User manual KONICA MINOLTA DF-315 DF315 SERVICE MANUAL

[. . . ] SERVICE MANUAL Model DF-315 NOVEMBER 2000 CSM-DF315 KONICA BUSINESS TECHNOLOGIES, INC. DF-315 SERVICE MANUAL NOVEMBER 2000 Used on Konica Model 7045 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. [. . . ] (9) DSR (MAIN BODY to DFCB) Send enable from main body to RADF. (10) RTS (MAIN BODY to DFCB) Send request from main body to RADF. 24V 0V (2) M302 DRIVE 1, 2 (DFCB to M302) M302 (original conveyance) drive signal. M302 rotation direction is controlled by switching the current direction of these two signals. State M302 DRIVE 1 Forward rotation H Reverse rotation L Stop L M302 DRIVE 2 L H L (3) CL301 DRIVE (DFCB to CL301) CL301 (original pick-up) ON/OFF drive signal [L]: CL301 ON [H]: CL301 OFF (4) CL302 DRIVE (DFCB to CL302) CL302 (original feed) ON/OFF drive signal [L]: CL302 ON [H]: CL302 OFF (5) DF TXD (DFCB to MAIN BODY) Serial data line for transmitting operation status informa- tion from RADF to main body CB (control board). (6) DTR (DFCB to MAIN BODY) Send request from RADF to main body. (7) CTS (DFCB to MAIN BODY) Send enable from RADF to main body. (8) VALID (DFCB to MAIN BODY) Image forming start signal. 12 DF-315 Paper Exit/Reverse Conveyance Control 24VDC 24VDC M301 DRIVE A M301 DRIVE A M301 DRIVE B M301 DRIVE B 1. a. Operation Sensor adjustment when the power is ON. When SW2 (sub power) is ON, a sensitivity of PS309 (original reverse detect) is adjusted automatically. However, if the RADF open/close cover is open or an original is in the inside of the RADF, there will be no automatic adjustment. Paper exit operation In single-sided copy mode and when copying the reverse side of a sheet in duplex copy mode, SD301 is OFF and the flapper is closed. The original is therefore conveyed to the paper exit section after scanning. Reversal paper exit operation When copying the first side of a sheet in duplex copy mode, at the specified time after M301 (original conveyance) goes ON and scanning starts, SD301 goes ON and the flapper opens. This causes the original to be sent to the reversal section after scanning. At the same time as SD301 goes ON, M302 (original feed) starts reverse rotation and the drive force is transmitted to the reversal roller. When PS309 detects the leading edge of the original and goes ON, the SD302 goes ON after the specified time and applies pressure to the pressure pulley. As a result, the original which has been conveyed to the reversal section is caught between the reversal roller and pressure pulley, and conveyed to the inside of the reversal section. Reversal feed operation When PS309 detects the trailing edge of the original and goes OFF, both the M301 and M302 go OFF after the specified time, and conveyance operation of the original is stopped. After a predetermined OFF interval, M302 starts reverse rotation and feeds the original to the conveyance roller side of the reversal section. At this time, PS309 again goes ON and SD302 goes OFF after the specified time. M302 goes OFF after the specified time from PS309 goes OFF. Pre-feed operation of next original when reading back side of original When PS309 goes OFF, M301 and M302 start forward rotation after the specified time, and next original pre-feed is carried out. M301 b. M302 DRIVE 1 M302 DRIVE 2 M302 PS304 5VDC PS304 SGND PS306 SGND PS306 5VDC c. PS307 5VDC SGND PS307 PS308 5VDC PS308 A PS308 B SGND 24VDC PGND PGND SGND DF TXD DF RXD CTS DSR RTS DTR VALID 5VDC PGND 24VDC 24VDC d. MAIN BODY DFCB Paper path switching in the exit area is carried out by solenoid SD301 (flapper) which operates a flapper. In duplex copy mode, the pressure pulley in the reversal section is operated by the SD302 (original press). SD301 and SD302 are controlled by the DFCB (RADF control board). e. 13 DF-315 2. [. . . ] 7 7 7 23 9 11 14 3 20 2 24 32 J Joint . 15 7 24 1 Model DF-315 1st Edition Konica Business Technologies, Inc. Page 25 November, 2000 PART DESCRIPTION Pick-up holder . Pressure roller fulcrum shaft Pressure roller spring . 15 15 15 15 21 11 19 11 11 11 3 3 13 13 13 13 15 19 9 9 13 19 19 REF. [. . . ]