Gestetner G060 Service Manual page 535

Rev. 09/2003
Direction Area Symptom
Sub-scan Leading Color shift,
edge especially 100 mm
from the leading
edge.
( pattern 1 on
page 4-44 for the
symptom)
Trailing Color shift,
edge especially 100 mm
from the trailing
edge.
( pattern 2 on
page 4-44 for the
symptom)
SM
Action Required
Possible Cause
Output Mode
Registration roller Normal Paper
speed is not 1200 dpi
suitable for the
Normal Paper
paper used.
600 dpi
Thick Paper
1200 dpi
(by-pass feed)
Fusing roller Normal Paper
speed is not 1200 dpi
suitable for the
Normal Paper
paper used.
600 dpi
Thick Paper
1200 dpi
(by-pass feed)
4-53
Procedure / Remarks
SP Mode
SP1-004-4 Check the magenta line position against the black line.
If the registration roller is too fast or slow, the magenta
line appears above or below the black line.
SP1-004-5
Above: Speed is too fast: Decrease speed
Below: Speed is too slow: Increase Speed
SP1-005-3
When adjusting the speed, change the setting in 0.1
steps, and check the result by printing the grid pattern.
Then, repeat this until the shift between magenta and
black is minimized.
NOTE: If the registration roller is too fast, magenta jitter
may appear at 67 mm and/or cyan jitter at 165
mm from the trailing edge. This is caused by the
mechanical shock when the trailing edge of the
paper passes the registration rollers.
SP1-004-1 Check the magenta line position against the black line.
If the fusing roller is too fast or slow, the magenta line
appears above or below the black line.
SP1-004-2
Above: Speed is too fast: Decrease speed
Below: Speed is too slow: Increase Speed
SP1-004-7
When adjusting the speed, change the setting in 0.1
steps, and check the result by printing the grid pattern.
Then, repeat this step until the shift between magenta
and black is minimized.
NOTE: Fusing roller speed can be adjusted with
''Custom Adjust' in Fuser Adjust in the User
Program Mode, instead of with SP mode.
TROUBLESHOOTING GUIDE
G570