User manual KONICA MINOLTA DF-312 DF312 SERVICE MANUAL

[. . . ] SERVICE MANUAL Model DF-312 SEPTEMBER 1999 CSM-DF-312 KONICA BUSINESS TECHNOLOGIES, INC. DF-312 SERVICE MANUAL September 1999 Used on Model 7065 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 © 1999, KONICA BUSINESS TECHNOLOGIES, INC. [. . . ] This causes the paper feed roller to be lowered, applying pressure to the original. After the specified time, M302 and CL301 go OFF and when another specified time goes by, SD302 goes OFF, but the pressure on the original is maintained until CL301 goes ON. 12 DF-312 c. Paper feed operation When CL302 (original feed) goes ON, the driving force of M302 is transmitted to the paper feed roller and the separation roller. CL302 goes ON at the same time as M302 performs forward rotation. When M302 switches from forward to reverse rotation, paper feed starts. When PS306 (original registration) goes ON, the reverse rotation of M302 is switched to normal rotation after the specified time. Pre-feed of first sheet Pre feed operation starts by the forward rotation of M302. This causes the original to be moved to the conveyance roller. M301 (original conveyance) has already turned ON after the specified time from when CL301 went ON, and conveys the original which reaches the conveyance roller to the read position. As a result, when PS308 (original conveyance) detects the leading edge of the original and turns ON, normal rotation of CL302 and M302 go OFF. After the specified time, starting from this point, M301 slows down and starts scanning. Pre-feed of second and further sheets The original, which started pre-feed from the normal rotation of M302, is conveyed to the conveyance roller as it is if the previous original has been scanned. If the original is under scan, M302 will rotate in the normal direction again at the same time as when the scan is finished, and feed the original to the conveyance roller after turning M302 OFF and stopping it temporarily. M301 will increase the rotation speed of the conveyance roller at the time when the previous original has been scanned. The normal rotation of CL302 and M302 will go OFF when PS308 detects the leading edge of the original and goes ON. Starting from this point, M301 will slow down after the specified time and starts scanning. Scanning operation (except final original) After the specified time from when M301 starts to decrease its speed, the original pass over the slit glass area of the main body, where scanning is performed. When PS306 detects the trailing edge of the original that is being scanned and goes OFF, CL302 again goes ON and the feed operation of the next original starts. From the time when the original scan is finished, M301 increases the rotation speed of the conveyance roller. Scanning operation (final original) When PS301 (final original detection) goes OFF, M301 judges that the original currently being scanned is the last one. When PS307 (original exit detect) goes OFF, M301 also goes OFF after the specified time. Original pressure release operation When M301 completes the scanning operation for the last original and goes OFF, CL301 and M302 (reverse rotation) go ON which causes the original pressure to be released. [. . . ] 17 17 17 19 14 16 15 14 J Jam dial . 15 24 Model DF-312 1st Edition Konica Business Technologies, Inc. Page 25 September, 1999 PART DESCRIPTION Pickup roller shaft . Pressure roller fulcrum shaft Pressure roller spring . 15 15 9 11 19 11 11 11 13 13 3 3 13 13 9 19 15 9 13 19 19 REF. [. . . ]