Gestetner B147 Service Manual page 279

Pattern 3
Color shift (magnification change) in the main-scan direction
Fig. 1 and 2 show that the colored (dotted) line has shifted away from the black line
and the amount of shift differs at the front, center, and rear. Both Fig. 1 and Fig. 2
show the color grid is larger than the black grid. Yellow becomes larger from left to
right in Fig. 1, but cyan and magenta become larger from right to left. This is
because the laser writing direction for B&Y is different from C&M.
Fig. 1 (Yellow)
Pattern 4
Color shift (registration) in the main-
scan direction
Colored line shifts in the main-scan
direction and the amount of shift is the
same at left, center, and right.
This is caused by incorrect color
registration.
SM
B146T911.WMF
Fig. 2 (Cyan & Magenta)
4-77
TROUBLESHOOTING GUIDE
B146T910.WMF
B146T912.WMF
B147/B149/B190