Brother DCP-7057 Service Manual page 237

Note:
• Do not touch the lens of the laser unit directly.
Laser unit
Assembling Note:
• There are three types of Laser unit that can be ordered as a spare part.
(SG type Laser unit is compatible with SJ type Laser unit.
SH type Laser unit is compatible with SK type Laser unit.)
<How to identify the type of Laser unit and the position of label>
Check the first two characters of the Laser serial label.
• SF type : SF x x x x x x VX X Y Y
• SH type : S H x x x x x x V X X Y Y
• SG type: SG x x x x xx V X X Y Y
• SJ type : S J x x x x x x V X X Y Y
• SK type : S K x x x x x x V X X Y Y
Laser plate
Assembling Note:
• Attach the Laser serial label as shown in the figure (on laser plate) above after replacing
the laser unit.
Fig. 3-81
Laser serial label
Fig. 3-82
3-93
Lens
Laser unit
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