Konica Minolta CF5001 Service Manual
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Konica Minolta CF5001 Service Manual

Konica Minolta CF5001 Service Manual

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CF5001

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Summary of Contents for Konica Minolta CF5001

  • Page 1: Service Manual

    Service Manual [General] CF5001...

  • Page 2: Table Of Contents

    CF5001 Ver.1.0 Sep. 2003 CONTENTS CONTENTS SAFETY AND IMPORTANT WARNING ITEMS..........S-1 IMPORTANT NOTICE .
  • Page 3 CONTENTS CF5001 Ver.1.0 Sep. 2003 6.11 2nd transfer roller /L cleaning (Sub step 4) ......... 1-28 6.12 Toner collection (Sub step 5) .
  • Page 4 CF5001 Ver.1.0 Sep. 2003 CONTENTS Operation ..............2-37 7.2.1...
  • Page 5 CONTENTS CF5001 Ver.1.0 Sep. 2003 14.5 Gamma correction control ............2-68 15.

  • Page 6: Safety And Important Warning Items

    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 ser- vice work. IMPORTANT NOTICE Because of possible hazards to an inexperienced person servicing this copier as well as the risk of damage to the copier, Minolta Corporation strongly recommends that all servicing be performed only by Minolta-trained ser- vice technicians.

  • Page 7: Safety Warnings

    SAFETY AND IMPORTANT WARNING ITEMS SAFETY WARNINGS MODIFICATIONS NOT AUTHORIZED BY MINOLTA Minolta copiers are renowned for their high reliability. This reliability is achieved through high-quality design and a solid service network. Copier design is a highly complicated and delicate process where numerous mechanical, physical, and electrical aspects have to be taken into consideration, with the aim of arriving at proper tolerances and safety factors.
  • Page 8 SAFETY AND IMPORTANT WARNING ITEMS CHECKPOINTS WHEN PERFORMING ON-SITE SERVICE Minolta copiers are extensively tested before shipping, to ensure that all applicable safety standards are met, in order to protect the customer and customer engineer (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.
  • Page 9 SAFETY AND IMPORTANT WARNING ITEMS WARNING: Power Plug and Cord • 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.
  • Page 10 SAFETY AND IMPORTANT WARNING ITEMS WARNING: Ground Lead • Pay attention to the point to which the ground lead is connected. Connecting the ground lead to an improper point such as the points listed below results in a risk of explosion and electric shock: a.
  • Page 11 SAFETY AND IMPORTANT WARNING ITEMS CAUTION: Ventilation • The copier generates ozone gas during operation, but it is not sufficient to be harmful to the human body. If a bad smell of ozone is present in the following cases, ventilate the room. a.
  • Page 12 SAFETY AND IMPORTANT WARNING ITEMS DANGER: Work Performed with the Copier Powered • Take every care when servicing with the external cover detached. High-voltage exists around the drum unit. A risk of electric shock exists. WARNING: Safety Checkpoints • Check the exterior and frame for edges, burrs, and other damages. The user or CE may be injured.
  • Page 13 SAFETY AND IMPORTANT WARNING ITEMS WARNING: Safety Checkpoints • After replacing a part to which AC voltage is applied (e.g., optical lamp and fixing lamp), be sure to check the installation state. A risk of fire exists. • Check the interlock switch and actuator for loosening and check whether the interlock functions properly.
  • Page 14 SAFETY AND IMPORTANT WARNING ITEMS DANGER : HANDLING OF SERVICE MATERIALS • Do not replace the cover or turn the copier ON before any solvent remnants on the cleaned parts have fully evaporated. A risk of fire exists. • Use only a small amount of cleaner at a time and take care not to spill any liquid.

  • Page 15: Safety Information

    SAFETY AND IMPORTANT WARNING ITEMS SAFETY INFORMATION IMPORTANT INFORMATION The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration implemented regulations for laser products manufactured since August 1, 1976. Compliance is mandatory for products mar- keted in the United States.

  • Page 16: Safety Circuits

    SAFETY AND IMPORTANT WARNING ITEMS SAFETY CIRCUITS This machine is provided with the following safety circuits to prevent machine faults from resulting in serious accidents. • Overall protection circuit • Fixing upper lamp /1 (L2), Fixing upper lamp /2 (L3), Fixing lower lamp (L4) overheating prevention circuit These safety circuits are described below to provide them in order to prevent servicing errors that may the service engineer with a renewed awareness of...
  • Page 17 SAFETY AND IMPORTANT WARNING ITEMS Fixing upper lamp /1 (L2), Fixing upper lamp /2 (L3), Fixing lower lamp (L4) overheating prevention circuit PRCB ACDB AC driver FHCB section Control section 8050sf002e 2.1 Protection by software The output voltage from fixing temperature sensor /1 (TH1) and fixing temperature sensor /2 (TH2) is read by the CPU.

  • Page 18: Indication Of Warning On The Machine

    SAFETY AND IMPORTANT WARNING ITEMS INDICATION OF WARNING ON THE MACHINE Caution labels shown below are attached in some areas on/in the machine. When accessing these areas for maintenance, repair, or adjustment, special care should be taken to avoid burns and electric shock. 8050sf003e CAUTION Please adhere to all caution labels to avoid burns or injury.
  • Page 19 SAFETY AND IMPORTANT WARNING ITEMS 8050sf004e CAUTION Please adhere to all caution labels to avoid burns or injury. S-14...
  • Page 20 SAFETY AND IMPORTANT WARNING ITEMS 8050sf005e CAUTION Please adhere to all caution labels to avoid burns or injury. S-15...
  • Page 21 SAFETY AND IMPORTANT WARNING ITEMS 8050sf006e CAUTION Please adhere to all caution labels to avoid burns or injury. S-16...
  • Page 22 SAFETY AND IMPORTANT WARNING ITEMS 8050sf007e CAUTION Please adhere to all caution labels to avoid burns or injury. S-17...

