Black Line Or Band - Ricoh FW870 User Manual

COPY QUALITY TROUBLESHOOTING

1.4 BLACK LINE OR BAND

Vertical line or band?
Yes No
Does the black line appear at 251 mm intervals?
No
Clean or replace the drum.
If a black band appears 250 mm from the leading edge, turn the main switch off and on . If
the problem is not fixed, check the T& S corona leakage. *NOTE
Check the part of the following items that corresponds to the position of the vertical line or
band.
• Charge corona wire
• Grid wires
• Light path (Exposure lamp, fiber optics array, exposure glass)
• Cleaning blade
• Development unit
• Drum
NOTE: If the separation corona leakage is detected, the separation corona
will be turned off. This condition will not be reset until the main
switch is turned off and on. If the separation corona does not turn
on, a black band appears 250 mm from the paper leading edge.
Yes
6-4
25 July 1994