Brother HL 1240 - B/W Laser Printer Service Manual page 76

CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY
3.7 Laser Unit
(1) Remove the three M3x16 Taptite screws.
(2) Push the P harness cover to the right to release it from the hook and remove the P
harness cover.
(3) Disconnect the LD harness and the polygon motor connector.
(4) Taking care not to touch the lens and mirror, remove the laser unit.
Laser unit
Polygon motor harness
(hook)
!
CAUTION:
·
Never touch the reflect mirror and lens inside the laser unit. If there is any dirt or dust on
the mirror or lens, blow it off using an air gun.
·
Never touch the scanner window on the printer body. If there is any dirt or dust on the
window, blow it off using an air gun. If cleaning the underside of the scanner window, wipe
off dirt or dust with soft clean paper. Refer to
Window' in CHAPTER
LD harness
P harness
5.
Reflect mirror
Laser unit
Taptite, cup M3x16
cover
Fig. 4-22
subsection 3.3 'Cleaning the Scanner
Scanner window
Lens
Fig. 4-23
4-14
Polygon motor harness
Taptite, cup M3x16
Taptite, cup M3x16
Printer body