechanism i 5 4 1 1 Document Take up Mechanism ii 5 E 4 1 2 Document Separation Mechanism in 6 E 4 2 Document Transport Exit MechaniSsm ii 7 4 2 1 Document transport mechanism iii 7 5 4 2 2 Document exit mechanism 8 El 43 MiscellariGolls ii ii e iaia aaa 9 5 4 3 1 Document Feeder raised lowered position detection mechanism 9 Theory of Operation Ver 1 0 Nov 2005 JepeeJ jueuinooq oiny uo esado uonsodwog Blank Page Theory of Operation Ver 1 0 Nov 2005 Outline 1 Product Specifications A Type 1 Product Specifications Name Automatic Document Feeder Installation Inserted at upper rear side of main unit Document Alignment Center Document Loading Face up B Functions Modes 1 Sided Mode C Paper type Type of Document 1 Sided mode Plain Paper 35 g m to 128 g m ABS B5S 45 LegalS LetterS Fori Document 140 to 216 Length 148 to 355 6 mm Capacity 50 sheets 80 g m or load height of 8 mm or less D Paper feed prohibited originals The following types of originals should not be used Types of Document Possible Malfunctions Original that is stapled or clipped Feed failure damage to the original or drive failure due to clip clogging Pasted originals Misfeed broken origina
29. A in the lower outside section of the correspond ing page A number within 4 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 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 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 2005 11 1 0 Issue of the first edition Date Service manual Ver Revision mark Descriptions of revision Theory of Operation Ver 1 0 Nov 2005 CONTENTS magicolor 2480MF Main Unit Outline 1 Systemiconfigurationi risaie aaa 1 2 Product specifiCalions s 2 21 iore c 4 3 Center Cross Section oc titre pe ariei dL ide ev epu SEL 5 4 Paper pathi 6 5 Image creation process 7 Composition Operation 6 9 61 Operation Sequence oie e nc RR OMM 9 6 2 Control block diagram 7 Scanner Section IR SEGtion ii 11 GA Composition sni cerner tf nei bir coste Hsc ig Deeds 11 72 12 7 3 Operation acie 13 7 3 1 IR Unit Open Close Mechanism i 13 7 3 2 Auto Document Feeder Unit
30. Developing Roller 4 Toner then sticks to the electrostatic latent image formed on the surface of the Photo Conductor That part of toner left on the surface of the Developing Roller is returned to the Toner Supply Portion Hopper Supply Roller Developing Roller Agitating Blade Regulator Blade 2nd Regulator Blade 1st 4139102061 0 28 Theory of Operation Ver 1 0 Nov 2005 12 Developing section 12 2 3 Developing bias The developing bias voltage Vb is applied to the Developing Roller so that an adequate amount of toner is attracted onto the surface of the Photo Conductor To allow toner to fly to the Photo Conductor easily DC AC developing bias voltage Vb is applied to the Developing Roller during development This 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 The developing bias voltage Vb is supplied by the High Voltage Unit HV magicolor 2480MF Developing Bias Contact Point Seal Bias Contact Point Regulator Blade Contact Points 413910206280 s 2 S 7 Q 9 9 12 2 4 Developing system The machine employs the single component non contact developing system n the non contact single component developing system the magnetic brush does not rub the su
31. ES INC hereafter called the KMBT strongly 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 DANGER WARNING and A 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 N DANGER Action having a high possibility of suffering death or serious injur A WARNING Action having a possibility of suffering death or serious injury A CAUTION Action having a possibility of suffering a slight wound medi
32. F Lock Lever is rotated through coupling of gears This causes the Auto Document Feeder Unit to be secured to the IR Unit magicolor 2480MF ADF Lock Lever IR Unit Lock Release Lever sugo N ADF Lock Lever is engaged ADF in locked condition 4139T2C549AA 7 3 3 Original Size Detection s 2 S fe 7 Q SI s E 9 Since the Scanner is not mounted with any Original Size Detection Sensors the scan ning range of the Scanner is determined according to the paper size setting made on the control panel If the correct paper size is not selected on the control panel or the paper of the correct size is not loaded in the tray the machine gives an error message on the control panel after the print cycle 15 magicolor 2480MF 5 2 a 5 5 4 fo a E e 6 8 Write section PH section Theory of Operation Ver 1 0 Nov 2005 8 Write section PH section 8 1 Composition f mr 4139102002 0 Semiconductor Laser 4139T2C503AA G2 Lens SOS Sensor SOS Mirror X 2 G2 Lens SOS Lens SEA G Lens Return Mirror Polygon Mirror 4139T2C511AA 16 Theory of Operation Ver 1 0 Nov 2005 8 Write section PH section 8 2 Operation 8 2 1 Outline The surface of the Photo Conductor is irradiated with a laser light an
33. High Temperature Helfa Oberflicha Temp rature lev s Temperatura aita Alta temperatura Alta tamporatura 4139POE504DA S 18 SAFETY AND IMPORTANT WARNING ITEMS 4139P0E505DA A CAUTION You may be burned or injured if you touch any area that you are advised not to touch by any caution label Do not remove caution labels If any caution label has come off or soiled and therefore the caution cannot be read contact our Service Office 5 19 MEAS URES TO TAKE IN CASE OF AN ACCIDENT MEASURES TO TAKE IN CASE OF AN ACCIDENT 1 5 20 If an accident has occurred the distributor who has been notified first must immediately take emergency measures to provide relief to affected persons and to prevent further damage If a report 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 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 For reports and measures concerning serious accidents follow the regulations speci fied by every distributor 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
34. NT WARNING ITEMS 4 2 Laser Safety Label A laser safety labels is attached to the outside 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 4139P0E501DA S 15 SAFETY AND IMPORTANT WARNING ITEMS 4 3 Laser Caution Label A laser caution label is attached to the inside of the machine as shown below 4139P0E503DA SAFETY AND IMPORTANT WARNING ITEMS 4 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 copier OFF f the job requires that the copier be left ON take off your watch and ring and wear laser protective goggles Ahighly 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 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 ZNCAUTION A VOASICHT ATTENTION A PRECAUCION A CUIDADO ATTENZIONE
35. Rotated Y Development Rack is Rotated Step 5 Step 6 Step 7 Step 8 s 2 S 7 Q 9 9 Rack is Rotated C Development M Development Rack is Rotated Standby Position K Development 4139t02071e0 33 12 Developing section Theory of Operation Ver 1 0 Nov 2005 E Toner Cartridge Rack stop position detection The Toner Cartridge Rack stop position for each color of toner is detected by the Rack Motor M2 and the Rack Positioning Sensor PS3 The Toner Cartridge Rack is provided with slits each for a specific color of toner When the rack rotates the Rack Positioning Sensor PS3 is blocked and unblocked A specific stop position is detected when the Rack Positioning Sensor PS3 is blocked and unblocked magicolor 2480MF Rack Positioning Sensor 4139t02072e0 4139t01583c0 1 Toner Cartridge Rack standby position The standby position is 45 before the developing position of the Toner Cartridge The Y Toner Cartridge is therefore provided with a slit for detecting the K developing position When the Toner Cartridge Rack is rotated the Rack Positioning Sensor PS3 moves past the slit for detecting the K developing position This allows the machine to determine that the current development is for K Through pulse control of the Rack Motor the machine then successfully brings the Toner Cartridge Rack to its standby position
36. 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 lt Theory of Operation section gt 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 lt Field service section gt GENERAL 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
37. a scho snas 4 1 Switchback mechanism 4 1 1 Switchback Operation imriss anarias a ETERA 5 E 4 1 2 Paper exit roller drive coupling mechanism esee 6 E 4 1 3 Switchback Motor Control siisii aaa ar 6 4 2 Transport and duplex paper take up 7 E 4 2 1 Transport and duplex paper take up operation 7 El 4 2 2 Duplex Option Transport Motor Control 5 4 2 3 Duplex Option Loop Correction Control ii 43 2 sid d printing method nari nia ras itae ieri Pn 8 4 3 1 Operations in 2 sided printing with a single sheet of paper resident in the system eeeeeeeeeeeeeeeeen enne enne 8 4 3 2 Operations in 2 sided printing with two sheets of paper resident in the sySstem i 10 Theory of Operation Ver 1 0 Nov 2005 Duplex Option IS o o fe Blank Page Theory of Operation Ver 1 0 Nov 2005 1 Product specifications Outline 1 Productspecifications A Type Name Duplex Option Type Switchback and Circulating Duplex Unit Installation Mounted on the right side door of main unit Reversing System Exit Roller switchback Conveyance system Rubber roller driven rolls Document Alignment Center B Paper type Paper Size A4 Le
