Controller; Functions Of The Controller; Specification On The Controller - Epson EPL-N4000 Service Manual

EPSON EPL-N4000/EPL-N4000+

2.7.2 Controller

The video data from the host computer is input to the controller circuit
through either interface circuit or network board. C262 Main Board,
which is the control circuit of this printer, generates video signal by
converting the data based on the printing data from the host computer
into the laster data. Laster data is sent to Laser Diode PWB as video
signal. On the Laser Diode PWB, the emission light of Laser Diode is
turned on or off by the video signal.

2.7.2.1 Functions of the Controller

Communication between the host computer and network


Processing the Printing Data (Analyzing the command and
generating video signal)


Sending the video signal to ROS Assembly


Monitoring the control panel


Memory Management


Data Buffer
Rev.B

2.7.2.2 Specification on the Controller

The table below shows specifications on the controller.
Table 2-1. Specification on the Controller
Type Name (Location)
CPU R4700(IC1)
ASIC E05B51 (IC2)
E05B52 (IC23)
E05B40 (IC26)
E05B56 (IC32)
Memory Mask ROM(IC10,
11) / Flash ROM
(CN4,7)
ROM DIMM
DRAM
EEPROM(IC405)
EEPROM
Host I/F Parallel I/F
Network
Control Panel Control Panel Unit
Expansion ROM
DRAM
Type-B
Hard Disk
ROM Bus
Clock CPU
Video
Dot
DMA Video. Color
Video. Monochrome
I/O
Chapter 2 Operating Principles
Function
CPU controls the controller and is driven by
64 bit interior clock 133 MHz.
Memory control and DMA control.
Connecting E05B51 and E05B40
Control Panel, Host I/F control
PGI, RIT, Engine I/F, Toner Counter
IPL/Font
Code, Local language and Expansion ROM
SDRAM DIMM is used for both Standard and
Expansion.
128kbit Serial type, Storing the setting values
of the printer.
64Kbit, Parallel Type, (only pattern)
IEEE-1284, B-type connector
10/100 BaseT
LCD(20x1), 8 SWs, 6 LEDs
Expansion by ROM DIMM
Expansion by DIMM
2 slots, but only Ch1
P Bus (No DMA)
Expansion for ROM and I/F
66.66660 MHz
67.1749 MHz
33.58748 MHz
PCI (CPU Bus)
E05B56
E05B52 via E05B40 + Type-B
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