Brother MFC-4820C, Service Manual

Page: 117 / 268

6-32
Reassembling Notes
• When handling the center base flap ASSY, take care not to touch the urethane section sticking
out of the center slit on the ASSY by hand as the dirt or oil on your hands can easily affect paper
feeding performance.
If the urethane section has been touched, lightly wipe it with a cloth dampened with alcohol.
• When handling the ASF roller ASSY, take care not to touch the rubber rollers by hand as the dirt
or oil on your hands can easily affect paper feeding performance.
If the rubber rollers have been touched, lightly wipe them with a cloth dampened with alcohol.
When setting the ASF roller ASSY back into place, fit the free end of the ASF roller spring in the
groove provided in the ASF frame, as shown on the previous page.
• Take care with the direction of the sensor harness (ASF-main). Join the connector housing that is
farther from the ferrite core to the sensor PCB. (See the illustration on page 6-30.)
• Before securing the ASF, loosen four shoulder screws "g" and two grounding screws "h" on the
engine unit (see page 6-34). This is to make the ASF and engine unit parallel with each other.
When installing the ASF, first fit bosses provided on the underside of the front right and left ends
of the ASF into the engine unit and then set the rear end. Next, push down the ASF to engage the
four front latches with the engine unit.
When securing the ASF with screws, observe the tightening order shown on page 6-30: screw "b"
(right-hand)
→
screw "b" (left-hand)
→
two screws "a"
→
two screws "c."
After that, tighten four shoulder screws "g" and two grounding screws "h" on the engine unit.