Half Tone Process Control 2Nd Patch Reference Value Trouble (Cyan); Half Tone Process Control 2Nd Patch Reference Value Trouble (Magenta); Half Tone Process Control 2Nd Patch Reference Value Trouble (Yellow); High-Density Process Control Density Correction Error (Cyan) - Sharp MX-2300 G Service Manual

F2-85 Half tone process control 2nd patch
reference value trouble (CYAN)
Trouble content The low-density section output is greater than the
middle-density section output when connecting the
low-density section approximation formula and the
middle-density section approximation formula
(formula of the sensor output ratio for the LSU PWM
value) from the second step patch print result when
executing the half tone process control in CYAN.
Section PCU
Case 1 Cause Image density sensor trouble, harness connection
trouble between PCU sub PWB and the image density
sensor, image density sensor dirt, transfer belt
cleaning trouble
Check Use SIM44-2 to execute the process control gain
and adjustment. If "ERROR" is displayed, check the
remedy sensor and the harness. If the adjustment is
completed, check the drum surface state and the belt
surface state.
F2-86 Half tone process control 2nd patch
reference value trouble (MAGENTA)
Trouble content The low-density section output is greater than the
middle-density section output when connecting the
low-density section approximation formula and the
middle-density section approximation formula
(formula of the sensor output ratio for the LSU PWM
value) from the second step patch print result when
executing the half tone process control in MAGENTA.
Section PCU
Case 1 Cause Image density sensor trouble, harness connection
trouble between PCU sub PWB and the image density
sensor, image density sensor dirt, transfer belt
cleaning trouble
Check Use SIM44-2 to execute the process control gain
and adjustment. If "ERROR" is displayed, check the
remedy sensor and the harness. If the adjustment is
completed, check the drum surface state and the belt
surface state.
F2-87 Half tone process control 2nd patch
reference value trouble (YELLOW)
Trouble content The low-density section output is greater than the
middle-density section output when connecting the
low-density section approximation formula and the
middle-density section approximation formula (formula
of the sensor output ratio for the LSU PWM value)
from the second step patch print result when
executing the half tone process control in YELLOW.
Section PCU
Case 1 Cause Image density sensor trouble, harness connection
trouble between PCU sub PWB and the image density
sensor, image density sensor dirt, transfer belt
cleaning trouble
Check Use SIM44-2 to execute the process control gain
and adjustment. If "ERROR" is displayed, check the
remedy sensor and the harness. If the adjustment is
completed, check the drum surface state and the belt
surface state.
MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 20
F2-92 High-density process control density
correction error (CYAN)
Trouble content The patch density value is not in the range of the
density correction reference density value (STD
value) ±30% at the upper limit or the lower limit bias
voltage when executing the high density process
control.
Section PCU
Case 1 Cause Image density sensor trouble, harness connection
trouble between PCU PWB-image density sensor, dirt
on image density sensor, transfer belt cleaning trouble
Check 1) Use SIM44-2 to execute the process control
and sensor gain adjustment.
remedy 2) If an error occurs, check the sensors and the
harnesses.
3) If the adjustment of 1) is completed, check the
drum surface state, the belt surface state, etc.
F2-93 High-density process control density
correction error (MAGENTA)
Trouble content The patch density value is not in the range of the
density correction reference density value (STD
value) ±30% at the upper limit or the lower limit bias
voltage when executing the high density process
control.
Section PCU
Case 1 Cause Image density sensor trouble, harness connection
trouble between PCU PWB-image density sensor, dirt
on image density sensor, transfer belt cleaning trouble
Check 1) Use SIM44-2 to execute the process control
and sensor gain adjustment.
remedy 2) If an error occurs, check the sensors and the
harnesses.
3) If the adjustment of 1) is completed, check the
drum surface state, the belt surface state, etc.
F2-94 High-density process control density
correction error (YELLOW)
Trouble content The patch density value is not in the range of the
density correction reference density value (STD
value) ±30% at the upper limit or the lower limit bias
voltage when executing the high density process
control.
Section PCU
Case 1 Cause Image density sensor trouble, harness connection
trouble between PCU PWB-image density sensor, dirt
on image density sensor, transfer belt cleaning trouble
Check 1) Use SIM44-2 to execute the process control
and sensor gain adjustment.
remedy 2) If an error occurs, check the sensors and the
harnesses.
3) If the adjustment of 1) is completed, check the
drum surface state, the belt surface state, etc.
F3-12 Main unit tray 1 lift-up trouble
Trouble content LUD1 does not turn ON within the specified time.
Section PCU
Case 1 Cause LUD1 sensor trouble, harness connection trouble
between PCU PWB, the lift-up unit, and the paper
feed unit.
Check Check the harness and the connector of LUD1.
and
remedy
Case 2 Cause Tray 1 lift-up motor trouble
Check Check the lift-up unit.
and
remedy