  • Page 23: Safety And Important Warning Items

    SAFETY AND IMPORTANT WARNING ITEMS Unplug the machine before removing platen glass. Debrancher le copieur avant de retirer la vitre d'exposition. Desenchufe la maquina antes de quitar el vidrio. Desconecte a unidade da tomada antes de remover o vidro de exposicao. 8050sf008e CAUTION Please adhere to all caution labels to avoid burns or injury.

  • Page 24: Ioutline

    CF5001 Ver.1.0 Sep. 2003 OUTLINE OF SYSTEM OUTLINE 1. OUTLINE OF SYSTEM [13] [14] [12] [11] [10] [12] [11] 8050ma1001 Main body Trimmer (TMG-3) LCT (C-208) Finisher (FN-9) Printer controller (Fiery S300 50C-K) [10] Finisher (FN-120) Hard disk (HDD-7) [11]...

  • Page 25: Product Specifications

    PRODUCT SPECIFICATIONS CF5001 Ver.1.0 Sep. 2003 2. PRODUCT SPECIFICATIONS A. Type Type: Console type (floor-mounted type) Copying method: Tandem intermediate transfer type electrostatic method Original table: Fixed Original alignment: Rear left side as reference Photosensitive material: Sensitizing method: Laser writing...
  • Page 26 CF5001 Ver.1.0 Sep. 2003 PRODUCT SPECIFICATIONS First copy time: Full color: Less than 7.6 sec. (platen mode, life size, manual density, paper feed tray /1 to /3, plain paper, without gloss, face up paper exit, A4 or 8.5 x 11) Monochrome: Less than 7.6 sec.
  • Page 27 PRODUCT SPECIFICATIONS CF5001 Ver.1.0 Sep. 2003 C. Copy paper Standard specified paper: For full color: Neusiedler Color Copy 90g/m Hammermill Tidal 75 g/m For black-and-white: Konica Business Class 80 g/m Hammermill Laser Color Copy Photo White/ Brightness 96 105 g/m...

  • Page 28: Center Cross Section

    CF5001 Ver.1.0 Sep. 2003 CENTER CROSS SECTION 3. CENTER CROSS SECTION [21] [22] [20] [19] [18] [17] [16] [15] [10] [14] [13] [12] [11] 8050ma1002 Process unit [12] Paper feed tray /3 Developing unit /Y [13] Paper feed tray /2...

  • Page 29: Paper Path

    PAPER PATH CF5001 Ver.1.0 Sep. 2003 4. PAPER PATH Front side 8050ma1029...
  • Page 30 CF5001 Ver.1.0 Sep. 2003 PAPER PATH Back side 8050ma1030...

  • Page 31: Drive System Diagram

    DRIVE SYSTEM DIAGRAM CF5001 Ver.1.0 Sep. 2003 5. DRIVE SYSTEM DIAGRAM Drum drive 8050ma1003 Drum motor /Y, /M, /C, /K (M14, M15, M16, M17) Drum...

  • Page 32: Transfer Belt Conveyance/Pressure Drive

    CF5001 Ver.1.0 Sep. 2003 DRIVE SYSTEM DIAGRAM Transfer belt conveyance/pressure drive [16] [15] [14] [13] [12] [11] [10] 8050ma1004 1st transfer roller /Y Belt drive roller Drum [10] While in stand-by (Total release) 1st transfer roller /M [11] Black-and-white mode...

  • Page 33: Developing Drive

    DRIVE SYSTEM DIAGRAM CF5001 Ver.1.0 Sep. 2003 Developing drive [4] [3] 8050ma1005 Toner collection screw Toner conveyance screw Toner agitator screw Developing coupling /1 Developing coupling /2 Developing sleeve Developing motor /Y, /M, /C, /K (M20, M21, M22, M23) 1-10...

  • Page 34: Toner Supply Drive

    CF5001 Ver.1.0 Sep. 2003 DRIVE SYSTEM DIAGRAM Toner supply drive [12] [13] [11] [10] [14] 8050ma1006e Toner supply gear /A (Same shaft as C) Toner supply motor /C (M51) Toner bottle clutch /Y (MC14) Toner bottle motor (M53) Toner bottle clutch /M (MC15)

  • Page 35: Toner Collection Drive

    DRIVE SYSTEM DIAGRAM CF5001 Ver.1.0 Sep. 2003 Toner collection drive 8050ma1007 Drum waste toner receiving port Vertical conveyance pipe Horizontal conveyance screw Belt collection screw Horizontal conveyance pipe Transfer belt motor (M18) Paper feed motor (M41) Belt collection drive cam...

  • Page 36: Fixing Drive

    CF5001 Ver.1.0 Sep. 2003 DRIVE SYSTEM DIAGRAM Fixing drive FRONT 8050ma1008 Web motor (M54) Fixing roller /L Fixing roller /U Fixing motor (M29) One-way clutch Fixing paper exit roller Pressure/release cam 1-13...

  • Page 37: Paper Feed Drive

    DRIVE SYSTEM DIAGRAM CF5001 Ver.1.0 Sep. 2003 Paper feed drive 5.7.1 Paper feed tray /1 to /3 drive [17] [19] [18] [27] [21] [20] [15] [16] [23] [24] [26] [22] [25] [14] [13] [12] [11] [10] 8050ma1009 Pre-registration roller /3...

