Brother Laserprinter Hl 1435 User Guide

5 - 7   ROUTINE MAINTENANCE
7Clean the primary corona wire inside the drum unit by gently sliding the blue tab from right to left 
and left to right several times. Return the tab to the home position (▲) before you put the drum unit 
assembly back in the printer. If you do not, printed pages may have a vertical stripe.
Figure 5-11
8Put the drum unit assembly back in the printer. Close the front cover of the printer.
Figure 5-12 

ROUTINE MAINTENANCE   5 - 8
Drum unit
This printer can print up to 20,000 pages* with one drum unit.
* At 5% print coverage (A4 or Letter size). The actual number of printed pages will vary depending on 
the average type of print job and paper. 
Change Drum message
If the LED shows the message below, it means the drum unit is near the end of its life. We recommend 
that you replace the drum unit with a new one before there is a noticeable deterioration in the print 
quality.
Figure 5-13
Caution
■While...

5 - 9   ROUTINE MAINTENANCE
Replacing the drum unit
Follow these steps to replace the drum unit. You can also view the drum unit replacement method in the 
instructional video on the supplied CD-ROM: 
1Open the front cover of the printer.
2Pull out the drum unit assembly.
Figure 5-14
Caution
■We recommend that you place the drum unit assembly on a piece of disposable paper or cloth 
in case you accidentally spill or scatter toner.
■To prevent damage to the printer from static electricity, do not touch...

ROUTINE MAINTENANCE   5 - 10
3Hold down the blue lock lever and take the toner cartridge out of the drum unit assembly.
Figure 5-16
Caution
Handle the toner cartridge carefully. If toner scatters on your hands or clothes, immediately wipe or 
wash it off with cold water.
4Unpack the new drum unit.
Caution
Wait to unpack a drum unit until immediately before you put it in the printer. Exposure to direct 
sunlight or room light may damage the drum unit.
5Put the toner cartridge in the new drum unit until...

5 - 11   ROUTINE MAINTENANCE
6Put the drum unit assembly in the printer.
Make sure that the printer is turned on, the front cover is open and the Drum and Alarm LED are lit.
Figure 5-18
7Reset the drum counter. See the instructions supplied with the new drum unit.
Caution
■The Drum LED indication does not disappear until you reset the drum counter.
■Do not reset the drum counter when you replace only the toner cartridge.
8Close the front cover.
9Make sure that the Drum LED is now off. 

ROUTINE MAINTENANCE   5 - 12
Cleaning
Clean the outside and inside of the printer regularly with a dry soft cloth. When you replace the toner 
cartridge or the drum unit, make sure you clean the inside of the printer. If printed pages are stained with 
toner, clean the inside of the printer with a dry soft cloth.
See the Maintenance Tutorial section in the supplied CD-ROM. You can see instructional videos on 
your computer screen, showing you how to perform these tasks.
1You can see how to clean the...

5 - 13   ROUTINE MAINTENANCE
Replacing maintenance parts
You need to replace the maintenance parts regularly to maintain print quality. You should replace the 
units listed below after printing the following number of pages.
* The actual number of printed pages may vary depending on your average type of print job and paper. 
These figures are based on 5% coverage per page. Item Approximate Life To Purchase Replacement
Fixing unit50,000 pages * Call Customer Service
Separator pad holder 
assembly50,000...

TROUBLESHOOTING   6 - 1
6
Identifying your problem
First, check the following:
■The power plug is connected properly and the printer is turned on.
■All of the protective parts have been removed.
■The toner cartridge and drum unit are installed properly.
■The front cover is fully closed.
■Paper is inserted properly in the paper tray.
■The interface cable is securely connected to the printer and the computer.
■The correct driver for the printer is installed and selected.
■The PC is set up to connect to the...

6 - 2   TROUBLESHOOTING
Error messages in the status monitor
The Status Monitor will report problems with the printer. Take the corrective actions listed in the following 
table for the error message that the Status Monitor reports.
The default setting for the Status Monitor is off. If you would like to turn the Printer Status on, you can 
change the setting of the Status Monitor in the Device Options of the Advanced tab. See Device 
Options on page 2-5.
Error message
Action
Cover Open■Close the front...

TROUBLESHOOTING   6 - 3
Error message printouts
The printer will report problems by printing an error message as defined in the following table. Take the 
corrective actions for the error message.
Error message Action
Memory Full■Press the Control panel button to print the data left in the printer. 
■Reduce the print resolution or reduce the complexity of your document.
Print Overrun■Press the Control panel button to print the data left in the printer. 
■If this does not clear the error, reduce the...