QMS Magicolor WX User Manual page 140

9 Replace the toner cartridge that you removed in step 2.
10 Replace the printer's top cover.
Note: You may want to clean the paper guide and the register and
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paper exit rollers at this time also. They should be cleaned every
20,000 copies or 12 months, whichever comes first. See "Cleaning
the Rollers" on page 5-34.
Caution: The OPC belt is extremely sensitive to bright light and direct
sunlight. Do not remove it from its protective bag until you are ready
to install it. Limit exposure to 2 minutes. If exposure exceeds this, put
the belt in a dark place to recover; depending on exposure, recovery
may take up to 2 hours.
After it's installed, only remove the top cover of the printer when
necessary and replace it as soon as possible. Also, handle the belt
cartridge carefully by its green end-handle or the two green side-
handles only: it's extremely sensitive to hand oils, moisture, solvents,
corrosives, dust, and scratches, all of which will reduce print quality.
You should reinstall the pressure release and tension release pin sets
(one on the left side and one on the right) in the cartridge if it will be
out of the printer for any extended time period. These pins protect and
relieve tension on the belt and cleaning blade.