Is the TD sensor initial setting (SP2-220) within the 2.5 ± 0.1 V
range?
Yes
Replace the TD sensor.
Is the TD sensor output (SP2-215-001) between 0.3 and 4.0 V?
Yes
No
Replace the TD sensor.
Set the toner supply mode to Detect Supply Mode.
To do this, set SP2-208-001 to 3.
FSM
No
6-25
FT5535/4527/4522