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© 2012 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO556/656/756/856(Ver03)
PREVENTIVE MAINTENANCE (PM)
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7.4.3 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
replacement 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
output pages and the drive counts.
Example 1:
When the number of output pages has reached the specified level
Example 2:
When the image failure occurred before 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
• The parts in the drum/cleaner unit
• The parts in the developer unit
• The parts in the transfer/separation charger unit
• Filter
Replace the part.
Yes
No
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.
The part is still usable.
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”.
Replace the part.
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