Black Dots Appear On The Image - Kyocera TASKalfa 6501i Service Manual

(9) Black dots appear on the image.

Print example
1. Table scanning
Defective part
Original document
1
Contact glass
2
FFC cable CCD
3
SATA cable ISC
4
Main PWB
5
2. DP-scanning first (front) page
Defective part
Original document
1
Contact glass
2
FFC cable CCD
3
SATA cable ISC
4
Main PWB
5
Check description
Check whether the original
document is dirty.
Check whether the contact glass
is dirty.
Check the FFC cable between
the CCD sensor and ISC PWB is
properly connected. Or, verify
conduction of the wire.
Check the SATA cable between
the ISC PWB and main PWB is
properly connected. Or, verify
conduction of the wire.
The main PWB is defective.
Check description
Check whether the original
document is dirty.
Check whether the contact glass
is dirty.
Check the FFC cable between
the CCD sensor and ISC PWB is
properly connected. Or, verify
conduction of the wire.
Check the SATA cable between
the ISC PWB and main PWB is
properly connected. Or, verify
conduction of the wire.
The main PWB is defective.
If the original document is dirty, replace.
If the contact glass is dirty, clean the contact
glass, and the bottom part of the shading plate.
Reinsert the connector if its connection is
loose. Or, if conduction is lot, replace the wire.
Reinsert the connector if its connection is
loose. Or, if conduction is lot, replace the wire.
Replace the main PWB.(see page 1-5-74)
If the original document is dirty, replace.
If the contact glass is dirty, clean the contact
glass, and the bottom part of the shading plate.
Reinsert the connector if its connection is
loose. Or, if conduction is lot, replace the wire.
Reinsert the connector if its connection is
loose. Or, if conduction is lot, replace the wire.
Replace the main PWB.(see page 1-5-74)
1-4-184
Corrective Action
Corrective Action
2N8/2N7