2WA/2NJ/2RK
7-36
(3-7) Vertical black / color streaks or band
Step Check description Assumed cause Measures Reference
1 Checking the original The original is dirty. Replace the original.
2 Checking the settings Actual original size and
detected original size are
mismatched.
Set the original paper size.
3 Checking the original
cover
The original cover is dirty. Clean the original cover.
4 Executing U067 The center line settings are
incorrect. (The streaks or
bands appear out of the
original image.)
Adjust U067 [Front]. Executing
U067
5 Executing U411 The leading edge timing is
incorrect. (Streaks or
bands appear out of the
original.)
Execute U411 [Table(Chart
A)].
Executing
U411
6 Checking the contact glass The contact glass or the
shading plate at the back-
side of the contact glass is
dirty.
Clean the contact glass and
the shading plate at the back-
side of the contact glass.
7 Checking the mirror The mirror is dirty. Clean the mirrors of the lamp
unit assy (mirror frame A, B).
8 Checking the lamp unit
assy (mirror frame A, B).
The dust is adhered on the
lamp unit assy (mirror
frame A, B).
Remove dust on the laser
path of the lamp unit assy
(mirror frame A, B).
9 Cleaning the CCD PWB Dust is on the CCD PWB. Clean the CCD PWB using
an air-blower.
10 Executing U063 The image scanning posi-
tion is incorrect.
Execute U063 to change the
scanner shading position.
Executing
U063
11 Replacing the ISU The CCD PWB is faulty. Replace the ISU. Detaching
and Reat-
taching the
ISU
12 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Detaching
and Reat-
taching the
engine
PWB
13 Replacing the main PWB The main PWB is faulty. Replace the main PWB. Detaching
and Reat-
taching the
main PWB
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