System Description - Lexmark 3200 Service Manual

System Description

The 3200MFP is a duplex scanner which can scan synchronously both top and bottom size in a
document. It includes one main control board, two optical modules, one ADF module and one
LCD panel.
System Diagram
Figure 1.4 shows the system block diagram.
The main control board controls all the modules built up the 3200MFP. It includes a RISC.
ARM9(internal) as the main controller, one Flash Memory as program area , two ASIC for
flatbed and ADF image processing and each have external 64MB SRDRAM for data processing ,
two A/D converter for processing flatbed and ADF CCD signals input, two sets of motor
drivers for driving flatbed and ADF motors, one 1394 controller for data interfacing with
printer.
The power is an external 24V/2500mA power adapter for the whole system.
There are some different values inside the 3200MFP.
+24V Power directly comes from the power adapter and used for flatbed and ADF motor.
+12V Power converted from 7812 to supply flatbed and ADF CCD
+5V Power converter from 34063 to supply flatbed and ADF A/D converters and all 5V
logic.
+3.3V Power converted from LM 2576/3.3V to supply RTL8811, 1394 controller, two image
processing ASICs and some 3.3V logics.
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