Kyocera TASKalfa 7002i Service Manual page 895

(3-6) Horizontal black streaks
Step Check description
1 Checking the original
2 Checking the contact glass The contact glass is dirty.
3 Executing U066
4 Executing U411
5 Checking the FFC
6 Checking the CCD PWB
7 Replacing the engine PWB The engine PWB is faulty.
8 Replacing the main PWB
Assumed cause
The original is dirty.
The backside image of the
size direction plate is
scanned. (Adjustment
value of U066 [Front] is not
proper.)
The backside image of the
size direction plate is
scanned. (Adjustment
value of U411
[Table(ChartA)] is not
proper.)
The FFC is not properly
connected, or it is faulty.
The CCD PWB is faulty.
The main PWB is faulty.
7-35
Measures
Replace the original.
Clean the contact glass.
Adjust U066 [Front].
Execute U411 [Table(Chart
A)].
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
Reconnect the CCD PWB
wire. Then, replace the ISU if
the issue is not resolved.
Replace the engine PWB.
Replace the main PWB.
2WA/2NJ/2RK
Reference
Executing
U066
Executing
U411
Wiring dia-
gram
Detaching
and Reat-
taching the
ISU
Detaching
and Reat-
taching the
engine
PWB
Detaching
and Reat-
taching the
main PWB