Error (148) Developer Unit Rotation Failure - Lexmark Optra C Service Manual

Error (148) Developer Unit Rotation Failure

FRU
1 Poor
connection
2 Door switch
3 Developing
rotary brake
clutch
Developing unit
drive clutch
Mechanical
controller PCB
Developing unit
motor
Mechanical
controller PCB
4 Developing
rotary position
sensor
Mechanical
controller PCB
2-28
Action
Check the connection on the mechanical controller
PCB connector J2016. Reconnect it.
Turn the machine off and disconnect the power cord.
Disconnect connector J7 from the power supply unit.
When you turn the door switch (SW2) ON, is there
continuity between connectors J7-1 (+24VB) and J7-
2 (+24VA)? Replace the door switch.
Watch the developer unit motor during POST. Does
it rotate? If yes, replace and check as follows:
1. Developing rotary brake clutch.
2. Developing unit drive clutch.
3. Mechanical controller PCB.
If no, replace and check as follows:
1. Developing unit motor.
2. Mechanical controller PCB.
Check the connections on the mechanical controller
PCB connector J2006 and developing rotary
position sensor connector J60. Clean the sensor. If it
is not possible to clean it, replace and check as
follows:
1. Developing rotary position sensor.
2. Mechanical controller PCB.