Service manual

TROUBLESHOOTING GUIDE 30 July, 2001
4-40
Action Required
Direction Area Symptom Possible Cause
Output Mode SP Mode
Procedure / Remarks
Normal Paper
1200 dpi
SP1-004-
004
Normal Paper
600 dpi
SP1-004-
005
Leading
edge
Color shift,
especially 100 mm
from the leading
edge.
(Refer to pattern 1
on page 4-44 for the
symptom.)
Registration roller
speed is not
suitable for the
paper used.
Thick Paper
1200 dpi
(by-pass feed)
SP1-005-
003
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.
Above: Speed is too fast: Decrease speed
Below: Speed is too slow: Increase Speed
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.
Normal Paper
1200 dpi
SP1-004-
001
Normal Paper
600 dpi
SP1-004-
002
Sub-scan
Trailing
edge
Color shift,
especially 100 mm
from the trailing
edge.
(Refer to pattern 2
on page 4-44 for the
symptom.)
Fusing roller
speed is not
suitable for the
paper used.
Thick Paper
1200 dpi
(by-pass feed)
SP1-004-
007
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.
Above: Speed is too fast: Decrease speed
Below: Speed is too slow: Increase Speed
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.