Ricoh A077-29 Bollettino tecnico - Pagina 37
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SUBJECT: Off-set Image Problem (a final countermeasure)
PREPARED BY: S. Orita
CHECKED BY: S. Hamano
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
As mentioned in the RTB No.12, the greater amount of Calcium Carbonate the copy paper
contains, the more easily the toner sticks to the hot roller.
It is difficult to control the type of paper which is used in the field. Besides, paper
containing more additives seems to be more popular in the future.
Therefore, we decided to remove the graphite from the hot roller last year to reduce the
toner sticking problem. (P/N AE011009B → C)
To further increase the tolerance to the problem, this time, we have changed the kind of
Teflon coating of the hot roller. With this change, pin holes on the hot roller surface which
hook the mixture of toner particles and paper additives, have been reduced and the roller
surface has become more smooth.
On the other hand, the material change lowers the hardness of the new hot roller, which
forces to shorten the present 160,000-copy PM cycle to the new 80,000-copy PM cycle.
Hot Roller
The new hot roller has been installed in the Robin copier since the first production.
The E7 Copier is no longer produced. The new hot roller is available for the E7 as a
spare part.
Technical Bulletin
Revision of service manual
Information only
Other
Old P/N
AE011009
Item
EM
I
FROM: 2nd Technical Support Section
New P/N
Description
AE011033
80K
I or R
I: Inspection
R: Replace
No. RTB-014
DATE: Nov. 15, '94
PAGE: 1 of 1
MODEL:
E7 series
(A076 / A077)
Hot Roller
160K
I or R