Sharp MX-4100N Service Manual page 89

ADJ 18
Copy image position,
image loss adjustment
18-A Copy image position, image loss
adjustment (Document table mode)
This adjustment is needed in the following situations:
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* When the LSU is replaced or removed.
* When the registration roller section is disassembled.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
* The scanner control PWB has been replaced.
* The EEPROM on the scanner control PWB has been replaced.
NOTE: Before executing this adjustment, be sure to confirm that
the ADJ 17 Print area (Void area) adjustment (Print engine
section) has been completed normally.
1) Place a scale on the document table as shown in the figure
below.
Place a scale so that it is in parallel with the scanning direction
and that its lead edge is in contact with the document guide
plate.
Place white paper on the document table so that the scale lead
edge can be seen.
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
2) Go through the modes specified in Simulation 50-1.
OK
MX-5001N ADJUSTMENTS 5 – 47
3) Set RRCA, LEAD, and SIDE to the default values.
Display/Item
A Lead RRCA
edge
adjust-
ment
B RRCB-CS12
value
C RRCB-CS34
D RRCB-LCC
RRCB-MFT
E
F RRCB-ADU
G Image LEAD
loss area
setting
H SIDE
value
I Void area DENA
adjust-
ment
J DENB
K FRONT/
REAR
L Off-center OFSET_OC
adjust-
ment
M Magnifica SCAN_
tion ratio SPEED_OC
correction
Sub DENB-MFT
N
scanning
direction
DENB-CS1
O
print area
correction
DENB-CS2
P
value
DENB-CS3
Q
Sub DENB-CS4
R
scanning
direction
S DENB-LCC
print area
DENB-ADU
correction
T
value
4) Perform the image lead edge reference position adjustment.
Press [CLOSE] key, and shift from the simulation mode to the
copy mode and make a copy in 100% mode and in 200%
mode.
When the adjustment value of RRCA is proper, the lead edge
image from 3.0mm is not copied in either of 100% and 200%
copy scale.
If not, change and adjust the RRCA value.
(Adjust so that the lead edge image from 3.0mm is not copied
in either of different copy magnification ratios.)
Repeat the above procedures until a satisfactory result is
obtained.
Scale image 3.0mm position
Paper lead
edge
5mm 10mm
5mm
Setting
Content
range
Document lead edge 0 - 99
reference position
(OC)
Standard 1 - 99
Tray
Resist
Desk 1 - 99
motor ON
LCC 1 - 99
timing
Manual 1 - 99
adjust-
paper
ment
feed
ADU 1 - 99
Lead edge image 0 - 99
loss area setting
Side image loss area 0 - 99
adjustment
Lead edge void area 1 - 99
adjustment
Rear edge void area 1 - 99
adjustment
FRONT/REAR void 1 - 99
area adjustment
OC document off- 1 - 99
center adjustment
SCAN sub scanning 1 - 99
magnification ratio
adjustment (CCD)
Manual feed 1 - 99
correction value
Tray 1 correction
1 - 99
value
Tray 2 correction
1 - 99
value
Tray 3 correction
1 - 99
value
Tray 4 correction
1 - 99
value
LCC correction value 1 - 99
ADU correction value 1 - 99
100%
200%
10mm
De-
fault
50
50
50
50
50
50
30
20
30
30
20
50
50
50
50
50
50
50
50
50