Brother DCP-L8400CDN Service Manual page 310

(8) Remove the Mono color cam from the Main body.
Mono color cam
Assembling Note:
When assembling the Mono color cam, be sure to check that the Forced develop release
link is at "A" position. If you attach the Mono color cam as the Forced develop release link is
at "B" position, the Mono color cam may be damaged.
Mono color cam
Fig. 3-202
"A"
Forced develop release link
Fig. 3-203
3-146
Main body
Forced develop release link
Mono color cam
<Front side>
"B"
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