Service Manual [General] CF5001
CF5001 Ver.1.0 Sep. 2003 CONTENTS SAFETY AND IMPORTANT WARNING ITEMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-1 IMPORTANT NOTICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-1 DESCRIPTION ITEMS FOR DANGER, WARNING AND CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-1 I OUTLINE CONTENTS SAFETY WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONTENTS CF5001 Ver.1.0 Sep. 2003 6.11 2nd transfer roller /L cleaning (Sub step 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28 I OUTLINE 6.12 Toner collection (Sub step 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29 6.13 Process speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29 II UNIT EXPLANATION 1.
CF5001 Ver.1.0 Sep. 2003 Toner collection control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37 7.2.2 Waste toner full detection control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37 8. PAPER FEED TRAY /1 TO /3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38 8.1 Composition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONTENTS CF5001 Ver.1.0 Sep. 2003 14.5 Gamma correction control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-68 I OUTLINE 15. OTHER CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-69 15.1 Parts to which power is supplied even when the reset switch is turned off . . . . . . . . . . . . . . . . . 2-69 15.
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 copier as well as the risk of damage to the copier, Minolta Corporation strongly recommends that all servicing be performed only by Minolta-trained service technicians.
SAFETY AND IMPORTANT WARNING ITEMS SAFETY WARNINGS 1. 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.
SAFETY AND IMPORTANT WARNING ITEMS 2. 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. In order to maintain safety and reliability, the CE must perform regular safety checks. 2.
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. • 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.
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. Gas pipe (A risk of explosion or fire exists.) b. Lightning rod (A risk of electric shock or fire exists.) c. Telephone line ground (A risk of electric shock or fire exists in the case of lightning.) d.
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. When the copier is used in a poorly ventilated room b. When making a lot of copies c. When using multiple copiers at the same time CAUTION: Vibration • When installing the copier, read the Installation Guide thoroughly.
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. • Do not allow any metal parts such as clips, staples, and screws to fall into the copier. They can short internal circuits and cause electric shock or fire.
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. If the interlock does not function, you may receive an electric shock or be injured when you insert your hand in the copier (e.g., for clearing paper jam).
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. 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. 3.
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 marketed in the United States. This copier is certified as a “Class 1” laser product under the U.S.
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 impair their functions. 1.
SAFETY AND IMPORTANT WARNING ITEMS 2. Fixing upper lamp /1 (L2), Fixing upper lamp /2 (L3), Fixing lower lamp (L4) overheating prevention circuit PRCB ACDB TH1 L2 TH3 TH2 Control section AC driver section FHCB TS1 L3 TS2 L4 TH4 RL1 RL1 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. If this voltage is abnormal, L2, L3, and L4 are turned OFF by opening main relay (RL1).
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.
SAFETY AND IMPORTANT WARNING ITEMS 8050sf004e CAUTION Please adhere to all caution labels to avoid burns or injury.
SAFETY AND IMPORTANT WARNING ITEMS 8050sf005e CAUTION Please adhere to all caution labels to avoid burns or injury.
SAFETY AND IMPORTANT WARNING ITEMS 8050sf006e CAUTION Please adhere to all caution labels to avoid burns or injury.
SAFETY AND IMPORTANT WARNING ITEMS 8050sf007e CAUTION Please adhere to all caution labels to avoid burns or injury.
SAFETY AND IMPORTANT WARNING ITEMS PS 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.
CF5001 Ver.1.0 Sep. 2003 OUTLINE I OUTLINE I OUTLINE OF SYSTEM 1.
PRODUCT SPECIFICATIONS CF5001 Ver.1.0 Sep. 2003 I OUTLINE 2. PRODUCT SPECIFICATIONS A.
CF5001 Ver.1.0 Sep. 2003 First copy time: PRODUCT SPECIFICATIONS Full color: Less than 7.6 sec. paper feed tray /1 to /3, plain paper, without gloss, Monochrome: face up paper exit, A4 or 8.5 x 11) 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) Black-and-white: Less than 6.0 sec. (platen mode, life size, manual density, paper feed tray /1 to /3, plain paper, without gloss, face up paper exit, A4 or 8.
PRODUCT SPECIFICATIONS CF5001 Ver.1.0 Sep. 2003 C.
CF5001 Ver.1.0 Sep. 2003 CENTER CROSS SECTION [22] [21] [1] I OUTLINE 3.
PAPER PATH CF5001 Ver.1.0 Sep. 2003 I OUTLINE 4.
