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Scan direction

First pixel

Original's top left alignment position

Figure 1-4. Image Scanning Area

1.2.3 Standalone Copying Specifications

SUPPORTED PAPER TYPES AND SIZES

Table 1-11. Supported Paper Types and Sizes

Paper Type

Paper size

UI

Available Paper Type

Plain Paper

Plain Paper

A4, Letter*

Bright White Inkjet Paper (Euro/Asia) Premium Bright White Paper (EAI)

Premium Ink Jet Plain Paper (Euro/Asia)

Photo Paper

Glossy Photo Paper (Euro, Asia) Photo Paper Glossy (EAI)

4" x 6" (10 x 15 cm)

Premium Glossy Photo Paper (Euro/Asia) Premium Photo Paper Glossy (EAI)

Premium Semigloss Photo Paper (Euro/Asia) Premium Photo Paper Semi-Gloss (EAI)

Ultra Glossy Photo Paper (Euro/Asia) Ultra Premium Glossy Photo Paper (EAI)

Note* : EAI models: Letter size.

Euro/Asia models: A4 size.

Latin models: Selectable between Letter and A4.

(Turning On the printer while holding down B&W Copy Start button selects Letter size, and turning On the printer while holding down Color Copy Start button selects A4 size.)

COPY MODE_

Table 1-12. Print Mode for Copying

Copy Mode Print Mode

Table 1-12. Print Mode for Copying

Copy Mode Print Mode

Mode Name

Resolution

Color copy*

Plain Paper

Fast Economy

360 x 120 dpi

OFF

Eco

Normal

360 x 360 dpi

ON

VSD1

B&W copy*

Plain Paper

Fast Economy

360 x 120 dpi

OFF

Eco

Normal

360 x 360 dpi

ON

VSD1

Photo copy

Photo Paper

Best Photo

1440 x 720 dpi

ON

VSD3

Note* : Print mode for the Color copy and B&W copy is selectable as described below:

Fast Economy: Press Color Text (or B&W Text for B&W copy) button and Stop button simultaneously.

Normal: Press Color Text (or B&W Text for B&W copy) button.

Table 1-13. Copy Mode (Enlarging/Reducing)

Copy

Mode

Enlarge/ Reduce

Margins

Description

B&W Text

Standard

100%

3 mm

Copies A4/Letter original to the same size

Color Text

Standard

Fit to page

3 mm

Enlarges or reduces to A4/Letter

Color Photo

Borderless

Fit to page

0 mm

Enlarges or reduces to 4" x 6"/L size

Note* : "Fit to page" automatically sets the enlarge/reduce scale. When an original is smaller than general card size (approx. 54mm x 86mm), the margins will be different from those shown in the table.

COPY SPEED

Table 1-14. Copy Speed

UI Paper Type

Print Mode

Black

Color

Plain Paper (A4/Letter)

Fast Economy

5 sec.*1

14 sec.*1

Normal

20 sec.*1

72 sec.*1

Photo Paper (4" x 6")

Best Photo

-

380 sec.*2

Note *1: When printing "e-memo Pattern" on Plain Paper. *2 : Borderless printing

COPY AREA

BORDERLESS COPY

The following table shows the relative positioning of the original and copy.

The following table shows the relative positioning of the original and copy.

Table 1-15. Original (scanner)

Table 1-17. Original (scanner)

(readable width)

(out-of-range left margin)

(readable length)

(out-of-range top margin)

(readable width)

(out-of-range left margin)

(readable length)

(out-of-range top margin)

216 mm (8.5")

3 mm

297 mm (11.7")

3 mm 1

216 mm (8.5")

1.5 mm ± 1 mm

297 mm (11.7")

1.5 mm ± 1 mm

Table 1-16. Copy (printer)

Table 1-18. Copy (printer)

RM

LM

TM

BM

RO

LO

TO

BO

3 mm (0.12")

3 mm (0.12")

3 mm (0.12")

3 mm (0.12") |

2.5 mm

2.5 mm

2.8 mm

3.6 mm

Scan bed Scan area

Original (face down) "

Right side of original te

Print direction Scan direction

Start point

Copy paper -> Print area

Copy

Right side of copy

Top left corner of the original

Figure 1-5. Standard Copy

Right side of original te

Print direction Scan direction

Right side of copy

Scan bed Scan area

Original (face down)

