Brother HL-2600CN Service Manual page 242

4.2.15 Developer Drive Unit 2
1) Remove the set screws ST3X6 (4 pcs.) from the developer drive unit 2.
2) Remove the developer drive unit 2 from the frame.
4.2.16 Toner Sensor ASSY (TPD)
1) Remove the set screws ST3X6 (2 pcs.) from the toner sensor ASSY.
2) Disconnect the connector to the toner sensor ASSY.
Note:
If the optional lower tray unit is fitted, remove the left hand screw of the front cross rail to
release the media cassette guide.
Fig.7-43
Fig.7-44
VII-30
Developer drive unit 2
Toner Sensor ASSY (TPD)