savin
Field Engineering Bulletin
Digital Color Series
TECHNICAL OPERATIONS
SDC206
-
011
BULLETIN NO:
SDC206/E
-
011 DATE:
IO/28197
I
Subject: Cyan Toner Blasting in Printer Mode
I
q
Copy Quality
Model
-
Product/Serial Numbers Affected
Modification
Schedule
0
Electrical
SDC206
5A97030001
0
Mandatory
/-J
Mechanical
0
Scheduled Visit
,
0
Modification
SDC206/E
5A87030001
0
Next Call
0
Safety Information
0
Next PM
0
Technical Information
[7
As Necessary
a
General Information
Install Time
Symptom
Cyan toner scattered (“blasting”) around the text and edge of solid image in printer mode.
Cause
The PTL light (red light) is blocked by the cyan toner. The electrical potential of the image area does
not drop while potential on the bare drum surface drops. As a result, some toner is attracted to
the
bare drum surface. See below figure.
Before PTL Emission
After PTL Emission
toner
bare
drum-
VD drops to the bare drum potential level, however VL does not drop to the same level since
the
PTL
light is blocked by cyan toner.
The symptom is most evident when amount of toner on the drum (M/A) is large. The symptom is
seen only in the printer mode since the maximum amount of toner on the drum is higher compared to
that of the copy mode.
Compared
to
the
SC106,
the
SDC206/E
has
a
higher M/A for cyan. This results in a higher level of
Cyan Toner scattering.
Savin Corporation
Page 1 of
2
Technical Service Operations
-
P.O. Box 10270, Stamford, Connecticut 06904
-
(203) 96745000
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