Start point

Top left corner of the original

Print area Copy paper

Copy

Figure 1-6. Borderless Copy

1.2.4 Electrical Specifications

□ Primary power input

Table 1-19. Primary Power Input

Item

100-120 V model

220-240 V model

Rated power supply voltage

100 to 120 VAC

220 to 240 VAC

Input voltage range

90 to 132 VAC

198 to 264 VAC

Rated current

0.6A (max. 0.7)

0.3A (max. 0.4)

Rated frequency

50 to 60 Hz

Input frequency range

49.5 to 60.5 Hz

Dielectric strength

1500 ACVrms for one minute

Energy conservation

International Energy Star Program compliant

(black text on plain paper)

13.3 W

13.8 W

(color draft on plain paper)

17.9 W

17.7 W

Power consumption

Copying (normal BK mode)

15.3 W

15.6 W

Copying (draft BK mode)

21.6 W

22.0 W

Scanning

10.5 - 13.6 W

10.5 - 14.1 W

Sleep mode

3.8 W

3.8 W

Standby mode (power-off)

1 W

1 W

Note 1: If the printer is not operated for more than five minutes (T.B.D.), the standby function reduces the current to the motor to conserve power.

2: If the scanner is not operated for more than five minutes (T.B.D.), the standby function reduces the current to the motor to conserve power.

3: If the control panel is not operated for more than thirteen minutes (T.B.D.), the control panel turns to the power save mode within fifteen minutes (T.B.D.).

1.2.5 Environmental Conditions

Table 1-20. Environmental Performance

Condition

Temperature

Humidity*2

Shock

Vibration

Operating

10 to 350C (50 to 950F)

20 to 80%*3

(1 msec or less)

0.15G (X,Y,Z directions)

Transporting*1

-20 to 600C*3 (-40F to 1400F)

5 to 85%

(X,Y,Z directions)

Note *1: Packed in the original package *2: No condensation *3: 120 hours at 60°C, One month at 40°C

Note : The combined Temperature and Humidity conditions must be within the blue-shaded range shown below.

Figure 1-7. Temperature/Humidity Range

1.2.6 Durability

1.2.7 Acoustic Noise

10,000 pages (black only, A4), or three years (whichever comes first)

Seven billion shots (per nozzle) or five years (whichever comes first)

36,000 cycles (MCBF)

Maximum 47 dB

(printing ECMA pattern on Premium Glossy Photo Paper in Best Photo mode)

1.2.8 Safety approvals (Safety standards/EMI)

Canada

Mexico Taiwan

Germany Russia Singapore Korea

Hong Kong

Argentina

Australia

UL60950-1

FCC Part15 Subpart B Class B

CAN/CSA-C22.2 No.60950-1

CAN/CSA-CEI/IEC CISPR 22 Class B

N0M-019-SCFI-1998

CNS13438 Class B

CNS14336

EN60950-1

EN55022 Class B

EN61000-3-2, EN61000-3-3

EN55024

EN60950-1

GOST-R (IEC60950-1, CISPR 22)

IEC60950-1

K60950-1

KN22 Class B

IEC60950-1

IEC60950-1

AS/NZS CISPR22 Class B

1.2.9 Interface

The printer has a USB interface of the following specification. □ Standards

■ "Universal Serial Bus Specifications Revision 2.0"

■ "Universal Serial Bus Device Class Definition for Printing Devices Version

1.1" (printer unit) Transfer rate: Data format: Compatible connector: Recommended cable length: Device ID

12 Mbps (Full Speed Device) NRZI

Table 1-21. Device ID (T.B.D)

Product Name

Device ID

Product Name

Device ID

CMD:ESCPL2,BDC,D4,ESCPR1;

MDL:Stylus[SP]CX4300;

CLS:PRINTER;

DES:EPSON[SP]Stylus[SP]CX4300;

CMD:ESCPL2,BDC,D4,ESCPR1;

MDL:Stylus[SP]CX5600;

CLS:PRINTER;

DES:EPSON[SP]Stylus[SP]CX5600;

CMD:ESCPL2,BDC,D4,ESCPR1;

MDL:Stylus[SP]CX4400;

CLS:PRINTER;

DES:EPSON[SP]Stylus[SP]CX4400;

DX4400 DX4450

CMD:ESCPL2,BDC,D4,ESCPR1;

MDL:Stylus[SP]DX4400;

CLS:PRINTER;

DES:EPSON[SP]Stylus[SP]DX4400;

CMD:ESCPL2,BDC,D4,ESCPR1;

MDL:Stylus[SP]CX5500;

CLS:PRINTER;

DES:EPSON[SP]Stylus[SP]CX5 500;

BUTTONS

The five buttons on the control panel functions as shown below.