38. actuator is raised blocking the sensor light 2 7 Q 9 Actuator 4139102091 0 15 3 6 Paper feed retry function To reduce the number of paper misfeeds detected due to failure to take up and feed in paper properly another paper feed sequence is carried out if the Registration Sensor PS1 is not unblocked and blocked within a predetermined period of time 53 magicolor 2480MF 2 S o Q a fo 16 Conveyance Section Registration Roller Theory of Operation Ver 1 0 Nov 2005 16 Conveyance Section Registration Roller 16 1 Composition roller 4139T2C509AA Conveyance roller Registration roller Sensor PS2 4139T2C528AA Main Motor M1 Registration Roller Solenoid SD2 4139T2C529AA 54 Theory of Operation Ver 1 0 Nov 2005 16 Conveyance Section Registration Roller 16 2 Drive magicolor 2480MF Registration Sensor PS1 I DER CANN Go 1 4139T2C530AA 16 3 1 Registration Roller control 16 3 Operation The Registration Sensor PS1 detects whether or not the paper has reached the Con veyance Section Conveyance of paper is restarted by synchronizing the paper conveyed with the image Since the Conveyance Roller and Registration Roller are synchronized with each other no loop i
39. ade is returned Then the Cleaning Blade is pressed against the Transfer Belt magicolor 2480MF Pressure Cam Lever 4139t02078e0 5 Home position detection The position of the Cleaning Blade is unknown when the Power Switch is turned ON or the cover is opened and closed the machine performs a home position detection sequence during a warm up cycle During the warm up cycle the Pressure Retraction Solenoid Cleaning Blade SD3 is energized to start a pressure retraction sequence When the Retraction Position Sensor Cleaning Blade PS6 is then blocked the Pressure Retraction Solenoid Cleaning Blade SD3 is deenergized E s e nS 6 9 41 13 Image Transfer Section Theory of Operation Ver 1 0 Nov 2005 13 3 2 1st Transfer Roller voltage ON OFF control Image write start position for Image write v n a paper size greater than A4 Pa s Paper size ob smalich magicolor 2480MF Belt Positioning Sensor PC4 EE KI ELE TOD Image Write Start signal E E E Rack Motor M2 1st Transfer output 4139t02103e0 13 3 3 2nd Transfer Roller pressure retraction mechanism n color printing the toner image of each color of toner is transferred to the Transfer Belt thus a total of four times to cover the four colors of toner Pressure retraction control with respect to the Transfer Belt is therefore provided f
40. ate The Toner Cartridge Rack is located at this standby position when the machine completes a warm up cycle or waits for a print com mand The development position refers to the position at which the Toner Cartridge Rack stops during development of a specific color of toner The cartridge replacement position refers to the position at which the Toner Cartridge Rack is stopped for replacement of the Toner Cartridge of a specific color of toner magicolor 2480MF 1 Standby reference position The standby position is 45 before the developing position of the K Toner Cartridge Standby Position s 2 S ej 7 Q 9 A 9 4139102067 0 2 Developing position The developing position is where the Toner Cartridge Rack is rotated 45 from the standby position For Developing of K Photo Conductor Developing Position 4139t02068e0 31 12 Developing section Theory of Operation Ver 1 0 Nov 2005 3 Cartridge replacement position The cartridge replacement position is where the Toner Cartridge Rack is rotated 70 from the developing position For Developing of K EY K Developing Position Cartridge Replacement Position magicolor 2480MF 4139t02069e0 C Monochrome printing process 1 Operation sequence 1 The Toner Cartridge Rack is stationary at the standby position When a print request is receive
41. ation 7 The main unit carries out the first print cycle for the second sheet of paper to produce the print image of the third page of the original Atthe same time the first 1 sided print for the third is transported through the Duplex Option Atthe same time the forth sheet of paper is taken up and 6 fed into the main unit t s e S lt sj s N 9 Operation 8 While feeding the second 2 sided print out main unit pro duces the print image of the 8th page of the original on the fourth sheet of paper The third sheet of paper waits at the Duplex take up posi tion until the fourth sheet of paper is subjected to a switch 8 back sequence 6 Steps 6 through 8 are repeated 11 4 Mechanical operations Theory of Operation Ver 1 0 Nov 2005 2 sided printing of two A4 originals with two sheets of paper resident in the sys tem Duplex Option Belt Positioning Sensor PS4 Registration Sensor PS1 E z a a Exit Sensor PS7 Foward Backward Forward Backward Forward Backward Forward Backward Forward Duplex Reverse Motor Rotation Rotation Rotation Rotation Rotation Rotation Rotation Rotation Rotation 3 EE SI GSO M2 Duolex Transport Motor M1 Duplex Registration Solenoid SD1 Duplex Paper Loop Sensor PS1
42. ation Requirements Prohibited Installation Places NWARNING Do not place the product near flammable materials or vola tile materials that may catch fire N A risk of fire exists Do not place the product in a place exposed to water such as rain Q m A risk of fire and electric shock exists Nd 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 cord Dust collected around the power plug and outlet may cause fire SAFETY AND IMPORTANT WARNING ITEMS Ventilation N CAUTION 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 N CAUTION Before conducting an inspection read all relevant docu mentation service manual technical notices etc and proceed with the inspection following the prescribed pro cedure using only the prescribed tools Do not make any adju
43. d an electrostatic latent image is thereby formed The Polygon Mirror has four faces The machine uses a two beam array LD to inhibit the speed of the Polygon Mirror from increasing because of the decreased number of faces the Polygon Mirror has as compared with the conventional models The two beam array LD consists of two LD elements arranged vertically Two lines are scanned with two laser beams emitted from these two LD elements through a single face of the Polygon Mirror magicolor 2480MF Photo Conductor Surface Beam 77 Beam B scan motion Two lines are scanned in a single Beam A BeamB Direction of Rotation of Photo Conductor 1 G2 Lens 2 S 7 Q 9 9 1 Direction of Rotation of Photo Conductor Laser Diode di G1 Lens Polygon Mirror Return Mirror 4139102051 0 8 2 2 Laser exposure process 1 The laser light emitted from the Semiconductor Laser strikes the Polygon Mirror 2 The Polygon Mirror with four faces is rotated at high speeds by the Polygon Motor 3 The SOS Sensor ensures that the laser light emission start timing remains con stant for each line of main scan Photo Conductor Semiconductor Laser SOS Board Polygon Motor 4139102052 0 17 magicolor 2480MF I 2 o o
44. d from the controller the Toner Cartridge Rack is rotated to bring the K Toner Cartridge to its developing position Development of monochrome printing is started 4 When the development is completed the Toner Cartridge Rack is rotated and brought to a stop at the standby position e s e E o I s fe Step 1 Step 2 Step 3 Step 4 Co f ar ne LY PROS Standby Position Rack is Rotated Monochrome Printing Standby Position 4139t02070e0 32 Theory of Operation Ver 1 0 Nov 2005 12 Developing section D Color printing process 1 Operation sequence 1 The Toner Cartridge Rack is stationary at the standby position 2 2 When a print request is received from the controller the Toner Cartridge Rack is 5 rotated to bring the Y Toner Cartridge to its developing position g 3 Development of Y is carried out 9 4 When development of Y is completed the Toner Cartridge Rack is rotated to bring E the M Toner Cartridge to its developing position 5 Development of M is carried out 6 Similarly the Toner Cartridge Rack is rotated and development of C is carried out 7 Similarly the Toner Cartridge Rack is rotated and development of K is carried out 8 When the development of K is completed the Toner Cartridge Rack is rotated and brought to a stop at the standby position Step 1 Step 2 Step 3 Step 4 PAD Standby Position Rack is
