Scanning; Scanner Sub-Scan Magnification; Scanner Leading Edge And Side-To-Side Registration - Ricoh TH-C1b Service Manual

10 February 2005

3.12.2 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 ± 2 mm.
Sub-scan
Main-scan
SP mode
SP4-010
SP4-011
3-61
COPY ADJUSTMENT
A
A: Sub-scan magnification
B156R293.WMF
A
B
B156R294.WMF