Epson 680Pro - LQ B/W Dot-matrix Printer, STYLUS COLOR 680, STYLUS COLOR 777, STYLUS COLOR 777i Service Manual
EPSON STYLUSCOLOR680/777/777i
Color Inkjet Printer
SEIJ00010
®
SERVICE MANUAL
Notice
o
All rights reserved. No part of this manual may b e 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.
o
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.
o
The contentsof this manual are subject to change without notice.
o
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.
o
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.
Copyright © 2000 SEIKO EPSON CORPORATION. Printed in Japan.
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 f atal 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 DISCONNECT THE PRODUCT FROM THE POWER SOURCE AND PERIPHERAL DE VICES PERFORMING ANY
MAINTENANCE OR REPAIR PROCEDURES.
2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASICSAFETY MEASURESAS DICTATED
FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK.
3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL
INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON
POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.
WARNING
1. REPAIRS O N EPSON PRODUCT SHOULD BE PERFORMED ONLY BY A N EPSON CERTIFIED REPAIR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME A S THE RATED VOLTAGE, LISTED ON THE S ER IAL NUMBER/
RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT
CONNECT IT TO THE POWER SOURCE.
3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FRO M THE POWER SOURCE BEFORE REMOVING OR
REPLACING PRINTED CIRCUIT BOA RDS AND/OR INDIVIDUAL CHIPS.
4. IN O RDER TO PROTECT SENSITIVE MICROPROCESSORS A ND CIRCUITRY, US E STATIC DISCHARGE EQUIPMENT, SUCH AS
About This Manual
This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPSON Stylus Color 680/777/777i.
The instructions and procedures included herein are intended for the experienced repair technicians, and a ttention 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 PRINCIPL ES
Describes the theory of e lectrical 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 a ssembling 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 adhesives
required for servicing the product.
APPENDIXProvides the following additional information for reference:
• Connector pin assignments
• Electric circuit boards components layout
• Exploded diagram
• Electrical circuit boardsschematics
Symbols Used in This Manual
Various symbols are used throughoutthis manual either to provide additional information on a specific topic or to warn of possible danger present during a
procedure or an action. Be aware of all symbols when they are used, and always read WARNING, CAUTION or NOTE m essages.
Indicates an operating or maintenanceprocedure,practice or condition that, if not strictlyobserved,could result in injury or loss of life.
Indicates an operating or maintenanceprocedure,practice,or condition that, if not strictly observed, could result 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.
W A R N IN G
C A U T I O N
C H E C K
P O I N T
Revision Status
Revision Issued Date Description
A August 10,2000 First Release
B August 31, 2000
Revision:
n
Added disassembly and reassembly caution to 4.2.1 Housing Removal
n
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 (F orward 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 Panel............................................................................ 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
Chapter 2 Operating Principles
2.1 Overview............................................................................................. 30
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 CircuitOperatingPrinciples................................................ 40
2.2.1 C383 PSB/PSE board .............................................................. 40
2.2.2 C383 MAIN Board.................................................................... 43
Chapter 3 Troubleshooting
3.1 Overview ............................................................................................ 50
3.2 Troubleshootingwith 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 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...........................................................................................118
6.1.1 Cleaning................................................................................. 118
6.1.2 Serv ice Maintenance.............................................................. 119
6.1.3 Lubrication.............................................................................. 119
Chapter 7 Appendix
7.1 Connector Summary......................................................................... 124
7.1.1 M ajor Component Unit ...........................................................124
7.1.2 EEPROM Address Map..........................................................127
7.2 Component Layout ........................................................................... 131
7.3 Exploded Diagram............................................................................ 133
7.4 Parts List........................................................................................... 138
7.5 Electrical Circuits.............................................................................. 141
CHAPTER
1
PRODUCTDESCRIPTION
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION
F
EATURES 10
1.1 FEATURES
The major features of EPSON color inkjetprinters EPSON Stylus COLOR 680/777/
777i are:
o
High Color Print Quality
n
2880 (H) X 720 (V) dpi printing
n
Four Color Printing (YMCK)
n
Traditionala nd New Microweave
o
Built-inAutoSheetFeeder
n
Holds 100 cut-sheets(64g/m2)
n
Holds 10 envelopes
n
Holds 1 transparencyfilms
o
Two Built-in Interfaces
n
Bi-directional parallel I/F (IEEE-1284level 1 device)
n
USB
o
Windows/Macintoshexclusive
Figure 1-1. External View
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION
S
PECIFICATIONS 11
1.2 SPECIFICATIONS
This section covers specificationsof the printers.
