Oki C9600 Service Manual page 23

The main control PCB of the 1200dpi-Printer consists of a CPU, RAM, HDD, CompactFlash, SouthBridge
LSI, EEPROM, KeyChip, PCI Bus Option and Advanced Interface.
(1) CPU
1GHz Transmeta TM5800 CPU.
(2) RAM
There are 3 types of RAMs. SDRAM DIMM is the only user option RAM. The DDR and
video RAM configuration is fixed and cannot be modified. Only the total memory of the
DDR and SDRAM DIMM is recognized as a usable RAM within the system configuration.
DDR
SDRAM DIMM : 128, 256, and 512MB; 133MHz speed, 144p DIMM mounted in DIMM slot.
Video RAM
(3) HDD/CompactFlash
The 1200-dpi program is stored in a storage medium. Depending on the model, the system
is equipped with HDD or CompactFlash. However, HDD may be added as an option to
a model with CompactFlash. HDD is a mold assembly similar to the one for the 600-dpi
system.
(4) SouthBridge LSI
This is a ALI-make BGA package LSI. It mainly controls the USB I/F, Centro I/F, image
processing LSI, Ethernet board, and MFP extension board via the PCI bus.
(5) Image Processing LSI
This is an EFI-make BGA package LSI. It is mainly for image processing.
(6) EEPROM
This is a 3.3V/256kbit EEPROM with an 8-pin DIP package mounted on the IC socket.
It stores various settings that the control unit manages.
(7) KeyChip
The KeyChip is an 8-pin DIP package mounted on the IC socket. It is purchased from
EFI and stores EFI management information.
(8) PCI Bus
100-pin: An MFP extension board is available as optional equipment.
68-pin: A LAN card is provided as standard equipment.
(9) Advanced Interface
Standard
Additional PCB : MFP Extension Board (PCI BUS Connection)
42930511TH Rev. 2
: This is 256MB and 266MHz in speed, and directly soldered on the ASP PCB.
: RAM that is directly soldered on ASP PCB for the video LSI.
: Centronic Parallel I/F (IEEE-1284)
USB (USB2.0) I/F
Ethernet Board
Oki Data CONFIDENTIAL
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