Table 1-22. Buttons

Button

Function

Power

Turns the power on or off.

• Head cleaning

• Ink Cartridge replacement

• Recovery from an error state

B&W Text

• B&W copy (100% scale with 3 mm margins, or Fit to page)

• Recovery from an error state

Color Text

• Color copy (100% scale with 3 mm margins, or Fit to page)

• Recovery from an error state

Note * : See "1.2.11 Button Functions in Stand-alone Copy" (p.21) for more details. INDICATORS (LED)

The three LEDs on the control panel indicates printer status as shown below.

Table 1-23. Indicators (LEDs)

LED

Function

Power LED [Green] *

Flashes during power-on and power-off sequence.

Flashes during some operation (printing, scanning, copying or cleaning)

is in process. Lights at stand-by.

Ink LED [Orange]

Flashes or lights to indicate an ink-related status or error.*2

Paper LED [Orange]

Flashes or lights to indicate a paper-related status or error.*2

Note *1: All LEDs except for Power LED will be turned off while printing or scanning by a computer.

*2: See " 1.2.12 Errors and Panel Status" (p.21) for more details.

Power Button

Ink LED Paper LED

Stop Button

Color Photo Button B&W Text Button Color Text Button

Power LED

Figure 1-8. Control Panel

Power LED

Figure 1-8. Control Panel

Note : Figure 1-8 is the control panel of the model for US/ESP/EAL. The button names or other indications printed on the panel differ depending on the destination.

1.2.11 Button Functions in Stand-alone Copy

The functions of the buttons in stand-alone copy mode are described in the table below.

Table 1-24. Buttons

Button

Function

Power

Turns the power on or off.

Cancels a print or copy job, and ejects paper if paper has been fed inside.

• Head cleaning

Runs a head cleaning cycle when pressed for three seconds or longer. If there is not enough ink for the cleaning, the cleaning is automatically cancelled and the printer indicates Ink out error.

• Ink Cartridge replacement

Moves the carriage to the position for replacing an ink cartridge(s) when pressed during Ink out error or No ink cartridge error.

Starts ink charging when pressed after replacing the ink cartridge(s).

Makes a color copy on 4x6 or L-sized Photo Paper.

• Recovery from an error state

Executes the remaining job when pressed after the error cause is removed.

B&W Text

• B&W copy (100% scale with 3 mm margins) Makes a B&W copy on A4 or Letter-sized Plain Paper.

When pressed for three seconds or longer, makes a B&W copy on A4 or Letter-sized Plain Paper enlarging or reducing the original image to fit it to the paper size.

• Recovery from an error state

Executes the remaining job when pressed after the error cause is removed.

Color Text

• Color copy (100% scale with 3 mm margins) Makes a color copy on A4 or Letter-sized Plain Paper.

When pressed for three seconds or longer, makes a color copy on A4 or Letter-sized Plain Paper enlarging or reducing the original image to fit it to the paper size.

• Recovery from an error state

Executes the remaining job when pressed after the error cause is removed.

B&W Text + Stop

Makes a B&W copy on A4 or Letter-sized Plain Paper in Fast Economy print mode. (100% scale with 3 mm margins)

Table 1-24. Buttons

Button

Function

Color Text + Stop

Makes a color copy on A4 or Letter-sized Plain Paper in Fast Economy print mode. (100% scale with 3 mm margins)

B&W Text + Power

(Only for Latin models)

Selects Letter size for B&W and Color copy.

Color Text + Power

(Only for Latin models)

Selects A4 size for B&W and Color copy.

1.2.12 Errors and Panel Status

Table 1-25. Errors and Panel Status

Error

LED status

Cause

Recovery

Priority

Fatal error

All LEDs flash

Mechanical trouble

Turn the power Off. Remove the cause and turn the power back on. If the error still occurs, call service.

1

Maintenance request

All LEDs lights

Some internal part needs to be replaced

Call service.

2

Paper jam

Paper LED flashes

A paper jam has occurred

Remove the paper and press B&W or Color Text button to continue, or press Stop button to cancel the job.

