Sharp AR-RP3, Service Manual

Page: 7 / 22

3. Document size detection
1) Document size detection with the document set tray
When documents are set on the document set tray in the auto selec-
tion mode of paper/copy magnification ratio, the document size is
detected and paper and the copy magnification ratio are automatically
selected. When different sizes of documents are set, the max. size is
detected. The document width is detected by the document width
sensors (W1, W2, W3), and the document length is detected by the
document length sensors (L1, L2) to identify the document size.
Judgement of the document size is made in a certain timing after
detecting the document with the document set sensor (W0).
Document set
size and set
direction
Document width sensor
Document
length sensor
W1 W2 W3 L1 L2
AB
series
A5
B5
A5R
A4
B5R
A4R
8.5 x 13"
B4
A3
Inch
series
8.5" x 5.5"
8.5" x 5.5"R
11" x 8.5"
11" x 8.5"R
8.5" x 13"
8.5" x 14"
11" x 17"
(Note) Detection sensor ON: , OFF:
[6] ADJUSTMENTS
(1) SPF auto white correction pixel adjustment
[Function]
The SPF white correction start pixel position is automatically adjusted.
This adjustment is performed after the lens unit is replaced.
(2) RSPF magnification ratio adjustment
Note : When performing this adjustment, check that the CCD unit
is properly installed.
: When performing this adjustment, check that the OC mode
adjustment in copying is completed.
1) Place a scale on the document table as shown below, and make a
normal copy to make a test chart.
2) Set the test chart to the SPF and make a normal copy.
3) Compare the copy and the test chart.
If an adjustment is needed, perform the following procedures.
4) Execute SIM 8-1. The auto exposure lamp lights up.
Sim63-7 SPF ADJ.
WHITE ADJUST
PRESS OK KEY EXEC
Sim63-7 SPF ADJ.
WHITE ADJUST
EXEC
Sim63-7 SPF ADJ.
WHITE ADJUST
CPMPLETE
[160]
PRESS OK KEY EXEC
Sim63-7 SPF ADJ.
WHITE ADJUST
ERROR
[ 0]
PRESS OK KEY EXEC
Press
the [OK] key.
Press
the [RETURN] key.
[Operation]
(Initial screen)
(During execution)
(Initial screen with the execution result displayed)
Normal end Abnormal end
During execution,
"EXEC" is highlighted.
Open the SPF unit and press the [OK] key.
[ ] indicates the order number of the pixel of the white
sheet for SPF exposure correction in the SPF position.
W h e n t h e a d j u s t m e n t i s c o m p l e t e d n o r m a l l y ,
"COMPLETE" is displayed, and data are written into the
EEPROM.
W h e n t h e a d j u s t m e n t i s c o m p l e t e d a b n o r m a l l y ,
"ERROR" is displayed and data are not written into the
EEPROM.
The SPF white correction start pixel = Displayed
pixel position - 34
If the simulation is executed with the SPF unit
closed, an error is resulted.
[CA] key: Cancels the test command.
[Interruption] key: Shifts to the sub code entry menu.
[OK] key: Shifts to the execution menu.
Interruption is inhibited during execution.
Note: Since the printed paper is used as the test chart,
place the scale in parallel to both sides.