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DRIVE SYSTEM DIAGRAM CF5001 Ver.1.0 Sep. 2003 I OUTLINE 5. DRIVE SYSTEM DIAGRAM 5.
CF5001 Ver.1.0 Sep. 2003 Transfer belt conveyance/pressure drive I OUTLINE 5.
DRIVE SYSTEM DIAGRAM I OUTLINE 5.3 CF5001 Ver.1.0 Sep.
CF5001 Ver.1.0 Sep.
DRIVE SYSTEM DIAGRAM 5.5 CF5001 Ver.1.0 Sep.
CF5001 Ver.1.0 Sep. 2003 Fixing drive I OUTLINE 5.
DRIVE SYSTEM DIAGRAM I OUTLINE 5.7 5.7.1 CF5001 Ver.1.0 Sep.
CF5001 Ver.1.0 Sep. 2003 Up/down wire [22] Feed roller /2 [16] Tray up drive motor /1 (M40) [23] Paper feed clutch /2 (MC9) [17] [18] Paper feed roller /1 Feed roller /1 [24] [25] Drive coupling /2 Pre-registration roller /2 [19] Paper feed clutch /1 (MC7) [26] Pre-registration clutch /2 (MC10) [20] Pre-registration roller /1 [27] Drive coupling /1 [21] Pre-registration clutch /1 (MC8) 5.7.
DRIVE SYSTEM DIAGRAM I OUTLINE 5.8 5.8.1 CF5001 Ver.1.0 Sep.
CF5001 Ver.1.0 Sep. 2003 Registration drive/loop drive [4] [3] [1] I OUTLINE 5.8.
DRIVE SYSTEM DIAGRAM ADU conveyance drive I OUTLINE 5.8.3 CF5001 Ver.1.0 Sep.
CF5001 Ver.1.0 Sep. 2003 5.8.
DRIVE SYSTEM DIAGRAM 5.9 CF5001 Ver.1.0 Sep.
CF5001 Ver.1.0 Sep. 2003 DRIVE SYSTEM DIAGRAM I OUTLINE 5.
IMAGE CREATION PROCESS CF5001 Ver.1.0 Sep. 2003 I OUTLINE 6. IMAGE CREATION PROCESS 6.1 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. Step 3 Developing process Makes an electrostatic latent image visible.
CF5001 Ver.1.0 Sep. 2003 Charging process (Step 1) The charging corona, having a gold-plated tungsten wire, is applied with a high DC voltage (minus) to negatively 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. Photosensitive drums are provided for the four colors of Y, M, C and K.
IMAGE CREATION PROCESS I OUTLINE 6.4 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 photosensitivity drum, toner is attracted to the image section on the drum by the potential difference with the developing bias and becomes visible. This process is called developing.
CF5001 Ver.1.0 Sep. 2003 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. While in the 1st transfer, the 1st transfer roller provided at the rear of the transfer belt is applied with a high DC bias voltage (positive).
IMAGE CREATION PROCESS I OUTLINE 6.6 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.
CF5001 Ver.1.0 Sep. 2003 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 process. The process to remove toner is referred to as drum cleaning. Drum cleaning is made by scraping toner adhered to the drum surface with the edge of a plate called a blade that is made of urethane rubber. [1] [3] [2] [1] [2] 6.
IMAGE CREATION PROCESS CF5001 Ver.1.0 Sep. 2003 I OUTLINE 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 transfer process. The process to remove toner is referred to as a transfer belt cleaning. A transfer belt cleaning is made by scraping toner adhered to the drum surface with the edge of a plate called a blade that is made of urethane rubber.
CF5001 Ver.1.0 Sep. 2003 IMAGE CREATION PROCESS 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. [2] [3] [4] [5] [6] [1] 8050ma1028 [1] [2] Toner collection box Transfer belt toner collection opening [4] [5] Drum /M toner collection opening Drum /C toner collection opening [3] Drum /Y toner collection opening [6] Drum /K toner collection opening 6.
CF5001 Ver.1.0 Sep.
CF5001 Ver.1.0 Sep. 2003 II SCANNER UNIT EXPLANATION 1. SCANNER Composition PS1 PS2 [7] [8] M1 CONT II UNIT EXPLANATION 1.
SCANNER CF5001 Ver.1.0 Sep. 2003 Symbol Name Function or method PS4 APS sensor /L Detects the original size in the sub-scan direction (for large size) PS3 APS sensor /S Detects the original size in the sub-scan direction (for small size) 1.2 1.2.1 Operation Home position search in the exposure unit II UNIT EXPLANATION The exposure units searches for the home position when the main switch (SW2) or the start button is turned on.
