Ricoh pro c901 - Page 322

Technical Bulletin PAGE: 6/7
Reissued: 4-Aug-15
Model: Aries-P1.5/C1.5
Date: 27-Jan-12
No.: RM077072d
APPENDIX
Adjustments for further security
In order to achieve further security for toner scattering and development motor locking,
modify the relative parameters in the SP mode after carrying out “Procedures 1~3”.
Table: Notices and side effects concerning SP modification
SP modification
When NOT to
implement the SP
modification
Side effect
A)
Increasing the
toner refresh
threshold
SP3-701-002~004
SP3-701-006~008
Default: 6.0
Modified: 9.4
-
Toner yield will
decrease if average
image coverage ratio
is 4% or lower.
B)
Increasing the
Vtref lower
limit
SP3-004-005~008
Default: 1.4
Modified: 2.0
Do NOT implement
this SP modification if
high quality is
demanded for color
(hue) reproduction as
this modification will
decrease image
density. (*Note)
Image density will
decrease if the
ambient humidity is
low.
C)
Decreasing
the target
development
gamma
SP3-561-010~012
Default: 1.5
Modified: 1.3
-
Important: The above SP modifications should be carried out only for machines installed
in an environment where the relative humidity is not too low.
See the following page for details on these SP modifications.