Ratio Adjustment - Sharp AR-BC260 Service Manual

12) Make a copy, and check the copy magnification ratio.
If the copy magnification ratio is outside the range of 100% ± 1%,
repeat procedures 9) to 11) until it is in the range.
Note: Due to the structure of the optical system, when the CCD
unit fixing position is changed with SIM 48-1 set to 50, the
copy magnification ratio is adjusted to the specified level
(100 ± 1.0%) and the specified resolution is provided.
ADJ 8 Sub scanning direction copy
magnification ratio adjustment
This adjustment must be performed in the following cases:
• When the copy magnification ratio in the copy image sub scan-
ning direction is improper.
• When the scanner motor is replaced.
• When a U2 trouble occurs.
• When the MFP main PWB is replaced.
• When the EEPROM of the MFP main PWB is replaced.
Before this adjustment, perform the focus adjustment (CCD unit
installing position adjustment).
1) Place a scale on the original table as shown below.
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
2) Enter the SIM 48-1 mode.
3) Make a normal copy and obtain the copy magnification ratios.
Copy magnification ratio
(Original dimension – Copy dimension)
=
Original dimension
(Example 1)
Copy A
10 20
(Shorter than
the original)
Scale
10 20
(Original)
(Example 2)
Copy B
10 20
(Longer than
the original)
x 100 [%]
90 100 110
90 100 110
90 100 110
AR-BC260 SETTING AND ADJUSTMENTS 8 - 19
4) Check that the copy magnification ratio is within the specified
range (100 ± 1.0%).
If the copy magnification ratio is within the specified range
(100 ± 1.0%), the adjustment is completed.
If not, perform the following procedure.
5) Change the scan mode adjustment value of SIM 48-1.
When the adjustment value is increased, the sub scanning
direction copy magnification ratio is increased.
A change in the adjustment value by 1 corresponds to a
change in the copy magnification ratio by about 0.1%.
Repeat procedures 3) to 5) until the coy magnification ratio is
within the specified range (100 ± 0.28%).
Note: Fix the adjustment value of SIM 48-1 adjustment mode (F –
R) to 50.
ADJ 9 Main scanning direction copy
image position adjustment
(Scanner (reading) section)
This adjustment must be performed in the following cases:
When the scanner (reading) section is disassembled.
When the scanner (reading) unit is replaced.
When the RSPF section is disassembled.
When the RSPF unit is installed.
When the RSPF unit is replaced.
When a U2 trouble occurs.
When the MFP main PWB is replaced.
When the EEPROM of the MFP main PWB is replaced.
1) Make a copy in the adjustment chart adjustment mode. (Docu-
ment table or RSPF)
2) Check the copy image center position.
If A – B = ± 1.0mm, there is no need to adjust.
If the above condition is not satisfied, perform the following
procedures.
3) Enter the SIM 50-12 mode.
4) Select the adjustment mode with the scroll key.
5) Enter the adjustment value with the 10-key and press the [OK]
key.
The entered value is set.
∗ When the set value is increased, the main scanning print posi-
tion is shifted by 0.1mm to the front side.
Repeat procedures 2) to 5) until the above condition is satisfied.
A
A – B = 1.0mm
(100%)
B