Toshiba 4511, 3511

e-STUDIO3511/4511 PREVENTIVE MAINTENANCE 4 - 6 November 2003 © TOSHIBA TEC

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 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.

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. 4-105

Example 2:

When the image failure occurred before the number of output pages has reached the specified level

Yes

• The parts in RADF

• The parts in feeding system

Replace the part.

•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

Check the drive counts at PM

support mode.

Does it exceed the specified

drive counts?

Replace the part.

The part is still usable.

Replace the part after the drive counts

has reached the specified count.

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.

Yes

Fig. 4-106