Gestetner G060 Service Manual page 157

Rev. 09/2003
Direction Area Symptom
Sub-scan Entire Color shift on the
image entire image, and
the amount of shift
from leading to
trailing edge is
almost the same.
SM
Action Required
Possible Cause
Output Mode
SP mode setting Normal Paper
is not suitable for
600 dpi
the paper used.
Normal Paper
1200 dpi
4-43
Procedure / Remarks
SP Mode
SP5-993- Measure the gap between the black line and other
016 (Y) colors (YMC) using a magnification scope.
Convert the measured value from [µm] to [dots] with the
SP5-993-
following formula. Then, add or subtract the calculated
017 (M)
dot value in the SP mode.
SP5-993-
Correction [dots] = Measured value [µm] / 21.2 or 42.4
018 (C)
600 dpi mode: 1 dot = 42.4 µm
SP5-993-
1200 dpi mode: 1 dot = 21.2 µm
019 (Y)
If color (YMC) has shifted up in relation to black, add the
SP5-993-
above value to the current value.
020 (M)
If color (YMC) has shifted down in relation to black,
SP5-993-
subtract the above value from the current value.
021 (C)
Examples
• If the magenta line has shifted up in relation to black
by 40µm in 600dpi mode, add 1 to the current setting
of SP5-993-017.
Correction [dots] = +(40/42.4) = Approx. +1
• If the magenta line has shifted down in relation to
black by 70µm in 600dpi mode, subtract 2 from the
current setting of SP5-993-17.
Correction [dots] = -(70/42.4) = Approx. –2
TROUBLESHOOTING GUIDE
G060