Epson stylus 777 schematic

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SERVICE MANUAL

Color Inkjet Printer

EPSON STYLUSCOLOR680/777/777i

SEIJ00010

Notice

All rights reserved. No part of this manual may be reproduced, stored in a retrieval system, or transmitted in any form or by any means electronic, mechanical, photocopying, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION.

All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.

The contentsof this manual are subject to change without notice.

All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.

The above not withstanding SEIKO EPSON CORPORATION can assume no responsibility for any errors in this manual or the consequences thereof.

EPSON is a registered trademark of SEIKO EPSON CORPORATION.

General Notice: Other product names used herein are for identification purpose only and may be trademarks or registered trademarks of their

respective owners. EPSON disclaims any and all rights in those marks.

PRECAUTIONS

Precautionary notations throughout the text are categorized relative to 1)Personal injury and 2) damage to equipment. DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing

procedures preceded by DANGER Headings.

WARNING Signals a precaution which, if ignored, could result in damage to equipment.

The precautionary measures itemized below should always be observed when performing repair/maintenance procedures.

DANGER

1. ALWAYS DISC ONNECT THE PRODUCT FROM THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR RE PAIR PROCEDURES.

2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED FOR A LL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK.

3. WHEN P ERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWE R SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWER S UPPLY AND OTHER ELECTRONIC COMPONENTS.

WARNING

1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN.

2. MAKE CE RTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SER IAL NUMBER/ RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER S OURC E, DO NOT CONNECT IT TO THE POWER SOURCE.

3. ALWAYS V ERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.

4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH A S

About This Manual

This manual describes basic f unctions, theory of electrical and mechanical operations, maintenance and repair procedures of EPSO N Stylus Color 680/777/777i. The instructions and procedures included herein are intended for the experienced repair technicians, and attention should be given to the precautions on the preceding page.

Contents

This manual consists of six chapters and one Appendix.

CHAPTER 1.PRODUCT DESCRIPTIONS

Provides a general overview and specifications of the product.

CHAPTER 2.OPERATING PRINCIPLES

Describes the theory of electrical and mechanical operations of the product.

CHAPTER 3.TROUBLESHOOTING

Provides the step-by-step procedures for the troubleshooting.

CHAPTER 4.DISASSEMBLY AND ASSEMBLY

Describes the step-by-step procedures for dissaembling and assembling the product.

CHAPTER 5.ADJUSTMENTS

Provides Epson-approved methods for adjustment.

CHAPTER 6.MAINTENANCE

Provides preventive maintenance procedures and the lists of Epson-approved lubricants and a dhesives required for servicing the product.

APPENDIXProvides the following additional information for reference:

• Connector pin assignments

• Electric circuit boards c omponents layout

• Exploded diagram

• Electricalcircuitboardsschematics

Symbols Used in This Manual

Various symbols are used throughout this manual either to provide additional information on a specific topic or to warn of possible danger present during a procedure or an a ction. B e aware of all symbols when they are used, and always read W ARNI NG, CAUTION or NOTE messages.

W A R N I N G

C A U T I O N

C H E C K

P O I N T

Indicates an operating or maintenance procedure, practice or condition that, if not strictly observed, could result in injury or loss of life.

Indicates an operating or maintenance procedure, practice, or condition that, if not strictly observed, could re sult in damage to, or destruction of, equipment.

May indicate an operating or maintenance procedure, practice or condition that is necessary to accomplish a task efficiently. It may also provide additional information that is related to a specific subject, or comment on the results achieved through a previous action.

Revision Status

Revision Issued Date Description

A August 10, 2000 First Release

Revision:

B August 31, 2000

Added disassembly and reassembly caution to 4.2.1 Housing Removal

Changed the resolution of bit map images when producing PDF files for clearer reading.

