Kyocera TASKalfa 5551ci - Image Formation: Longitudinal Uneven Density; Image Formation: Horizontal Uneven Density

2L6/2N6/2N5/2N4
1-4-228
4. DP-scanning second (back) page (with a reversed DP installed)
7
Main PWB The main PWB is defective. Replace the main PWB.(see page 1-5-72)
Defective part Check description Corrective Action
1
Original document Check whether the original
document is dirty.
If the original document is dirty, replace.
2
Contact glass Check whether the contact glass
is dirty.
If the contact glass is dirty, clean the contact
glass, and the bottom part of the shading plate.
3
FFC cable CCD Check the FFC cable between
the CCD sensor and ISC PWB is
properly connected. Or, verify
conduction of the wire.
Reinsert the connector if its connection is
loose. Or, if conduction is lot, replace the wire.
4
FFC cable LED Check the FFC cable between
the LED PWB and ISC PWB is
properly connected. Or, verify
conduction of the wire.
Reinsert the connector if its connection is
loose. Or, if conduction is lot, replace the wire.
5
SATA cable ISC
Check the SATA cable between
the ISC PWB and main PWB is
properly connected. Or, verify
conduction of the wire.
Reinsert the connector if its connection is
loose. Or, if conduction is lot, replace the wire.
6
LED PWB Check that the LED is lit. If the LED is not lit, replace the LED PWB and
perform U411.
7
ISC PWB The ISC PWB is defective. Replace the ISC PWB and perform U411.
(see page 1-3-173)
8
Main PWB The main PWB is defective. Replace the main PWB.(see page 1-5-72)
Defective part Check description Corrective Action