3

Paper out

Paper LED lights

Failed to load the paper.

Load paper on the ASF correctly, and press B&W or Color Text button to continue, or press Stop button to cancel the job.

3

Ink out

Ink LED lights

Some cartridge has run out of ink.

Replace the cartridge with EPSON genuine one.

4

No Ink Cartridge

Ink LED lights

Some cartridge was not detected.

Replace the cartridge with EPSON genuine one.

4

Incorrect Ink Cartridge

Ink LED lights

An incorrect cartridge was detected.

Replace the cartridge with EPSON genuine one.

4

Note * : When two or more errors occur at the same time, the one with higher priority will be indicated.

1.2.13 Power Save Mode

Without any panel operation for 15 minutes (T.B.D.) while the printer and scanner unit are in standby status, this unit moves into the low power panel mode in which power consumption for the panel decreases.

This unit recovers from that mode by pushing any button but Power Button or printing/ scanning by the computer.

This unit is turned off by pushing Power Button in that mode.

Table 1-26. Power Save Mode

Action

Function

Transition to power save mode

Turn off all the LEDs except for Power LED.

Recovery from power save mode

Recall the panel status as that before moving to low power panel mode.

1.2.14 Nozzle Check Pattern Print

Nozzle check pattern can be printed only with this unit. Left ink quantity of each color is also printed in 10% increments.

To activate this function, turn on this unit while depressing Ink Button. After printing the pattern, this unit moves to ordinary standby status. The example of nozzle check pattern is explained below.

<Yellow>

<Magenta>

360dpi VSD1 0.212mm (1/120inch)

360dpi VSD1 0.212mm (1/120inch)

Figure 1-9. Nozzle check pattern

1.2.15 Printer Initialization (T.B.D)

There are four kinds of initialization method, and the following explains each initialization.

1. Power-on initialization

This printer is initialized when turning the printer power on, or printer recognized the cold-reset command (remote RS command).

When printer is initialized, the following actions are performed.

(a) Initializes printer mechanism

(b) Clears input data buffer

(c) Clears print buffer

(d) Sets default values

2. Operator initialization

This printer is initialized when turning the printer power on again within 10 seconds from last power off, or printer recognized the -INIT signal (negative pulse) of parallel interface.

When printer is initialized, the following actions are performed.

(a) Cap the printer head

(b) Eject a paper

(c) Clears input data buffer

(d) Clears print buffer

(e) Sets default values

3. Software initialization

The [email protected] command also initialize the printer.

When printer is initialized, the following actions are performed.

(a) Clears print buffer

(b) Sets default values

4. Power-on initialization except I/F

The printer recognized the IEEE 1284.4 "rs" command. When printer is initialized, the following action is performed.

(a) Initializes printer mechanism

(b) Clears input data buffer

(c) Clears print buffer

(d) Sets default values except I/F

Figure 1-9. Nozzle check pattern

CHAPTER 2

OPERATING PRINCIPLES

2.1 Overview

This section describes the operating principles of the Printer Mechanism, Scanner Mechanism and Electrical Circuit Boards.

2.2 Printer Mechanism

Printer mechanism of Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 consists of printhead, carriage mechanism, paper loading/feeding mechanism, and ink system.

As in the case of conventional models, Stylus CX4300/CX4400/CX5500/CX5600/ DX4400/DX4450 has two motors; one is a stepping motor for paper loading/feeding mechanism, and the other is a DC motor for carriage mechanism. Papers are fed from the backside and ejected from the front side of the printer. Paper feeding mechanism feeds papers using the LD roller and the retard roller.

PF motor

Carriage unit

PF motor

Sensor Epson

PF roller

CR timing belt

CR encoder sensor

Retard roller

Compression spring

LD roller PE sensor

Cam, large Cam, small

Clutch Pump unit CR motor

Carriage unit

Paper eject roller

CR lock lever

Cap unit

Figure 2-1. Printer Mechanism Outline

PF roller

Paper eject roller

CR lock lever

Cap unit

CR timing belt

CR encoder sensor

Retard roller

Compression spring

LD roller PE sensor

Cam, large Cam, small

Clutch Pump unit CR motor

Figure 2-1. Printer Mechanism Outline

2.2.1 Printhead Specifications

The Printhead of this product is a D2-CHIPS type. □ Nozzle configuration

■ Monochrome 90 nozzles

The following shows the arrangement of the nozzles and the color arrangement of each nozzle line when viewed the printhead from behind.

