Oki ES3640MFP Component Replacement Manual page 89

8. Remove 1 (metal, 6 mm) screw on each of the 4 Imaging Unit Drum Phase Sensors and release the sensors
from their retainers.
9.
Release the wiring from the guide just above the Cyan Imaging Motor.
10. Disconnect the Fan connector from the right side of the board.
11.
Position the Toner Supply Cams so they are flush with the openings in the frame.
12.
Shift the Toner Supply Housing to the left, when viewed from the front, to release the 4 hooks located next to the
grounding contacts.
13.
Release the 4 hooks located along the top edge of the housing, and then remove the housing.
14.
Release the 4 tabs along the bottom edge of the board.
15.
Lift the lower edge out, and then slide the upper edge from underneath the tabs to remove the Imaging Unit
Sensor Board from the housing.
Replacement Note: Three springs provide contact between the Imaging Unit Sensor Board and each Imaging Unit
(12 total). These springs are captured in the housing by the board. When installing the board into the housing, make
sure these contact springs are positioned correctly.
Up/Down Sensor Drum Phase Sensors