CF5001 Ver.1.0 Sep. 2003 1.2.2 SCANNER 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. In the white correction, the white standard board is read while the exposure lamp (L1) is turned on. In the black correction, the board is read while the lamp is off. ness.
SCANNER 1.2.3 CF5001 Ver.1.0 Sep. 2003 Original reading mode There are two original reading modes, the platen mode and the DF mode. The original reading is a common operation. A. When copying with the manual density setting II UNIT EXPLANATION [1] [2] [3] [4] [5] [6] [7] [1] [2] 8050ma2005 Home position PS1 [5] [6] 2nd white correction Exposure scan [3] Platen APS position [7] Home position search [4] 1st white correction B.
CF5001 Ver.1.0 Sep. 2003 1.2.4 SCANNER 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 converted to a digital signal in the CCD board (CCDB) according to directions from the overall control board (OACB). The CCD sensor includes three separate photoreceivers for the 1st colors R, G, and B. The A/D converter A.
SCANNER CF5001 Ver.1.0 Sep.
CF5001 Ver.1.0 Sep.
SCANNER 1.2.5 CF5001 Ver.1.0 Sep. 2003 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. The signal is sent via the scanner drive board (SCDB) and the overall control board (OACB) (see the AFR20 Service manual for more detailed information on the APS control by AFR-20). II UNIT EXPLANATION A.
CF5001 Ver.1.0 Sep. 2003 1.2.6 SCANNER 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 correction curve. The CPU on the image processing board (IPB) performs the selection. A.
SCANNER CF5001 Ver.1.0 Sep. 2003 D.
CF5001 Ver.1.0 Sep. 2003 WRITE 2. WRITE 2.1 Composition CONT CLOCK LOCK TEMP.ER [23] [24] [25][26] [27] [28] [29] [30] [31] PRCB [1] [22] [21] [20] [19] [18] [17] [16] [2] [6][5][4][3] [15] [14] [13] [12] [11] [10] [9] [8] [7] Symbol [1] [2] IPB 8050ma2010 Name Cylindrical lens 1 Polygon mirror Function or method Corrects the laser path against the angle error in the polygon mirror Scans the laser light Hexahedron, 51,968.
WRITE CF5001 Ver.1.0 Sep.
CF5001 Ver.1.0 Sep. 2003 2.2 Operation 2.2.1 Image writing WRITE 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). The converted YMCK signals are divided to the laser drive board /Y, /M, /C, /K (LDB Y, M, C, K) by the IPB.
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.
CF5001 Ver.1.0 Sep.
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). They are transferred on the front side and rear side in a line. These locations are corresponding to the color registration sensor /F (PS8) and the color registration sensor /R II UNIT EXPLANATION (PS9).
CF5001 Ver.1.0 Sep. 2003 WRITE 2. Detecting the color registration mark PS8 and PS9 detect the edge of the color registration mark " nals. The edge detection for one " " for each color and convert to digital sig- " is performed at four positions.
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 detection timing differences for each color. It is called the color drift amount due to the angle of the write unit.
CF5001 Ver.1.0 Sep. 2003 DRUM UNIT 3. DRUM UNIT Composition [26] M14 [25] [24] [1] PS60 [23] [2] PS61 [22] M15 [3] [4] U V W DRDB/Y II UNIT EXPLANATION 3.
DRUM UNIT CF5001 Ver.1.0 Sep.
CF5001 Ver.1.0 Sep.
DRUM UNIT Symbol PS66 CF5001 Ver.1.0 Sep.
CF5001 Ver.1.0 Sep. 2003 3.2 DRUM UNIT Operation 3.2.
DEVELOPING UNIT CF5001 Ver.1.0 Sep. 2003 4. DEVELOPING UNIT 4.
CF5001 Ver.1.0 Sep.
DEVELOPING UNIT 4.2 4.2.1 CF5001 Ver.1.0 Sep. 2003 Operation 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.
CF5001 Ver.1.0 Sep. 2003 4.2.4 DEVELOPING UNIT 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. Durability of the developer A.
TRANSFER BELT UNIT CF5001 Ver.1.0 Sep. 2003 5. TRANSFER BELT UNIT 5.
CF5001 Ver.1.0 Sep.
TRANSFER BELT UNIT 5.2 5.2.1 CF5001 Ver.1.0 Sep. 2003 Operation 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 rollers /Y, /M and /C of these rollers operate as a unit (color 1st transfer roller assembly).
