Fuser Fan; Front Sensor Board - Oki ES3640MFP Component Replacement Manual

Registration Sensor Board
The Registration Sensor Board includes the Front Color Registration Sensor attached by a ribbon cable, the Rear
Color Registration Sensor integrated onto the board, the interface for the ADC Sensor, and the Transfer Unit Belt
Slack Sensor. Replacement of either Color Registration Sensor requires replacement of the board.
Note: The Color Registration Sensors are protected from the Transfer Unit belt by small, transparent covers. These
covers are held in place by a hook and the presence of the sensor. Use care not to loose the sensor covers.
1. Remove the Registration Sensor Assembly.
2.
Turn the assembly over and remove the 2 (metal, 6 mm) screws that secure both parts of the board.
3.
Remove the Registration Shutter Solenoid.
4. Disconnect the connectors on the Registration Sensor Board.
5.
Slide the ribbon cable connected to the Front Color Registration Sensor out from under the retainers and remove
the board.

Fuser Fan

1.
Open the Top Cover.
2.
Remove the 1 (black, 10 mm) screw that secures the Upper Fuser Fan Duct to the Top Output Chute.
3. Remove the 1 (metal, 6 mm) screw that secures the Lower Fuser Fan Duct to the frame.
4.
Disconnect the connector (P/J250) at the top of the frame and remove the Fan and Duct from the printer.
5.
Release the 4 hooks that secure the fan to the duct.

Front Sensor Board

The Front Sensor Board is located behind the Front Sensor Board Cover inside the Registration Assembly.
Note: A spring is used to maintain tension against the retention hooks. This spring is not captive to either the board or
Registration Assembly. Use care not to loose this spring when removing the board.
1.
Remove the Registration Assembly.
2.
Disconnect 3 connectors from the board.