Developer Drive Unit 3 - Brother HL-3450CN Service Manual

CHAPTER 7 DISASSEMBLY & RE-ASSEMBLY
4.1.14

Developer drive unit 3

(1) Remove the set screw ST3x6 (1pc.) to remove the cover RF.
(2) Release the harnesses from the harness holder.
(3) Remove the developer drive gear for each color toner from the inside of the developer
driver unit 3.
(4) Remove the set screws ST3x6 (4 pcs.) to remove the developer drive unit 3 from the
main frame.
NOTE
The gears removed in (3) must be replaced with new gears every time, do not re-use the
removed gears.
Four gears are supplied with a replacement developer drive unit 3.
Developer drive gear
When disassembling the developer drive unit 3, be sure not to lose the metal retainer holding
the unit.
Metal retainer
Fig. 7-23
CAUTION
7-20
Developer drive unit 3
Cover RF