Kyocera TASKalfa 7002i Service Manual page 899

(3-10) Moire
Step Check description
1 Checking the settings
2 Checking the original
3 Executing U065
4 Executing U411
(3-11) Blank image or entirely black image
Step Check description
1 Checking the original
2 Checking the FFC
3 Checking the ISU
4 Replacing the engine PWB The engine PWB is faulty.
5 Replacing the main PWB
Assumed cause
The original imaging qual-
ity is not properly set.
(Moire changes depend-
ing on the print quality.)
The original is not properly
set. (Moire appears in the
original scanning direc-
tion.)
The ratio in the main scan-
ning direction is large.
(This problem occurs when
the print ratio is set as
100%.)
Each adjustment of the
scanner section is incor-
rect
Assumed cause
The originals were set
upside down.
The FFC is not properly
connected, or it is faulty.
The CCD PWB is faulty.
The main PWB is faulty.
7-39
Measures
Set [Original Image] in [Sys-
tem Menu/Counter] key >
[Common Settings] > [Func-
tion Defaults].
Rotate the originals in 90
degrees and reset them.
Change the value at U065
[Main Scan] to reduce the
scanner magnification in the
main scanning direction.
Execute U411 [Table(Chart
A)].
Measures
Reset the original to correct
the front and back direction.
Reconnect the following FFC.
When the FFC terminals are
peeled off or deformed or the
FFC is broken, replace the
FFC. • CCD PWB - Engine
PWB
Replace the ISU.
Replace the engine PWB.
Replace the main PWB.
2WA/2NJ/2RK
Reference
Executing
U065
Executing
U411
Reference
Wiring dia-
gram
Detaching
and Reat-
taching the
ISU
Detaching
and Reat-
taching the
engine
PWB
Detaching
and Reat-
taching the
main PWB