Work Flow Of Parts Replacement - Toshiba e-STUDIO520 Service Handbook

4.1.3

Work flow of parts replacement

The timing for the parts replacement usually depends on the number of output pages ever made after
they were replaced before. However, its drive counts time 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.
Example 1:
When the number of output pages has reached the specified level
• The parts in RADF
• The parts in feeding system
• The parts in the fuser unit
Replace the part.
Example 2:
When the image failure occurred before the number of output pages has reached the specified
level
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".
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• The parts in the drum/cleaner unit
• The parts in the developer unit
• The parts in the transfer/separation charger unit
• Filter
Check the drive counts at PM
support mode.
Does it exceed the specified
drive counts?
No
The part is still usable.
Replace the part after the
drive counts has reached the
specified count.
4 - 7
Yes
Replace the part.
Replace the part.
e-STUDIO520/523/600/603/720/723/850/853
PREVENTIVE MAINTENANCE (PM)
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