2-22 WorkCentre 3210/3220 Multifunction Printer Service Manual
Theory of Operation
Memory
The Main Controller Board has Flash ROM and DRAM memory units.
■ Program Memory: Stores System Program and can be updated via USB
interface.
■ Capacity: 16 MB (NOR Flash)
■ Maximum Access Time: 90 ns
■ Working Memory: It is used as Swath Buffer in printing, Scan Buffer in
scanning, ECM Buffer in FAX receiving, and System Working Memory
Area.
■ Capacity: 128 MB (standard), up to 384 MB
■ Type: DDR2 SDRAM 667 MHz, 16 Bit
High-Voltage Power Supply
The High-Voltage Power Supply (HVPS) takes 110/ 220 V and outputs +5 V,
+24 V to supply power to the Main Controller Board and other boards.
The HVPS generates high voltage for the THV/MHV/BIAS and the outputted
high voltage is supplied to the toner, Print Cartridge, and Transfer Roller.
RAM DIMM
CN1 Main Controller Board
Front Cover Open Switch (SW1)
Rear Cover
Open Switch
(SW2)
THV
Varistor
Supply
Developer
OPC
MHV
s3210mfp-141
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