Muratec MFX-2550 Field Engineering Manual page 47

Main control board
This board controls the MFP system. By inserting the USB memory stick, firmware can be updated.
The main devices mounted on the main control board and their functions are as follows:
This performs the firmware.
CPU
This controls the high voltage power board.
MD0021 This controls the memory.
This controls the scanner motor.
This edits the image such as rotation, mirroring, or n-in-1.
This transfers the serial image date to LPH board.
This performs the USB functions.
Modem This has G3 and Super G3 communication function.
Memory section FLASH memory
• The FLASH memory stores program data, background level data, and other
SRAM
• The SRAM stores user registered data. It is backed up by a lithium battery.
• The data will be cleared by removing the jumper pin JP2.
SDRAM
• The SDRAM is for following use. It is backed up by a Ni-MH battery on the
USB controller This controls the USB HOST function.
Scanner board
It detects the FBS sensor signal.
It controls the motor drivers.
It drives the FBS motor.
It controls the CCD.
It offsets the image signal (analogue signal) from the CCD, then adjusts gain, converts AD, and pro-
cesses the image data.
When MD 0022 has processed color or monochrome image, it codes the data and transmits to the
main control board.
RADF board
It detects the DADF sensor signals.
It controls the CCD.
When MD 0022 has processed color or monochrome image, it codes the data and transmits to the
main control board.
R-Scanner board
It offsets the image signal (analogue signal) from the CCD, then adjusts gain, converts AD, and pro-
cesses the image data.
CCD board
This board is mounted with color 600dpi CCD for letter-size.
The CCD device scans the document, and transmits the image data signal (analog signal) to scanner
board.
parameters.
main control board:
1) Stores program data; When the machine is turned on, CPU op-
eration data is copied from FLASH memory on SDRAM, and then
executed from the SDRAM.
2) Stores encoded image data.
3) Works as temporary communication memory.
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