Sharp AR-C150 Service Manual page 88

Perform the following procedures.
JOB No WORK ITEM
ADJ M4 High ADJ 1 Main
voltage charger
adjustment grid
voltage
adjustment
ADJ 2 DV bias
voltage
adjustment
ADJ 3 Transfer
voltage
adjustment
ADJ M6 Image ADJ 1 Image
density density
sensor sensor
adjustment calibration
ADJ 2 Image
density
sensor
position
adjustment
Check that the following simulation values are in the specified range. If not, troubleshoot the cause and repair.
Display value at 25°C, 70%
SIM No ITEM
44-14 TEMPERATURE
HUMIDITY
Check that the following simulation values are normal. If not, troubleshoot the cause and repair.
SIM No ITEM
44-16 BLACK
(TONER CYAN
DENSITY)
MAGENTA
(1/3)
YELLOW
SIM No ITEM LV-ORG
44-16 BLACK
(ATC CYAN
SENSITIVITY
MAGENTA
REVISE)
YELLOW
(3/3)
Trouble caused by improper
SIM No
8-2 Improper image density (especially
in the high density section), improper
copy, image density section copy
abnormality, chip on the edge of
half-tone images
8-1 Improper image density, improper
copy, image density section copy
abnormality, chip on the edge of
half-tone images
44-30 Improper image density, half-tone
image section improper copy, high
density image section density
unevenness and improper copy, low
density inside image outline
44-13 Because of improper operation of
the process correction (high density
section image density correction),
parameters of the voltage, the
current, and the laser power of the
44-23
process section become improper to
cause improper image density,
improper copy, abnormal copy, chip
on the edge of half-tone image, tone
gap, improper color balance, etc. /
Error F2-44 – 45, 80 – 90
Phenomenon when the sensor operation is abnormal
(Reference value)
The process section
100 to 120 correction for change in
temperature/humidity is not
performed. (Toner density,
transfer voltage, resist roller
35 to 45
RPM corrections)
LAST(BUP) LEVEL
DV HUD
adjustment
If the digital
multi-meter
and the
high
voltage
probe
specified
on the
Service
Manual are
not
available,
set the
adjustment
value to the
default.
(Improper color balance,
abnormal copy, improper copy,
toner dispersion, improper
image density, image deflection,
image dirt, decreased density
inside image outline)
Phenomenon caused by
improper set value
Improper image density,
improper copy, improper color
balance, toner dispersion,
developer dispersion
Phenomenon caused by improper
LV
set value
Toner density Improper image
correction is density, improper
nor performed copy, improper
properly. color balance, toner
dispersion,
developer dispersion
7 – 34
NOTE
Check and adjust when the high
voltage PWB (Main charger / DV
bias) is replaced. / Adjust when the
output is not in the specified level. /
Check and adjust when the
copy/print quality (density, color
balance) adjustment does not
provide a satisfactory result.
Check and adjust when the high
voltage PWB (Main charger / DV
bias) is replaced. / Adjust when the
output is not in the specified level. /
Check and adjust when the
copy/print quality (density, color
balance) adjustment does not
provide a satisfactory result.
Check and adjust when the high
voltage PWB (Transfer) is replaced.
/ Adjust when the output is not in the
specified level. / Check and adjust
when the copy/print quality (density,
color balance) adjustment does not
provide a satisfactory result.
Adjust when the copy/print quality
(density, color balance) adjustment
does not provide a satisfactory result
or when an error F2-44 – 45, 80 – 90
occurs.
NOTE
Check the relationship
between the actual
environment and the
sensor output level, and
check that the sensor is
operating properly.
NOTE
If the difference between LAST
(BUP) and LEVEL is extremely
great, the toner density control
may not function properly.
NOTE
The toner density
correction levels for the
use frequency of
developer and the humidity
are displayed. Check that
those levels are proper.