How To Measure The Gap Between Color Lines - Gestetner B147 Service Manual

TROUBLESHOOTING GUIDE
How to measure the gap between color
lines
Use a magnification scope to measure the
gap [A] between two lines. Measure the
distance between the same sides of two lines.
For example (see the illustration), measure
between the left edges of the lines.
Pattern 1
Color shift in the sub-scan direction at the
leading edge
This illustration shows that the colored
(dotted) line is above the black line. This
means that the registration roller speed is too
high for the paper used. Therefore, the
registration roller speed needs to be reduced
by decreasing the setting (percentage) of
SP1-004-004, 005, and SP1-005-003
depending on the mode selected.
• SP1-004-004 Normal paper,
Color mode, 1200 dpi (62.5 mm/s)
• SP1-004-005 Normal Paper,
Color mode, 600 dpi (125 mm/s)
• SP1-005-003 Thick Paper (62.5 mm/s)
Pattern 2
Color shift in the sub-scan direction at the
trailing edge
This illustration shows that the colored
(dotted) line is above the black line. This
means that the fusing roller speed is too high
for the paper used. Therefore, the fusing
roller speed needs to be slower by
decreasing the setting (percentage) of SP1-
004-001, 002, or 007 depending on the
mode selected.
• SP1-004-001 Normal paper,
Color mode, 1200 dpi (62.5 mm/s)
• SP1-004-002 Normal Paper,
Color mode, 600 dpi (125 mm/s)
• SP1-004-007 Thick Paper (62.5 mm/s)
B147/B149/B190
A
Magnification
scope
4-76
A
Black
line
Color
B146T908.WMF
line
B146T909.WMF
B146T913.WMF
SM