  • Page 38: Vertical Conveyance Drive

    CF5001 Ver.1.0 Sep. 2003 DRIVE SYSTEM DIAGRAM [15] Up/down wire [22] Feed roller /2 [16] Tray up drive motor /1 (M40) [23] Paper feed clutch /2 (MC9) [17] Paper feed roller /1 [24] Drive coupling /2 [18] Feed roller /1...

  • Page 39: Adu Drive

    DRIVE SYSTEM DIAGRAM CF5001 Ver.1.0 Sep. 2003 ADU drive 5.8.1 By-pass tray drive 8050ma1011 Up/down gear Drive coupling Paper feed roller /BP Feed roller /BP Double feed prevention roller /BP Paper feed clutch /BP (MC6) Paper feed motor (M41) Tray up drive motor /BP (M35)

  • Page 40: Registration Drive/Loop Drive

    CF5001 Ver.1.0 Sep. 2003 DRIVE SYSTEM DIAGRAM 5.8.2 Registration drive/loop drive 8050ma1012 Loop roller motor (M31) Registration roller Loop roller Registration roller motor (M30) 1-17...

  • Page 41: Adu Conveyance Drive

    DRIVE SYSTEM DIAGRAM CF5001 Ver.1.0 Sep. 2003 5.8.3 ADU conveyance drive [11] [15] [10] [12] [13] [14] [1] [2] [4] [5] [18] [16] [17] 8050ma1013 Intermediate conveyance roller /2 [10] ADU conveyance clutch /2 (MC1) Intermediate conveyance clutch /2 (MC4)

  • Page 42: Reverse Paper Exit Drive

    CF5001 Ver.1.0 Sep. 2003 DRIVE SYSTEM DIAGRAM 5.8.4 Reverse paper exit drive 8050ma1014 Reverse gate Reverse/exit roller /2 Reverse/exit motor (M33) Decurler roller Reverse/exit solenoid (SD4) 1-19...

  • Page 43: Main Body Paper Exit Drive

    DRIVE SYSTEM DIAGRAM CF5001 Ver.1.0 Sep. 2003 Main body paper exit drive 8050ma1015 Reverse gate Reverse/exit roller /2 Drive coupling Timing belt Reverse/exit motor (M33) Paper exit roller 1-20...

  • Page 44: Scanner Drive

    CF5001 Ver.1.0 Sep. 2003 DRIVE SYSTEM DIAGRAM 5.10 Scanner drive FRONT 8050ma1016 Exposure unit Scanner drive wire /R Scanner drive wire /F Scanner motor (M1) V-mirror unit 1-21...

  • Page 45: Image Creation Process

    IMAGE CREATION PROCESS CF5001 Ver.1.0 Sep. 2003 6. IMAGE CREATION PROCESS Image creation flow and function Step Process Function Step 1 Charging process Forms the layer of charges on the photosensitive drum. Step 2 Laser exposure process Form an electrostatic latent image on the photosensitive drum.

  • Page 46: Charging Process (Step 1)

    CF5001 Ver.1.0 Sep. 2003 IMAGE CREATION PROCESS Charging process (Step 1) The charging corona, having a gold-plated tungsten wire, is applied with a high DC voltage (minus) to neg- atively charge the surface of the photosensitive drum by wire discharge. The charging corona is provided with a charging control plate to make charges on the surface of the photosensitive drum uniform.

  • Page 47: Developing Process (Step 3)

    IMAGE CREATION PROCESS CF5001 Ver.1.0 Sep. 2003 Developing process (Step 3) In the electrostatic latent image on the photosensitive drum, the non-image section is negatively charged and the image section is neutralized. When toner, that is, negatively charged is brought close to the photo- sensitivity drum, toner is attracted to the image section on the drum by the potential difference with the developing bias and becomes visible.

  • Page 48: 1St Transfer Process (Step 4)

    CF5001 Ver.1.0 Sep. 2003 IMAGE CREATION PROCESS 1st transfer process (Step 4) Toner on each drum of Y, M, C and K is transferred onto the transfer belt, this allows for overlapping of the colors. This movement of toner from the drum to the transfer belt is referred to as the 1st transfer, where the transfer of toner is carried out sequentially in the order of Y, M, C and K.

  • Page 49: 2Nd Transfer Process (Step 5)

    IMAGE CREATION PROCESS CF5001 Ver.1.0 Sep. 2003 2nd transfer process (Step 5) The operation to transfer the toner image of the four colors on the transfer belt to paper is referred to as the 2nd transfer. While in the 2nd transfer, the 2nd transfer roller /L provided at the lower section of the transfer belt conveys paper while pressing it against the transfer belt.

  • Page 50: Drum Cleaning (Sub Step 1)

    CF5001 Ver.1.0 Sep. 2003 IMAGE CREATION PROCESS Drum cleaning (Sub step 1) A drum that has completed the 1st transfer has a residual amount of toner that is left from the transfer pro- cess. The process to remove toner is referred to as drum cleaning.

  • Page 51: Transfer Belt Cleaning (Sub Step 3)

    IMAGE CREATION PROCESS CF5001 Ver.1.0 Sep. 2003 6.10 Transfer belt cleaning (Sub step 3) A transfer belt that has completed the 2nd transfer has a residual amount of toner that is left from the trans- fer process. The process to remove toner is referred to as a transfer belt cleaning.

  • Page 52: Toner Collection (Sub Step 5)

    CF5001 Ver.1.0 Sep. 2003 IMAGE CREATION PROCESS 6.12 Toner collection (Sub step 5) Toner that was cleaned in the drum cleaning section and the transfer belt cleaning section is collected into the toner collection box through the toner collection screw.
  • Page 53 IMAGE CREATION PROCESS CF5001 Ver.1.0 Sep. 2003 Blank Page 1-30...