45. e SL3 Retraction Position Sensor Cleaning Blade PC6 pressed position Y TOD CD Print Start signal for yellow K print completed During print cycle Main Motor M1 Pressure Retraction Solenoid Cleaning Blade SL3 Retraction Position Sensor Cleaning Blade PC6 To retracted position To pressed position 4139t02076e0 3 Retraction sequence Drive from the Main Motor M1 is transmitted to the drive gear Rotation of the drive gear is transmitted to the pressure cam When the Pressure Retraction Solenoid Cleaning Blade SD3 is energized the half moon shaped pressure cam rotates a half turn to push the lever forward When the lever is pushed forward the Cleaning Blade is retracted When the Cleaning Blade is retracted it results in the Cleaning Blade being retracted from the Transfer Belt During this time the Retraction Position Sensor Cleaning Blade PS6 detects whether or not the Cleaning Blade is retracted from the Transfer Belt Q Lever Pressure Cam ST 4139102077 0 40 Theory of Operation Ver 1 0 Nov 2005 13 Image Transfer Section 4 Pressure sequence 1 When the Pressure Retraction Solenoid Cleaning Blade SD3 is energized in the condition in which the Cleaning Blade is retracted from the Transfer Belt the pres sure cam rotates a half turn This pushes the lever backward 2 When the lever is pushed backward the Cleaning Bl
46. ecting Switch SW1 Paper Pick up Solenoid SD1 4056T2C509AA PF Drive Board PFDB Paper Empty Sensor PS1 4056T2C502AA Lower Feeder Unit 2 S 7 Q s 3m 9 Theory of Operation Ver 1 0 Nov 2005 3 Drive Drive 3 4056T2C510AA pun Jepee Jewo uoneJedo uonisoduo Theory of Operation Ver 1 0 Nov 2005 4 Mechanical operation 4 Mechanical operation 4 1 Conveyance Drive Mechanism The Lower Feeder Unit is not provided with any drive motor The driving force for paper feeding and conveyance drive from M1 is transmitted through a coupling gear from the printer The paper separation mechanism uses separation claws installed in the unit and elastic ity of the paper It ensures that only one sheet of paper is fed in at time The Paper Pick up Solenoid SD1 is controlled from the printer side through the PF Drive Board PFDB mounted in the Lower Feeder Unit Lower Feeder Unit Coupling gear PF Drive Board PFDB s 2 S fe 7 Q s E 9 Paper Empty Sensor S1 Paper Pick up Solenoid SD1 4056T2E506AA 4 Mechanical operation Theory of Operation Ver 1 0 Nov 2005 4 2 Paper Empty Detection The Paper Empty Sensor PS1 of the PF Drive Board PFDB detects a paper empty condition in the Lower Feeder Unit When there is paper l
47. ensor PS3 lk N ne AD Drive Board ADDB Paper Loop Sensor PS1 desee e a Registration Roller 4057T2C503AA 3 Drive Theory of Operation Ver 1 0 Nov 2005 3 Drive Reverse Motor M2 Duplex Option Transport Roller 1 Registration Roller Xx Transport Roller 2 4057T2C504AA s e lt I s Theory of Operation Ver 1 0 Nov 2005 4 Mechanical operations 4 Mechanical operations 4 1 Switchback mechanism 4 1 1 Switchback operation Duplex Option The Paper Exit Roller of the main unit is used to subject the 1 sided print to a switchback sequence so that the 1 sided print is to be transported through the Duplex Option Feeding the Paper into Duplex Option Paper Exit Roller E s e nS lt sj 6 9 4057t02507c0 Duplex Option s e Q lt I s 4 Mechanical operations Theory of Operation Ver 1 0 Nov 2005 4 1 2 Paper exit roller drive coupling mechanism e When the Duplex Option is mounted the gear assy of the Fusing Unit is raised by the leading edge of the Duplex Option lever thereby disconnecting drive from the machine Fusing Roller The Paper Exit Roller is driven by the Duplex Reverse Motor Reverse Motor M2 Fusing Unit Gear Assy 4057t02508c0
48. erature setting changed to 185 C 5 min After the lapse of the 5 min period the tem perature stabilizes at 180 C BI 4 During a print cycle Heating Roller temperature setting 169 C b If the Temperature Humidity Sensor TEM HUMS detects a temperature of less than 20 C temperature control is performed with the Heating Roller temperature setting changed to 174 C In standby state Heating Roller temperature setting 180 C Theory of Operation Ver 1 0 Nov 2005 17 Fusing section Temperature control during color printing Plain paper Power Switch ON Fusing Ready Temperature 1 2 189 4 7 74 H 184 185 Copy Print Start 180 167 100 60 Approx 45 sec Warm up completed approx 70 seconds for 100 V area approx 75 seconds for 200 V area 4139T2E564AA 1 During warm up cycle Heat the Heating Roller temperature to 178 C in average 45 seconds 100 V 120 V area Heat the Heating Roller temperature to 178 C in average 49 seconds 220 V 240 V area 2 In standby state Heating Roller temperature setting 180 C a If the Heating Roller temperature is 60 C or less when the warm up cycle is started temperature control is performed with the Heating Roller temperature setting changed to 185 C 5 min After the lapse of the 5 min period the tem perature
49. etected When light of the LED on the Waste Toner Near Full Detect Board led WTDTB LED is unblocked after the Drum Cartridge has been replaced the waste toner full condition is reset 49 15 Paper feed section Theory of Operation Ver 1 0 Nov 2005 15 Paper feed section 15 1 Composition magicolor 2480MF Lower Feeder Unit d 4139T2C525AA 4139T2C508AA 2 S o Q fo Tray1 Paper Empty Sensor eat PS9 4139T2C551AA 50 Theory of Operation Ver 1 0 Nov 2005 15 Paper feed section 15 2 Drive Main Motor M1 magicolor 2480MF Pick up Roller Tray1 Paper Pick up Solenoid SL1 4139T2C527AA 15 3 Operation 2 ej 7 Q A s 9 15 3 1 Paper feed control Print Start Signal Main Motor M1 Belt Positioning Sensor PC4 Tray1 Paper Pick up Solenoid SL1 Registration Roller Solenoid SL2 Registration Sensor PC1 Exit Sensor PC7 C TOD Top of Data CD Print Start signal for cyan 419910208890 15 3 2 Paper feed speed control The Conveyance Roller and Registration Roller are driven by the Main Motor M1 The appropriate paper feed and conveyance speed are selected according to the type of paper Media Type Main Motor mm sec
50. five printed pages have been produced Heating Roller Ordinar Temperature Temperature Media Type temperature at ZR humidity Sensor humidity Sensor yp the start of less than 20 C 28 C or more warm up cycle Plain paper 60 C or less 189 194 189 plain paper letterhead More than 60 C 184 194 184 Plain paper plain paper letter 60 C or less 189 194 189 head 257 mm or less More than 60 C 184 194 184 Thick stock 184 thick stock postcards labels OHP 179 Envelopes 194 Glossy stock 190 190 185 a The temperature is controlled at 159 C if the machine interior temperature is 20 C or more and humidity is 40 or higher D Energy Saver mode Heater control is suspended when a malfunction or paper misfeed occurs or in the Energy Saver mode 1 Control start timing The door is opened or a malfunction or paper misfeed occurs Arequest for Energy Saver mode is granted 2 Control termination timing All of the following events are canceled door open an error or malfunction that has occurred and Energy Saver mode 63 magicolor 2480MF E s e S Di e lt sj s N 9 magicolor 2480MF I 2 o E o s E fe 17 Fusing section Theory of Operation Ver 1 0 Nov 2005 17 3 3 Protection against abnormally high temperature T
51. for the second sheet of paper to produce the print image of the fourth page of the 7 original Steps 2 through 5 are repeated Two A4 originals with a single sheet of paper resident in the system Belt Positioning Sensor PS4 I Registration Sensor PS1 Exit Sensor PS7 Forward Backward Forward Rotation Rotation Rotation 1 Duplex Reverse Motor M2 Duolex Transport Motor Y 1 Bi Duplex Registration Solenoid I O SD1 Duplex Paper Loop Sensor ci 4057T2E507AA Duplex Option s 2 S fel 7 Q SI s E 9 4 Mechanical operations Theory of Operation Ver 1 0 Nov 2005 4 3 2 Operations in 2 sided printing with two sheets of paper resident in the sys tem Operation 1 Paper Exit Roller The first sheet of paper is taken up and fed in from the main unit drawer and the main unit starts the first print cycle to produce the print image of the second page of the original 2 Duplex Option Operation 2 Immediately before the first 1 sided print leaves the Paper Exit Roller the direction of rotation of the Paper Exit Roller 2 is reversed and the first 1 sided print is transported toward and into the Duplex Option tht Atthe same time the second sheet of paper is taken up CO and fed into the main unit t E
52. he machine provides protection at three different stages to prevent abnormally high temperature of the Fusing Unit A Soft protection Ifthe Thermistor TH1 detects a temperature exceeding a predetermined value the mal function code representing abnormally high temperature is displayed At this time the Heater Lamp H1 is turned OFF forcibly and the initiation of any new print cycle is pro hibited abnormally high temperature detection control B Hard protection f the CPU overruns and the output level of the CPU of the Mechanical Control Board becomes a HIGH or LOW level and not a pulse output and a predetermined tempera ture or higher is detected a circuit within the Mechanical Control Board turns OFF the relay to shut down the power supply to the Heater Lamp H1 C Thermostat protection f neither the soft protection nor hard protection can detect an abnormally high tempera ture due to a defective Thermistor TH1 or other reason the Thermostat TS1 operates atthe specified temperature This shuts down the power supply to the Heater Lamp H1 thus forcibly turning it OFF Heater Lamp Thermistor Thermostat iu Mechanical Control Board i Laser Safety Switch 9 ol Triac Circuit 6 6 s Power Switch CPU e AID K Heating Roller GND Hard Protection Fusing Pres
