Toner Key Sensor (Tnk); Toner Sensor (Ttr) - Brother HL-3450CN Service Manual

4.3.10

Toner key sensor (TNK)

(1) Remove the set screws ST3x6 (4 pcs.) from the toner key sensor PCB.
(2) Disconnect the connector (1 pc.) connected to the IOD1 PWB.
(3) Remove the toner key sensor PCB.
Toner key sensor
4.3.11

Toner sensor (TTR)

(1) Remove the set screw ST3x6 (2 pcs.) to remove the metal plate.
(2) Remove the set screws ST3x6 (2 pcs.) from the toner sensor PCB.
(3) Disconnect the connector and remove the toner sensor PCB.
NOTE:
There are two sets of tapped holes for the metal plate. Be sure to attach the metal plate onto
the one closest to the toner sensor.
Fig. 7-59
Metal plate
Fig. 7-60
Toner sensor (TTR)
7-41
HL-3450CN SERVICE MANUAL