  • Page 54: Unit Explanation

    CF5001 Ver.1.0 Sep. 2003 SCANNER UNIT EXPLANATION 1. SCANNER Composition [7] [8] PS1 PS2 CONT DRIVE SCDB PRCB OACB 8050ma2001 Symbol Name Function or method CCD board (CCDB) Converts an analog signal to a digital signal DF reset read switch (RS1)

  • Page 55: Operation

    SCANNER CF5001 Ver.1.0 Sep. 2003 Symbol Name Function or method APS sensor /L Detects the original size in the sub-scan direction (for large size) APS sensor /S Detects the original size in the sub-scan direction (for small size) Operation 1.2.1...

  • Page 56: Shading Correction Reading

    CF5001 Ver.1.0 Sep. 2003 SCANNER 1.2.2 Shading correction reading The exposure unit starts the shading correction with the white standard board attached to the platen glass once it completes the home position search. In the shading correction operation, the white correction is performed twice and the black correction once.

  • Page 57: Original Reading Mode

    SCANNER CF5001 Ver.1.0 Sep. 2003 1.2.3 Original reading mode There are two original reading modes, the platen mode and the DF mode. The original reading is a com- mon operation. A. When copying with the manual density setting 8050ma2005 Home position...

  • Page 58: Original Reading Control

    CF5001 Ver.1.0 Sep. 2003 SCANNER 1.2.4 Original reading control The reflection from the exposed original reaches to the CCD sensor through the lens. The CCD sensor outputs an electric signal (analog) proportional to the amount of light and then the analog signal is con- verted to a digital signal in the CCD board (CCDB) according to directions from the overall control board (OACB).
  • Page 59 SCANNER CF5001 Ver.1.0 Sep. 2003 (2) When AE/ACS has been set (the platen mode) 8050ma2052 Home position 2nd white correction AE/ACS scan (429 mm/s) Platen APS position Exposure scan (220 mm/s) 1st white correction Home position search...
  • Page 60 CF5001 Ver.1.0 Sep. 2003 SCANNER (3) When AE/ACS has been set (the DF mode) [10] [11] [12] [13] [14] 8050ma2053 Home position Original replacing time AE/ACS scan for the 2nd page (429 mm/s) Platen APS position [10] Exposure scan for the 2nd page (220 mm/s)

  • Page 61: Aps Control

    SCANNER CF5001 Ver.1.0 Sep. 2003 1.2.5 APS control The APS control is performed in the printer control board (PRCB) with signals read by the APS sensor /S (PS3), the APS sensor /L (PS4), and the CCD sensor when the platen cover or RADF is opened/closed.

  • Page 62: Ae Control

    CF5001 Ver.1.0 Sep. 2003 SCANNER 1.2.6 AE control The CCD sensor installed on the A/D converter board (ADB) reads the copy density during the AE scan, it performs the process responsive to the read density on the overall control board (OACB), and then it selects the most favorable γ...
  • Page 63 SCANNER CF5001 Ver.1.0 Sep. 2003 D. Other image processing (1) Brightness/density conversion (2) Text/dot pattern/photo/map judgement (3) Filtering (4) Magnification change processing (5) Error diffusion processing (6) Data compression/elongation processing (7) AE (8) ACS (9) Screen processing 2-10...

  • Page 64: Write

    CF5001 Ver.1.0 Sep. 2003 WRITE 2. WRITE Composition CONT CLOCK LOCK TEMP.ER [23] [24] [25][26] [27] [28] [29] [30] [31] PRCB [22] [21] [20] [19] [18] [17] [16] [6][5][4][3] [15] [14] [13] [12] [11] [10] 8050ma2010 Symbol Name Function or method...
  • Page 65 WRITE CF5001 Ver.1.0 Sep. 2003 Symbol Name Function or method [13] Index sensor board /C (INDX Controls the laser writing position in the main scan direction SB C) (write unit /C) [14] Index sensor board /K (INDX Controls the laser writing position in the main scan direction...

  • Page 66: Operation

    CF5001 Ver.1.0 Sep. 2003 WRITE Operation 2.2.1 Image writing The RGB image data from the CCD sensor is converted into digital data, individually, in the A/D converter board (ADB) and then, it is sent to the overall control board (OACB). The OACB converts RGB signals to YMCK signals with the image processing board (IPB).
  • Page 67 WRITE CF5001 Ver.1.0 Sep. 2003 A. Types of the color registration correction control There are following 5 color registration correction controls. The write units are mechanically adjusted in the "Partial horizontal magnification"; however, the correction is performed automatically in the other four.
  • Page 68 CF5001 Ver.1.0 Sep. 2003 WRITE [13] [12] [11] [10] 8050ma2055 Drum /Y Write unit /K Write unit /Y Transfer belt Drum /M [10] Direction of image Write unit /M [11] Color registration sensor /F (PS8) Drum /C [12] Color registration sensor /R (PS9)
  • Page 69 WRITE CF5001 Ver.1.0 Sep. 2003 C. Procedure for the color registration automatic correction control operation 1. Transferring the color registration mark The color registration marks " " for each color are transferred on the transfer belt in order of black (K), cyan (C), magenta (M), and yellow (Y).
  • Page 70 CF5001 Ver.1.0 Sep. 2003 WRITE 2. Detecting the color registration mark PS8 and PS9 detect the edge of the color registration mark " " for each color and convert to digital sig- nals. The edge detection for one " " is performed at four positions.
  • Page 71 WRITE CF5001 Ver.1.0 Sep. 2003 The passage time differences between black (K) and each color are determined from the passage times detected at above. The time difference is called the color drift amount due to the image write timing. It also determines the difference between the edge detection timing difference for black (K) and the edge detec- tion timing differences for each color.

