Kyocera TASKalfa 7002i Service Manual page 893

Step Check description
14 Replacing the engine PWB The engine PWB is faulty.
15 Replacing the main PWB
(3-3) Black or color spots appear on the image
Step Check description
1 Checking the original
2 Checking the contact glass The contact glass is dirty.
3 Checking the FFC
4 Checking the ISU
5 Replacing the engine PWB The engine PWB is faulty.
6 Replacing the main PWB
Assumed cause
The main PWB is faulty.
Assumed cause
The original is dirty.
The FFC is not properly
connected, or it is faulty.
The CCD PWB is faulty.
The main PWB is faulty.
7-33
Measures
Replace the engine PWB.
Replace the main PWB.
Measures
Replace the original.
Clean the contact glass.
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
Detaching
and Reat-
taching the
engine
PWB
Detaching
and Reat-
taching the
main PWB
Reference
Wiring dia-
gram
Detaching
and Reat-
taching the
ISU
Detaching
and Reat-
taching the
engine
PWB
Detaching
and Reat-
taching the
main PWB