Text preview for : 05_clean.pdf part of Xerox Phaser 740 wanted service manual
Back to : 740.part1.rar | Home
Cleaning and Maintenance
Service preventive maintenance procedure
Whenever you check, service, or repair a printer, you should perform the following procedures. Cleaning the printer, as outlined in the following steps, assures proper operation of the printer and reduces the probability of having to service the printer in the future. The frequency of use and the type of paper a customer prints on determines how critical cleaning the machine is. Users of ordinary Bond paper (copier paper) should have very few problems since this paper is smooth and relatively dust-free. You should thoroughly inspect and clean these printers. Ask each printer customer about the type of paper he or she uses so that you can be sure to clean the parts of the printer that particular paper may affect. If a customer is printing on the more unusual or dustier papers, then you should pay particular attention to these printer parts:
s s s
The standard pick roller The multi-purpose pick roller (should be replaced at 30 k prints) The multi-purpose tray cork separator (should be replaced when multipurpose pick roller is replaced) The feed rollers The auto-duplex unit rollers The cabinet interior The exit rollers
s s s s
Service Guide
63
Recommended tools
s s s s s s s
Toner vacuum cleaner Suction bulb (air blower) Cleaning water Lint-free wipes Cotton swabs Imaging unit cover Isopropyl alcohol (greater than 90% pure)
Cleaning
1. Turn off the printer. 2. Remove the imaging unit and immediately cover it to protect it from the
light.
3. Remove the toner cartridges. 4. Remove the fuser. 5. Remove the paper tray. 6. Slide out the paper feeder. 7. Clean the accumulator belt home position sensor with a dry cotton swab. 8. Clean all printer rollers, except the second bias transfer roller, with alcoholdampened wipes only. Never apply alcohol on the second bias transfer roller.
9. Clean the laser window with puffs of air from the suction bulb. Alternately,
you can vacuum the window clean.
10. Wipe off the pre-exposure lamp bezel and the pre-transfer lamp bezel with a
lint-free wipe.
11. Vacuum out the interior of the printer.
64
Phaser 740 Color Printer
12. Carefully clean the area around the second bias transfer roller's cleaning
roller for impacted toner.
a. b. c.
Remove the second bias transfer roller Tap on the cleaning roll cover to knock the toner loose from that area. Vacuum the toner.
Lubrication
s
Molybdenum-based (brown) grease, part number 006-7436-00. For all metal-to-metal, metal-to-plastic, and plastic-to-plastic gears. High-temperature, electrically-conductive grease, part number 006-7056-00. For the plastic gears of the fuser and the end of the transfer roller shaft.
s
Service Guide
65
66
Phaser 740 Color Printer