Mirrored Printhead Settings Components; Engine Board; Printhead Controller Board; Mirrored Nvram Components - Lexmark C925 Product Study Manual

Lexmark C925/X925 Color Product Study Guide

Mirrored Printhead Settings Components

Engine Board

Printhead Controller Board

The C925 and X925 printers have a unique mirror between the Printhead Controller Board and Engine
Board for the four LED Printhead settings. Unlike previous printers such as the C920, you do not need to
manually adjust the Light Values for an LED if it is replaced nor do you swap EEPROMs between the
boards. This mirror is similar to the printer's System and Secure NVRAM Mirror, however, these settings
are strictly printhead related.
If the Printhead Controller Board is replaced with a new board, the mirrored settings in the Engine Board
are loaded on the new Printhead Controller Board. Conversely, if the Engine Board is replaced, the
mirrored settings in the Printhead Controller Board are loaded on the new Engine Board.
Warning! To avoid losing all settings, NEVER replace both the Printhead Controller Board and
Engine Board at the same time. If both need to be replaced, install one, power on the printer then replace
the other board after the settings are allowed to load.

Mirrored NVRAM Components

Operator panel UICC Card

ICC Board (Scanner ICC Board)

RIP Board

Warning! Observe all ESD precautions while handling electronic parts.
Warning! When replacing any one of the NVRAM components:
•
Only replace ONE component at a time – NEVER replace both at once.
•
Perform a POR before replacing the second component. If this procedure is not followed,
the printer will be rendered inoperable.
•
These components mirror the critical NVRAM settings for the printer. If you have not already
done so, complete the online course Mirrored NVRAM from Lexmark's online learning site.
Warning! If you must use one of the components listed above as a method of troubleshooting, boot
the printer into Diagnostic mode only. This will prevent the NVRAM from copying to the new
component. If the printer is allowed to boot normally, however, the NVRAM will copy to the new
component and it cannot be used in another printer. It must be returned to the manufacturer.
For Training Purposes Only
- X925 Only
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Rev 2.3
6/21/2011