Operating Principles Of Electric Circuitry; Overview; Features; Circuit Board Constitution - Epson Stylus Photo RX 560 Service Manual

EPSON Stylus PHOTO RX560/580/590

2.2 Operating Principles of Electric Circuitry

2.2.1 Overview

The major circuit boards of Stylus PHOTO RX560/580/590 are as follows:
Main Board: C663MAIN
Power Supply Board: C653PSB
Panel Board: C663PNL + C663PNL-B

2.2.2 Features

Control by one V850E2 core CPU.
Throughput improved by newly employed SOC, E01A73B*
Reduced cost of power supply for the core of SOC and of motor drive by a newly
employed motor driver with a built-in power supply
Realized circuit compatible with multi-common system
Reduced cost by employment of newly developed E09A7218A as the HEAD
DAC IC
Improved processing speed of memory card interface by newly developed
memory card control ASIC (USX2007-NW-**)
Equipped with a color LCD (2.5-inch alpha TFT LCD) as a standard feature
Power consumption reduced by executing the following actions at transition to the
power save mode
System control: Stopping part of clock inside the ASIC
Motor drivers entering sleep mode
Head DAC IC entering standby mode
Turning off power to the LCD
Printer control: Releasing the printer motor short brake
Cutting off the photo-electric current of the photo sensor
Scanner control: Stopping scanner motor chopping
Cutting off CIS & CIS LED current
Others: SDRAM entering self-refresh mode (automatic entering by ASIC
setting)
Operating Principles

2.2.3 Circuit Board Constitution

Circuit Board
System
section
Main
Board
Power Supply
section
Printer
section
Card I/F
section
Scanner
section
Panel Board
Power Supply section
LCD Board
Operating Principles of Electric Circuitry
Table 2-5. Circuit Board Constitution
Description
Oscillation circuit (48MHz ± 100 ppm)
SSCG setting circuit
ASIC incorporating CPU core (E01A73B*)
• Package: 352-pin PBGA
• Power voltage: Internal 1.0 V ± 0.1V
• CPU core: V850E2
• Operation frequency: Inside of CPU core: F288MHz (SSCG)
SD-RAM controller: F96MHz (SSCG)
PT/ scanner section: F48MHz (SSCG)
Hardware JPEG decompression, AFP: F96MHz (SSCG)
Printer section: F48MHz (No SSCG)
Printer drive timer base clock: F48MHz (No SSCG)
• Built-in command RAM: 40 kByte (iLB-RAM)
• Built-in data RAM: 16 kByte (dLB-RAM)
Memory (FLASH ROM (64 Mbits), local SDRAM (256 Mbits), CPU
SDRAM (128 Mbits)
RTC (RTC/ power supply monitoring / FLASH ROM) circuit
USB interface (HOST = High-Speed, DEVICE = High-Speed)
Panel interface
Color LCD interface
SERIAL FLASH ROM for banding reduction system
IrDA circuit
Power supply control circuit (PSC/ESAVE)
DC-DC converter circuit
Overvoltage protection circuit
Power-saving controller
Head drive circuit
CSIC interface
CR Motor control/driving circuit
PF Motor control/driving circuit
Sensor circuit
Memory card control ASIC (USX2007-NW-**)
Memory card connector (CF connector, 4 in 1 connector)
Power supply control circuit for CF
Scanner motor control/driving circuit
Scanner interface circuit
Sensor circuits
LED lighting circuit
Switch reading circuit
42 V generation circuit (flyback converter)
Module made by SEID (2.5-inch alpha TFT)
Revision A
External 3.3V ± 0.3V
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