Lexmark 4059-XXX - Manual (Page 187)

Repair Information 4-24
4059-XXX
Fans
Auxiliary Fan (Models 2420/2450/2455/3455)
1. Remove the right cover.
2. Remove the inner EMC shield.
3. Remove the fuser wiper cover.
4. Disconnect the auxiliary fan cable from the engine board at
connector J7.
5. Note the routing of the auxiliary fan cable (A) and remove the
fan (B).