Sharp MX-C250 Service Manual page 47

Item/Display
Content
6 SUB- Registration moto
MFT ON timig adjust-
ment
7 SUB-CS1
8 SUB-
DSK
9 SUB-
ADU
When the adjustment value is increased, the void area is
increased. When the adjustment value is decreased, the void
area is decreased.
When the adjustment value is changed by 1, the void area is
changed by 0.1mm.
When the amount of the rear edge void is different between
each paper feed tray, change the adjustment value of item
(DENB-XXX) in SIM50-1 and adjust.
The adjustment item (DENB) have a effect on the paper of all
paper feed tray.
That is, adjustment value of item (DENB-XXX) fine adjusts to
adjustment item (DENB) for each paper tray.
After execution of the above, perform procedures 1) - 4) to
check that the void area is within the specified range.
Though the lead edge void area adjustment value is proper, if
the lead edge void area is not within the specified range,
change the adjustment value of item (RRCB-XXX) in SIM 50-1.
The adjustment value and the actual void area are related as
follows:
Adjustment value/10 = shift amount
Repeat the above procedures until a satisfactory result is obtained.
4-C Print image position adjustment (Off-center
direction, Paper transport direction
adjustment)
This adjustment must be performed in the following cases:
* When the LSU is replaced or removed.
* When a paper tray is replaced.
* When the paper tray section is disassembled.
* When ADJ 2 Print engine image magnification ratio adjustment
(Main scanning direction) is performed.
* When the manual feed tray is replaced.
* When the manual feed tray is disassembled.
* When the duplex mode paper transport section is disassembled.
* When the registration roller section is disassembled.
* When the MFP PWB is replaced.
* U2 trouble has occurred.
Before execution of this adjustment, check to insure the following
item.
* The print image magnification ration adjustment (ADJ 5A) (main
scanning direction) (Print engine) (Manual adjustment) has been
properly adjusted.
1) Set A4 (11" x 8.5") paper in the paper feed tray selected .
2) Put the servicing color test chart (UKOG-0326FCZZ/UKOG-
0326FC11) on the document glass.
Then, press [EXECUTE] key. The adjustment pattern is
printed.
3) Check that the adjustment pattern image is printed in the cor-
rect position.
Set-
Default
ting
value
range
MFT 1 - 99 60
CS1 1 - 99 60
DSK 1 - 99 50
ADU 1 - 99 50
MX-C250 ADJUSTMENTS 5 – 13
Measure the dimension of the void area shown in the figure in
the off-center and the paper transport direction of the adjust-
ment pattern, and check that all the following conditions are
satisfied.
Off-center direction + Paper transport direction +/- 4.0mm
Off-center direction = 2.0 +/- 2.0mm
Paper transport direction = 2.0 +/- 2.0mm
If the above requirement is not met, do the following steps.
4) Enter SIM 50-10 mode.
Sim50-10 PAPER OFFSET
1 BK-MAG
2 MAIN-MFT
3 MAIN-CS2
1 / 3 [ 60/ 140]
Sim50-10 PAPER OFFSET
1 BK-MAG
2 MAIN-MFT
3 MAIN-CS2
1 / 3 [ 60/ 140]
5) Select the target paper feed tray (MAIN-XX) with the [UP] and
[DOWN] keys.
Display/Item Content
NO Not select
6) Change the adjustment value.
Enter the adjustment value and press the [OK] key .
When [OK] 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) - 6) until the conditions of procedure 5)
are satisfied.
100
50
50
100
101
50
50
101
Setting range
1