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e-STUDIO281c/351c/451c PREVENTIVE MAINTENANCE (PM) June 2005 © TOSHIBA TEC
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4.1.3 Work flow of parts replacement
The timing for the parts replacement usually depends on the number of output pages / develop counts
after they were replaced before. However, its drive counts is also to be considered when replacing the
parts. Even if the number of output pages has reached the level of replacement, for instance, the part
may still be usable with its drive counts not reaching the specified drive counts. On the other hand, the
part may need replacement even if the number of output pages has not reached the level of replace-
ment with its driving time exceeding the specified drive counts. The life span of some parts such as feed
roller is heavily dependent on the number of output pages rather than the drive counts.
The following work flow diagram shows how to judge the timing of replacement with the number of out-
put pages and the drive counts.
The number of output pages is counted as “4” for 1 page for printing at color modes. This “4” is “develop
counts”.
Example 1:
When the number of output pages has reached the specified level
Fig.4-5
Example 2:
When the image failure occurred before the number of output pages has reached the specified
level
Fig.4-6
• The parts in RADF
• The parts in feeding system
• The parts in the drum/cleaner unit
• The parts in the transfer belt unit
• The parts in the 2nd transfer unit
• Developer material
• The parts in the fuser unit
Replace the part.
Replace the part.
Check the drive counts at PM
support mode.
Does it exceed the specified
drive counts?
Replace the part after the drive
counts has reached the specified
count.
Yes
No
The part is still usable.
Replace the part.
Yes
No
Check the drive counts of all parts at PM support mode.
Does it exceed the specified drive count?
Check the part and equipment according to the “TROUBLESHOOTING”.