Ricoh TCRU/ORU, Troubleshooting Manual

Page: 57 / 184

(b) Colored spots appear at 40 mm (1.6 inches) intervals
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
DFP550
Yes
No
Does it occur at low temperature?
Turn on the paper tray heater and ITB heater.
Perform a test print.
*1
Has the problem been resolved?
Finished!
Detach the charge roller
unit of the affected color
and check the roller surface.
Is the surface stained?
Wipe the charge roller surface
with a damp cloth, and then
with a dry cloth to remove the moisture.
Perform a test print.
*1
Has the problem been resolved?
Is the surface scratched?
Replace the charge roller unit.
Perform a test print.
*1
Has the problem been resolved?
Contact your service representative.
*1: Print a full-page, half-tone sheet of A3, DLT or longer paper for each of cyan, magenta, and yellow, and
black.
• Do not use ethanol or any other organic solvent to clean the photoconductor unit. Otherwise it may
cause damage to the photoconductor unit.
• For details about replacing the photoconductor unit, see Replacement Guide.
Spots
55