Sharp AR-BC320, Руководство по обслуживанию, Страница: 113 / 344

AR-BC320 SETTING AND ADJUSTMENTS 8 - 6
1) Enter the SIM44-2 mode.
2) Press the [EXECUTE] key.
The adjustment is performed automatically. When the adjust-
ment is completed, the adjustment result is displayed and the
the [EXECUTE] key display returns to the original state.
If the adjustment is not completed normally, "ERROR" is dis-
played.
In that case, check the following sections for no abnormality. If
there is any abnormality, repair the part and perform the adjust-
ment again.
In case of an error, the adjustment result is not revised.
• Image density sensor
• PCU PWB
• Transfer belt
(1) LED print engine image focus adjustment (LED
(writing) unit)
This adjustment must be performed in the following cases:
• When the scanner (writing) unit is replaced.
• When the scanner (writing) unit is removed from the machine.
• When the print image is shifted.
(Especially conspicuous for text and line drawings)
(The scanner (reading) unit is normal, but the print image focus
of the print engine is not normal.)
• When there is uneven density in the main scanning direction.
• When the color balance adjustment does not result in proper
color matching.
• When in installation or when the installing site is changed. (Nec-
essary depending on the case)
1) Execute the process correction forcibly. (SIM44-6)
This simulation is used to correct the print density of the
adjustment pattern.
2) Enter the SIM 61-4 mode.
SIM 61-4
3) Set the items A, B and C according to the table below.
4) Select the A4 (11 x 8 1/2) paper feed tray.
5) Press the [EXECUTE] key.
The focus adjustment pattern is printed.
6) Check the printed focus adjustment pattern for each color.
If focus is proper, the half-tone belts are printed properly.
When four or five half-tone belts of each color are printed and
there is no density difference in the main scanning direction
(back and forth), the focus is proper both on the front and the
back sides.
ADJ 2B Black image density sensor
adjustment
Display Content
Min
Value
Max
Value
Default
value
A PCS_C
LED ADJ
Color image density
sensor LED current
adjustment value 1 255 51
B PCS K
LED ADJ
Black image density
sensor LED current
adjustment value 1 255 51
C PCS_K
GAIN
Black image density
sensor output gain
(AMP) adjustment value 0 15 0
D PCS_K
DARK
Black image density
sensor dark voltage level 0 255 0
E PCS_K
GRND
Black image density
sensor transfer belt
surface detection level 0 255 0
F BELTMAX Transfer belt surface
max. detection level
(Black image sensor)
0 255 0
G BELTMIN Transfer belt surface
min. detection level
(Black image sensor) 0 255 0
H BELTDIF Difference between the
max. value and the min.
value of the transfer belt
surface detection level
(BELTMAX-BELTMIN) 0 255 0
ADJ 3 Image focus, image skew
adjustment (LED (writing) unit)
Parameter Set value
A PRINT PATTERN 2
B DENSITY 7
C POSITION 6
Check that the half-tone belts of each color are printed
in good balance.
Front side
Paper exit
direction