Half-Tone Process Control 2Nd Patch Error (Black); Half-Tone Process Control 2Nd Patch Error (Cyan) - Sharp AR-BC260 Service Manual

Main Sub Half-tone process control 2nd
Title
code code patch error (Black)
F2 84 Display Lamp/Message
Phenomenon Detail
Section
Common Check
Case 1 Cause
Check &
Remedy
Case 2 Cause
Check &
Remedy
2nd step of execution of
half-tone process control.
When connecting the
approximation formula (the
relationship of sensor
output ratios for the print
gradation values) in the low-
density section and that in
the high-density section
obtained from the patch
print result, DUTY1 for 20%
of output ratio in the low-
density section is greater
than DUTY2 for 25% of
output ratio in the high-
density section.
<The trouble is saved in the
trouble history, but F2
trouble is not displayed. The
operation is made with the
previous correction value.>
—
Use SIM 44-2 to adjust the
process control sensor
gain.
When "Error" occurs in the
gain adjustment of SIM 44-
2:
1. Disconnection of the
harness between the
PCU PWB and the
image density sensor.
2. Image density sensor
dirt/trouble
1. Check connection of the
harness between the
PCU PWB and the
image density sensor.
2. Clean/replace the image
density sensor.
When SIM 44-2 gain
adjustment is completed:
Insufficient cleaning of the
transfer belt, calibration
plate solenoid operation
trouble
Check the drum surface
and the belt surface.
AR-BC260 TROUBLESHOOTING 11 - 16
Main Sub Half-tone process control 2nd
Title
code code patch error (Cyan)
F2 85 Display Lamp/Message
Phenomenon Detail
Section
Common Check
Case 1 Cause
Check &
Remedy
Case 2 Cause
Check &
Remedy
2nd step of execution of
half-tone process control.
When connecting the
approximation formula (the
relationship of sensor
output ratios for the print
gradation values) in the low-
density section and that in
the high-density section
obtained from the patch
print result, DUTY1 for 20%
of output ratio in the low-
density section is greater
than DUTY2 for 25% of
output ratio in the high-
density section.
<The trouble is saved in the
trouble history, but F2
trouble is not displayed. The
operation is made with the
previous correction value.>
—
Use SIM 44-2 to adjust the
process control sensor
gain.
When "Error" occurs in the
gain adjustment of SIM 44-
2:
1. Disconnection of the
harness between the
PCU PWB and the
image density sensor.
2. Image density sensor
dirt/trouble.
1. Check connection of the
harness between the
PCU PWB and the
image density sensor.
2. Clean/replace the image
density sensor.
When SIM 44-2 gain
adjustment is completed:
Insufficient cleaning of the
transfer belt, calibration
plate solenoid operation
trouble
Check the drum surface
and the belt surface.