User manual KONICA MINOLTA DF-314 DF314 SERVICE MANUAL

[. . . ] SERVICE MANUAL Model DF-314 SECOND EDITION NOVEMBER 2000 CSM-DF314 KONICA BUSINESS TECHNOLOGIES, INC. DF-314 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. [. . . ] Refer to "ORIGINAL FEED/REVERSAL/ORIGINAL EXIT SECTION/Original size detection control" for size detection operation. Reversal roller Conveyance roller 5 DF-314 This page left blank intentionally. 6 DF-314 EXTERNAL SECTION Composition Original feed tray Original exit tray Jam access cover Mechanisms Mechanism Jam release* System Jam access cover Reversal guide open/close lever RADF Main body open/close Knob Exit-guide open/close lever Platen separation lever * Jam removal If a jam occurs at the original feed, open the Jam access cover and turning the knob closer to you withdraw the sheet. If a jam occurs in the reversal section, open the reversal guide with the reversal guide open/close lever and withdraw the sheet. Reversal guide open/close lever Reversal guide Jam access cover If a jam occurs in the conveyance section, open the exit tray (using the platen separation lever) and the exit guide (using the exit-guide open/ close lever) and withdraw the sheet. Exit guide Exit guide open/close lever Platen separation lever Original exit tray Knob 7 DF-314 ORIGINAL FEED/REVERSAL/ORIGINAL EXIT SECTION Composition Original feed unit Original feed tray Jam access cover Original exit tray Original conveyance motor (M302) Original reversal motor (M303) Exit SD (SD303) Roller pressure SD (SD302) Original feed motor (M301) Mechanisms Mechanism Original feed Double feed prevention System Feed roller Separation roller Double feed prevention Roller Original conveyance rollers Reversal guide Original exit guide Original reversal motor (M303) Reversal guide Reversal guide Original conveyance Original reverse and feed *1 Original exit path section *2 *1: Reversed original feed During double-side copying, in order to reverse the original the paper feed path is switched by the reversal guide, the paper is conveyed to the reverse mechanism and is reversed. 8 DF-314 *2: Original exit path switching In the case of a two-sided copy, the paper exit guide changes over the paper feed path so as to either exit the original directly, or feed the original to the reversal section in order to read it once again. Original Feed/Conveyance/Scan Control 24VDC 24VDC M301 OUT A M301 OUT A M301 OUT B M301 OUT B 24VDC 24VDC M302 OUT A M302 OUT A M302 OUT B M302 OUT B 5VDC PS301 SGND M301 M302 Exit guide M TXD M REQ S ACK M ACK S TXD S REQ VV PS301 5VDC PS303 SGND PS303 Exit guide Exit SD (SD303) 24VDC 24VDC PGND PGND 5VDC SGND SGND 5VDC 5VDC PS311 SGND PS311 5VDC PS312 SGND PS312 MAIN BODY DF CB Original feed is achieved by the transmission of the M301(original feed motor) drive power to the original feed roller, separation roller and registration roller. Original conveyance is achieved by the transmission of the M302 (original conveyance motor) drive power to the original conveyance roller. The M301 and M302 are controlled by the DFCB (RADF control board). 9 DF-314 1. Operation Original feed Original feed is started by the transmission of the M301 drive power to the original feed roller, separation roller and paper lift-up plate. 2. a. Signals Input signals (1) PS301(PS301 -> DF CB) Original feed tray no-paper detection signal [L] : Original b. 1st original pre-feed When the copy button is pressed, the M301 starts original pre-feed, and when the conveyed original arrives at PS311, M301 stops temporarily after a specified time. M301 then rotates in reverse, turning the registration roller so that feeding starts again. A predetermined time interval after PS311 turns OFF, M301 also turns OFF. [H] : No original (2) PS303(PS303 -> DF CB) Original exit section original detection signal [L] : No original [H] : Original (3) PS311(PS311 -> DF CB) Original conveyance roller entrance original detection signal [L] : No original [H] : Original c. 2nd original pre-feed When there is still an original in the original feed tray, M301 starts after a specified time after PS311 has turned OFF, and starts the pre-feed from after the second sheet. original pre-feed. (4) PS312(PS312 -> DF CB) Original detection signal from detector in front of scan position [L] : No original [H] : Original d. Scanning operation (except last original) When the original arrives at PS311, M302 starts after a specified time has elapsed and the original is conveyed to the