Cyan: 29nozzles

Magenta: 29nozzles

Yellow: 29nozzles

C#29

Y#29

Paper Loading Direction

Carriage Moving Direction

Figure 2-2. Nozzle Rear View

2.2.2 Carriage Mechanism

Main components of the carriage mechanism are carriage unit (including printhead, CR encoder sensor), CR motor, timing belt, and CR scale.

2.2.2.1 CR Motor Specifications

Table 2-1. CR Motor Specifications

Item

Specification

Type

Motor with DC brush

Drive voltage

+42 V ± 5% (applied voltage to the driver)

Electric resistance

28.8 Q ± 10%

Inductance

20.1 mH ± 25%

Drive method

PWM, constant-current chopping

Drive IC

A6628

2.2.3 Paper Feeding Mechanism

Paper loading/feeding mechanism consist of CR lock lever inside the ink system, LD roller shaft (including clutch mechanism), and ASF unit.

CR lock lever and clutch mechanism play an important role in paper loading mechanism. Refer to 2.2.3.2 Drive Process (p26) for details.

2.2.3.1 PF Motor Specifications (For both ASF and Pump motor)

Table 2-2. PF Motor Specification

Item

Specification

Type

4-phase, 48-pole PM stepping motor

Drive voltage

+42 V ± 5% (applied voltage to the driver)

Wire wound resistance

4.3 Q +8 / -12% (per one phase at 20 °C)

Inductance

5.5 mH ± 20% (1KH, 1Vrms)

2-2 phase, 1-2 phase, W1-2phase, 2W1-2phase, 4W1-2 phase constant-current drive

Drive IC

A6628

2.2.3.2 Drive Process

1. Drive of the PF motor is always transmitted to the paper eject roller and the PF roller, however, it is not transmitted to the LD roller and the retard roller owing to the clutch of the LD roller shaft.

2. The carriage unit moves to the ASF trigger position once the paper loading command is received.

3. PF motor is rotated counter clockwise, and the clutch is released by the CR lock lever.

4. After the clutch is released, the PF motor rotates clockwise. Drive is transmitted to the LD roller and the paper loading operation begins.

5. During paper loading operation, papers are fed from the ASF unit to inside the printer by the rotating movement of the two cams of the LD roller.

■ Cam, large:releases hopper

■ Cam, small:releases paper back lever

6. Once a sheet of paper is fed, the hopper and the paper back lever bring back rest of the papers to the position in readiness by the rotating movement of the two cams mentioned above.

7. When the LD roller is turned a full circle, the CR lock lever release the clutch and the drive to the LD roller is interfered.

2.2.4 Ink System Mechanism

The Ink system mechanism consists of pump mechanism and capping mechanism that includes wiper mechanism.

2.2.4.1 Pump Unit Mechanism

When the PF motor turns, power is always transmitted to the ink system.

Table 2-3. PF Motor Rotational Direction & Ink System Mechanism

Direction*

Function

Counterclockwise

Absorbs the ink by the Pump Unit

Clockwise

Release pump.

Note * : The PF Motor rotational direction = seen from the left side of the printer.

2.2.4.2 Capping Mechanism

The Capping mechanism covers the printhead with the cap to prevent the nozzle from increasing viscosity when the printer is in stand-by state or when the printer is off.

2.3 Scanner Mechanism

The Scanner Mechanism of Stylus CX4300/CX4400/CX5500/CX5600/DX4400/

DX4450 are constructed of a Scanner Carriage Unit, Scanner Motor, etc., in the same way as previous A4 size scanners.

2.3.1 Scanner Carriage Mechanism 2.3.1.1 Scanner Carriage Unit Overview

The Scanner Carriage Unit consists of a CIS Board, Rod Lens Array, LEDs, etc.

CIS Board contains the sensing elements that are placed across the entire width of an original. The sensing elements, which does not install a color filter, read an original through the Rod Lens Array by turning on red, green, and blue light-emitting diodes (LEDs) alternately. It is not the CIS Board but the Main Board that converts the analog light signal read by the Rod Lens Array into digital signal.

