User manual KONICA MINOLTA DB-608 DB208/DB608 SERVICE MANUAL

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Manual abstract: user guide KONICA MINOLTA DB-608DB208/DB608 SERVICE MANUAL

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[. . . ] SERVICE MANUAL Model DB-208/608 SECOND EDITION NOVEMBER 2000 CSM-DB208/608 KONICA BUSINESS TECHNOLOGIES, INC. DB-208/608 SERVICE MANUAL NOVEMBER 2000 SECOND EDITION IMPORTANT NOTICE Because of the possible hazards to an inexperienced person servicing this equipment, as well as the risk of damage to the equipment, Konica Business Technologies strongly recommends that all servicing be performed by Konica-trained service technicians only. Changes may have been made to this equipment to improve its performance after this service manual was printed. Accordingly, Konica Business Technologies, Inc. , makes no representations or warranties, either expressed or implied, that the information contained in this service manual is complete or accurate. It is understood that the user of this manual must assume all risks or personal injury and/or damage to the equipment while servicing the equipment for which this service manual is intended. Corporate Publications Department © 2000, KONICA BUSINESS TECHNOLOGIES, INC. [. . . ] Output signals (1) M402 DRIVE (PFUDB (PFU) to M402) This is the ON/OFF control signal for M402. [L]: ON [H]: OFF DB MACK DB SRXD 5VDC SGND PS403 PS403 SW401 MAIN BODY SW402 SW403 SW404 PFUDB(UPPER) The paper tray is raised by transmitting the M402 (up/ down) driving force to the paper lifting lever. The M402 is driven by the PFUDB (PFU) (PFU drive board (PFU)) and controlled by the PFUDB (U) in the main body. 1. Operation The tray is raised when the M402 turns ON after the SW401, 402, 403 or 404 (paper size-detect) turn ON. After the tray is raised, the PS403 (upper limit detect (PFU)) detects the upper limit of the paper in the tray. When paper is fed the PS403 turns ON and the tray is raised when the M402 turns ON again. The paper tray is lowered mechanically. 2-6 DB-208/608 Paper Size Detection Control 24VDC(DCPS1) PGND(DCPS1) 5VDC(SCDB) SGND(SCDB) DB MTXD(SCDB) (SCDB) (SCDB) DB SACK(SCDB) DB MACK DB SRXD PAPER SIZE DETECT SWITCH MAIN BODY PFUDB(UPPER) The PFUDB (PFU) (PFU drive board (PFU)) is fitted with a series of tact switches for detecting paper size. This informs the main body of the paper size in each tray. 1. Operation Each tray has a series of actuators that are operated by the paper guides. When each tray is inserted, these projections turn the tact switches on the PFUDB (PFU) OFF and ON. The PFUDB (PFU) determines the paper size of the PFU from the ON/ OFF combinations. 2-7 DB-208/608 1500-SHEET PAPER TRAY UNIT Composition Wire D Tray Rear edge stopper Side guide Wire A Wire C Up/down motor Wire B Coupling gear Drive AUX spring Drive pulley AUX wire Front cover Mechanism Mechanisms Paper stack Paper lifting *1 Tray loading Method Tray 1 Wire driven Front loading *1: Paper lifting The paper tray (LCT) is suspended using four Up/ Down drive wires (A, B, C and D). When paper is loaded into the tray, the tray moves down due to the weight of the paper. The weight of the paper is balanced by the tension of the drive auxiliary spring. When the paper tray (LCT) is inserted, the up/down motor (M403) rotates, winding the wires on the drive reel and raising the tray. When the paper tray is withdrawn from the frame, the tray drive section and the coupling separate from each other. This causes the tray to move down to the position where the paper is balanced by the tension of the drive auxiliary spring. 2-8 DB-208/608 1500-Sheet Paper Feed Tray and No-Paper Detection Control 24VDC(DCPS1) PGND(DCPS1) 5VDC(SCDB) SGND(SCDB) DB MTXD(SCDB) (SCDB) (SCDB) DB SACK(SCDB) (PRDB) DB MACK DB SRXD MPS DATA M401 CONT M401 CLK M401 H/L 24VDC M401 CW/CCW PGND SGND 5VDC M401 PS401 PS401 MAIN BODY 24VDC SD402 DRIVE PFUDB(PFU) PS404 24VDC PS404 5VDC SGND PS404 SD402 SD402 DRIVE PFUDB(LCT) Paper is fed by transmitting the M401 (paper feed) driving force to the paper feed roller and feed roller through SD402 (paper feed (LCT)). M401 is driven by the PFUDB (PFU drive board (PFU)) and controlled by the paper feed drive board PFUDB (PFU) in the main body. SD402 is driven by the PFUDB (PFU drive board (LCT)) and controlled by the PFUDB (PFU). b. 1. Operation a. Initial operation when the power is switched ON (1) When the power is switched ON, M401 goes ON for the specified period. Reason: This is to prevent the paper from being fed from all of the paper trays at the same time when the Start button is pressed, as a result of the the ratchet claw of SD402 being disengaged due to an impact when the machine was being transported. Operation when copying Paper feed for the first sheet starts a specified time after the start button is turned ON. The paper feed operation starts when the M401 and SD402 turn ON. The M401 turns OFF a specified time after the PS401 (paper feed detect) detects the leading edge of the page. SD402 turns OFF a specified time after turning ON. Paper feed for the second and subsequent sheets starts specified time after the SD402 for the previous page turns ON. [. . . ] Paper detecting actuator/right Paper detecting actuator/right Paper detecting actuator/upper . 3 29 7 21 9 11 23 25 13 27 13 27 13 27 13 27 13 27 11 25 26 7 20 21 18 13 18 13 5 5 4 4 15 15 3 3 2 2 26 26 R RF plate . Rocking gear/C (Z=42) Rocking gear/C (Z=42) Rocking shaft . 29 9 23 29 29 9 23 11 25 11 25 11 25 13 27 3 4 4 10 11 10 10 27 27 20 20 16 16 14 14 S Shaft PS part . [. . . ]

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