Printer cables F Maximum length for parallel cable is 15 feet. (some say 10) F 25 -pin DB male connector on cable connects to DB female connector on motherboard F 36 -pin Centronics connector on printer end of connecting cable
LPT Ports
Parts of a laser printer F Photosensitive drum- reacts to light – holds a charge except where it is exposed to light F Paper transport- 4 types of rollers that move paper through printer – This is where most paper jams occur! F Primary corona- main corona – located inside toner cartridge – uniformly charges drum to -600 V
Parts cont. F Transfer corona- transfers image from drum to paper – transfer corona charges the paper – the charged paper pulls toner from drum to paper F Fusing roller- permanently melts toner to page – this is why laser printer pages are hot F Controller- includes printer RAM F Power supply- high-voltage AC and DC
Steps in laser printing F Cleaning – Before page is printed, remnants of previous print are swept away – Rubber blade sweeps left-over toner away – Fluorescent lamp removes any remaining electrical charge on drum F Conditioning – The primary corona (AKA main corona) wire uniformly charges drum to -600 V
Steps cont. F Writing – image of page is created on drum – where laser beam contacts drum, the charge is reduced to -100 V from -600 V – the controller loads sheet of paper to the registration roller of the paper transport system F Developing – Creating print image on drum – the iron particles in toner cartridge are attracted to the areas of drum exposed by laser
Steps cont. F Transferring – image transferred to paper – sheet of paper at registration roller is given a positive charge – negatively charged toner on drum is attracted onto positively charged paper F Fusing – fusing rollers apply heat and pressure to toner – toner melts and permanently bonds to paper
Remember…steps of laser print F 1. Cleaning F 2. Conditioning F 3. Writing F 4. Developing F 5. Transferring F 6. Fusing California Cows Won’t Dance The Fandango!
Скачать презентацию Printer cables F Maximum length for parallel cable
867d480d641e6d1fba5fc916540bdbf3.ppt