Lexmark C925 - Toner Sensors; Paper Feed Unit; Duplex Unit; Sub-Drive Assembly

Lexmark C925/X925 Color Product Study Guide Rev 2.3
For Training Purposes Only 6/21/2011
53
Toner Sensors
These sensors are buried in the machine and a number of other parts (including some frame pieces)
must be removed in order to access the sensors. This removal is tedious and has an increased chance
to result in a malfunction or print quality problem after repair.
Paper Feed Unit
To remove the paper feed unit, a number of other parts must be removed first which increases the
likelihood of additional failures when the machine is reassembled. The actual replacement of the unit
itself is not complex.
The Paper Feed Unit must be removed to replace the pick rollers when a maintenance kit is installed.
Duplex Unit
To remove the duplex unit, a number of other parts must be removed first which increases the likelihood
of additional failures when the machine is reassembled. The actual replacement of the unit itself is not
complex.
Sub-Drive Assembly
To remove the Sub-Drive Assembly, a number of other parts must be removed first which increases the
likelihood of additional failures when the machine is reassembled. The removal on the X925 is more
complex than the C925 due to interference by the Scanner Unit.
RIP Board
This part contains Mirrored NVRAM, so it should never be replaced at the same time as other Mirrored
NVRAM components. See the Mirrored NVRAM Components section in this guide for complete details
and exceptions.
In addition, the Rip Board contains the default and custom eSF applications and settings. These are NOT
contained in the NVRAM or hard drive, therefore, a RIP Board failure could result in loss of these
applications and their settings if they are not backed up. When a new RIP Board is installed, the Lexmark
default eSF applications and settings are loaded.
The best practice is for an administrator to have their eSF applications and settings backed up prior to
encountering a problem. In case this hasn’t been done, however, an attempt to back up the data should
be performed before replacing the RIP Board.
See the following page for instructions on how to back up the eSF applications and settings.