2WA/2NJ/2RK
7-20
(2-12) Partly dark or light image
When scanning the second (back) side through the DP
Step Check description Assumed cause Measures Reference
1 Checking the image quality
mode
Image quality is not prop-
erly adjusted. (Original
type and image quality are
mismatched.)
Set the image quality accord-
ing to the originals.
2 Replacing the original The original is dirty. Replace the original.
3 Correcting the original The originals are bent or
creased.
Stretch the bending or the
paper creases of the original.
4 Checking the DPCIS roller The DPCIS roller does not
rotate properly.
Reattach the DPCIS roller
driving section.
5 Cleaning the CIS glass The CIS glass is dirty. Clean the CIS glass and the
DP conveying guide.
6 Checking the DP relay
PWB
The DP relay PWB is not
properly attached.
Reattach the DP relay PWB.
7 Checking the SATA cable The connector is not prop-
erly connected.
Reinsert the connectors of
the SATA cable between the
DPSHD PWB and the DP
relay PWB.
Wiring dia-
gram
8 Replacing the SATA cable The SATA cable is
deformed or broken.
Replace the SATA cable
between the DPSHD PWB
and the DP relay PWB.
Wiring dia-
gram
9 Checking the DPSHD
PWB
The DPCIS is not properly
connected to the DPSHD
PWB.
Reconnect the DPCIS to the
DPSHD PWB.
10 Replacing the DPSHD
PWB
The DPSHD PWB is faulty. Replace the DPSHD PWB.
11 Replacing the DPCIS The DPCIS is faulty. Replace the DPCIS, and then
execute U091 and U411.
Detaching
and Reat-
taching the
DPCIS
12 Replacing the DP relay
PWB
The DP relay PWB is
faulty.
Replace the DP relay 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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