Chapter 1 PRODUCT DESCRIPTION

1.1 FEATURES ........................................................................................ 10

1.2 SPECIFICATIONS..............................................................................11

1.2.1 Physical Specification............................................................... 11

1.2.2 Printing Specification................................................................ 11

1.2.3 Paper Feeding.......................................................................... 12

1.2.4 Input Data Buffer...................................................................... 12

1.2.5 Electric Specification................................................................ 12

1.2.6 Environmental Condition.......................................................... 13

1.2.7 Reliability.................................................................................. 13

1.2.8 Safety Approvals...................................................................... 13

1.2.9 Acoustic Noise.......................................................................... 13

1.2.10 CE Marking............................................................................. 13

1.3 INTERFACE....................................................................................... 14

1.3.1 Parallel Interface (Forward Channel) ....................................... 14

1.3.2 Parallel Interface (Reserve Channel)....................................... 17

1.3.3 USB Interface........................................................................... 18

1.3.4 Prevention of Data Transfer Time-out...................................... 19

1.3.5 Interface Selection.................................................................... 19

1.3.6 IEEE1284.4 Protocol ................................................................19

1.4 OPERATOR CONTROLS .................................................................. 20

1.4.1 Operating Switch...................................................................... 20

1.4.2 Control P anel............................................................................ 20

1.4.3 Panel Functions........................................................................ 21

1.4.4 Printer Condition and Panel Status.......................................... 22

1.4.5 Printer Initialization................................................................... 22

1.4.6 Errors........................................................................................ 23

1.5 PAPER ............................................................................................... 24

1.5.1 Paper Handling......................................................................... 24

1.5.2 Paper Specification.................................................................. 24

1.5.3 Printing Area............................................................................. 26

1.6 INK CARTRIDGE............................................................................... 28

1.6.1 Black Ink Cartridge................................................................... 28

1.6.2 Color Ink Cartridge................................................................... 28

2.1.1 Printer Mechanism ................................................................... 30

2.1.2 Printhead.................................................................................. 31

2.1.3 Carriage Mechanism ................................................................ 33

2.1.4 Paper Feeding Mechanism ...................................................... 34

2.1.5 Paper Loading Mechanism (ASF Unit)..................................... 35

2.1.6 Ink System Mechanism............................................................ 38

2.2 Electrical CircuitO perating Principles................................................ 40

2.2.1 C383 PSB/PS E board.............................................................. 40

2.2.2 C383 MAIN Board.................................................................... 43

Chapter 3 Troubleshooting

3.1 Overview ............................................................................................ 50

3.2 Troubleshooting with LED Error Indications....................................... 51

Chapter 4 Disassembly and Assembly

4.1 Overview ............................................................................................ 62

4.1.1 Precautions .............................................................................. 62

4.1.2 Tools ........................................................................................ 63

4.1.3 Work Completion Check .......................................................... 64

4.2 Disassembly....................................................................................... 65

4.2.1 Housing removal...................................................................... 66

4.2.2 OperationPanel removal ......................................................... 67

4.2.3 Printhead removal .................................................................... 68

4.2.4 CR motor removal.................................................................... 71

4.2.5 Waste drain ink pad unit removal ............................................. 73

4.2.6 Circuit board removal............................................................... 75

4.2.7 LD Roller removal .................................................................... 79

4.2.8 HP/PE Sensor removal............................................................ 83

4.2.9 Ink system unit removal (Cap & Pump unit )............................ 85

4.2.10 Paper Eject Roller removal .................................................... 87

4.2.11 PF motor removal................................................................... 89

4.2.12 CR unit removal ..................................................................... 91

4.2.13 Paper feed roller removal....................................................... 94

4.2.14 DisassemblingASF frame unit............................................... 97

Chapter 2 Operating Principles

2.1 Overview............................................................................................. 30

Chapter 5 Adjustment

5.1 Overview .......................................................................................... 101

5.1.1 Required Adjustment.............................................................. 101

5.1.2 Adjustment Program feature.................................................. 102

5.1.3 Adjustment Program Installation Procedure........................... 103

5.1.4 Adjustment Program Initial Setting menu...............................103

5.1.5 Head ID Input......................................................................... 103

5.1.6 Bi-D Adjustment .....................................................................105

5.1.7 USB ID input...........................................................................107

5.1.8 Head Cleaning Operation . ...................................................... 109

5.1.9 Initial Ink Charge Operation.................................................... 110

5.1.10 Refurbishmentfor DOA........................................................ 111

5.1.11 Protection Counter Check/Reset.......................................... 112

5.1.12 Check pattern printing.......................................................... 114

5.1.13 EEPROM check function...................................................... 115

5.1.14 CSIC Information.................................................................. 116

Chapter 6 Maintenance

6.1 Overview...........................................................................................1 18

6.1.1 Cleaning................................................................................. 118

6.1.2 Service Maintenance.............................................................. 119

6.1.3 Lubrication..............................................................................1 19

Chapter 7 Appendix

7.1 Connector Sum mary......................................................................... 124

7.1.1 Major Component Unit ........................................................... 124

7.1.2 EEPROM Address Map.......................................................... 127

7.2 C omponent L ayout........................................................................... 1 31

7.3 Expl oded Diagram.. .......................................................................... 133

7.4 Parts List........................................................................................... 138

7.5 Electrical Circuits.............................................................................. 141

PRODUCTDESCRIPTION

CHAPTER

EPSON Stylus COLOR 680/777/777i Revision B

1.1 FEATURES

The major features of EPSON color inkjet printers EPSON Stylus COLOR 680/777/ 777i are:

High Color Print Qua lity

2880 (H) X 720 (V) dpi printing

Four Color Printing (YMCK)

Traditional and New Microweave

Built-inAutoSheetFeeder

Holds 100 cut-sheets(64g/m2)

Holds 10 envelopes

Holds 1 transparency films

Two Built-in Interfaces

Bi-directional parallel I/F (IEEE-1284level 1 device)

USB

Windows/Macintosh exclusive

Figure 1-1. External View

PRODUCT DESCRIPTION

EATURES 10

EPSON Stylus COLOR 680/777/777i Revision B

1.2 SPECIFICATIONS

This section covers specifications of the printers.

