Gestetner B147, Service Manual

Page: 116 / 1081

IMAGE ADJUSTMENT
B147B149/B190 3-2 SM
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.
SP mode
Leading Edge Registration SP4-010-001
Side-to-Side Registration SP4-011-001
A
B146R962.WMF
B
A
B146R963.WMF
A: Sub-scan magnification
A: Leading Edge Registration
B: Side-to-side Registration