Dell 5535dn Service Manual page 504

250-sheet controller card assembly removal
1. Remove the 250-sheet pick arm bracket assembly. See "250-sheet pick arm bracket assembly removal"
on page 4-179.
2. Release the hooks securing the sensor (pass through) to the drawer.
3. Remove the sensor (pass through) from the drawer.
4. Remove the four screws (A) securing the 250-sheet frame assembly to the drawer.
4-184
Service Manual