CF5001 Ver.1.0 Sep. 2003 5.2.2 TRANSFER BELT UNIT Image correction unit A.
TRANSFER BELT UNIT 5.2.3 CF5001 Ver.1.0 Sep. 2003 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. II UNIT EXPLANATION The DC bias value of the 1st transfer roller changes according to the following conditions: • Process speed • Black-and-white mode or color mode • Humidity • No.
CF5001 Ver.1.0 Sep. 2003 TONER SUPPLY 6. TONER SUPPLY 6.
TONER SUPPLY CF5001 Ver.1.0 Sep. 2003 Symbol Name [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. 460 g Toner level detection sensor /Y Detection of the toner level in the toner hopper section /Y (TLD Y) (Detection is made at the remaining quantity of about 50 g) Toner supply motor /Y (M49) Toner bottle capacity: Approx.
CF5001 Ver.1.0 Sep. 2003 6.2.3 TONER SUPPLY 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.
TONER COLLECTION CF5001 Ver.1.0 Sep. 2003 7. TONER COLLECTION 7.
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PAPER FEED TRAY /1 TO /3 CF5001 Ver.1.0 Sep. 2003 8. PAPER FEED TRAY /1 TO /3 8.
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PAPER FEED TRAY /1 TO /3 II UNIT EXPLANATION Symbol CF5001 Ver.1.0 Sep.
CF5001 Ver.1.0 Sep. 2003 8.2.2 PAPER FEED TRAY /1 TO /3 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. As a result, the wire is wound around the drive pulley and the up/down plate goes up. When the tray upper limit sensor /1 (PS30) detects the upper limit of paper, the M40 turns off.
PAPER FEED TRAY /1 TO /3 8.2.4 CF5001 Ver.1.0 Sep. 2003 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). . II UNIT EXPLANATION Paper size Paper size /S Paper size /L Paper size VR 13 x 19R { { 333.2 12.6 x 18R/17.7R { { 317.
CF5001 Ver.1.0 Sep. 2003 BY-PASS FEED 9. BY-PASS FEED 9.
BY-PASS FEED 9.2 9.2.1 CF5001 Ver.1.0 Sep. 2003 Operation 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 II UNIT EXPLANATION weight. 9.2.2 Paper feed control [1] Paper feed motor (M41) Pick-up solenoid/BP (SD5) Paper feed clutch/BP (MC6) By-pass conveyance sensor (PS26) 8050ma2021 [1] 9.2.
CF5001 Ver.1.0 Sep. 2003 VERTICAL CONVEYANCE 10. VERTICAL CONVEYANCE 10.1 Composition M41 DRIVE CLOCK CW LOCK H/L II UNIT EXPLANATION MC13 PRCB [1] [2] PS50 PS51 8050ma2050 Symbol Name Function or method [1] Vertical conveyance door Cleaning paper jam in the vertical conveyance section [2] Intermediate conveyance roller /1 Paper conveyance of the trays /2 and /3 Paper feed motor Intermediate conveyance clutch /1 See "8. Paper feed tray 1 to 3.
REGISTRATION/ADU/REVERSE/PAPER EXIT CF5001 Ver.1.0 Sep. 2003 11. REGISTRATION/ADU/REVERSE/PAPER EXIT 11.
CF5001 Ver.1.0 Sep. 2003 Symbol [6] [7] REGISTRATION/ADU/REVERSE/PAPER EXIT Name Function or method Decurler roller Paper conveyance and paper curl correction in the reverse section Fixing section Motor drive Fixing of paper that has been transferred See "12. Fixing Section.
REGISTRATION/ADU/REVERSE/PAPER EXIT Symbol M30 M31 CF5001 Ver.1.0 Sep.
CF5001 Ver.1.0 Sep. 2003 Symbol PS24 PS27 REGISTRATION/ADU/REVERSE/PAPER EXIT Name Function or method 2nd transfer HP sensor 2nd transfer roller home position detection Intermediate conveyance sen- Photo sensor Detection of paper at the intermediate conveyance roller /2 sor /1 exit Photo sensor PS28 Intermediate conveyance sensor /2 Detection of paper at the intermediate conveyance roller /3 exit PS55 Conveyance lever sensor ADU open/close detection Photo sensor 11.2 Operation 11.2.
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.
CF5001 Ver.1.0 Sep. 2003 REGISTRATION/ADU/REVERSE/PAPER EXIT C.
