Image Registration Adjustment - Sharp MX-2300 G Service Manual

6) Select the paper feed mode adjustment item (B – H) to be
adjusted with the scroll key.
7) Change the adjustment value.
Enter the adjustment value and press [OK] or [EXECUTE] key.
When [EXECUTE] key is pressed, the adjustment pattern is
printed.
When the adjustment value is increased, the adjustment pat-
tern is shifted to the front frame side. When it is decreased, the
adjustment pattern is shifted to the rear frame side.
When the set value is changed by 1, the shift distance is
changed by about 0.1mm.
Repeat procedures 3) – 7) until the conditions of procedure 5)
are satisfied.
In case a satisfactory result cannot be obtained by repeating
the above procedures, perform the following procedure.
8) Loosen the paper feed tray off-center adjustment screws (2
pcs.) at the center section of the lift plate of the paper feed tray,
and change the gear unit position in the front/back frame direc-
tion. Repeat the adjustment procedures from 4).
10
Image registration adjustment (Print
engine section)
This adjustment must be executed in the following cases:
* When the LSU (writing) unit is replaced.
* When the LSU (writing) unit is removed from the main unit.
* When the color image registration mistake in the main scanning
direction occurs.
* When the color image registration mistake in the sub scanning
direction occurs.
* When the unit is installed or when the installing place is changed.
* When maintenance is executed. (Replacement of the OPC drum,
the OPC cartridge, the transfer unit, the transfer belt, etc.)
* When [ADJ8] print engine image magnification ratio (BK) (main
scanning direction) is performed.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
■ Note before adjustment
(Before execution of this adjustment, all the following adjustments
must have been completed.)
* Image skew adjustment (LSU (writing) unit)
* Print engine image magnification ratio adjustment (BK) (Main
scanning direction) (Print engine section)
10-A Image registration adjustment (Main scan-
In this adjustment, the image registration adjustment in the main
scanning direction and that in the sub scanning direction are exe-
cuted simultaneously and automatically.
1)
2)
3)
REGIST
MX-2300/2700 N/G ADJUSTMENTS 6 – 15
ning direction, sub scanning direction)
(Auto adjustment)
Enter SIM50-22 mode.
SIMULATION NO.50-22
TEST
AUTO ADJUSTMENT OF REGISTRATION & DLUM POSITION
,MAIN F MAIN R SUB
C xxx (x) xxx (x) xxx (x)
M xxx (x) xxx (x) xxx (x)
Y xxx(x) xxx (x) xxx (x)
REGIST DRUM POS ALL
EXECUTE
SIMULATION NO.50-22
TEST
AUTO ADJUSTMENT OF REGISTRATION & DLUM POSITION
NOW EXECUTING...
Abnormal end
SIMULATION NO.50-22
TEST
AUTO ADJUSTMENT OF REGISTRATION & DLUM POSITION
PRESS [EXECUTE] TO START
ERROR TONNER EMPTY
Press [REGIST] key to select the image registration adjust-
ment auto adjustment mode.
Press [EXECUTE] key.
[EXECUTE] key is highlighted and the image registration auto
adjustment is started. After completion of the adjustment,
[EXECUTE] key returns to the normal display and the adjust-
ment result is displayed.
It takes about 40 sec to complete the adjustment.
Display/Item Content
MAIN C Image registration
F adjustment value (Main
scanning direction)
(Cyan) (F side)
M Image registration
adjustment value (Main
scanning direction)
(Magenta) (F side)
Y Image registration
adjustment value (Main
scanning direction)
(Yellow) (F side)
0
CLOSE
PHASE
xxx (x)
EXECUTE
1/1
Normal end
0
CLOSE
EXECUTE
0
CLOSE
EXECUTE
Adjustment Default
value range value
1.0 – 199.0 100
1.0 – 199.0 100
1.0 – 199.0 100