1.2.1 Physical Specification

Weight: 4.1kg (without ink cartridges)

Dimension:

Storage: 450 mm (W) x 246 mm (D) x 182 mm (H) Printing: 450 mm (W) x 547 mm (D) x 279 mm (H)

1.2.2 Printing Specification

Print Method

On demand ink jet

Nozzle Configuration

Monochrome 144 noz zles (48 x 3 staggered)

Color 48 nozzles x 3 (Cyan, Magenta, Yellow)

Print Direction

Bi-direction with logic seeking

Control Code

ESC/P Raster command

EPSON Remote command

Character Tables

Two international character sets:

- PC 437 (US, Standard Europe)

Typeface

Bit map LQ font: EPSON Courier 10 CPI

Table1-2. RasterGraphicsMode

Horizontal Resolution

360 dpi 8.26 inches 2976 23.8 IPS 720 dpi 8.26 inches 5952 20 IPS

1440 dpi 8.26 inches 11904 20 IPS

Printable Area AvailableDot CR Speed

Print Speed & Printable Columns

Table 1-1. Character Mode

CharacterPitch PrintableColumn LQ Speed

10 CPI (Pica) 80 238 CPS*

*This value is the speed of normal-dot printing.

PRODUCT DESCRIPTION

PECIFICATIONS 11

EPSON Stylus COLOR 680/777/777i Revision B

1.2.3 Paper Feeding

Feed Method

Friction feed with ASF

Paper Path

Cut-sheet ASF (Top entry, Front out)

Feed Speed

2.36 inch/sec (Normal, Continuous feed)

4.5 inch/sec (Fast, Continues feed)

1.2.4 Input Data Buffer

32KB

1.2.5 Electric Specification

[120V Version]

Rated Voltage: AC120V Input Voltage Range: AC99∼132V Rated Frequency Range: 50∼ 60Hz Input Frequency Ra nge: 49.5∼ 60.5Hz Rated Current: 0.4A Power Consumption: Approx. 17W (ISO10561 Letter Pattern)

Approx. 2.5W in standby m ode Energy Star compliant

Insulation Resistance: 100M ohms min.

(between AC line and chassis, DC 500V)

Dielectric Strength: AC 1000V rms. 1 minutes or

AC 1200V rms. 1 second (betweenAC line and chassis)

[220 ∼ 240V Version]

Rated Voltage: AC220V∼240V Input Voltage Range: AC198∼264V Rated Frequency R ange: 50∼60Hz Input Frequency Range: 49.5∼60.5Hz Rated Current: 0. 2 A (for Stylus Color 860)

0.2 A (for Stylus Color 1160)

Power Consumption: Approx. 17W (ISO10561 Letter Pattern)

Approx. 2.5W in standby mode Energy Star compliant

Insulation Resistance: 100M ohms min.

(between AC line and chassis, DC 500V)

Dielectric Strength: AC 1500V rms. 1 minute

(between AC line and chassis)

PRODUCT DESCRIPTION

PECIFICATIONS 12

EPSON Stylus COLOR 680/777/777i Revision B

1.2.6 Environmental Condition

Temperature

Operating: 10 to 35°C (see the figure below for condition)

Non-operating: -20 to 60°C (with shipment container)

1monthat40°C and 120 hours at 60°C

Humidity

Operating: 20 to 80% RH

(without c ondensation / see the figure below for condition)

Non-operating: 5 to 85% RH

(without c ondensation / with shipment container)

Resistance to Shock

Operating: 1G, within 1 ms

Non-operating: 2G, within 2 ms (with shipment container)

Resistance to Vibration

Operating: 0.15G

Non-operating: 0.50G (with s hipment container)

90 80 70

Humidity (%)

50 40 30 20

Temperature (°C)

1.2.7 Reliability

Total Print Volume: 50,000 pages (A4, Letter)

or 5 years although less than 50.000 pages printing

Print Head Life: 3 billion dots/nozzle

1.2.8 Safety Approvals

[120V Version]

Safety Standards: UL1950

CSA22.2 No.950

EMI: FCC part 15 subpart B Class B

CSA C108.8 Class B

[220∼240V Version]

Safety Standards: EN60950 (VDE) EMI: EN55022 (CISPR Pub.22) Class B

AS/NZS 3548 Class B

1.2.9 Acoustic Noise

Level: Approx. 47dB(A) (According to ISO 7779)