53. herefore 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 show to the left of the revised section A number within represents the number of times the revision has been made To indicate clearly a section revised show A in the lower outside section of the correspond ing page A number within 4 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 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 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 2005 11 1 0 Issue of the first edition Date Service manual Ver Revision mark Descriptions of revision Theory of Operation Ver 1 0 Nov 2005 CONTENTS Auto Document Feeder Unit 2E EL 9 Ap 5 lt Outline 1 Product Specifications iaia ss na 1 Composition Operation 2 COMPOSITION T 3 3 P 4 4 Mechanical Operations 2 rnit entren ni Echo tuas
54. id _ 2nd Image Transfer D Pressure Slider V P Pressure Retraction Qn Clutch ig s 2 S 7 Q 9 9 2nd Image Transfer 413910208060 2 Retraction sequence 1 When the Pressure Retraction Solenoid 2nd Image Transfer SD4 is energized in the condition in which the 2nd Transfer Roller is pressed against the Transfer Belt the Pressure Retraction Clutch rotates a half turn This moves the Pressure Slider 2 When the Pressure Slider is moved the 2nd Transfer Assy which has been pushed up by the ribs on the Pressure Slider lowers 3 When the 2nd Transfer Assy lowers it allows the 2nd Transfer Roller to be retracted from the Transfer Belt 2nd Transfer Assy Pressure Retraction Solenoid Pressure Retraction Roller 2nd Image Transfer Pressure Slider lt M ressure Retraction 1 pg cm T Ribs 2nd Transfer Roller 4139102081 0 43 13 Image Transfer Section Theory of Operation Ver 1 0 Nov 2005 13 3 4 2nd Transfer Roller cleaning DC positive and negative transfer bias voltages are alternately applied to the 2nd Trans fer Roller This allows toner residue on the surface of the 2nd Transfer Roller to be trans ferred back to the Transfer Belt thus cleaning the 2nd Transfer Roller The toner transferred back to the Transfer Belt is collected by the Cleaning Blade magicolor 2480MF 2nd Transfe
55. isabling fuse functions or bridging fuse terminals with wire metal clips solder or similar object Disabling relay functions such as wedging media between relay contacts Disabling safety functions interlocks safety circuits etc Safety will not be assured leading to a risk of fire and injury Making any modification to the product unless instructed by KMBT 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
56. ively makes for the difference between the fusing speed and paper conveyance speed during image transfer Fusing Paper Loop Sensor PS8 4139t01592c0 4139t01593c0 59 magicolor 2480MF s 2 S 7 Q 9 9 magicolor 2480MF 2 S o Q E fo 6 17 Fusing section 17 3 2 Fusing temperature control Theory of Operation Ver 1 0 Nov 2005 A thermistor is used to detect the surface temperature of the Heating Roller The Heater Lamp H1 is then turned ON and OFF as necessary to achieve the set temperature Temperature control during monochrome printing Plain paper Power Switch ON Fusing Ready 1 2 Copy Print Start 100 60 Approx 45 sec Warm up completed approx 70 seconds for 100 V area approx 75 seconds for 200 V area 4139T2E563AA 60 1 2 During warm up Heat the Heating Roller temperature to 178 C in average 45 seconds 100 V 120 V area Heat the Heating Roller temperature to 178 C in average 49 seconds 220 V 240 V area In standby state Heating Roller temperature setting 180 C a If the Heating Roller temperature is 60 C or less when the warm up cycle is started temperature control is performed with the Heating Roller temp
57. k of fire exists Check the interlock 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 media 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 o 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 special attention to forgotten connectors pinched cables aD L EMI forgotten screws etc gt i 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 CAUTION Unplug the po
58. ktion Undg udseettelse for str ling Klasse 1 laser produkt der opfylder IEC60825 sik kerheds kravene Halvlederlaser Laserdiodens hojeste styrke 10 mW Bolgelaengden 775 800 nm 5 13 SAFETY AND IMPORTANT WARNING ITEMS Finland Sweden A VARO Avattaessa suojalukitus ohitettaessa olet alttiina nakymattomalle lasersateilylle Al katso s teeseen LOUKAN 1 LASERLAITE KLASS 1 LASER APPARAT A VAROITUS Laitteen K ytt minen muulla kuin t ss kaytt6ohjeessa mainitulla tavalla saattaa altistaa k ytt j n turvallisuusluokan 1 ylitt v lle n kym tt m lle lasers teilylle Puolijohdelaser Laserdiodin suurin teho 10 mW Aallonpituus 775 800 nm VARNING Om apparaten anv nds p annat s tt n i denna bruksanvisning specificerats kan anv ndaren uts ttas f r osynlig laserstr lning som verskrider gr nsen f r laser klass 1 Halvledarlaser Den maximala effekten f r laserdioden 10 mW Vaglangden 775 800 nm N VARNING Osynlig laserstralning nar denna del ar ppnad och sparren ar urkopplad Betrakta ej stralen Norway N ADVERSEL Dersom apparatet brukes p annen mate enn spesifisert i denne bruksanvisning kan brukeren utsettes for unsynlig laserstr ling som overskrider grensen for laser klass 1 Halvleder laser Maksimal effekt till laserdiode 10 mw Balgelengde 775 800 nm SAFETY AND IMPORTA
59. l or folded paste up edges Book original Feed failure damage to the original or drive failure Original weighing less than 35g m or 129g m or more Feed failure 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 original Feed failure damage to the original or drive 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 em o a o 2 lt Feeder Unit ES E 2 5 lt Feeder Unit 1 Product Specifications E Paper feed not guaranteed originals Theory of Operation Ver 1 0 Nov 2005 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
60. lied to the Transfer Belt By potential difference resid 1 Transfer Belt Cleaning ual toner on the surface of the Transfer Belt is collected for cleaning Toner is permanently fused the paper by the combination of heat and 12 Fusing j pressure applied by the Fusing Roller Theory of Operation Ver 1 0 Nov 2005 6 Overall composition Composition Operation 6 Overall composition 6 1 Operation sequence magicolor 2480MF Print Request Fusing Motor M7 Main Motor M1 Polygon Motor Charge output 1st transfer output 2nd transfer output 2nd Transfer Roller retracted Pressure Retraction Solenoid Cleaning Blade SL3 2 S 7 Q s 9 Developing Motor M3 gt Rack Motor 2 1 Tray1 Paper Pick up Solenoid SL1 Registration Roller Solenoid SL2 t Registration Sensor PC1 Exit Sensor PC7 C TOD 4139t02049e0 6 Overall composition Theory of Operation Ver 1 0 Nov 2005 6 2 Control block diagram gt N CCD Unit 8 Scanner Motor lt gt IR Various IR sensors gt gt I Image Processing Board IPB Image processing IR Cooling Fan Motor 1 IR Unit open close sensor DC power supply2 li li 1
61. m cei ce te 24 ue EEeueisr 24 11 2 Operation 11 2 1 Charge Corona Unit ON OFF control een 25 12 Developirg sectioni ii naci oett rr C rb E cech Un IR E EE EA ERR 26 12 1 Composition 26 12 2 27 12 2 4 Developing drive control eeseeeeeeeeeeeeene nennen nennen nnne 28 12 2 2 Toner NOW sc 28 12 2 3 Developing bias 29 12 2 4 Developing system 29 12 2 5 Toner Cartridge Rack 30 13 Image Transfer Section ii 36 13 1 Gomposition a ia IAA cala 36 3tsttransfer Section cinis anice tr lea n ina 36 13 1 2 2nd transfer section ii nent rennen 37 13 2 38 19 8 Operater ned e Ee de red ne iid e teh 38 18 3 1 Transfer Belt cleaning mechanism 98 13 3 2 1st Transfer Roller voltage ON OFF control 42 13 3 3 2nd Transfer Roller pressure retraction mechanism 42 13 3 4 2nd Transfer Roller cleaning 44 13 3 5 Neutralization and separation 45 13 3 6 Belt Positioning Sensori 45 13 3 7 Auto Transfer Voltage CONtrol eee 46 14 Tonercollectinig Section eer da 47 ddl iran 47 14 2 D
