Service manual

TROUBLESHOOTING GUIDE 2
G130/G131 4-48 SM
Subject Symptom Cause Action
Toner blasting (2)-1 Black toner may blast on the
1st side of paper under the
low temperature at B&W print
mode.
Black toner moves on the paper during
transport to the fusing section, due to
discharge from the toner to the
surrounding guide plates.
Decrease the image density for Black with UP
mode.
Change the "0" to "–1" with UP mode
(Maintenance > Image > Black)
Toner blasting (2)-2 Black toner may blast on the
1st side of paper under the
low temperature at color print
mode.
Black toner moves on the paper during
transport to the fusing section, due to
discharge from the toner to the
surrounding guide plates.
Decrease the paper transfer current in SP data
from the default setting to a recommended value
depending on the mode selected as shown below.
SP2-301-013, -015, -017 ([FC Y/M/C] Low speed):
“10” to “8”
SP2-301-014, -016, -018 ([FC Y/M/C] Middle
speed): “16” to “13” (G130)
"21" to "17" (G131)
(If you want to improve this only at 600 dpi print
mode, change the values with only SP2-301-014,
-016 and -018.)
NOTE: If the toner limit is lowered too much, it
may cause the density of shadow areas to
be not smooth.
Toner blasting (2)-3 Black toner may blast on the
2nd side of paper under the
low temperature at B&W print
mode.
Black toner moves on the paper during
transport to the fusing section, due to
discharge from the toner to the
surrounding guide plates.
Increase the paper transfer current in SP data
from the default setting to a recommended value
depending on the mode selected as shown below.
SP2-301-004 ([K] Low speed): “10” to “14”
SP2-301-005 ([K] Middle speed):
“21” to “27” (G131)
SP2-301-006 ([K] High speed):
“21” to “27” (G130)
(If you want to improve this only at 600 dpi print
mode, change the only values with SP2-301-005
and -006.)
NOTE: If the toner limit is heightened too much, it
may cause image offset.