Sharp AR-C150, Service Manual

Page: 89 / 214

Check that the following simulation values are in the specified range. If not, troubleshoot the cause and readjust.
SIM
No
ITEM
SPEC
Phenomenon caused when the adjustment value is not in the normal
value range.
NOTE
Default Standard value
44-2 DMGNDY —
185
±
10 / 0 to 255
Improper adjustment of OPC drum phase Image color shift,
banding, F2-50 – 57 Check the
sections related to
the OPC drum
and the OPC
drum mark sensor.
DMGNDM —
DMGNDC —
DMGNDK —
MKY/GND —
30 to 70
MKM/GND —
MKC/GND —
MKK/GND —
PCLEDC —
0 to 255
Because of improper image sensor sensitivity
adjustment, the process correction (high density
section image density correction) is not
performed properly, resulting in improper
parameters of the voltage, the current, and the
laser power of the process section. / Because of
improper half-tone process correction, the laser
ON duty becomes improper. Improper image
density, improper
copy, abnormal copy,
chip on the edge of
half-tone image, tone
gap, improper color
balance / Errors
F2-44 – 45, 80 – 90 Check the
sections related to
the transfer belt
and the image
density sensor.
PCLEDK —
P_BK_B
—
SIM44-4
(PCS_B_TARGET_ID)
±
2 / 0 to 255
P_CY
—
SIM44-13 (P_CYI)
±
2 / 0 to 255
Check the following simulation values are in the specified range. If not, set the values to the specified range.
SIM
No
ITEM
SPEC
Phenomenon cause when the set value is changed
Phenomenon caused when the
set value is not in the normal
value range
NOTE
Default
Standard
value
44-4 PCS_C_TARGET_ID
102 —
Change in the color image sensor sensitivity (When
the set value is increased, the image density is
decreased. When the set value is decreased, the
image density is increased.) Because of improper image
sensor sensitivity adjustment, the
process correction (high density
section image density correction)
is not performed properly,
resulting in improper parameters
of the voltage, the current, and
the laser power of the process
section. / Because of improper
half-tone process correction, the
laser ON duty becomes improper.
Improper image density, improper
copy, abnormal copy, chip on the
edge of half-tone image, tone
gap, improper color balance /
Errors F2-44 – 45, 80 – 90
PCS_B_TARGET_ID
133 —
Change in the black image sensor sensitivity (When
the set value is increased, the image density is
increased. When the set value is decreased, the
image density is decreased.)
Y_PAT_TARGET_ID
90 —
Change in the process correction (Yellow image high
density section image density correction) level (When
the set value is increased, the image density in the
high density section is increased and abnormal copy
is decreased. When the set value is decreased, the
image density in the high density section is
decreased and abnormal copy is increased.) Color image high density section
abnormal copy, improper image
density, improper copy, improper
color balance, toner dispersion,
developer dispersion
M_PAT_TARGET_ID
100 —
Change in the process correction (Magenta image
high density section image density correction) level
(When the set value is increased, the image density
in the high density section is increased and abnormal
copy is decreased. When the set value is decreased,
the image density in the high density section is
decreased and abnormal copy is increased.)
C_PAT_TARGET_ID
83 —
Change in the process correction (Cyan image high
density section image density correction) level (When
the set value is increased, the image density in the
high density section is increased and abnormal copy
is decreased. When the set value is decreased, the
image density in the high density section is
decreased and abnormal copy is increased.)
K_PAT_TARGET_ID 15 (AR-
C100/
C150)
22 (AR-
C160/
C250/
C270)
—
Change in the process correction (Black image high
density section image density correction) level (When
the set value is increased, the image density in the
high density section is decreased and abnormal copy
is increased. When the set value is decreased, the
image density in the high density section is increased
and abnormal copy is decreased.) Black image high density section
abnormal copy, improper image
density, improper copy, improper
color balance, toner dispersion,
developer dispersion
7 – 35