-Used media : Plain Paper

- Print Quality: Fine

1.2.10 CE Marking

[220∼240V Version]

Low Voltage Directive 73/23/EEC: EN60950 EMC Directive 89/336/EEC: EN55022 Class B

EN61000-3-2 EN61000-3-3 EN50082-1

35 40

IEC801-2 IEC801-3 IEC801-4

Figure 1-2. Temperature/Humidity Range

PRODUCT DESCRIPTION

PECIFICATIONS 13

EPSON Stylus COLOR 680/777/777i Revision B

1.3 INTERFACE

The EPSON Stylus COLOR 680/777/777i provide USB and parallel interface as standard.

1.3.1 Parallel Interface (Forward Channel)

Transmission Mode: 8 bit parallel, IEEE-1284 compatibility m ode Synchronization: By STROBE pulse Handshaking: BY BUSY and ACKNLG signal Signal Level: TTL compatible level Adaptable Connector: 57-30360 (amphenol) or equivalent

BUSY signal is set high before setting either -ERROR low or PE high, and held high until all these signals return to their inactive state.

BUSY signal is at high level in t he following cases:

During data entry (see data transmission timing).

When input data buffer is full.

During -INIT signal is at low level or during hardware initialization.

During printer error (see -ERROR signal).

When the parallel interface is not selected.

ERROR signal is at low le vel when the printer is in one of the following states:

Printer hardware error (fatal error)

Paper-out e rror

Paper-jam error

Ink-out error

PE signal is at high level during paper-out e rror.

DATA

-STROBE tsetup

BUSY

tready

-ACKNLG

databyte n

thold

tbusy

treply

tstb

tack

tnbusy

Figure 1-3. Data Transmission Timing

Table 1-3.

Parameter Minimum Maximum

tsetup 500ns -

thold 500ns -

tstb 500ns -

tready 0 -

tbusy - 500ns tt-out* - 120ns tt-in** - 200ns

treply 0 -

tack 500ns 10us

tnbusy 0 -

tnext 0 -

databyte n+1

tnext

* Rise and fall time of every output signal. ** Rise and fall time of e very input signal. *** Typical timing for tack is shown on the following page.

PRODUCT DESCRIPTION INTERFACE 14

EPSON Stylus COLOR 680/777/777i Revision B

Table 1-4. Typical Time of tack

Parallel I/F Mode TypicalTime of tack

High Speed 0.5us

Normal Speed 2us

Table 1-5. Signal Level: TTL Compatible (IEEE-1284 level 1 d evice)

Parameter Minimum Maximum Condition

VOH* - 5.5V VOL* -0.5V -

IOH* - 0.32mA VOH = 2. 4V IOL* - 12mA VOL = 0.4V

CO - 50pF

VIH - 2.0V

VIL 0.8V -

IIH - 0.32mA VIH = 2.0V IIL - 12mA VIL = 0.8V

CI - 50pF

* A low logic level on the Logic H signal is 2.0V or less when the printer

is powered off, and this signal is equal to or exceeding 3.0V whe n the printer is powered on. The receiver shall provide an impedance equivalent to 7.5K ohm to ground.

Table 1-6. Connector Pin Assignment and Signals

Pin No. Signal Name

1 -STROBE 19 In

2 DATA0 20 In 3 DATA1 21 In 4 DATA2 22 In 5 DATA3 23 In 6 DATA4 24 In 7 DATA5 25 In 8 DATA6 26 In 9 DATA7 27 In

10 -ACKNLG 28 Out

11 BUSY 29 Out

12 PE 28 Out A high signal indicates paper-out error.

13 SLCT 28 Out

14 -AFXT 30 In Not used.

Return

GND Pin

In/Out Functional Description

The strobe pulse. Read-in of data is performed at the falling edge of this pulse.

The DATA0 through DATA7 signals represent data bits 0 to 7, respectively.

Each signali s at high level when datais logical 1 and low level when data is logical0.

This signal is a negative pulse indicating that the printer can accept data again.

A high signal indicates that the printer cannot receive data.

Always at high level when the printer is powered on.

The falling edge of a negative pulse or a

31 -INIT 30 In

32 -ERROR 29 Out

36 -SLIN 30 In Not used. 18 Logic H - Out Pulled up to +5V via 3.9 K ohm resistor.

low signal on this line causes the printer to initialize. Minimum 50us pulse is necessary.

A low signal indicatesprinter error condition.

PRODUCT DESCRIPTION INTERFACE 15

EPSON Stylus COLOR 680/777/777i Revision B

Table 1-6. Connector Pin Assignment and Signals (continued)

Pin No. SignalName

35 +5V - Out Pulledupto+5Vvia3.3Kohmresistor. 17 Chassis GND - - Chassis GND

16,33,

19-30 15,34 NC - - Not connected

GND - - Signal GND

Return

GND Pin

In/Out Functional Description

NOTE: In/Out refers to the direction of signal flow seen f rom the printer side.

