Brother HL-4040CN, HL-4050CDN, HL-4070CDW Service Manual page 203

(3) Disconnect the two flat cables (CN1, CN4) and connector (CN8) from the Laser unit.
Note:
- After disconnecting the flat cable(s), check that each cable is not damaged at its end or
short-circuited.
- When connecting the flat cable(s), do not insert it at an angle. After insertion, check that
the cable is not at an angle.
(4) Remove the seven cup S M3x6 SR Taptite screws, and then remove the four Scanner
holders and Laser unit.
Taptite, cup S M3x6 SR
Scanner holder
Positioning boss
Scanner holder
Assembling Note:
When assembling the Laser unit with the Scanner holders, ensure to put the positioning
boss of the Laser unit into the positioning hole referring to the figure above.
Fig. 3-133
Taptite, cup S M3x6 SR
Taptite, cup S M3x6 SR
Positioning hole
Fig. 3-134
3-94
Laser unit
<Front side>
Scanner holder
Laser unit
Positioning boss
Taptite, cup S M3x6 SR
Scanner holder
Frame unit
Positioning hole
<Front side>
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