  • Page 72: Drum Unit

    CF5001 Ver.1.0 Sep. 2003 DRUM UNIT 3. DRUM UNIT Composition [26] [25] PS60 [24] [23] PS61 DRDB/Y [22] PS62 DRDB/M PS63 PS64 PS65 DRDB/C [21] [6] [7] [8] PS66 [27] [28] [29] [30] [10] [11] [12] PS67 DRDB/K [13] [14] [15] [16]...
  • Page 73 DRUM UNIT CF5001 Ver.1.0 Sep. 2003 Symbol Name Function or method [10] Charging /M Forms a charging potential on the surface of the drum /M DC corona discharge (Scotron) Wire discharge: gold-plated tungsten wire (φ 30µm) Constant-current method DC output range: -450 to -1100µA...
  • Page 74 CF5001 Ver.1.0 Sep. 2003 DRUM UNIT Symbol Name Function or method [27] Drum potential sensor /K (DRPS K) Detects the surface potential of the drum /K [28] Drum potential sensor /C (DRPS C) Detects the surface potential of the drum /C...
  • Page 75 DRUM UNIT CF5001 Ver.1.0 Sep. 2003 Symbol Name Function or method PS66 Encoder sensor /K1 Detects the rotation of the encoder for the drum /K Manages the drive of the drum motor /K (M17) There are two sensors, PS 66 and PS67, at opposite of the...

  • Page 76: Operation

    CF5001 Ver.1.0 Sep. 2003 DRUM UNIT Operation 3.2.1 Image formation timing Paper feed motor (M41) Drum motor /Y (M14) Drum motor /M (M15) Drum motor /C (M16) Drum motor /K (M17) Transfer belt motor (M18) 1st transfer pressure/release motor (M19)

  • Page 77: Developing Unit

    DEVELOPING UNIT CF5001 Ver.1.0 Sep. 2003 4. DEVELOPING UNIT Composition DRIVE CLOCK LOCK DRIVE CLOCK LOCK DRIVE CLOCK LOCK DRIVE CLOCK LOCK [12][13][14][15] [16] [10] [11] [17] PRCB 8050ma2013 Symbol Name Function or method Conveyance screw Conveyance of developer from the agitator screw to the...
  • Page 78 CF5001 Ver.1.0 Sep. 2003 DEVELOPING UNIT Symbol Name Function or method Developing unit /M Adhesion of magenta toner to the image transferred on the drum /M [10] Developing unit /C Adhesion of cyan toner to the image transferred on the drum /C...

  • Page 79: Operation

    DEVELOPING UNIT CF5001 Ver.1.0 Sep. 2003 Operation 4.2.1 Flow of developer Developer in the developing unit, after being agitated by the agitator screw, is supplied to the developing sleeve by the conveyance screw. At this time, the bristles amount of the developer on the developing sleeve is regulated by the developing regulation plate.

  • Page 80: Developing Bias Control

    CF5001 Ver.1.0 Sep. 2003 DEVELOPING UNIT 4.2.4 Developing bias control A. Control path The developing bias /Y, /M, /C and /K are supplied from the high voltage unit /1 (HV1) and controlled by the printer control board (PRCB). Each developing bias is supplied with AC + DC to secure the uniformity of developing.

  • Page 81: Transfer Belt Unit

    TRANSFER BELT UNIT CF5001 Ver.1.0 Sep. 2003 5. TRANSFER BELT UNIT Composition DRIVE CLOCK PS69 PS68 [10] [11] C REG/1 C REG/2 PS15 [12] [13] DRIVE PRCB [14] 8050ma2015 Symbol Name Function or method 1st transfer roller /Y Transfer of images from the drum /Y to the transfer belt (1st trans-...
  • Page 82 CF5001 Ver.1.0 Sep. 2003 TRANSFER BELT UNIT Symbol Name Function or method Toner guide brush Scraping and collection of toner on the transfer belt [10] Toner collection screw Conveys toner from the belt cleaning section to the toner collec- tion section...

  • Page 83: Operation

    TRANSFER BELT UNIT CF5001 Ver.1.0 Sep. 2003 Operation 5.2.1 Transfer belt pressure/release mechanism The 1st transfer roller that presses the transfer belt against the drum is made up of the 1st transfer rollers / Y, /M and /C for the drums /Y, /M and /C and the 1st transfer roller /K for the drum /K. The 3 1st transfer roll- ers /Y, /M and /C of these rollers operate as a unit (color 1st transfer roller assembly).

  • Page 84: Image Correction Unit

    CF5001 Ver.1.0 Sep. 2003 TRANSFER BELT UNIT 5.2.2 Image correction unit A. Composition DRIVE PRCB DRIVE 8050ma2017 Symbol Name Function or method Gamma sensor shutter solenoid (SD3) Open/close of the image density sensor shutter 24 VDC drive Color registration shutter solenoid (SD2)

  • Page 85: 1St Transfer Control

    TRANSFER BELT UNIT CF5001 Ver.1.0 Sep. 2003 5.2.3 1st transfer control Toner on the drum is transferred onto the transfer belt side by a bias value applied on the 1st transfer roller provided inside the transfer belt. The DC bias value of the 1st transfer roller changes according to the following conditions: •...

