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Developer unit:
1.
Clean the unit with vacuum cleaner (of course the developer layer on the developer roller
shouldn't be vacuumed). Don't turn the unit up side down as the developer material will spill
out. Clean underneath the developer roller. If there is too much toner, that is an indicator the
developer material is worn and needs to be replaced. Rotate the input gear of the unit in
direction A. If there is too much torque needed this is an indicator of a mechanical failure that
will be discussed in following articles. However do not allow the operator to use the machine
because this will lead to unneeded failures in the main drive assembly. Check if the developer
roller spacers B are freely rotating. However too much play is also an indicator for wear. See
figure 22.
A
B
22
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