October 2012
8-10
ColorQube 8570/8870 Service Manual
Printer Electronics
Revised, 3rd Revision - Xerox Internal Use Only
Theory of Operation
Imaging data is received from the print function and is processed through the imaging path por-
tion of the Main Controller Board. This data then is split into two paths. One of these paths is
through the Power Control Board to the Wave Amplifier. This data controls the operation of the
Wave Amplifier with regard to the drive algorithm to use for driving the jet stacks (discussed
later in the Printhead section). The second path is through a ribbon cable from the Main Con
-
troller Board to the Printhead Control Board (located on the underside of the Printhead). These
two signals are interpreted by the Printhead to produce the image on the Drum.
Electronics Module Components
NVRAM
The NVRAM memory device, located on the Main Controller Board, stores Control Panel
defaults, network settings, usage profile data, and the printer serial number, which is also
referred to as the Engine Tracking Number (ETN). When the Electronics Module is replaced,
the NVRAM must be transferred to the Main Controller Board in the replacement Electronics
Module.
Memory
The ColorQube 8570/8870 supports up to two 512 MB of DDR2 DIMMs for a maximum of 1 GB
total.
NOTE: Memory should be installed in the primary socket before installing in the secondary
socket. The primary memory socket resides on the left side (away from the processor).
Upgrade memory should be added to the secondary memory slot residing on the right side
(close to the processor).
Figure 3 Memory and NVRAM Chip
Configuration Card
The Configuration Card is a thumbnail-sized device that plugs into the side of the Electronics
Module. This device stores printer information and interacts with NVRAM. When replacing the
Electronics Module, the Configuration Card must be transferred to the replacement Electronics
Module.
Figure 4 Configuration Card
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