  • Page 86: Toner Supply

    CF5001 Ver.1.0 Sep. 2003 TONER SUPPLY 6. TONER SUPPLY Composition [11] [10] [12] [13] [14][15] [16] PS14 DRIVE DRIVE DRIVE CLOCK CW/CCW DRIVE PRCB DRIVE DRIVE TSDB 8050ma2018 Symbol Name Function or method Toner bottle clutch /C (MC16) Transmission of driving force from the toner bottle motor (M53)

  • Page 87: Operation

    TONER SUPPLY CF5001 Ver.1.0 Sep. 2003 Symbol Name Function or method [12] Toner level detection sensor /M Detection of the toner level in the toner hopper section /M (TLD M) (Detection is made at the remaining quantity of about 50 g) Toner bottle capacity: Approx.

  • Page 88: Copy/Print Operation Stop Control Due To No Toner

    CF5001 Ver.1.0 Sep. 2003 TONER SUPPLY 6.2.3 Copy/print operation stop control due to no toner After the no-toner display is shown on the operation LCD, the consumption of about 50g of remaining toner in the toner hopper is detected by the length of time during which the toner supply motor has been driven.

  • Page 89: Toner Collection

    TONER COLLECTION CF5001 Ver.1.0 Sep. 2003 7. TONER COLLECTION Composition DRIVE CLOCK LOCK [10] [11] DRIVE [12] CLOCK LOCK [13] [14] [15] PRCB 8050ma2019 Symbol Name Function or method Waste toner door PS (PS53) Open/close detection of the toner collection door, presence/...

  • Page 90: Operation

    CF5001 Ver.1.0 Sep. 2003 TONER COLLECTION Symbol Name Function or method Belt collection screw Waste toner conveyance from the belt waste toner receiving port to the upper section of the vertical conveyance pipe Screw method [10] Drum /Y waste toner receiving port...

  • Page 91: Paper Feed Tray /1 To /3

    PAPER FEED TRAY /1 TO /3 CF5001 Ver.1.0 Sep. 2003 8. PAPER FEED TRAY /1 TO /3 Composition DRIVE PS31 PS30 PS29 CLOCK LOCK PS37 PS36 DRIVE [11] [12] [13] [14] [15] PS35 PS32 PS33 PS34 DRIVE [10] PS38 MC10...
  • Page 92 CF5001 Ver.1.0 Sep. 2003 PAPER FEED TRAY /1 TO /3 Symbol Name Function or method [11] Feed roller /2 Feed of the tray /2 paper [12] Double feed prevention roller /1 Double feed prevention of the tray /1 paper [13]...

  • Page 93: Operation

    PAPER FEED TRAY /1 TO /3 CF5001 Ver.1.0 Sep. 2003 Symbol Name Function or method PS40 Paper size /L2 Detection of the paper size along the length of the tray /2 PS41 Pre-registration sensor /3 Detection of paper conveyance at the pre-registration roller /3 entrance...

  • Page 94: Up/Down Plate Control

    CF5001 Ver.1.0 Sep. 2003 PAPER FEED TRAY /1 TO /3 8.2.2 Up/down plate control The up/down plate in the paper feed tray is driven by the wire. When the paper feed tray /1 is set to the main body, the tray up drive motor /1 (M40) of the main body starts to rotate.

  • Page 95: Paper Size Detection Control

    PAPER FEED TRAY /1 TO /3 CF5001 Ver.1.0 Sep. 2003 8.2.4 Paper size detection control The main scan direction is detected by the resistance value of the paper size VR/1 (VR1) of the bottom of the paper feed tray. The sub-scan direction is detected in the combination of the on/off of the paper size /S1 (PS33) of the up/ down plate and the paper size /L1 (PS34).

  • Page 96: By-Pass Feed

    CF5001 Ver.1.0 Sep. 2003 BY-PASS FEED 9. BY-PASS FEED Composition DRIVE CLOCK LOCK PRCB DRIVE CVDB 8050ma2020 Symbol Name Function or method Paper size/LBP (PS49) Paper size detection along the length of the by-pass tray No paper sensor/BP (PS47) Detection of the presence of the by-pass feed paper...

  • Page 97: Operation

    BY-PASS FEED CF5001 Ver.1.0 Sep. 2003 Operation 9.2.1 Tray up drive control When Pick-up solenoid/BP (SD5) turns on after the paper feed motor (M41) turns on, the up/down plate is raised with paper going up. When pulling out ADU, coupling comes off the drive section and the up/down plate comes down by its own weight.

  • Page 98: Vertical Conveyance

    CF5001 Ver.1.0 Sep. 2003 VERTICAL CONVEYANCE 10. VERTICAL CONVEYANCE 10.1 Composition DRIVE CLOCK MC13 LOCK PRCB PS50 PS51 8050ma2050 Symbol Name Function or method Vertical conveyance door Cleaning paper jam in the vertical conveyance section Intermediate conveyance roller /1 Paper conveyance of the trays /2 and /3 Paper feed motor See "8.

  • Page 99: Registration/Adu/Reverse/Paper Exit

    REGISTRATION/ADU/REVERSE/PAPER EXIT CF5001 Ver.1.0 Sep. 2003 11. REGISTRATION/ADU/REVERSE/PAPER EXIT 11.1 Composition PS24 [6] [7] [8] [9] [10] [11] PS13 [21] PS55 PS12 [12] [13] [14] [15] [16] [17] [18] [19] [20] PS27 PS19 PS28 PS22 PS23 PS20 PS21 CVDB PRCB...
  • Page 100 CF5001 Ver.1.0 Sep. 2003 REGISTRATION/ADU/REVERSE/PAPER EXIT Symbol Name Function or method Decurler roller Paper conveyance and paper curl correction in the reverse section Motor drive Fixing section Fixing of paper that has been transferred See "12. Fixing Section." ADU conveyance roller /1...
  • Page 101 REGISTRATION/ADU/REVERSE/PAPER EXIT CF5001 Ver.1.0 Sep. 2003 Symbol Name Function or method Registration roller motor Registration roller drive Stepping motor Loop roller motor Loop roller drive Stepping motor ADU reverse motor ADU reverse roller drive Stepping motor Reverse/exit motor Driving of the paper exit roller, decurler roller and the reverse/...

