Lexmark MB2338 Service Manual page 136

Toner density error service check
Action
Step 1
Reseat the toner density sensor cable.
Does the problem remain?
Step 2
a
Remove the toner cartridge and imaging unit.
b
Clean and check both units for toner leaks.
Are the toner cartridge and imaging unit free of leaks?
Step 3
a
Remove the transfer roller to access the area underneath it. See
"Transfer roller removal" on page
b
Clear the area of dust and toner contamination.
c
Remove tray 1, and then manually actuate the toner density
sensor wiper by moving the pick roller up and down.
Does the problem remain?
Step 4
a
Remove the sensor (toner density). See
density) removal" on page
b
Check the sensor and its wiper bracket for damage.
Are the sensor and its wiper bracket free of damage?
Step 5
a
Clean, and then reinstall the sensor and its wiper bracket. Add
lubrication to the wiper bracket if necessary. See
(toner density) removal" on page
b
Check the pick roller cam for damage.
Note: The rotation of the pick roller cam triggers the
movement of the wiper bracket.
Is the pick roller cam free of damage?
Step 6
Replace the sensor (toner density). See
removal" on page 265.
Does the problem remain?
Step 7
Replace the pick roller cam. See
on page 268.
Does the problem remain?
250.
"Sensor (toner
265.
"Sensor
265.
"Sensor (toner density)
"Pick roller assembly removal"
Diagnostics and troubleshooting
136
7017-2xx, -4xx, -6xx
Yes No
Go to step 2. The problem is
solved.
Go to step 3. Replace the affected
toner cartridge and
imaging unit, and
then go to step 3.
Go to step 4. The problem is
solved.
Go to step 5. Go to step 6.
Go to step 6. Go to step 7.
Go to step 7. The problem is
solved.
Contact the next The problem is
level of support. solved.