Sharp MX-4100N Service Manual page 343

4) Remove the screw, disconnect the connector, and remove the
non-contact thermistor.
Maintenance: Replace at every 300K.
5) Remove the screw, and remove the fusing lower cover.
6) Remove the screw, disconnect the connector, and remove the
lower thermistor.
Maintenance: Replace at every 300K.
(8) External heating unit removal
1) Remove the screw, and remove the fusing upper cover assem-
bly.
2) Remove the screw, and remove the terminal on the primary
side of the thermostat (2 positions).
Disconnect the connector of the thermistor.
3) Remove two external heating springs, and disengage the hook
and remove the external heating unit.
(External heading spring) Maintenance: Replace at every
300K.
MX-5001N MAINTENANCE 8 – 28