62. manual A Product name In this manual each of the products is described as follows 1 IC board 2 magicolor 2480MF 3 Microsoft Windows 95 Microsoft Windows 98 Microsoft Windows Me Microsoft Windows NT 4 0 Microsoft Windows 2000 Microsoft Windows XP Standard printer Main body Windows 95 Windows 98 Windows Me Windows NT 4 0 or Windows NT Windows 2000 Windows XP When the description is made in combination of the OS s mentioned above B Brand name The company names and product names mentioned in this manual are the brand name or the registered trademark of each company Windows 95 98 Me Windows NT 4 0 2000 Windows NT 2000 XP Windows 95 98 Me NT 2000 XP IKONICA MINOLTA SERVICE MANUAL magicolor 2480MF Main Unit 2005 11 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 show to the left of the revised section A number within represents the number of times the revision has been made To indicate clearly a section revised show
63. mm 211 216 mm 217 257 258 297 139 mm or less 3 3 3 3 Width 140 148 mm 5 5 3 3 149 182 mm 5 5 3 3 183 210 mm 5 5 5 3 65 18 Paper exit section Theory of Operation Ver 1 0 Nov 2005 18 Paper exit section 18 1 Composition magicolor 2480MF gt 4139T2C558AA 4139T2C510AA Exit Sensor PS7 2 w Q I 2 E a E 5 Paper Exit Roller 4139T2C552AA 66 Theory of Operation Ver 1 0 Nov 2005 18 Paper exit section 18 2 Drive magicolor 2480MF Fusing Motor M4 Paper exit roller DG 4139T2C557AA 2 S 7 Q 9 9 18 3 Operation 18 3 1 Exit Tray Full Detection The Exit Tray is provided with a paper full detection system When the Exit Tray Full Sen Sor is unblocked the corresponding message will be displayed on the control panel Exit Tray Capacity plain paper 100 sheets Exit Tray Full Sensor PS11 4139T2C553AA 67 magicolor 2480MF I 2 o E o s 19 Image stabilization control Theory of Operation Ver 1 0 Nov 2005 19 Image stabilization control 19 1 Overview To ensure that a stabilized output image is produced at all times the following image sta bilization contr
64. nce 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 show to the left of the revised section A number within represents the number of times the revision has been made To indicate clearly a section revised show A in the lower outside section of the correspond ing page A number within 4 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 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 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 2005 11 1 0 Issue of the first edition Date Service manual Ver Revision mark Descriptions of revision Theory of Operation Ver 1 0 Nov 2005 CONTENTS 5 a Duplex Option 3 E Outline 1 Product Specifications ves siii eerie cn i d se E a EA a Ek E CERE CR EXER Rc 1 Composition Operation 2 COMPOSITION T 3 3 P 4 4 Mechanical Operation erre c tant
65. ng Roller tem 185 perature below 60 C a The fusing temperature in the standby state is changed if the standby state lasts for 20 min or longer Machine interior temperature is less than 20 C 170 C Machine interior temperature is 20 C or more 165 C C During print cycle To ensure good fusing performance the set temperature of each roller is varied accord ing to the paper type and environment 1 Monochrome printing Temperature control is changed back to that listed under Ordinary Environment in the table when the Temperature Humidity Sensor TEM HUMS detects 20 C or more I 2 E o fe Ordinary Temperature humidity Media Type environment Sensor less than 20 C Plain paper plain paper letterhead 169 174 Plain paper plain paper letterhead 257 mm or less 169 174 Thick stock thick stock postcards labels 169 OHP 169 Envelopes 194 8 Glossy stock 169 a The temperature is controlled at 159 C if the machine interior temperature is 20 C or more and humidity is 4096 or higher 62 Theory of Operation Ver 1 0 Nov 2005 17 Fusing section 2 Color printing 1 sided If the print cycle is started in a condition in which the Temperature Humidity Sensor TEM HUMS detects 20 C or more control is returned back to one having a control temperature of more than 60 C after
66. o Driven Roller Transfer Belt v 1st Transfer Roller IDC Sensor IDC e m Q RS Transfer Belt Drive Roller Cleaning Blade Toner Collecting Screw Photo Conductor Belt Positioning Sensor PS4 4139T2C519AA 36 Theory of Operation Ver 1 0 Nov 2005 13 Image Transfer Section 13 1 2 2nd transfer section magicolor 2480MF 4139102020 0 4139T2C506AA 2 g a Q 2nd Transfer Roller 5 T a e Pressure Retraction Clutch Retraction Slider Pressure Retraction Roller 4139T2C520AA Pressure Retraction Slider 2nd Transfer Roller 4139T2C521AA 37 13 Image Transfer Section Theory of Operation Ver 1 0 Nov 2005 13 2 Drive Main Motor M1 magicolor 2480MF 2nd Transfer Roller Transfer Belt Drive re Transfer Belt Unit 1st Transfer Roller 4139T2C522AA 13 3 Operation s 2 lt I s fe 13 3 1 Transfer Belt cleaning mechanism To scrape residual toner off the surface of the Transfer Belt there is a Cleaning Blade provided The Cleaning Blade is pressed up against the Transfer Belt thereby scraping residual toner off the surface of the Transfer Belt The Toner Collecting Screw conveys toner scraped off by the Cleaning Blade onto the Drum Cartridge Driven Roller b Toner Collecting Screw 4139102074 0
67. oaded in the Lower Feeder Unit the actuator is raised which unblocks the sensor When there is no paper the actuator drops into the slit in the Paper Lift Plate thus block ing the sensor Lower Feeder Unit s e S Q fo o At paper empty condition Under normal condition ADBSTDEBO7AA Theory of Operation Ver 1 0 Nov 2005 4 Mechanical operation 4 3 Tray Set Detection The Lower Feeder Unit is provided with a Tray Set Detecting Switch SW1 that is attached with a segment lever When Tray 2 is inserted the switch actuator on the right hand side of Tray 2 pushes the lever This turns ON the Tray Set Detecting Switch SW1 Lever Tray Set Detecting Switch SW1 N N OFF Switch Actuator Tray 2 4056T2E508AA Lower Feeder Unit s 2 S 7 Q 9 E 9 4 Mechanical operation Theory of Operation Ver 1 0 Nov 2005 Lower Feeder Unit s 8 E Q s fe Blank Page p n SS KONICA MINOLTA SERVICE MANUAL THEORY OF OPERATION Duplex Option 2005 11 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 performa
68. ols are provided Purpose Control Detection To ensure stabilized transfer output ATVC Described in the section dealing with the Transfer Section Temperature humidity Sensor TEM HUMS To ensure stabilized image density to ensure good tone reproduction AIDC control Leak detection control AIDC intensity control Reflectance measurement control Control of the maximum amount of toner sticking Laser intensity adjustment control y correction control IDC Sensor IDC Temperature humidity Sensor TEM HUMS An explanation is given of the control for each section 4AIDC Sensor Developing 1st Transfer Roller Charging 2nd Transfer Roller Developing Bias AIDC Control i Temperature i humidity Sensort Grid Bias punta gt AIVC 4139t02098e0 68 Theory of Operation Ver 1 0 Nov 2005 19 Image stabilization control 19 2 Operation 19 2 1 Leak detection control Forthe clearance between the Photo Conductor and Developing Roller an optimum developing bias voltage is established that does not result in a leak image or uneven density magicolor 2480MF 19 2 2 AIDC Sensor LED intensity control The following adjustment is made to correct any changes in characteristics occurring due to change with
69. or the 2nd Transfer Roller In the standby state the 2nd Transfer Roller is in a position retracted from the Transfer Belt A Pressure retraction operation The pressure retraction operation is performed by the Main Motor M1 Pressure Retraction Solenoid 2nd Image Transfer SD4 and Pressure Retraction Clutch e When the Pressure Retraction Solenoid 2nd Image Transfer SD4 is energized drive from the Main Motor M1 is transmitted to the Pressure Retraction Clutch I s e E lt s fe Main Motor Transfer Belt 2nd Transfer Assy Pressure Retraction Clutch S Pressure Retraction Solenoid 2nd Image Transfer Pressure Retraction Clutch 4139t02079e0 42 Theory of Operation Ver 1 0 Nov 2005 13 Image Transfer Section 1 Pressure sequence 1 Drive from the Main Motor M1 is transmitted to the drive gear 2 Rotation of the drive gear is transmitted to the Pressure Retraction Clutch 3 When the Pressure Retraction Solenoid 2nd Image Transfer SD4 is energized the Pressure Retraction Clutch rotates a half turn This moves the Pressure Slider 4 When the Pressure Slider is moved ribs on the Pressure Slider push up the 2nd Transfer Assy 5 When the 2nd Transfer Assy is pushed up the 2nd Transfer Roller is pressed up against the Transfer Belt magicolor 2480MF Pressure Retraction Roller 2nd Transfer Assy Pressure Retraction Soleno
