MX3500N SELF DIAG AND TROUBLE CODE 8 – 20
F2-84 Half tone process control 2nd patch
reference value trouble (BLACK)
F2-85 Half tone process control 2nd patch
reference value trouble (CYAN)
F2-86 Half tone process control 2nd patch
reference value trouble (MAGENTA)
F2-87 Half tone process control 2nd patch
reference value trouble (YELLOW)
F2-92 High-density process control density
correction error (CYAN)
F2-93 High-density process control density
correction error (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 BLACK.
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, transfer belt cleaning trouble
Check
and
remedy
Use SIM44-2 to execute the process control gain
adjustment. If "ERROR" is displayed, check the
sensor and the harness. If the adjustment is
completed, check the drum surface state and the belt
surface state.
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
and
remedy
Use SIM44-2 to execute the process control gain
adjustment. If "ERROR" is displayed, check the
sensor and the harness. If the adjustment is
completed, check the drum surface state and the belt
surface state.
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
and
remedy
Use SIM44-2 to execute the process control gain
adjustment. If "ERROR" is displayed, check the
sensor and the harness. If the adjustment is
completed, check the drum surface state and the belt
surface state.
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
and
remedy
Use SIM44-2 to execute the process control gain
adjustment. If "ERROR" is displayed, check the
sensor and the harness. If the adjustment is
completed, check the drum surface state and the belt
surface state.
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
and
remedy
1) Use SIM44-2 to execute the process control
sensor gain adjustment.
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.
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
and
remedy
1) Use SIM44-2 to execute the process control
sensor gain adjustment.
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.
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