Sharp MX-4100N Service Manual page 61

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/rear frame direc-
tion. Repeat the adjustment procedures from 4).
ADJ 10
Image registration adjustment
(Print engine section)
This adjustment is needed in the following situations:
* When the color shift occurs.
* 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 work is performed. (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.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
Note before adjustment
(Before execution of this adjustment, all the following adjustments
must have been completed.)
* Image skew adjustment (LSU (writing) unit)
* [ADJ8] print engine image magnification ratio (BK) (main scan-
ning direction) (print engine section)
10-A
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) Enter SIM50-22 mode.
2) Press [REGIST] key to select the image registration adjust-
ment auto adjustment mode.
3) 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.
MX-5001N ADJUSTMENTS 5 – 19
Image registration adjustment (Main
scanning direction, sub scanning direction)
(Auto adjustment)
E X ECUTE
Adjustment completed
Abnormal end