PRODUCT DESCRIPTION INTERFACE 16

EPSON Stylus COLOR 680/777/777i Revision B

1.3.2 Parallel Interface (Reserve Channel)

Transmission Mode: IEEE-1284 nibble mode Adaptable Connector See forward channel. Synchronization: Refer to the IEEE-1284 specification Handshaking: Refer to the IEEE-1284 specification Data Trans. T iming: Refer to the IEEE-1284 specification Signal Level: IEEE-1284 level 1 device

See forward channel.

Table 1-7. Connector Pin Assignment and Signals

Pin No. Signal Name

1 HostClk 19 In Host clock signal. 2 DATA0 20 In 3 DATA1 2 1 In 4 DATA2 22 In 5 DATA3 2 3 In 6 DATA4 24 In 7 DATA5 2 5 In 8 DATA6 26 In 9 DATA7 2 7 In

10 PtrClk 28 Out Printer clock signal.

Return

GND Pin

In/Out Functional Description

The DATA0 through DATA7 signals represent data bits 0 to 7, respectively.

Each signal is at high level when data is logical1 and low level when data is logical0.

These signals are used to transfer the 1284 extensibility request values to the printer.

Table 1-7. Connector Pin Assignment and S ignals ( continued)

Pin No. Signal Name

36 1284-Active 30 In 1284 active signal. 18 Logic-H - Out Pulled up to +5V via 3.9K ohm resistor. 35 +5V - Out Pulled up to +5V via 3.3K ohm resistor. 17 ChassisGND - - Chassis GND

16,33,

19-30 15,34 NC - - Not connected

-DataAvail / DataBit-0,4

GND - - Signal GND

NOTE: In/Out refers to the direction of signal flow from the printer’s point of

view.

Extensibility Request:

The printer responds affirmatively when the extensibilityrequest values are 00H or 04H, which means,

00H: Request Nibble Mode Reverse C hannel Transfer. 04H: Request Device ID;

Return Data Using Nibble Mode Rev Channel T ransfer.

Return

GND Pin

29 Out

In/Out Functional Description

Dataavailablesignaland reversechannel transfer data bit 0 or 4.

14 HostBusy 30 In Host busy signal. 31 -INIT 30 In Not used.

PtrBusy /

DataBit-3,7

AckDataReq / DataBit-2,6

Xflag /

DataBit-1,5

29 Out

28 Out

Printer busy signal and reverse channel transferdata bit 3 or 7.

Acknowledge data request signal and reverse channel transfer data bit 2 or 6.

X-flag signal and reverse channel transferdata bit 1 or 5.

PRODUCT DESCRIPTION INTERFACE 17

EPSON Stylus COLOR 680/777/777i Revision B

Device ID:

The printer s ends the following device ID string when requested.

When IEEE1284.4 is enabled,

[00H] [5AH] MFG: EPSON; CMD: ESCPL2, BDC, D4; MDL: Stylus[SP]COLOR[SP]XXX*; CLS: PRINTER; DES: EPSON[SP]Stylus[SP]COLOR[SP]XXX*;

When IEEE1284.4 is disabled,

[00H] [57H] MFG: EPSON; CMD: ESCPL2, BDC; MDL: Stylus[SP]COLOR[SP]XXX*; CLS: PRINTER; DES: EPSON[SP]Stylus[SP]COLOR[SP]860/1160; *XXX is 777 (for EAI spec) or 680 (for EURO/ASIA spec)

Note 1: [00H] denotes a hexadecimal value of zero. Note2: MDL value depends on the EEPROM setting. Note3: CMD value depends on the IEEE1284.4 setting.

1.3.3 USB Interface

Standard: Based on:

“Universal Serial Bus Specifications Rev. 1.0” “UniversalSerial Bus Device Class Definition

for Printing Devices Version 1.0” Bit Rate: 12Mbps (Full Speed Device) Data Encoding: NRZI Adaptable Connector: USB Series B Recommended Cable Length: 2 meters

Table 1-8. Connector Pin Assignment and Signals

Pin No. Signal Name I/O Function Description

1 VCC - Cable power. Max.power consumption is 2mA. 2 -Data Bi-D Da ta 3 +Data Bi-D Data, pull up to +3.3 V via 1.5K ohm resistor. 4 Ground - Cable ground

Pin #2

Pin #1

Pin #3

Pin #4

Figure 1-4. USB Pin Assignment

PRODUCT DESCRIPTION INTERFACE 18

EPSON Stylus COLOR 680/777/777i Revision B

1.3.4 Prevention of Data Transfer Time-out

Generally,hosts abandon data transfer to peripherals when the peripheral is in the busy state for dozens of seconds continuously. To prevent this kind of time-out, the printer receives data very slowly, several bytes per minute, even if the printer is in the busy state. The slowdown starts when the remaining input buffer becomes several hundreds of bytes, and the printer finally gets into the busy state continuously when the input buffer is full. USB and IEEE1284.4 on the parallel interface do not require such function.