70. ovided by the Fusing Motor 4 To prevent fusing failure the fusing speed is changed in three steps according to the media type Media Type Fusing Speed mm sec Plain paper letterhead 126 78 Thick stock postcards labels glossy stock 63 39 OHP film envelopes 42 26 B Speed stabilization To prevent double transferred image or brush effect the difference between the fusing speed and paper transport speed during image transfer is corrected The fusing speed is changed in two steps relative to the system speed either at high speed which is 2 of the system speed or low speed which is 2 5 of the system speed The Fusing Motor M4 is controlled to achieve this speed change in two steps 58 Theory of Operation Ver 1 0 Nov 2005 17 Fusing section C Operation flow 1 2 3 The initial fusing speed is set to the low speed thereby forming a loop in the paper between the 2nd Transfer Roller and Fusing Rollers When the length of the loop formed in the paper becomes greater the Fusing Paper Loop Sensor PS8 is activated blocked While the Fusing Paper Loop Sensor PS8 remains activated the fusing speed is kept at the high level When the Fusing Paper Loop Sensor PS8 is deactivated the fusing speed is immediately switched to the low level The sequence of these operations is repeated so that the fusing speed is changed automatically according to the loop length This effect
71. owever locked to prevent the IR Unit from being opened when the Auto Document Feeder Unit is raised open This is done to prevent the machine from toppling over IR Unit Lock Pawl 4139T2C547AA 13 magicolor 2480MF 2 S fe 7 Q 9 A 9 7 Scanner Section IR Section Theory of Operation Ver 1 0 Nov 2005 A IR Unit open close operation Pulling the IR Unit Lock Release Lever will disengage the IR Unit Lock Pawl allowing the IR Unit to be opened magicolor 2480MF em gt j IR Unit Lock Pawl IR Unit Lock Release Lever 4139T2C550AA When the Auto Document Feeder Unit is raised open the ADF Lever is pushed upward to lock the IR Unit Lock Release Lever thus preventing the IR Unit from being opened ADF Lever 2 S Q lt s 6 v MENS CA IR Unit in unlocked condition IR Unit in locked condition 4139T2C548AA 14 Theory of Operation Ver 1 0 Nov 2005 7 Scanner Section IR Section 7 3 2 Auto Document Feeder Unit Open Close To prevent the Auto Document Feeder Unit from being raised or lowered when the IR Unit is opened or closed the Auto Document Feeder Unit is secured to the IR Unit when the IR Unit is to be opened or closed When the IR Unit Lock Release Lever is pulled the AD
72. product s rated voltage and current and the plug has pin terminal s for grounding and aD 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 neutral 1 Green Yellow PE earth Wrong connection may cancel safeguards within the product and results in fire or electric shock 5 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 ab electric shock Connect power plug directly into wall outlet having same configuration as the plug Use of an adapter leads to the product connec
73. r Roller ba Transfer Belt 4139t02082e0 A Operation timing The 2nd Transfer Roller cleaning sequence is carried out under any of the following timings Power Switch is turned ON Cover is opened and closed A media error occurs during a print cycle A paper empty condition occurs during a print cycle A paper size error occurs during a print cycle I s o lt I s fe After Transfer Belt cleaning Pressure Retraction Solenoid Pressed 2nd Image Transfer SL4 2nd transfer cleaning bias 4139t02083e0 44 Theory of Operation Ver 1 0 Nov 2005 13 Image Transfer Section 13 3 5 Neutralization and separation of paper To neutralize the paper that has undergone the 2nd transfer process a Charge Neutraliz ing Cloth is provided for the guide plate after the 2nd Transfer Roller magicolor 2480MF Charge Neutralizing Cloth 9 3 Charge Neutralizing Cloth 2nd Transfer Roller Transfer Belt 4139t02084e0 13 3 6 Belt Positioning Sensor When development takes place in this machine the image of each color of toner is formed on the surface of the Transfer Belt The leading edge of the image of each color of toner must therefore be aligned correctly with each other on the surface of the Transfer Belt The position of the Transfer Belt is detected when the Belt Positioning Sensor PS4 detects de
74. ration timing Mode Operation Timing The environment in which the Power Switch is turned ON is different from the environ ment the machine was in when the Power Switch was turned OFF last The environment in which the Energy Saver mode is canceled is different from the Mode 1 environment the machine was in when it entered the Energy Saver mode last The Power Switch is turned OFF and ON or the Energy Saver mode is canceled after a predetermined number of printed pages have been produced Anew Drum Cartridge or Toner Cartridge is detected magicolor 2480MF The Power Switch is turned OFF and ON or the Energy Saver mode is canceled after a Made predetermined number of printed pages have been produced 19 4 Operation flow Mode 1 Mode 2 ATVC control AIDC intensity control Control of the maximum amount of toner sticking Reflectance measurement control Laser intensity control Leak detection control s I s fe AIDC intensity control Reflectance measurement control Control of the maximum amount of toner sticking Laser intensity control y correction control 4139102099 0 70 Theory of Operation Ver 1 0 Nov 2005 20 Other control 20 Other control 20 1 Fan control 20 1 1 Construction magicolor 2480MF IR Cooling Fan Motor Exhaus
75. red or a malfunction has occurred C IR Cooling Fan Motor Full speed conditions Forthe predetermined period of time after the Power Switch has been turned ON Atthe start of a print cycle full speed rotation after the lapse of a predetermined period of time of half speed rotation Half speed conditions Atthe end of a print cycle half speed rotation after the lapse of a predetermined period of time of full speed rotation Half speed rotation under any condition other than above 72 Theory of Operation Ver 1 0 Nov 2005 20 Other control 20 2 Temperature Humidity Sensor 20 2 1 Composition The Temperature Humidity Sensor is used to detect the temperature of the inside of the machine It is also used for image stabilization transfer ATVC and fusing temperature control magicolor 2480MF A Temperature Humidity Sensor TEM HUMS 4139T2C555AA E s e nS 6 9 73 20 Other control Theory of Operation Ver 1 0 Nov 2005 magicolor 2480MF s 2 o E Q s fe Blank Page 74 KONICA MINOLTA SERVICE MANUAL THEORY OF OPERATION Auto Document Feeder Unit 2005 11 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 T
76. rent can leak leading to a risk of electric shock or a fire Carefully remove all toner remnants and dust from electri cal parts and electrode units such as a charging corona unit CD 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 Q J AU 5 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 ris
77. rface of the Photo Conductor or the image This prevents a foggy image from occurring and the Photo Conductor from being worn Developing Roller Photo Conductor 4139t02063e1 29 12 Developing section Theory of Operation Ver 1 0 Nov 2005 12 2 5 Toner Cartridge Rack 3 The Toner Cartridge Rack is mounted with four Toner Cartridges The rack employs a SI rotary system 5 Development of the image of each color of toner is performed by rotating the Toner Car 8 tridge Rack D o E Y Toner K Toner Cartridge x Cartridge cosi C Toner M Toner Cartridge Cartridge 4139102064 0 4139101528 0 A Toner Cartridge Rack drive The Toner Cartridge Rack is driven by the Rack Motor 2 2 S Q lt Rack Motor 4139T2C556AA Rack Motor 4139102065 0 30 Theory of Operation Ver 1 0 Nov 2005 12 Developing section B Toner Cartridge Rack stop position The Toner Cartridge Rack must be brought to a stop so that the Toner Cartridge of each color of toner is located at its correct position To accomplish this task three stop posi tions are established the standby reference position the developing position and the cartridge replacement position The standby position refers to the position at which the Toner Cartridge Rack is station ary when the machine is in the standby st
78. rive ae lai ilaria 14 3 Operation 14 3 1 Toner collecting mechanism 48 14 3 2 Waste toner full detection system ii 49 15 Paper feed section ian 15 1 COMPOSITION crece etre saio 15 2 DYING 15 3 s hien rete net tv a a detuvo 15 3 1 Paper feed control Theory of Operation Ver 1 0 Nov 2005 15 3 2 Paper feed speed CONtrol iene 51 15 3 3 Paperfeed mechanism iren edi 52 15 3 4 Double feed prevention iii 53 15 3 5 Paper empty condition detection ii 53 15 3 6 Paper feed retry fUNCtion ui 53 16 Conveyance Section Registration Roller 54 1641 ias abitanti 54 16 2 Drive E 16 3 CCL AON ERR Rn 55 16 3 1 Registration Roller CONtrol u iii 55 16 3 2 OHP filmidetectioni ciu aaa 56 16 3 3 Size error detection control 56 17 FUSING SCCHOM 57 171i Gompositioni 57 17 2 DIG oiii rna Ea ER CO Ea ERR Eia FO Fo AERE ii 58 17 3 Operation 58 17 3 1 Heating Roller drive control eee ennt nnns 58 17 3 2 Fusing temperature Control i 60 17 3 3 Protection against abnormally high temperature 64 17 3 4 PPM control ntn rre tie tetra
