Brother HLL3290CDW Service Manual page 272

Assembling Note:
Fold the LED control flat cable at the positions described below.
Reinforcing plate
Double-sided tape
2±1
Reinforcing plate
LED control PCB side
86±1
136±1
45°
31±1
45°
1±1
45°
4±1
19±1
45°
45°
82±1
15±1
Main PCB side
Fig. 3-65
3-81
123±1
Mountain fold
Valley fold
Confidential