T
echnical
B
ulletin
PAGE: 10/25
Model:
Taurus-C1a/C1b (D074/D075)
Date:
20-Mar-14
No.:
RD074118
3. 50mm interval Banding
Excerpt from RTB #RD074019a
Cause
Cause
Solution
Gap between the drum and
development roller fluctuates.
Drive gear and coupling gear
of the development roller are
misaligned.
Align the drive gear and
coupling gear. (Step1)
Development unit is of the old
type (D0742301-03).
Replace with the latest
development unit. (Step4)
Development unit was
damaged during transport.
Machine usage conditions
Toner/developer degradation
Refresh toner. (Steps 2&3)
Replace developer. (Step4)
Action
Step1:
Are the markings on the drive gear and coupling gear of the development roller aligned?
Yes : Go to step2.
No : Do the “Development roller Drive gear – Coupling gear alignment procedure”
described in the last part of this bulletin.
Print the image showing the problem. Has the problem resolved?
Yes : Finish.
No : Go to step2.
Step2:
Print out 40 sheets of full page solid fills on A3/DLT in duplex in the affected color to
refresh toner in the development unit. Then, do SP3-011-002 or [0201: Adjust Image
Density] in the [Adjustment Settings for Skilled Operators].
Print the image showing the problem. Has the problem resolved?
Yes : Go to step3.
No : Go to step4.
Step3:
Use the SMC tool (p/n: M0779509) and SP Check Sheet to verify the “average image
coverage ratio” of the jobs run on your customer’s m
achine. If the average is lower than
5%, change the value applied in SP3-820-022 from 0 (default) to 100. This SP setting
enables the system to refresh toner at job end.