No Image Appears (Entirely White) - Kyocera ECOSYS P2235dn Service Manual

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Image sample
Trouble location
1 Developer unit
2 Drive gear train
3 High voltage PWB
4 Laser scanner unit
(LSU)
5 Main/Engine PWB
1. Developer bias is not output or not impressed. (Contact failure)
2. The developer lock shaft is not inserted. (The DS gap is wide)
3. Developer roller rotation failure.
4. Defective primary transfer.
5. Laser is not output from the laser scanner unit (LSU).
6. Drum does not rotate.
Check
Check insertion of the lock shaft. If the lock shaft is not inserted properly, insert it
Check if the developer drive
gear is broken.
Check if the developer roller can
be rotated manually.
Check dirt and deformation of
the developer unit and high volt-
age PWB contact terminal.
Check if there is damage in the
developer drive gear.
1. Check that the high voltage
output terminals (B,T) on the
high voltage PWB surely
contact with the developer
roller and transfer roller.
2. Check the connection
between the high voltage
PWB and connector. Or,
The high voltage PWB (devel-
oper, transfer) output failure.
Check the connector contact. Or,
check the wire's continuity.
Check if the main/engine PWB
control signal is not output.
Factor
securely. (see page 4-10)
Replace the developer unit if broken. (see
page 4-10)
Replace the developer unit if it has a problem.
(see page 4-10)
Clean the terminal if it is dirty.
Correct the terminal if it is deformed so that it
contacts.
Replace the applicable gear if damaged.
1. Clean the terminal if it is dirty.
2. Correct the terminal if it is deformed so that
it contacts.
3. If the connector is not inserted enough,
reinsert it. Replace the wire if there is no
continuity.
High voltage PWB and Engine PWB
(YC16)
Replace the high voltage PWB.
(see page 4-68)
1. Reinsert the FFC cable if it is incompletely
inserted. Replace the wire if there is no
continuity.
2. Replace the LSU. (see page 4-26)
Replace the main/engine PWB. (see page 4-
63)
7-34
2RV/2RW/2RX/2RY/3RA-1
Measures