read section. Scanning of the original is achieved when the original passes over the surface of the slit glass of the main body optical section. When the original arrives at PS312, scanning is started after a specified time has elapsed, and when PS312 turns OFF after the original has passed, scanning is stopped after the lapse of a fixed period of time. (5) M TXD (MAIN BODy -> DF CB) Serial data line; informs RADF of the operating state of the main body's CB (6) M REQ (MAIN BODY -> DF CB) Transmission request signal from main body to RADF (7) S ACK (MAIN BODY -> DF CB) Transmission OK signal from main body to RADF e. Scanning operation (last original) During the scanning operation, when PS301(no original detect PS) turns OFF, the original currently being scanned is judged to be the last original. When the last original has passed PS311, M301 turns OFF after the lapse of a fixed period of time, and when the original has passed PS303 (original exit PS), M302 turns OFF after a specified time. 10 DF-314 b. Output signals ­ (1) M301 OUT A, M301 OUT A , M301 OUT B, ­ M301 OUT B (DF CB -> M301) M301 drive control signal Original Exit/Reversal and Conveyance Control 24V 0V 24VDC 24VDC M301 OUT A M301 OUT A M301 OUT B M301 OUT B 24VDC 24VDC M302 OUT A M302 OUT A M302 OUT B M302 OUT B 24VDC 24VDC M303 OUT A M303 OUT A M303 OUT B M303 OUT B M301 ­ (2) M302 OUT A, M302 OUT A , M302 OUT B, ­ M302 OUT B (DF CB -> M302) M302 drive control signal M302 M303 24V 0V M TXD M REQ S ACK M ACK S TXD S REQ VV 24VDC SD302 SD302 24VDC SD303 SD303 (3) M ACK (DF CB -> MAIN BODY) Transmission OK signal from RADF to main body 24VDC 24VDC PGND PGND 5VDC SGND SGND 5VDC 5VDC PS311 SGND PS311 (4) S TXD (DF CB -> MAIN BODY) Serial data line; informs the main body's CB of the RADF operating state 5VDC PS312 SGND PS312 (5) S REQ (DF CB -> MAIN BODY) Transmission request signal from RADF to main body. MAIN BODY DF CB The exit guide used in exit path switching is driven by the SD303 (exit SD). Reversal conveyance drive in double-side copy mode is performed by the M303 (original reversal motor). The reversal roller pressure/freeing used in reversal original feed is performed by the SD 302 (roller pressure SD). M303, SD302 and SD303 are controlled by the DF CB (RADF control board). 11 DF-314 1. Operation Original exit operation During single side copying and face side copying in double-side copying, the exit guide is raised because SD303 is OFF. For this reason, an original which has been read is conveyed to the exit section. 2. a. Signals Output signals ­ (1) M301 OUT A, M301 OUT A , M301 OUT B, ­ M301 OUT B (DF CB -> M301) M301 drive control signal b. Reversal original exit operation During back side copying in double side copying, the original is conveyed to the scanning section by reverse rotation of M303 and nomal rotation of M302. When PS312 turns ON, SD302 turns OFF, and reversal roller paper pressure conveys the freed original to the reversal section. 24V 0V (2) SD302 (DF CB -> SD302) SD302 drive control signal [L] : ON c. Reversal original feed operation After PS312 has detected the rear edge of the original, SD302 turns ON after a specified time has elapsed and the reversal roller applies pressure (seizes, pinches) to the original. After that, M303 stops, but then immediately reverses and starts the original feed operation of the original face side scan. [H] : OFF (3) SD303 (DF CB -> SD303) SD303 drive control signal [L] : ON [H] : OFF d. Pre-feed operation of next original when reading back side of original PS311 turns OFF once the first original has passed, and after a specified period of time has elapsed, starts the pre-feed operation for the 2nd. original has arrived at PS311, M301 (original feed motor) stops. e. Overlap control When scanning of the back side of the first original sheet has been completed and the leading edge of the original fed from the reversal section reaches PS312, M301 turns ON and feeding of the second original starts. At this time, the SD302 goes OFF, causing the pressure on the reversal roller and the paper exit roller to be released. [. . . ] Driving reverse belt (L=60/96) 17 11 5 5 5 5 13 13 9 7 11 5 5 11 5 12 4 15 20 13 29 23 15 36 25 7 23 1 11 8 J Jam handling belt (L=66) . Jam handling knob (Z=17) Jam handling pulley (Z=34) Jam release arm/F . Conveyance driven spring/A Conveyance driven spring/B Conveyance driving belt (L=204) . Conveyance driving roller/A Conveyance driving roller/B Conveyance guide cam assembly . [. . . ]