There Are Horizontal Bands In White Or Black - Kyocera ECOSYS P2235dn Service Manual

(1-7) There are horizontal bands in white or black

Image sample
Trouble location
1 Developer unit
2 Drum unit
3 Transfer roller
4 High voltage PWB
1. developer unit dirt, contact dirt. Sleeve roller scratch.
2. Drum unit scratch or dirt. Ground is defective.
3. Charger roller is deformed.
4. Primary transfer roller terminal dirt.
Check
1. Check the print image on
paper has a problem in the
interval of the circumference
of the developer roller.
2. Check if the sides of the
developer roller and the bias
terminal are dirty.
3. There is the cleaning failure
at the developer roller sur-
face.
4. Check if there are scratches
on the sleeve roller.
1. Check the print image on
paper has a problem in the
interval of the circumference
of the drum.
2. Check the drum surface
potential erasing failure.
3. Check if the drum is
scratched.
4. Check the ground terminal of
the drum or drum drive shaft.
Check if the terminal for the high
voltage PWB and the transfer
roller is dirty with toner. Check if
the terminal is deformed and
there is no contact.
Contact failure of the high volt-
age PWB or uneven bias volt-
age.
Factor
1. If the sides of the developer roller and the
bias terminal are dirty, clean them.
2. Replace the developer unit. (see page 4-
10)
Execute the drum refreshing. ([System Menu]
> [Adjustment/Maintenance])
Lower the MC (main charge) value. ([System
Menu] > [Adjustment/Maintenance])
Replace the drum unit. (see page 4-11)
1. Check the drum unit attachment and reat-
tach it if its fixing is insufficient.
2. Replace the drum unit.
(see page 4-11)
1. Clean the terminal if it is dirty.
2. Correct the terminal if it is deformed so that
it contacts.
3. Replace the PF PWB.
(see page 4-87)
Check if how the high voltage PWB is attached
and secure it with screws to secure grounding.
Or, replace. (see page 4-68)
7-41
2RV/2RW/2RX/2RY/3RA-1
Measures