On An initial state is IEEE1284.4communication and data that received it by thetime it is able to take synchronization by magic string (1284.4 synchronous commands) is discarded.

Off An initial state is compatible interface and never starts IEEE1284.4 communication even if magic strings (1284.4 synchronous commands) are received.

1.3.5 Interface Selection

The printer ha s two built-in interfaces: the USB and parallel interface. These interfaces are selected automatically.

Automatic Selection In thisautomatic interface selection mode, the printer is initialized to the idle state while scanning which interface receives data when it is powered on. Then the interface which received data first is selected. Whe n the host stops data transfer and the printer is in the s tand-by statefor seconds,the printer is returned to the idle state.As long as the host sends data or the printer interface is in the busy state, the selected interface is let as it is.

Interface State and Interface Selection When the parallel interface is not selected, the interface gets into the busy state. When the printer is initialized or returned to the idle state, the parallel interface gets into the ready state. Note that the interrupt signal such as the -INIT signal on the parallel interface is not effective while that interface is not selected.

1.3.6 IEEE1284.4 Protocol

The packet protocol described by IEEE1284.4 standard allows a device to carry on multiple exchanges or conversations which contain data and/or control information with another device at the same timeacross a singlepoint-to-pointlink. The protocol is not, however, a device control language. It does provide basic transport-level flow controland multiplexingservices. The multiplexedlogical channels are independent of each other a nd blocking of one has no effect on the others. The protocol operates over IEEE1284.

Automatic Selection An initial stateis compatible interface and starts IEEE1284.4 communication when magic strings (1284.4 synchronous commands) are received.

PRODUCT DESCRIPTION INTERFACE 19

EPSON Stylus COLOR 680/777/777i Revision B

1.4 OPERATOR CONTROLS

1.4.1 Operating Switch

Operating switch is located on the control panel.

1.4.2 Control Panel

1.4.2.1 Switches

There are two non-lock type push switches, one lock-type push switch, and two LED lights.

Power

Maintenance

1.4.2.2 Indicators

(1) Power

Lights when the operating switch is “ON” and AC power is supplied.

(2) Error

Lights or blinks when some error has occur to the printer.

Ink Cartridge replacement

Figure 1-5. Control Panel

PRODUCT DESCRIPTION

PERATOR CONTROLS 20

EPSON Stylus COLOR 680/777/777i Revision B

1.4.3 Panel Functions

Table 1-9. Panel Functions

Switch Function

Maintenance

Ink Cartridge replacement

* This function is not available in printing status.

Switch Function

Maintenance

Ink Cartridge

replacement

Maintenance

Ink Cartridge

replacement

• Loads or Ejects the Paper (Pushing within 3seconds).

• Starts the Cleaning of head (Pushing for 3seconds).

• When carriage is on t he Ink Cartridgechange position, return carriage from Ink Cartridge change position.

• Starts the Ink Cartridge change sequence. *

Table 1-10. Panel Functions with Power On

• Start status printings.

• Select IEEE 1284.4 mode for parallel I/F. *1

• Enters the special setting mode (Factory use only). *3

Table 1-11. Special S etting Mod e

Switch Function

Maintenance

Ink Cartridge replacement

(10 seconds)

• Initialize EEPROM.

• Reset the ink overflow counterin the EEPROM.

*1 Not described in the user's manual. *2 See the table

PRODUCT DESCRIPTION

PERATOR CONTROLS 21

EPSON Stylus COLOR 680/777/777i Revision B

1.4.4 Printer Condition and Panel Status

Table 1-12. Printer Condition and LED S tatus

Printer Status

Power ON condition On - 10 Ink sequence Blink - 6 Ink Cartridge changemode Blink - 5 Data processing Blink - 9 Paper Out - On 4 Paper jam condition - On 3 Ink end (Black) - On -> Blink 8 Ink levellow ( Black) - Blink 8 Ink end (Color) - On -> Blink2 8 Ink level low (Color) - Blink 8 Ink end

(Black and Color) No Ink Cartridge

(Black and Color) Reset, Timer IC reset,

EEPROM clear Ink Overflow Counter reset On (2s) On (2s) Maintenance request

(Ink Overflow Counter error)

Power Er ror

- Blink -> Blink 8

- On 7

On (1s) On (1s) -

Alt Blink Alt Blink 2

Indicators

Priority

1.4.5 Printer Initialization

There are three kinds of initialization m ethods, and the following explains each initialization.

