Ricoh A077-29 Bulletin technique - Page 33

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Ricoh A077-29 Bulletin technique
SUBJECT: Off-set Image Problem
PREPARED BY: S. Orita
CHECKED BY:
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
(Phenomenon)
Toner sticks to the hot roller and then is transferred to the copy paper from the hot roller
forming an off-set image.
(Cause)
This problem may or may not occur depending on the type of copy paper used. If the dust
from the copy paper contains a large amount of calcium carbonate, it tends to adhere to
the graphite in the teflon layer of the hot roller. If that happens toner sticks and gradually
accumulates at the same place on the hot roller. The greater the amount of the calcium
carbonate containing the copy paper, the more easily the toner sticks to the hot roller.
(Solution)
It is difficult to control the type of paper used and more kinds of paper including recycled
paper, which contains more additives, will be used in the future. Therefore, we have
decided to remove the graphite from the hot roller in order to expand the tolerance to
paper types and reduce the toner sticking problem.
The cut-in serial number of this change is as follows:
Machine Code
A076-10
A076-15
A076-16
A076-17
A076-19
A076-22
A076-25
A076-26
A076-27
A076-28
A076-29
Reissued on March 31 '94
Technical Bulletin
FROM: 2nd Technical Support Section
Revision of service manual
Information only
Other
Cut-in Serial
Number
2913110001
3030110001
2913100001
A2943100001
A2944010426
2903100001
2903100424
3B71030001
A2943100348
A2943121414
A2944010625
MODEL: E7 series
Machine Code
A077-10
A077-15
A077-16
A077-17
A077-19
A077-22
A077-25
A077-26
A077-27
A077-28
A077-29
No. RTB-012
DATE: Dec. 31, '93
PAGE: 1 of 2
(A076/A077)
Cut-in Serial
Number
2933100001
5131000001
2933100021
A2953100151
A295403XXXX
2923120001
2923100001
3B81030001
A2953110001
A295403XXXX
A2953100021