Riso 390 User Manual page 114

Troubleshooting
Problem
In the Book shadow editing, the
position for shadow erasure is
shifted.
Shadow erase processing in the
Book shadow editing does not erase
the central shadow.
Vertical blank lines are found on
printed copies.
The unwanted background of an
original is picked up on copies.
Dirt is found on printed copies.
112 Troubleshooting Tips
Cause
Custom-size paper has been placed
on the Paper Feed Tray.
Custom-size book or magazine was
placed as an original.
The size of the original differs from
the Size of originals for Book shadow
editing specified using the Custom
Setting mode.
The width of the erased central
shadow is too narrow.
The Thermal Print Head has been
smudged.
If newspaper or colored (coloured)
paper is used as an original, the
background is picked up on copies.
The Glass Platen (and/or the ADF
Scanner Glass) is not clean.
Action
The Book shadow editing does not
allow custom-size paper to be used.
Set standard-size paper.
Place a book or magazine on the
Glass Platen so that its binding
section comes to the center of the
paper size placed on the Paper Feed
Tray (or the size specified for the
Size of originals for Book shadow
editing using the Custom Setting
mode).
Check the Size of originals for Book
shadow editing specified in the
Custom Setting mode.
• With "0" selected
Place standard-size paper of the
same size of the original onto the
Paper Feed Tray.
• With "1" through "4" selected
Set the Size of originals for Book
shadow editing to the same size
as the size of the original.
p.64
Using the Custom Setting mode, set
the Width of central shadow for
Book shadow editing again.
p.64
Open the Master Making Unit Cover
and clean the Thermal Print Head.
p.97
If this does not solve the problem,
contact your authorized service
representative.
Set the scanning level to "Auto" or
lower the level, and then perform the
master-making operation again.
p.37
Clean the Glass Platen (and/or the
ADF Scanner Glass). p.97