Image Adjustment; Scanning; Scanner Sub-Scan Magnification; Scanner Leading Edge And Side-To-Side Registration - Gestetner B147 Service Manual

IMAGE ADJUSTMENT

3.2 IMAGE ADJUSTMENT

3.2.1 SCANNING

Before doing the following scanner adjustments, perform or check the printing
registration/side-to-side adjustment and the blank margin adjustment.
NOTE: Use a C4 test chart to perform the following adjustments.

Scanner sub-scan magnification

1. Place the test chart on the exposure glass and
make a copy from one of the feed stations.
2. Check the magnification ratio. Use SP4-008 to
adjust if necessary.
Standard: ±1.0%.

Scanner leading edge and side-to-side registration

1. Place the test chart on the exposure glass and make
a copy from one of the feed stations.
2. Check the leading edge and side-to-side registration,
and adjust them with the following SP modes if
necessary. Standard: 0 ± 2mm.
Leading Edge Registration
Side-to-Side Registration
B147B149/B190
SP mode
SP4-010-001
SP4-011-001
3-2
A
A: Sub-scan magnification
B146R962.WMF
A
B
B146R963.WMF
A: Leading Edge Registration
B: Side-to-side Registration
SM