Epson EPL-N1600 Option, Service Manual

Page: 54 / 210

EPSON EPL-N1600 Chapter 2 Operating Principles
Rev. A 55
2.1.4 Main Control Circuit
The main control circuit of the EPL-N1600 is the C258MAIN Board and
it consists of two sections: the main control circuitry and the engine
control circuitry (MCU). The following tables describe the main
components of each section.
Figure 2-3. CIRCUIT BLOCK DIAGRAM - C258MAIN BOARD
Table 2-2. C258MAIN BOARD - Main Control Circuit
Table 2-3. C258MAIN BOARD - Engine Control Circuit (MCU)
Component Location Operation
CPU (VR4310)
µPD30200GD
IC1 A RISC CPU running at 150MHz. Controls
the board’s main control section.
ASIC E05B41BA IC10 Controls the following:
• Memory access (RAM/ROM)
• DMA (I/O, Video)
ASIC E05B40BA IC15 Controls the following:
• External interfaces
• Communication with the operation panel
• Interrupts
ASIC E05B28KA IC16 Controls the following:
• Video data generation
• RIT/PGI operation
• Video interface (communication with the
engine control section)
DRAM IC19-22 Two 16Mbit ((16) modules. Serve as the
system’s standard memory.
Mask ROM IC17/18 8Mbit mask ROM. Stores font dataand IPL.
Program ROM CN5 Either C215PROG (Flash ROM version) or
C215PROG-B (Mask-ROM version) ROM-
DIMM module is installed in ROM-DIMM
socket CN5.
EEPROM (NM93C86A) IC13 16Kbit EEPROM which saves printer
configurations and status.
Component Location Operation
CPU (PD78054) IC201 Engine control CPU. Controls engine
components (implements printing) in
accordance with video data from the main
control section.
ASIC (PD65622GF) IC202 Controls the video interface with the main
control section. Also controls EEPROM.
EEPROM
(AT93C45)
IC203 Capacity is 16Kbit. Stores setup parameters
related to engine control.