Marker Sensor; Toner Density Sensor Pu - Brother MFC-9420CN Service Manual

5.1.26 Marker Sensor

(1) Disconnect the two connectors connecting to the maker sensor and toner density sensor PU.
(2) Remove the setscrew (BT4x8, 2 pieces), and remove the sensor base (TB) from the frame.
(3) Remove the maker sensor from the sensor base (TB).
Connector
Maker sensor

5.1.27 Toner Density Sensor PU

(1) Remove the setscrew (BT3x8, 2 pieces) of the toner density sensor PU from the sensor base
(TB).
(2) Remove the toner density sensor PU from the sensor base (TB).
BT4x8
Connector

Toner density sensor PU

Fig. 5-70
Fig. 5-71
5 -4 4
Sensor base (TB)
BT3x8
Toner density sensor PU
Sensor base (TB)
Confidential