  • Page 102: Operation

    CF5001 Ver.1.0 Sep. 2003 REGISTRATION/ADU/REVERSE/PAPER EXIT Symbol Name Function or method PS24 2nd transfer HP sensor 2nd transfer roller home position detection Photo sensor PS27 Intermediate conveyance sen- Detection of paper at the intermediate conveyance roller /2 sor /1 exit...
  • Page 103 REGISTRATION/ADU/REVERSE/PAPER EXIT CF5001 Ver.1.0 Sep. 2003 B. ADU conveyance path The ADU conveyance path is applicable to the face-down paper exit in the single side copy mode and the conveyance to the ADU after completion of the front side copy in the double sided copy mode.
  • Page 104 CF5001 Ver.1.0 Sep. 2003 REGISTRATION/ADU/REVERSE/PAPER EXIT C. Straight paper exit operation (single sided 2 copies) Paper feed motor (M41) Registration roller motor (M30) Fixing motor (M29) Reverse/exit motor (M33) Reverse/exit solenoid (SD4) Fixing exit sensor (PS17) Reverse/exit sensor (PS19) Paper exit sensor (PS13)
  • Page 105 REGISTRATION/ADU/REVERSE/PAPER EXIT CF5001 Ver.1.0 Sep. 2003 D. ADU conveyance operation (double sided 2 copies) Paper feed motor (M41) Registration roller motor (M30) Fixing motor (M29) Reverse/exit motor (M33) Reverse/exit solenoid (SD4) Fixing exit sensor (PS17) Reverse/exit sensor (PS19) Paper exit sensor (PS13)

  • Page 106: Reverse/Exit Control

    CF5001 Ver.1.0 Sep. 2003 REGISTRATION/ADU/REVERSE/PAPER EXIT 11.2.2 Reverse/exit control A. Reverse/exit path The reverse/exit path is applicable to the face-down paper exit after completion of copy in the single side copy mode, as well as after completion of the back side copy in the double sided copy mode.

  • Page 107: Adu Conveyance Control

    REGISTRATION/ADU/REVERSE/PAPER EXIT CF5001 Ver.1.0 Sep. 2003 B. Reverse/exit operation (single sided 2 copies) Paper feed motor (M41) Registration roller motor (M30) Fixing motor (M29) Reverse/exit motor (M33) Reverse/exit solenoid (SD4) Fixing exit sensor (PS17) Reverse/exit sensor (PS19) Paper exit sensor (PS13)

  • Page 108: Paper Reverse Control

    CF5001 Ver.1.0 Sep. 2003 REGISTRATION/ADU/REVERSE/PAPER EXIT 11.2.4 Paper reverse control A. Paper reverse path (1) When conveying paper Paper conveyed from the reverse/exit roller /2 is conveyed to the ADU reverse roller according to the form of the conveyance path.
  • Page 109 REGISTRATION/ADU/REVERSE/PAPER EXIT CF5001 Ver.1.0 Sep. 2003 B. Paper reverse operation Paper feed motor (M41) Registration roller motor (M30) ADU reverse motor (M32) Reverse/exit sensor (PS19) ADU paper reverse sensor (PS21) V TOP [2] [3] [4] [5] 8050ma2031 START button (ON)

  • Page 110: Adu Pre-Registration Control

    CF5001 Ver.1.0 Sep. 2003 REGISTRATION/ADU/REVERSE/PAPER EXIT 11.2.5 ADU pre-registration control The paper conveyed from the ADU switchback section is formed into a loop between the ADU conveyance roller /2 and the ADU pre-registration roller, and a paper skew is corrected.

  • Page 111: Registration Control

    REGISTRATION/ADU/REVERSE/PAPER EXIT CF5001 Ver.1.0 Sep. 2003 11.2.6 Registration control Paper conveyed to the loop roller is formed into a loop between the registration roller and the loop roller, and paper skew is corrected. A. Registration path 8050ma2034 Intermediate conveyance roller /2...

  • Page 112: 2Nd Transfer Control

    CF5001 Ver.1.0 Sep. 2003 REGISTRATION/ADU/REVERSE/PAPER EXIT 11.2.7 2nd transfer control The paper that has been conveyed from the registration roller undergoes the 2nd transfer by the pressure of the 2nd transfer roller /L on the transfer belt. A. 2nd transfer roller /L pressure/release mechanism...

  • Page 113: Fixing Unit

    FIXING UNIT CF5001 Ver.1.0 Sep. 2003 12. FIXING UNIT 12.1 Composition PS17 FHCB ACDB CLOCK LOCK PS16 CVDB 8050ma2043e Symbol Name Function or method Fixing roller /U Toner fixing by means of pressure and heating Heating roller method Silicon rubber + PFA resin layers Temperature: 210 °C...
  • Page 114 CF5001 Ver.1.0 Sep. 2003 FIXING UNIT Symbol Name Function or method Fixing upper lamp /1 Heating of the fixing roller /U (main) Halogen heater 750 W Fixing upper lamp /2 Heating of the fixing roller /U (sub) Halogen heater 750 W...