79. s formed in the paper at the Registration Roller s 2 S 7 Q s 9 Paper feed sequence started Tray1 Paper Pick up Solenoid SL1 lai Drive stopped Registration Roller Solenoid SL2 mm Registration Sensor PC1 4139t02105e0 55 16 Conveyance Section Registration Roller Theory of Operation Ver 1 0 Nov 2005 16 3 2 OHP film detection To ensure that the paper of the correct type is being used the OHP Sensor PS2 detects the type of the paper being conveyed e When the Registration Sensor PS1 is activated the Sensor PS2 is also acti vated and the type of paper being conveyed is determined if it is OHP film or any type other than OHP If the Sensor PS2 is not deactivated the machine determines that the paper is type other than OHP film If the OHP Sensor PS2 is activated the machine determines that the paper is OHP film f the paper type specified by the controller when a print request is made does not match the results of OHP Sensor PS2 detection the machine suspends the print cycle and displays a corresponding message on the control panel magicolor 2480MF OHP Sensor Registration Roller TN OHP Sensor Reflection Mirror s lt I s fe 4139102092 0 4139102093 0 16 3 3 Size error detection control
80. sk of fire Check whether the power cord is not stepped on or 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 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 O o amp ta 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 Install
81. stabilizes at 180 C 3 4 During a print cycle Heating Roller temperature setting 189 C if the Heater Roller temperature at the start of the warm up cycle is 60 C or less Heating Roller temperature setting 184 C if the Heater Roller temperature at the start of the warm up cycle is more than 60 C p Temperature control is performed accord ing to the temperature measured with the Temperature Humidity Sensor For details see 2 Color printing 1 sided P 63 In standby state Heating Roller temperature setting 180 C 61 magicolor 2480MF 2 S 7 Q 9 9 17 Fusing section Theory of Operation Ver 1 0 Nov 2005 A Warm up Control is provided until the Heating Roller temperature reaches 178 C This control is performed when the Power Switch is turned ON a malfunction or paper misfeed is reset the Energy Saver mode is canceled or the door is opened and closed B In standby The fusing temperature in the standby state is prevented from being dropped The control temperature in the standby state after the warm up cycle which was started with the Heating Roller temperature 60 C or less is changed to that of the ordinary standby after the lapse of a predetermined period of time magicolor 2480MF Standby State Temperature C Ordinary standby 180a In standby state after the warm up cycle started with the Heati
82. stance of the 1st Constant Measure Constant Transfer Roller current resistance current E Y Establish the 1st transfer output voltage 2nd Transfer Roller 1st Transfer Roller 8 5 5 Y Transfer Belt Transfer Belt fo Apply the constant current the 2nd Y Y Transfer Roller 8 Transfer Belt Photo Conductor drive roller ground Y Measure the resistance of the 2nd Transfer Roller Y Establish the 2nd transfer output voltage 1st transfer ATVC operation 1 The data on the 1st transfer constant current for each color of toner output from the High Voltage Unit HV is fed back to the High Voltage Unit via the 1st Transfer Roller Transfer Belt and the Photo Conductor ground The resistance of the Trans fer Belt is thereby measured 2 Based the measured resistance value the optimum 1st transfer voltage is established C 2nd transfer ATVC operation 1 The data on the 2nd transfer constant current output from the High Voltage Unit HV is fed back to the High Voltage Unit via the 2nd Transfer Roller Transfer Belt and the Transfer Belt drive roller The resistance of the Transfer Belt is thereby measured 2 Basedon the measured resistance value and inconsideration of the environmental conditions and print color the optimum 2nd transfer voltage is established 46 Theory of Operation Ver 1 0 Nov 2005 14 Toner collecting section 14 Toner collecting sec
83. stment not described in the documentation If the prescribed 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 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 Check the exterior and frame for edges burrs and other damage Q 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 P a or fire Check wiring for squeezing and any other damage Cur
84. sureRoller Circuit FUSER WDT Watchdog Circuit RESET Heater Remote ON OFF 4139t02097e0 64 Theory of Operation Ver 1 0 Nov 2005 17 Fusing section 17 3 4 PPM control PPM control is provided to prevent the temperature on edges of the Heating Roller from increasing during a multi print cycle using plain paper of a small size The distance between sheets of paper is widened according to the number of printed pages set to be produced and the paper length This evens out the temperature of the Heating Roller and thus stabilizes fusing performance of the printed toner image To perform the PPM control the number of printed pages per minute is established for each paper size magicolor 2480MF A Monochrome ordinary environment Length Less than 210 mm 210 215 mm 216 256 mm 257 296 mm 139 mm or less 14 14 14 14 Width 140 148 mm 18 18 14 14 149 182 mm 19 18 14 14 183 210 mm 20 20 20 14 E B Monochrome low temperature environment i The low temperature environment refers to the condition in which the Temperature amp Humidity Sensor TEM HUMS detects a temperature of less than 20 C Length 8 210 mm 211 216 mm 217 257 258 297 139 mm less 12 12 12 12 E Width 140 148 mm 15 15 12 12 149 182 mm 16 15 12 12 183 210 mm 17 17 17 12 C Color environment Length 210
85. t Power Supply Cooling Fan Motor Suction s 2 S fe 7 Q 9 A 9 Ventilation Fan Motor Exhaust 4139T2C554AA 71 20 Other control Theory of Operation Ver 1 0 Nov 2005 20 1 2 Control A Power Supply Cooling Fan Motor lt Full speed conditions gt For the predetermined period of time after the Power Switch has been turned ON For the specified period of time up to the end of Energy Saver mode Atthe start of a print cycle full speed rotation after the lapse of a predetermined period of time of half speed rotation No full speed rotation is performed if the print cycle is completed during half speed rotation magicolor 2480MF Half speed conditions Atthe end of a print cycle half speed rotation after the lapse of a predetermined period of time of full speed rotation Half speed rotation under any condition other than above Stop conditions n Energy Saver mode The Power Supply Cooling Fan Motor FM1 develops a malfunction B Ventilation Fan Motor Full speed condition While the Main Motor M1 remains energized Stop conditions The lapse of a predetermined period of time after the Main Motor M1 has been deener gized Stop under any condition other than above I s 2 o o lt s fe lt Forced stop condition gt A door is opened a paper misfeed has occur
86. tection holes provided in the Transfer Belt There are two detection holes provided in the Transfer Belt The image write start posi tion is varied according to the paper size For a paper size of A4 or smaller the image write start position is aligned with detection hole A For a paper size greater than A4 detection hole B serves as the reference for the image write start position s 2 S 7 Q E 9 Direction of Rotation of Transfer Belt Detection Hole A amp Ae 4 Detection Hole Belt Positioning Sensor 413910210460 45 13 Image Transfer Section Theory of Operation Ver 1 0 Nov 2005 13 3 7 ATVC Auto Transfer Voltage Control The ATVC or Auto Transfer Voltage Control is for optimizing the transfer output A con stant current is made to flow through each of the Transfer Rollers From the voltage thereby detected the resistance of each of the 1st Transfer Roller 2nd Transfer Roller and Transfer Belt is measured The ATVC then automatically adjusts the appropriate image transfer output voltage to be applied to the 1st Transfer Roller and the 2nd Trans fer Roller during the print cycle magicolor 2480MF A Overview of ATVC operation Apply the constant current the 1st Transfer Roller Constant voltage Y Measure the resi
87. th a single sheet of paper resident the system 2 sided printing with two sheets of paper resident in the system When the FD length is no less than 276 mm no more than 297 mm Automatic 2 sided printing is not effective when the FD length is less than 276 mm 4 3 1 Operations in 2 sided printing with a single sheet of paper resident in the system Operation 1 Paper Exit Roller The first sheet of paper is taken up and fed in from the main unit drawer and the main unit starts the first print cycle to produce the print image of the second page of the original Operation 2 Immediately before the 1 sided print leaves the Paper Exit Roller the direction of rotation of the Paper Exit Roller is 2 reversed and the 1 sided print is transported toward and into the Duplex Option Operation 3 The paper conveyed through the Duplex Option is tempo rarily stopped at the Duplex take up position Any skew in the paper is corrected at the Registration Roller before the paper is taken up and fed by the Duplex Option BT 2 CO Theory of Operation Ver 1 0 Nov 2005 4 Mechanical operations Operation 4 The main unit carries out the second print cycle to produce the print image of the first page of the original on the other side of the 1 sided print Operation 5 While feeding the first 2 sided print out of itself the main 2 4 unit carries out the first print cycle
