Brother HL-4140CN Service Manual page 414

(26) Remove the Connector (CN8) and two Flat cables from the Laser unit to remove the
Laser unit from the Base frame unit.
Laser unit
Flat cable
Flat cable
Assembling Note:
When connecting flat cable(s), do not insert them at an angle. After insertion, check
that the cable are not at an angle.
(27) After replacing the Laser unit, reset the counter. (Refer to
in Chapter 5.)
26a
26a
Fig. 7-39
7-23
CN8
26b
Connector
<Front>
"2.3 Parts Life Reset Function"
Base frame unit
Confidential