  • Page 115: Operation

    FIXING UNIT CF5001 Ver.1.0 Sep. 2003 12.2 Operation 12.2.1 Fixing drive control Paper is conveyed with the heated fixing roller /U and the heated fixing roller /L pressed together, and is fixed with toner. The pressure of the fixing roller is released at idling.

  • Page 116: Pressure/Release Control

    CF5001 Ver.1.0 Sep. 2003 FIXING UNIT 12.2.2 Pressure/release control The pressure of the fixing roller /L onto the fixing roller /U is made by the reverse rotation of the fixing motor (M29) and the cam mechanism. A. Pressure/release operation When the fixing motor (M29) [1] rotates in the reverse direction, the cam mechanism applies pressure (a broken line in the drawing) onto the fixing roller /L [3].

  • Page 117: Web Control

    FIXING UNIT CF5001 Ver.1.0 Sep. 2003 12.2.3 Web control The web motor (M54) is driven for a specified period of time for each print to clean the fixing roller /U through the cleaning roller. The operation of M54 starts at the same time as the registration roller motor (M30). In order to make web travel distance even on the cleaning roller, the ON time of M54 is determined by the accumulated M54 drive time.

  • Page 118: Interface

    CF5001 Ver.1.0 Sep. 2003 INTERFACE 13. INTERFACE 13.1 Composition 8050ma2037 Symbol Name Function or method Video interface for controller For controller Serial port (RS-232C) For RD-mode communications D-SUB 9-pin connector Parallel port (based on IEEE 1284) For ISW of copier...

  • Page 119: Image Stabilization Control

    IMAGE STABILIZATION CONTROL CF5001 Ver.1.0 Sep. 2003 14. IMAGE STABILIZATION CONTROL 14.1 Toner density control The purpose of this control is to correct the reference value of toner density for each color against variable factors of the image density such as environmental factors.

  • Page 120: Charging Potential Control

    CF5001 Ver.1.0 Sep. 2003 IMAGE STABILIZATION CONTROL 14.3 Charging potential control 14.3.1 Correction of the reference value The purpose of this control is to set the charging potential for each color to the reference level. The charging potential control is carried out by the drum potential sensors /Y, /M, /C and /K (DRPS Y, M, C...

  • Page 121: Dot Diameter Adjustment Control

    IMAGE STABILIZATION CONTROL CF5001 Ver.1.0 Sep. 2003 14.4 Dot diameter adjustment control The dot diameter adjustment control is a method by which intermediate exposure potential is output stably, regardless of the changes in the sensitivity of photosensitive materials or the stain of the writing system.

  • Page 122: Other Controls

    CF5001 Ver.1.0 Sep. 2003 OTHER CONTROLS 15. OTHER CONTROLS 15.1 Parts to which power is supplied even when the reset switch is turned off CBR1 CBR2 8050ma2038 ACDB Regardless of the on/off position of the reset switch (SW1), the following components are supplied with power so long as the power cord is plugged into the power outlet.

  • Page 123: Parts That Operate Only When The Power Switch Is Turned On

    OTHER CONTROLS CF5001 Ver.1.0 Sep. 2003 15.2 Parts that operate only when the power switch is turned on 15.2.1 Parts that operate when the reset switch is turned on 5VDC REMOTE DCPS1 OACB 3.3VDC 5VDC 12VDC 5VDC 12VDC DF-319 5VDC...

  • Page 124: Fan Control

    CF5001 Ver.1.0 Sep. 2003 OTHER CONTROLS 15.3 Fan control 15.3.1 Fan composition DRIVE DRIVE [14] [15] [16] [17] [18] DRIVE DRIVE [13] [19] DRIVE SCDB DRIVE DRIVE DRIVE DRIVE [12] DRIVE DRIVE DRIVE DRIVE DRIVE [11] DRIVE DRIVE DRIVE [10]...

  • Page 125: Operation Board Control

    OTHER CONTROLS CF5001 Ver.1.0 Sep. 2003 15.4 Operation board control 15.4.1 Operation board composition TOUCH PANEL BOARD LCDB OB INVB OACB 8050ma2041 Symbol Name Function or method Touch panel board Touch switch board used to directly select items shown on the...

  • Page 126: Counter Control

    CF5001 Ver.1.0 Sep. 2003 OTHER CONTROLS 15.5 Counter control 15.5.1 Counter composition OACB C(T) C(BK) C(K) OPTION COIN VENDOR (SERIAL) OPTION PS13 PRCB 8050ma2042 Symbol Name Function or method Coin vendor (serial) Copying is controlled depending on the presence of a coin.
  • Page 127 OTHER CONTROLS CF5001 Ver.1.0 Sep. 2003 D. C (BK) This counts up in conjunction with the paper exit counter. E. C (K) This counts up in conjunction with the paper exit counter. Signals in serial connection Connector Pin No. Signal name...

  • Page 128: Acs Control

    CF5001 Ver.1.0 Sep. 2003 OTHER CONTROLS 15.6 ACS control 15.6.1 Switching between the color mode and the black and white mode If more than 5 black and white sheets are fed consecutively from RADF in which both the color sheets and the black and white sheets are stored, the pressure on the 1st transfer rollers /Y/M/C are released and it shifts to the black and white mode.
  • Page 129 OTHER CONTROLS CF5001 Ver.1.0 Sep. 2003 Blank Page 2-76...
  • Page 130 Copyright 2003 KONICA MINOLTA BUSINESS TECHNOLOGIES, INC. Printed in Japan Use of this manual should be strictly supervised to avoid disclosure of confidential information. 7661-4969-11 0309xxxx...

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