Sharp AR-RP7 Service Manual page 9

(4) RSPF image lead edge position adjustment
1) Set a scale on the OC table as shown below.
Note: Since the printed paper is used as the test chart, place the
scale in parallel to the front edge of the copy glass.
2) Make a copy, and use the copied paper as the document and make
a copy from RSPF again.
3) Check the copied paper. If an adjustment is required, perform the
following procedures.
4) Execute SIM 50-6.
5) Set the RSPF lead edge position set value so that the image similar
to the adjusted image at the OC image lead edge position
described previously is printed.
<Adjustment specifications>
Adjustment
SIM Set value
mode
Image SIM 50-6 1step: 0.1mm shift Lead edge void:
lead edge
position
(5) SPF scan position automatic adjustment
The SPF scan position is automatically adjusted.
1) With the SPF or the OC cover open, place a black background chart
on the OC glass. (The SPF standard model includes the SPF glass
surface.)
* Use a black chart UKOG-0011QSZZ, or make a chart as shown
below and use it.
Chart size: 310 x 470
Use a cutting sheet No. 791 (Black) or an equivalent for
making a chart.
Reason: To protect against erroneous detection caused by dis-
turbed lights of fluorescent lamps, etc.
2) Enter SIM 53-08, and press the COPY button.
Outline of SIM: The optical unit is moved to recognize the boundary
between the OS glass and the SPF glass. The SPF
scan position is automatically adjusted with the
boundary position as the reference.
Caution:
• After completion of the SPF scan position automatic adjustment,
perform the SPF lead edge adjustment (both surfaces).
• Place no other things than the black chart on the glass.
• Since SPF scan is made around the center in the main scanning
direction, take care not to allow external lights to enter the section.
3) Check that the lead edge is not shifted. (Both surfaces)
Set
Specification
range
1 ~ 99
1 ~ 4mm
Image loss:
3mm or less
AR-RP7 ADJUSTMENTS
– 8 –
(If the precedent lead edge adjustment was complete, the lead
edge follows automatically after changing the scan position.)
Place no other
things than the black
chart on the glass.
How to place the black chart
Cover this area.
For the SPF standard
machine, check that the SPF
glass is covered completely
by the black chart.