1. Power-on Initialization This printer is initialized when turning the printerpower 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 printerpower 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 ESC@ command also initialize the printer.

When printer is initialized, the following actions are performed: (a) Clears print buffer. (b) Sets default values.

Fatal error Off On 1 Specialsetting Blink Blink -

" - " : Indicator status don't change. " A -> B " : A is a indicator condition when carriage is on Home Position.

B is a indicator conditionin Ink exchange sequence.

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EPSON Stylus COLOR 680/777/777i Revision B

1.4.6 Errors

Ink Out

When the printer runs out most of the ink of any color, it indicates ink-low and keeps printing. When the printer runs out the whole ink of any color, it stops printing and indicates ink-out error. User is then requested to install a new inkcartridge in this state. An ink-cartridge that has be en taken out once should never be used again. Re-installationof the cartridge not filled fully upsets the ink level detection and may eventually cause a serious problem in the print head.

Paper Out

When the printer fails to load a sheet, it goes into a paper out error.

Paper Jam

When the printer fails to eject a sheet, it goes into a paper jam error.

No Ink-Cartridge

When the printer detects that ink-cartridge comes off, or failed to read or write CSIC data, it goes into this error mode.

Maintenance Request

When the total amount of ink wastedthrough cleanings and flushing reachesto the limit, printer indicates this error and stops. In such a case, the absorber in the printer enclosure needs to be replaced with new one by service personnel.

Fatal Errors

Carriage control error.

PRODUCT DESCRIPTION

PERATOR CONTROLS 23

EPSON Stylus COLOR 680/777/777i Revision B

1.5 PAPER

1.5.1 Paper Handling

Do not perform reverse feed more than 1.8mm (0.07”).

1.5.2 Paper Specification

1.5.2.1 Cut Sheet

[Size]

A4: Width 210mm (8.3”) x Length 297mm (11.7”) A5: Width 148mm (5.8”) x Length 210mm (8.3”) A6: Width 105mm (4.1”) x Length 148mm (5.8”) Letter: Width 216mm (8.5”) x Length 279mm (11.0”) Half Letter: Width 139.7mm (5.5”) x Length 216mm (8.5”) B5: Width 182mm (7.2”) x Length 257mm (10.1”) Legal: Width 216mm (8.5”) x Length 356mm (14.0”) Executive: Width 184.2mm (7.25”) x Length 266.7mm (10.5”)

[Thickness]

0.08mm (0.003”) - 0.11mm (0.004”)

[Weight]

64g/m

[Quality]

(17Ib.) - 90g/m2(24Ib.)

1.5.2.2 Transparency, Glossy Paper

[Size]

A4: Width 210mm (8.3”) x Length 297mm (11.7”) Letter: Width 216mm (8.5”) x Length 279mm (11.0”)

[Thickness]

0.075mm (0.003”) - 0.085mm (0.0033”)

[ASF hopper availablecapacity]

1sheets

Note: Transparency printing is available only at normal temperature.

1.5.2.3 Envelope

[Size]

No.10: Width 241mm (9 1/2”) x Length 104.8mm (4 1/8”) DL: Width 220mm (8.7”) x Length 110mm (4.3”) C6: Width 162mm (6.4”) x Length 114mm (4.5”)

[Thickness]

0.16mm (0.006”) - 0.52mm (0.02”)

[Weight]

45g/m2(12Ib.) - 75g/m2(20Ib.)

Exclusive paper, Bond paper, PPC

[ASF hopper available capacity]

100 sheets

Note1: No wrinkled, scuffing, torn or folded paper be used. Note2: No curled paper more than 5 mm be used.

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EPSON Stylus COLOR 680/777/777i Revision B

[Quality]

Bond paper, Plain paper, Air mail

Note1: Envelope printing is available only at normal temperature. Note 2: Keep the longer side of the envelope horizontally at setting. Note 3: Envelope printing is available only in t he normal temperature. Note 4: No wrinkled,scuffing, torn or folded paper be used. Note 5: No curled paper more than 5mm be used. Note 6: No paper with glue on flap be used. Note 7: No double envelops nor with window envelops be used. Note 8: Do not print on the back.

1.5.2.4 Index Card

[Size]

A6 Index Card: Width 105mm (4.1”) x Length 148mm ( 5.8”) A5 Index Card: Width 148mm (5.8”) x Length 210mm ( 8.3”) 5 x 8” Index Card: Width 127mm (5.0” x Length 203mm (8.0”) 10 x 8” Index Card: Width 127mm (5.0”) x Length 203mm (8.0”)

[Thickness]

Less than 0.23mm (0.0091”)

[ASF hopper available capacity]

30 sheets

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EPSON Stylus COLOR 680/777/777i Revision B

1.5.3 Printing Area

1.5.3.1 Cut Sheet

See the figure be low and tables on the right for printable areas.