A number of rod-shaped lenses, which are arranged on the sensing elements, are also placed across the entire width of an original. These lenses read the light reflected from the original that is produced by the light source (LEDs) and pass the information to the sensing elements. Compared to conventional CCD method, this optical system allows the focal length (distance between sensor and image scanned) to be shallow. Therefore, an original to be scanned should be brought close to the document glass. The optical system, in addition, is 1:1, (there is no optical reduction or enlargement) and this results in a scanner offering the solid performance in terms of accuracy.

Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 use three color LEDs (the three colors being red, green, and blue) to illuminate the line to be scanned in the document. Unlike cold cathode fluorescent lamp used in CCD method, usage of LEDs requires no warm-up time and allows the CIS to be highly power efficient.

Scanner Carriage Shaft Scanner Carriage Unit

Scanner Carriage Shaft Scanner Carriage Unit

Scanner Mechanism
Figure 2-3. Scanner Mechanism

Rod Lens Array LED

Rod Lens Array LED

Rod Lens Array
Figure 2-4. Scanning image

2.3.1.2 Scanner Carriage Unit Movement Overview

Image is scanned in the main scanning direction (=1 line) by the CIS board and in the sub-scanning direction (=several lines) combined with Scanner Carriage Unit movement. (See the figure below.)

The CIS board can scan 1 line in main scanning direction (parallel to the Scanner Carriage Unit) at one time. When scanning next lines after the second line in subscanning direction, CR driving moves the Scanner Carriage Unit, and scan the lines. The scanned data is sent to the control board. The scanned data for "n" lines and "n-1" line are processed consecutively.

Epson Printer Stylus 4450
Figure 2-5. Scanner Carriage Unit movement

The table below shows the specifications for the stepping motor that controls the Scanner Carriage Mechanism.

Table 2-4. Scanner Motor specifications

Item

Description

Motor type

PM type stepping motor

Drive voltage

42V (DC)

Coil resistance

37Q ±10% (per phase at 25 degrees)

Inductance

TBDmH ± TBD%

Driving method

PWM

Driver IC

L6219

Drive of the Scanner Motor is transferred to the Scanner Carriage Unit by the Scanner Timing Belt. The Scanner Carriage Unit slides in the secondary scanning direction. The Scanner Motor uses a stepping motor and drives using open loop control.

Printer Carriage Mechanism
Figure 2-6. Scanner Carriage Unit Mechanism

2.4 Electrical Circuit Operating Principles

The electric circuit of Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 consists of the following boards:

□ Power supply board: ASSY POWER 110V/220V

The figure below shows the block diagram of this printer.

Scan Photo With Dx4400
Figure 2-7. Electrical Circuit Block Diagram

2.4.1 Power Supply Board

In the Power Supply Board of Stylus CX4300/CX4400/CX5500/CX5600/DX4400/ DX4450, the simulated oscillating stimulation flyback converter circuit method is used, and it supplies +42 VDC to the drive line. The application of the output voltage is described below.

AC voltage input from AC inlet first goes through filter circuit that removes high frequency components and is then converted to DC voltage via the rectifier circuit and the smoothing circuit. DC voltage is then led to the switching circuit and FET QF1 preforms the switching operation. By the switching operation of the primary circuit, +42VDC is generated and stabilized at the secondary circuit.

2.4.2 Main Board

The logic circuit of the Main Board is composed of the following:

■ Logic line (CPU-ASIC 4 in 1, Flash-ROM and so on)

■ Motor control/drive circuit (CR Motor, PF Motor, Scanner Motor)

■ Head control/drive circuit

■ Sensor circuit

■ Reset circuit, EEPROM circuit

Table 2-5. Main Board Major Components and Primary Functions

IC

Location

Function

CPU-ASIC

U3

Drives CPU (H8S/2674 base), internal 8 K byte x 4 RAM, 24 Mhz, 3.3 V/1.8V

SDRAM

U4

3.3 V drive 4M x 16 bit DRAM

Serial Flash

U5

3.3 V drive 4 M bit Serial Flash that stores the program

Motor Driver

U6

Scanner motor drive; adjusts 5 V, drives 42 V

U7

CR/PF motor drive; adjusts 5 V, drives 42 V

RTC

Default settings, backup for all parameters

• Reset function

• Timer function

DAC

U10

Generates trapezoidal waveform, drives 3.3 V

Epson Stylus Cx5500 Scanner
Figure 2-8. Main Board Block Diagram

TROUBLESHOOTING

CHAPTER

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