User manual CANON LBP-1120

[. . . ] LBP-1120 SERVICE MANUAL REVISION 0 JULY. 2002 COPYRIGHT © 2002 CANON INC. FY8-13HT-000 CANON LBP-1120 REV. 0 MAY. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON) Application This manual has been issued by Canon Inc. for qualified persons to learn technical theory, installation, maintenance, and repair of products. [. . . ] The fixing film is a cylindrical polyamide film. The surface is coated with fluorine to prevent offset. 2 - 29 CHAPTER 2 5. Photosensitive Drum Cleaning Stage At the photosensitive drum cleaning stage, the photosensitive drum surface is cleaned in preparation for the next print operation. Step 7: Photosensitive Drum Cleaning Cleaner container Cleaning blade Photosensitive drum Sweeper strip Figure 2-4-13 Prior to the next printing, the residual toner on the drum surface is scraped away by the cleaning blade to clean the drum surface. The removed toner is collected into the cleaner container. 2 - 30 CHAPTER 2 V. Outline The printer is equipped with two pickup sources, the multi-purpose tray and manual feed slot. Whether or not the multi-purpose tray and the manual feed slot are loaded with paper is detected by the paper-out sensor (PS003). The main motor (M001) starts rotating after about 0. 5 seconds from the time the engine controller receives a pickup command from the interface controller. When the printer enters an initial rotation ready state (See Note), the pickup solenoid (SL001) is turned ON for 0. 5 seconds. The main motor rotates the pickup roller, and the pickup roller's rotational force moves the pick cam. When the claw of the pickup cam is unhooked from the lifting plate, the plate is lifted by the spring force with print paper on it. A sheet of the paper is picked up by the pickup roller and fed to the printer. The paper pickup timing is the same for the multi-purpose tray and the manual feed slot. If both of the pickup sources are loaded with paper, priority is given to the manual feed slot. Engine Controller PCB [1] :Paper-outsensor [2] :Paper top sensor [3] :Paper delivery sensor [4] :Pick-up solenoid PAPER DELIVERY SENSOR signal (POSNS) MAIN MOTOR DRIVE signal (MA, /MA, MB, /MB) PICK-UP SOLENOID DRIVE signal (CPUD) PAPER TOP SENSOR signal (/PISNS) Multipurpose tray SL001 Face-down delivery roller Face-down delivery Pick-up roller Photosensitive drum [4] Deflector Fixing unit PS002 [2] Transfer charging roller Feed roller Main motor M001 PS001 [1] Lifting plate Face-up delivery PS201 Fixing unit delivery roller [3] Figure 2-5-1 2 - 31 PAPER-OUT SENSOR signal (PAPERSNS) Manual feed slot CHAPTER 2 After the specified period of time from the time the paper reaches the paper top sensor (PS002), the engine controller sends the /BD signal to the interface controller. The interface controller sends the VIDEO signal to the engine controller based on the /BD signal. This matches the leading edge of the image with that of print paper. The paper goes through the transfer, separation, fixing, and delivery blocks, and is delivered to the faceup delivery slot or to the facedown tray. Turning the delivery lever up and down switches into the faceup delivery (turn down the lever) or facedown delivery (turn up the lever). There are two photointerrupters (PS002 and PS201) on the paper path. These photointerrupters detect paper's reach and pass. If the paper does not reach or pass the sensors within the specified period of time, the CPU on the engine controller determines a paper jam and notifies it to the interface controller. In this printer, print paper is loaded from the top of the printer. [. . . ] Action: When you use a printer other than LBP-1120, make sure to switch to the driver to which you are to connect. Message area: Clear Paper Jam Error message area: 1. Open cover 2. Remove toner cartridge 3. Remove jammed paper Content: A paper jam has occurred in the printer. Action: Follow the instructions indicated in the Error message area. Message area: Clear Paper Jam Error message area: 4. Replace toner cartridge 5. Close cover Content: A jam has occurred and then the cartridge cover has been opened. Action: Follow the instructions indicated in the Error message area. [. . . ]