Printable Area

Table 1-13. Printing Area

Left Margin

Paper Size

A4 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”)

Letter 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”)

B5 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”)

Legal 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”)

Statement 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”)

Exclusive 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”)

(min.)

* Bottom margin can be reduced to 3mm when paper dimension is

defined by using command, otherwise it is not reduced (14mm). As for an area between 3mm and 14mm margin, printing quality may decline.

** Refer to 1.5.2 Paper Specification for PW (paper width) and PL

(paper length).

Right Margin

(min.)

Top Margin

(min.)

14 mm (0.54”)/ 3mm (0.12”) *

Bottom Margin

(min.)

Figure 1-6. Printable Area for Cut S heet

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EPSON Stylus COLOR 680/777/777i Revision B

1.5.3.2 Envelopes

Printable Area

Figure 1-7. Printable Area for Envelopes

Table 1-14. Envelope Margin

Size

#10 3 mm (0.12”) 28 mm (1.10”) 3 mm (0.12”) 14 mm (0.55”)

Left M a rgin

(min.)

Right M argin

(min.)

Top Margin

(min.)

Bottom Margin

(min.)

DL 3 mm (0.12”) 7 mm (0.28”) 3 mm (0.12”) 14 mm (0.55”)

C6 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”) 14 mm (0.55”)

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EPSON Stylus COLOR 680/777/777i Revision B

1.6 INK CARTRIDGE

1.6.1 Black Ink Cartridge

Type: Exclusive Cartridge Color: Black Print Capacity: 600 pages/A4

(ISO/IEC 10561 Letter Pattern at 360 dpi) Ink Life: 2 years from date of production Storage Temperature:

Storage: -20 Packing: -30 Transit: -30

Dimension: 28.1 mm (W) x 66.85 mm (D) x 43.3 mm (H)

Cto40oC (within a month at 40oC)

Cto60oC (within 120 hours at 60oC

and within a month at 40

1.6.2 Color Ink Cartridge

Type: Exclusive Cartridge Color: Magenta, Cyan, Yellow Print Capacity: 300 pages / A4 (360 dpi, 5% duty each color) Ink Life: 2 years from date of production Storage Temperature:

Storage: -20 Packing: -30 Transit: -30

Dimension: 43.2 mm (W) x 66.85 mm (D) x 43.3 mm (H)

Cto40oC (within a month at 40oC)

Cto60oC (within 120 hours at 60oC

and within a month at 40

Figure 1-9. Color Ink Cartridge

Note 1: Ink cartridge can not be refilled. The ink cartridge is prepared only

for article of consumption. Note 2: Do not use the ink cartridge which c ontains life-expired ink. Note 3: Ink will be frozen under -4

C environment; however, it will be

usable after being left at room temperature for more than three

Figure 1-8. Black Ink Cartridge

hours.

PRODUCT DESCRIPTION INK CARTRIDGE 28

OPERATINGPRINCIPLES

CHAPTER

EPSON Stylus COLOR 680/777/77i Revision B

2.1 Overview

This section describes the operating principles of the printer m echanism and electrical circuit boards.The Stylus COLOR 680/777/777i has the following boards:

Main board: C383 MAIN (C383 MAIN-B)

NOTE: C383 MAIN-B is compatible with C383 MAIN. Only some chips or parts

are differentfrom each other due to different producers.

Power supply board: C383 PSB/PSE

Panel board: C383 PNL

2.1.1 Printer Mechanism

The printer m echanism for Stylus COLOR 680/777/777i is designed newly. But, the basic component of the printer mechanism is same as previous product. This printer consists of Print Head, Carriage Mechanism, Paper Feeding Mechanism, Paper Loading Mechanism, Ink System (Pump Mechanism, Cap Mechanism, and Carriage Lock Mechanism).

Like other E PSON ink jet printers, the Stylus COLOR 680/777/777i is equipped with two stepping motors; one for ASF, Paper feeding/ Pump m echanism, and one for CR mechanism.ASF unit uses rear entry front eject system. This ASF unit is also designed newly and single LD roller loads the paper to the printer mechanism.

PF Motor

Star Wheel Roller

CR unit

Paper Eject Roller

PF Roller

CR Timingbelt

HP/PE/IC Sensor sensor

LD Roller

Paper feed back plate

Paperseparationpad

ASF Hopper Spring

For cap assembly,Stylus COLOR680/777/777iuses valvelessmechanism;new design

CR lock lever

for this model.

Clutch mechanism

Pump Assembly

Cap Assembly

CR Motor

Figure 2-1. Printer Mechanism block diagram

Operating Principles

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