Kyocera ECOSYS M2135dn Service Manual page 450

(2-9) Uneven density horizontally
Image sample
Trouble location
1 Main drive
2 Drum unit
3 Developer unit
4 LSU
1. Uneven rotation of the main drive.
2. Main charger roller rotation error.
3. Improper contact on the developer unit terminals.
4. LSU is defective.
Check
Check to see if the drive mecha-
nism for the developer unit and
drum unit is smoothly operative.
The drum surface is worn down.
1. Check if the developer bias
connection terminal of the
developer unit is dirty with
toner.
2. The DS pulleys at the sides
of the developer unit are
damaged.
Check the image if it is the phe-
nomenon from uneven laser
beam output.
2S0/2S1/2S2/2S3/2S4/2S5/2SG/2SH/3RA-1
Factor
1. Check the fitting condition of the developer
unit and drum unit and clean the drive
transmission section and apply grease if it
is dirty.
2. Check if the main drive unit is surely
secured with screws and reattached it.
1. Replace the drum unit. (see page 4-11)
1. Clean the terminal if it is dirty.
2. Clean the developer unit or replace it if the
DS pulley is damaged.
(see page 4-10)
Replace the LSU. (see page 4-28)
7-75
Measures