88. 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 show to the left of the revised section A number within represents the number of times the revision has been made To indicate clearly a section revised show A in the lower outside section of the correspond ing page A number within 4 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 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 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 2005 11 1 0 Issue of the first edition Date Service manual Ver Revision mark Descriptions of revision Theory of Operation Ver 1 0 Nov 2005 CONTENTS 2 Lower Feeder Unit Outline 5 1 Product specifications iii eerie cn hi f sea EG a Ek E EE CR EXER ER cca Composition Operation 2 COMPOSItioni T 3 P H 4 Mechanical OoperatiOn nii rentrer eror tactus 4 1 Conveyance Drive Mechanism 4
89. ting to inadequate power supply voltage current capacity a grounding 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 If excessive current flows in the wall outlet fire may ap 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 S4 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 ri
90. tion 14 1 Composition magicolor 2480MF Waste Toner Conveyance Unit 4139T2C507AA Toner Agitating Screw s 2 S fe 7 Q 9 A 9 4139T2C523AA 14 2 Drive Toner Collecting Screw Transfer belt Driv n Roller 4139T2C524AA 47 14 Toner collecting section Theory of Operation Ver 1 0 Nov 2005 14 3 Operation 14 3 1 Toner collecting mechanism Waste toner scraped off by the Cleaning Blade of the Transfer Belt and that scraped off by the Cleaning Blade of the Photo Conductor are conveyed by each of the Toner Col lecting Screws into the Drum Cartridge magicolor 2480MF A Image Transfer Belt Unit Waste toner scraped off by the Cleaning Blade is collected by the Toner Collecting Screw for Transfer Belt The waste toner collected by the Toner Collecting Screw is conveyed to the Drum Car tridge by way of the Waste Toner Conveyance Unit Toner Collecting Screw s e lt I s Toner Agitating Screw 4139102085 0 48 Theory of Operation Ver 1 0 Nov 2005 14 Toner collecting section 14 3 2 Waste toner full detection system A waste toner near full condition is detected using the output state of the Waste Toner Near Full Detect Board led WTDTB LED A waste toner near full condition is detected b
91. tter i 1 241 Paper Type Plain paper 60 to 90 g m 16 to b Recycled paper 60 to 90 g m 16 to 24 Ib C Machine specifications Power Requirements DC 24 V 10 supplied from the main unit DC 5 V 5 supplied from the main unit Max Power Consumption 42W Dimensions 370 W x 153 D x 327 H mm 14 1 2 W x 6 D x 12 3 4 H inch Weight Approx 2 3 kg 5 Ib D Operating environment Temperature 10 to 35 C 50 to 95 F with a fluctuation of 10 C 18 F or less per hour Humidity 15 to 85 with a fluctuation of 20 h NOTE These specifications are subject to change without notice pi x a a 1 Product specifications Theory of Operation Ver 1 0 Nov 2005 st z 2 Si EI a Blank Page Theory of Operation Ver 1 0 Nov 2005 2 Composition Composition Operation 2 Composition Duplex Option 4057T2C509AA A X Transport Roller 1 Fd 4057T2C501AA s 2 S 7 Q E 9 Registration Roller Na C Transport Roller 2 Reverse Motor 2 Cooling Fan Motor FM1 di Transport Motor M1 amp Door Sensor PS2 a _ Registration Solenoid SD1 Transport S
92. tween 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 s e E o lt I s fe 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 E 1382M009AA Theory of Operation Ver 1 0 Nov 2005 4 Mechanical operations 4 2 Document Transport Exit Mechanism 4 2 1 Document transport mechanism The original that has been taken up blocks the Paper Feed Sensor The Transport Roller turns to transport the original up to the document scanning position of the printer The Main Motor drives the Transport Roller through a gear train Auto Document Feeder Unit Main Motor M1 Paper Feed Sensor PS2 Transport Roller s 2 S ej 7 Q 9 A 9 4556T2C503AA 4 Mechanical operations Theory of Operation Ver 1 0 Nov 2005 4 2 2 Document exit mechanism The Exit Roller turns to feed the original out of the Document Feeder During this sequence the original blocks the Paper Leading Edge Detection Sensor and is fed onto the Document Exit Tray The Main Motor turns the Exit Roller through a gear
93. um trouble and property damage Symbols used for safety and important warning items are defined as follows Precaution when servicing A A A the product General Electric hazard High precaution temperature Prohibition when servicing CS NV the product General Do not touch Do not prohibition with wet hand disassemble Direction when servicing the e 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 N DANGER 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 D
94. wer cord from the wall outlet Drum cleaner isopropyl alcohol and roller cleaner ace SIE tone based are highly flammable and must be handled 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 N A risk of fire exists SAFETY AND IMPORTANT WARNING ITEMS Handling of Service Materials CAUTION 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 SAFETY AND IMPORTANT WARNING ITEMS 4 Laser Safety This is a digital machine certified as a class 1 laser product There is no possibility of danger from a laser provided the machine is serviced according to the instruction in this manual 4 1 Internal Laser Radiation Semiconductor laser Maximum power of the laser diode 10 mW Maximum average radiation power 7 5 uW Wavelength 775 800 nm Laser Aperture of the Print Head Unit This product employs a Class 3b laser diode that emits 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 SERVICE ITEM Therefore the print head unit
95. y letting the light emitted from the LED mounted on the Waste Toner Near Full Detect Board led WTDTB LED travel through the light guide To prevent false detection the Drum Cartridge is provided with the Toner Agitating Screw that ensures that the waste toner is evenly stored magicolor 2480MF Waste Toner Detection Area Light Guide Waste Toner Near Full Detection Board s 2 S lt 7 Q 9 A 9 4139t02086e1 Light Guide LED Light LED Waste Toner EE Normal Condition At Waste Toner Near Full Condition 4139t02087e0 A Waste toner near full condition detection control Light emitted from the LED mounted on the Waste Toner Near Full Detect Board led WTDTB LEDWTDTB LED is made to travel through the light guide This light is blocked if the waste toner reaches an upper limit which allows the machine to determine that there is a waste toner near full condition To prevent false detection the Drum Cartridge is provided with the Toner Agitating Screw that ensures that the waste toner is evenly stored B Waste toner full detection control The machine determines that there is a waste toner full condition when 200 images are reached after a waste toner near full condition has been detected The initiation of any new print cycle is prohibited when 50 full color printed pages are produced after the waste toner near full condition has been d
96. y the Developing Motor M3 and Intermediate Gear When the Toner Cartridge Rack is stationery at the developing position the Developing Roller Drive Gear comes into mesh with the Intermediate Gear The Developing Roller is then rotated through the drive provided by the Developing Motor M3 and Intermediate Gear s 2 S lt 7 Q A s E 9 Developing Roller Drive Gear Intermediate Gear Developing Motor M3 4139T2C518AA 27 12 Developing section Theory of Operation Ver 1 0 Nov 2005 ae 12 2 1 Developing drive control N 5 Polygon Motor Energized K Toner Standby Position Developing Belt Positioning Position Print Start Sensor Activated Rack Motor M2 Developing Motor M3 Fri Developing bias AC O la DI Developing bias DC Main Motor M1 Charge output bias 4139t02102e0 amp I 12 2 2 Toner flow 3 1 Toner stored in the Hopper is agitated by the Agitating Blade and conveyed into the e Toner Supply Portion by the Conveyance Blade fitted to the leading edge of the Agi tating Blade 2 The toner conveyed into the Toner Supply Portion is conveyed by the Supply Roller onto the Developing Roller 3 Atthis time Regulator Blade 1st and 2nd regulate the height of toner on the sur face of the

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