MX-C250 ADJUSTMENTS 5 – 5
2-A
Color image density sensor (image
registration sensor F), black image density
sensor (image registration sensor R)
adjustment
NOTE:
This adjustment executes automatically at the outset of
registration adjustment operation and process control oper-
ation as well as SIM44-2.
Normally, therefore, it is not required to perform this adjust-
ment. It is performed only when the sensor is replaced or
when the adjustment result is checked.
1)
Enter SIM44-2 mode.
2)
Press [START] key.
The color image density sensor (image registration sensor F),
the black image density sensor (image registration sensor R)
are automatically adjusted.
After completion of the adjustment, the adjustment result is
displayed and [EXECUTE] key returns to the normal display.
If the adjustment is not completed normally, "ERROR" is dis-
played.
When an error occurs, check the following sections for any
abnormality.
- Color image density sensor (image registration sensor F)
- Black image density sensor (image registration sensor R)
- MFP PWB
- Transfer belt (dirt, scratch)
- Transfer belt cleaner
- Color image sensor calibration plate
If any abnormality is found, repair and adjust again.
If an error occurs, the adjustment result is not revised.
ADJ 3
Image skew adjustment
(LSU unit)
This adjustment is needed in the following situations:
* When the color shift occurs.
* When the LSU unit is replaced.
* When the LSU unit is removed from the main unit.
* When a color image registration mistake occurs.
* When the unit is installed or when the installing site is changed.
(Required depending on the cases.)
* When there is an uneven density area or a difference in color
balance in the main scanning direction (back and forth).
* When the color phase is not matched by the color balance
adjustment.
* When the OPC drum drive unit is replaced.
* When the primary transfer unit is replaced.
The image skew adjustment (LSU unit) is performed by changing
the parallelism of the LSU unit scan laser beams for the OPC drum.
No Display/Item
Content
1
P_F_CL_ka
F side image sensor adjustment value
2
P_F LED ADJ
F side image sensor light emitting quantity
adjustment value
3
P_R LED ADJ
R side image sensor light emitting quantity
adjustment value
4
P_F_CL_DARK F side Dark voltage of color
5
P_F DARK
F side Dark voltage of sensor
6
P_R DARK
R side Dark voltage of sensor
7
P_F GRND
Belt base detection level when completion of
Item D adjustment
8
P_F BELT MAX Maximum value of belt base detection level
9
P_F BELT MIN
Minimum value of belt base detection level
10
P_R GRND
Belt base detection level when completion of
Item F adjustment
11
P_R BELT MAX Maximum value of belt base detection level
12
P_R BELT MIN
Minimum value of belt base detection level
Sim44-02 PROCON GAIN ADJ
Press OK Key EXEC
Sim44-02 PROCON GAIN ADJ
EXEC
Sim44-02 PROCON GAIN ADJ 1/6
P_F_CL_ka 348
P_F_LED_ADJ 37
P_R_LED_ADJ 36
P_F_CL_DARK 8
OK/START
Adjustment is finished.
13
REG_F BELT
MAX
Maximum value of belt base detection level
(F side)
14
REG_F BELT
MIN
Minimum value of belt base detection level (F
side)
15
REG_R BELT
MAX
Maximum value of belt base detection level
(R side)
16
REG_R BELT
MIN
Minimum value of belt base detection level
(R side)
17
REG_F
PATCH(K)
Patch detection level F for check (K)
18
REG_F
PATCH(C)
Patch detection level F for check (C)
19
REG_F
PATCH(M)
Patch detection level F for check (M)
20
REG_F
PATCH(Y)
Patch detection level F for check (Y)
21
REG_R
PATCH(K)
Patch detection level R for check (K)
22
REG_R
PATCH(C)
Patch detection level R for check C
23
REG_R
PATCH(M)
Patch detection level R for check (M)
24
REG_R
PATCH(Y)
Patch detection level R for check (Y)
Error display
Error content
CL_SEN_ADJ_ERR
Color image sensor adjustment abnormality
BK_SEN_ADJ_ERR
Black image density sensor adjustment
abnormality
P_F_CL_ka
F side image sensor adjustment abnormality
P_F_GRND
Belt base detection level when completion of
Item F adjustment abnormality
P_R_GRND
Belt base detection level when completion of
Item R adjustment abnormality
REG_F_LED_ADJ
Registration sensor F adjustment abnormality
REG_R_LED_ADJ
Registration sensor R adjustment abnormality
REG_F_GRND
Belt base detection level (F side) abnormality
REG_R_GRND
Belt base detection level (R side) abnormality