Oki LP-1040 Maintenance Manual page 358

<Removal>
1.
Remove the circuit board as it is in the way
when replacing the fan (see the items
discussed previously for replacing the circuit
board).
2.
Unplug the connector from the fan you are
about to replace, and unscrew the two
screws to remove the unit.
Open the drawer for roll 1 and insert your
hand from underneath to remove the BL05
on the back.
Chapter 9 Parts Disassembly, Assembly, and Replacement
9-71