Main Board Circuit Configuration (Printer And Common Section) - Epson Stylus Photo RX700 Service Manual

EPSON Stylus Photo RX700
2.3.3.4 Main Board Circuit Configuration (Printer and Common
Section)
IC Location
SOC in CPU core IC12
Name: E01A56B*: by NEC (CPU: NA85E2S)
Built-in iLB RAM 32 Kbyte, Built-in dLB RAM 16 Kbyte
Built-in iCACHE 8 Kbyte, Built-in dCACHE 8 Kbyte
Operating frequency:
CPU core
NPB macro (UART, Timer C/D, prescaler)
User logic (Scanner / Printon)
User logic (Printer)
Local SDRAM
External bus clock
FLASH ROM IC2
Name: MBM29PL64LM (Fujitsu) or the equivalent
(64Mbit)
Application: Program
Type: Flash memory chip powered by +3.3 V only, the data on which
can be erased totally or partially in sectors
Capacity: 64 Mbit(R4CD120)
Package: 48 Pin TSOP
Bus width: 16 bits
FLASH ROM IC1
Name : MBM29PL32TM/BM (Fujitsu) or the equivalent
(32Mbit)
Application : Data / program
Type : Flash memory chip powered by +3.3 V only, the data on which
can be erased totally or partially in sectors
Capacity : 32Mbit
Package : 48 Pin TSOP
Bus width : 16 bits
SDRAM IC11
NameK4S561632*(SAMSUNG) or the equivalent
(CPU bus)
Application : System memory
Type : 4 M Words x16 bits x 4-bank SDRAM
Bus width : 16 bits
Power supply : 3.3 V single power supply
Capacity : 256 Mbit(4Mx16bitx4bank)
Package : 54 pin TSOP
Operating frequency : 133 MHz (CL =2) or higher
SDRAM for IC13
Name: K4S561632*(SAMSUNG) or the equivalent (256 Mbits)
image processing (256) K4S281632*(SAMSUNG) or the equivalent (128 Mbits)
(256-Mbit chip Application : Work memory for copy function
and 128-Mbit IC14 Bus width : 16 bits
chip) (128) Power supply : 3.3 V single power supply
Capacity: 256 Mbit (4 M x 16 bits x 4 banks) (256 Mbits)
Package : 54-pin TSOP
Operating frequency : 133 MHz (CL =2) or higher
Operating Principles
Functions
192 MHz (SSCG)
48 MHz
48 MHz (SSCG)
48 MHz
96 MHz (SSCG)
64 MHz (SSCG)
128 Mbit (2 M x 16 bits x 4 banks) (128 Mbits)
Operating Principles of Electric Circuitry
IC Location
RTC circuit IC3
RTC9824: by Seiko Epson
Composite IC for reset function, RTC and EEPROM
CR/PF/Pump IC7
Sleep mode is entered for power-saving.
motor drive
Drive voltage : 42 V
circuit
Drive IC: M63160J (RENESAS)
CR motor
Drive system : DC motor control
Control method: PID feedback method
Current detection resistance: 0.36Ω
PF Motor
Drive system : DC motor control
Control method: PID feedback method
Current detection resistance: 0.36Ω
Pump motor
Excitation method: 2-2 phase / 1-2 phase / 4W1-2 phase
Drive system : Bipolar driving
Current detection resistance: 0.36Ω
APG/Pressure/ IC8
Sleep mode is entered for power-saving.
ASF motor drive
Drive voltage : 42V
circuit
Drive IC: M63160J (RENESAS)
APG motor
Drive system : DC motor control
Control method: PID feedback method
Current detection resistance: 0.36Ω
Pressure motor
Drive system : DC motor control
Control method: PID feedback method
Current detection resistance: 0.36Ω
ASF Motor
Excitation method: 2-2 phase / 1-2 phase / W1-2 phase / 2W1-2 phase /
4W1-2 phase
Drive system : Bipolar driving
Current detection resistance: 0.36Ω
DAC circuit for IC6
Name : M62384FP (Mitsubishi)
motor driver Vref
Application : Vref generation for motor driver ICs
Head drive IC5
Drive voltage : 42 V
circuit circuit.
Head drive control through the control port of SOC.
Head drive control IC: E09A54RA (Sony)
Revision A
Functions
±
5%
1% 1 Ω
±
1% 1 Ω
±
±
1% 1Ω
±
5%
1% 1 Ω
±
± 1% 1 Ω
±
1% 1Ω
±
5%, VH is supplied to the head drive and control
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