Xerox C2424 Service Manual - Page 56

Image Processor Controller Board: The image processor board provides the interface between the main board and the scanner. The image processor board includes a complete color image path, taking raw 24-bit RGB scanner data and creating print ready CMYK or B&W binary data, 8-bit RGB data, or 8-bit grayscale data. NVRAM: The NVRAM memory device, located on the main board, stores control panel defaults, network settings, IOT calibration data, copy counts, 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 board in the replacement electronics module. Memory: The main board supports two PC133 compatible SO-DIMM SDRAM memory modules (64 to 512 MB). While the main board will support memory configurations as low as 64 MB, the WorkCentre C2424 requires a minimum of 256 MB of system memory to operate. The system has been tested with up to 1 GB of memory installed. This memory configuration can be ordered as an option. Hard Drive Support: A hard drive IDE cable is plugged into the main board from the hard drive board. A separate power cable must be plugged into the power control board from the hard drive board to make the hard drive functional. The WorkCentre C2424 requires that a hard drive be installed for proper operation. 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 the printer's NVRAM chip. The configuration card supports the transfer of network configuration information from a failed printer to a replacement printer. When the electronics module is replaced, the configuration card must be transferred to the replacement electronics module. For more information on the configuration card, see "Configuration Card Personality Parameters" on page 2-45. Power Control Board: The power control board distributes drive voltages to operate the printer's various motors, solenoids and clutches. The power control board also provides the interface that returns information from the printer's sensors to the main board. The sensors are used to track mechanical and thermal functions, such as the position and temperature of the printhead. The power control board also generates regulated +/- 12 V and 5 V from unregulated +/-15 V power. Power Supply (Electronics Module): There are no field adjustments necessary on the power supply. In general, the power supply has two main, yet interrelated sections: the AC section and the DC section. In the AC section, power is routed to 10 triacs. Under the main board logic control, the triacs supply AC power to the 10 heaters in the printer. Two fuses provide current protection to the triacs. Fuse F2 and F3 protect the power supply from, most often, a shorted triac caused by a defective heater. If the F2 or F3 fuses blow, it is best to replace the electronics module (and, of course, the defective heater), rather than the fuse. Otherwise uncontrolled, with the fuse replaced but the triac shorted, AC power may be applied to the heater. Each time the main board turns 2-12 WorkCentre C2424 Service Manual