Ratio Adjustment; Print Engine - Sharp MX-1810U Service Manual

3-B Image density sensor adjustment
The image density sensor standard reflection plate and the transfer
belt surface are used to make the sensitivity adjustment of the color
image density sensor (image registration sensor F) and the black
image density sensor (image registration sensor R).
This adjustment executes automatically at the outset of registration
adjustment operation and process control operation as well as
SIM44-2.
Normally, therefore, it is not required to perform this adjustment. It
is performed only when the sensor is replaced or when the adjust-
ment result is checked.
1) Enter SIM44-2 mode.
2) Press [EXECUTE] key.
The sensitivity adjustments of the color image density sensor
(image registration sensor F) and the black image density sen-
sor (image registration sensor R) are automatically performed.
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.
Mode Error display
Adjustment BK_SEN_ Black image
value for ADJ_ERR density sensor
process adjustment
control abnormality
operation
CL_SEN_ Color image
mode
ADJ_ERR density sensor
adjustment
abnormality
BELT_READ_ Transfer belt
ERR surface
reading
abnormality
Adjustment REG_SEN_ Registration
value for F_ADJ_ERR sensor F
image adjustment
registration abnormality
operation
REG_SEN_ Registration
mode
R_ADJ_ERR sensor R
adjustment
abnormality
REG_BELT_ F side transfer
F_READ_ belt surface
ERR reading
abnormality
REG_BELT_ R side transfer
R_READ_ belt surface
ERR reading
abnormality
Error content
PCS_K LED ADJ error
(The target value is not
obtained after retried
three times.)
PCS_CL LED ADJ error
(The target value is not
obtained after retried
three times.)
PCS_K GRND error (The
surface detection level is
maximum or the minimum
value difference is outside
a reference range.)
REG_F LED ADJ error
(The target value is not
obtained after retried
three times.)
REG_R LED ADJ error
(The target value is not
obtained after retried
three times.)
REG_F GRND error (The
surface detection level is
maximum or the minimum
value difference is outside
a reference range.)
REG_R GRND error (The
surface detection level is
maximum or the minimum
value difference is outside
a reference range.)
MX-3610N ADJUSTMENTS AND SETTINGS 4 – 12
When an error occurs, check the following sections for any abnor-
mality.
• Color image density sensor (image registration sensor F)
• Black image density sensor (image registration sensor R)
• PCU PWB
• Transfer belt (dirt, scratch)
• Transfer belt cleaner
• Image density sensor standard reflection plate (dirt, scratch, dis-
coloration)
If any abnormality is found, repair and adjust again.
If an error occurs, the adjustment result is not revised.
ADJ 4
Image lead edge position,
image loss, void area, image
off-center, image magnification

ratio adjustment

(Automatic adjustment)
The following adjustment items can be executed automatically with
SIM50-28.
* ADJ 15
Print image position, image magnification ratio, void area, off-
center adjustment (Print engine) (Manual adjustment)
* ADJ 16
Scan image magnification ratio adjustment (Manual adjustment)
* ADJ 17
Scan image off-center adjustment (Manual adjustment)
* ADJ 18
Copy image position, image loss adjustment
(Manual adjustment)
(Menu in SIM50-28 mode)
Display/Item
OC ADJ Image loss off-center sub scanning direction image
magnification ratio adjustment (Document table mode)
BK-MAG ADJ Main scanning direction image magnification ratio
adjustment
SPF ADJ Image loss off-center sub scanning direction image
magnification ratio adjustment (RSPF mode)
SETUP/ Print lead edge adjustment, image off-center (each paper
PRINT ADJ feed tray, duplex mode) adjustment
RESULT Adjustment result display
DATA Display of data used when an adjustment is executed
4-A Print image main scanning direction
automatic magnification ratio adjustment

(Print engine)

1) Enter the SIM50-28 mode.
2) Select [BK-MAG ADJ] with the key.
Content