REGISTRATION/ADU/REVERSE/PAPER EXIT CF5001 Ver.1.0 Sep. 2003 D.
CF5001 Ver.1.0 Sep. 2003 11.2.2 REGISTRATION/ADU/REVERSE/PAPER EXIT 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.
REGISTRATION/ADU/REVERSE/PAPER EXIT CF5001 Ver.1.0 Sep. 2003 B. Reverse/exit operation (single sided 2 copies) [1] Paper feed motor (M41) Registration roller motor (M30) F II UNIT EXPLANATION Fixing motor (M29) R Reverse/exit motor (M33) F H M L R L M H Reverse/exit solenoid (SD4) Fixing exit sensor (PS17) Reverse/exit sensor (PS19) Paper exit sensor (PS13) V TOP [2] [1] START button (ON) [2] 1st paper exit 11.2.
CF5001 Ver.1.0 Sep. 2003 11.2.4 REGISTRATION/ADU/REVERSE/PAPER EXIT 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.
REGISTRATION/ADU/REVERSE/PAPER EXIT CF5001 Ver.1.0 Sep. 2003 B.
CF5001 Ver.1.0 Sep. 2003 11.2.5 REGISTRATION/ADU/REVERSE/PAPER EXIT 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. A. ADU pre-registration path [3] [4] [5] [1] [1] 8050ma2032 ADU pre-registration loop [4] ADU pre-registration roller [2] ADU conveyance roller /2 [5] Loop roller [3] ADU pre-registration sensor (PS23) B.
REGISTRATION/ADU/REVERSE/PAPER EXIT 11.2.6 CF5001 Ver.1.0 Sep. 2003 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.
CF5001 Ver.1.0 Sep. 2003 11.2.7 REGISTRATION/ADU/REVERSE/PAPER EXIT 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 [3] II UNIT EXPLANATION [6] [4] [5] [2] [1] [1] [2] Release Pressure [4] [5] Cam Pressure arm [3] Transfer belt unit [6] 2nd transfer roller /L 8050ma2036 B.
FIXING UNIT CF5001 Ver.1.0 Sep. 2003 12. FIXING UNIT 12.
CF5001 Ver.1.0 Sep.
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. A. Fixing drive operation II UNIT EXPLANATION The driving force of the fixing roller (M29) [1] is transmitted through the gear to the fixing roller [2] and the fixing paper exit roller [3].
CF5001 Ver.1.0 Sep. 2003 12.2.2 FIXING UNIT 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]. There is a one-way clutch [4] provided between M29 force is limited only to the cam.
FIXING UNIT 12.2.3 CF5001 Ver.1.0 Sep. 2003 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. II UNIT EXPLANATION 12.2.
CF5001 Ver.1.0 Sep. 2003 INTERFACE 13. INTERFACE [1] [2] [3] [4] [5] 8050ma2037 Symbol [1] [2] Name Video interface for controller Serial port (RS-232C) Function or method For controller For RD-mode communications D-SUB 9-pin connector [3] [4] Parallel port (based on IEEE 1284) For ISW of copier Serial port (USB Type B) 36-pin centronics connector For ISW of copier Ver.1.1 [5] RJ45 Ethernet connector Port for network 2-65 II UNIT EXPLANATION 13.
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. A. Explanation of the operation The charging amount of toner changes depending on the environmental factors such as the temperature II UNIT EXPLANATION and humidity.
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.
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.
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 SW1 CBR1 AC(N) AC(H) CBR2 ACDB 8050ma2038 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. A.
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 SW2 5VDC REMOTE DCPS1 OACB 3.
CF5001 Ver.1.0 Sep. 2003 OTHER CONTROLS 15.
OTHER CONTROLS CF5001 Ver.1.0 Sep. 2003 15.4 Operation board control 15.4.
CF5001 Ver.1.0 Sep. 2003 OTHER CONTROLS 15.5 Counter control 15.5.1 Counter composition OACB OB1 C(BK) C(K) OPTION COIN VENDOR (SERIAL) OPTION [1] PS13 8050ma2042 PRCB Symbol Name Function or method [1] Coin vendor (serial) Copying is controlled depending on the presence of a coin.
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. II UNIT EXPLANATION F. Signals in serial connection Connector Pin No.
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. At this time, the switch is performed during JOB, so there is a time lag A.
CF5001 Ver.1.0 Sep.
Copyright 2003 KONICA MINOLTA BUSINESS TECHNOLOGIES, INC. Printed in Japan Use of this manual should be strictly supervised to avoid disclosure of confidential information.
