2L6/2N6/2N5/2N4
1-4-257
(1) No image appears (entirely white).
Print example
Cause of trouble
1. No or defective developing bias output.
2. Failure of the rotation of the developing roller.
3. Defective primary transfer.
4. Laser is not dispersed from the laser scanner unit (LSU).
5. The drum does not rotate.
Defective part
Check description
Corrective Action
1
Developing unit
Executing U089 to generate
four-color PGs and check the fol-
lowing with the color which is
defective:
Check whether the developer
drive gear is damaged.
If the gear is damaged, replace the developer
unit.
Check whether the developing
roller is rotated by hand.
If the developer unit is in fault, replace the
developer unit. (see page 1-5-57)
Check contamination and defor-
mation on the terminals of the
developer unit or the high-volt-
age PWB1.
If the connecting terminals are dirty, clean.
If the connecting terminals are deformed,
correct for a proper conduction.
2
High-voltage
PWB1
Check the connection of the con-
nectors in the high-voltage
PWB1. Or, verify conduction of
the wires.
Reinsert the connector if its connection is
loose.
Replace the cable if it has no conduction.
High voltage PWB 1 (YC1, 2) and engine
PWB (YC16)
High voltage PWB 1 (YC3, 4) and engine PWB
(YC17)
Check if the developing bias
value at its default by U140.
1. If the value obtaines by U140 does not
comfirm to the default value, reset it to the
default (see page 1-3-99).
2. Replace the high-voltage PWB1.
3
High-voltage
PWB2 (Transfer)
Check contamination and defor-
mation on the terminals of the
primary transfer roller and the
high-voltage PWB2.
1. If the connecting terminals are dirty, clean.
2. If the connecting terminals are deformed,
correct for a proper conduction.
Transfer current supplied by the
high-voltage PWB2 (transfer) is
faulty.
Replace the high-voltage PWB2.
Summary of Contents for TASKalfa 3051ci
Page 5: ...2L6 2N6 2N5 2N4 1 4 4 Machine Option2 Figure 1 4 4 Paper jam location Matchine Option2 ...
Page 201: ...2L6 2N6 2N5 2N4 5 1 4 200 ...
Page 202: ...2L6 2N6 2N5 2N4 5 1 4 201 ...
Page 203: ...2L6 2N6 2N5 2N4 5 1 4 202 ...
Page 204: ...2L6 2N6 2N5 2N4 5 1 4 203 ...
Page 257: ...2L6 2N6 2N5 2N4 5 1 4 256 16 Grainy image See page1 4 272 ...