Riso V8000 Series, Technical Manual

Page: 237 / 362

[13 - 19]
CHAPTER 13. AF SCANNING SECTION
Adjustment
1. AF Scanning-Start Position Adjustment
Checks and adjustment procedure
(1) Place A3 size printing paper on the paper feed tray. Make 1 to 1
size master using test chart No.11 through the AF unit., and
make prints.
(2) Examine the prints to confirm that the scanning start position is
at 5 mm ± 2 mm on the top vertical scale on the test chart No.11
printed image.
(3) If the AF scanning start position does not fall within above
specification, make an adjustment using
test mode No. 783
(AF Scan Start Position Adjustment).
Test chart No.11
2. AF Horizontal-Scanning Position Adjustment
Checks and adjustment procedure
(1) Place A3 size printing paper on the paper feed tray. Make 1 to 1
size master using test chart No.14 through the AF unit., and
make prints.
(2) Examine the master created on the print drum, and confirm that
the “e” images on the left and right of the original is not missing.
(3) If the “e” images are not made on the master, make adjustment
using
test mode No. 782 (AF Horizontal Scan Position
Adjustment).
Test chart No.14
3. AF Read Pulse-Motor Speed Adjustment (Image Elongation and
Shrinkage Adjustment)
Checks and adjustment procedure
(1) Place A3 size printing paper on the paper feed tray. Make 1 to 1
size master using test chart No.11 through the AF unit., and
make prints.
(2) Lay the print on top of the original to confirm that the image
elongation or shrinkage is within ±1.0% at the 350-mm line of
the test chart image.
(3) If the elongation and shrinkage does not fall within this
specification, make an adjustment using
test mode No. 784
(AF Scanning speed Adjustment).
* Prior to this adjustment, make sure to do the image elongation
and shrinkage adjustment in master making, first. (Refer to
Chapter-14, page No.14-23)
Test chart No.11