1.2.1 Physical Specification
o
Weight: 4.1kg (without ink cartridges)
o
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
o
Print Method
n
On demand ink jet
o
Nozzle Configuration
n
Monochrome 144 nozzles (48 x 3 staggered)
n
Color 48 nozzles x 3 (Cyan, Magenta,Yellow)
o
Print Direction
n
Bi-directionwith logic seeking
o
Print Speed & PrintableColumns
*This value is the speed of normal-dotprinting.
o
Control Code
n
ESC/P Raster command
n
EPSON Remote command
o
CharacterTables
n
Two international charactersets:
- PC 437 (US, Standard Europe)
o
Typeface
n
Bit map LQ font:
EPSON Courier 10 C PI
Table 1-1. Character Mode
CharacterPitch PrintableColumn LQ Speed
10 CPI (Pica) 80 238 CPS*
Table1-2. RasterGraphicsMode
Horizontal
Resolution
Printable Area AvailableDot CR Speed
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
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION
S
PECIFICATIONS 12
1.2.3 Paper Feeding
o
Feed Method
n
Friction feed with ASF
o
Paper Path
n
Cut-sheet ASF (Top entry,F ront out)
o
Feed Speed
n
2.36 inch/sec (Normal,Continuous feed)
n
4.5 inch/sec (Fast,Continues feed)
1.2.4 Input Data Buffer
n
32KB
1.2.5 Electric Specification
[120V Version]
Rated Voltage: AC120V
Input Voltage Range: AC99∼132V
Rated Frequency Range: 50∼ 60Hz
Input Frequency Range: 49.5∼ 60.5Hz
Rated Current: 0.4A
Power Consumption: Approx. 17W (ISO10561 Letter Pattern)
Approx. 2.5W in standby mode
EnergyStar 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 Range: 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)
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION
S
PECIFICATIONS 13
1.2.6 Environmental Condition
o
Temperature
n
Operating: 10 to 35°C (see the figure below for condition)
n
Non-operating: -20 to 60°C (with shipment container)
1monthat40°C and 120 hours at 60°C
o
Humidity
n
Operating: 20 to 80% RH
(without condensation/ s ee the figure below for
condition)
n
Non-operating: 5 to 85% RH
(without condensation / with shipment container)
o
Resistance to Shock
n
Operating: 1G, within 1 ms
n
Non-operating: 2G, within 2 ms (with shipment container)
o
Resistance to Vibration
n
Operating: 0.15G
n
Non-operating: 0.50G (with shipment container)
Figure 1-2. Temperature/Humidity Range
1.2.7 Reliability
Total Print Volume: 50,000 pages (A4, Letter)
or 5 years although less than 50.000pagesprinting
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: E N60950
EMC Directive 89/336/EEC: E N55022 Class B
EN61000-3-2
EN61000-3-3
EN50082-1
IEC801-2
IEC801-3
IEC801-4
10
273035 40
20
Temperature (°C)
20
30
40
50
90
80
70
60
Humidity (%)
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION INTERFACE 14
1.3 INTERFACE
The EPSON Stylus COLOR 680/777/777i provide USB andparallelinterface as
standard.
1.3.1 Parallel Interface (Forward Channel)
Transmission Mode: 8 bit parallel, IEEE-1284 compatibility mode
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 theiri nactive state.
BUSY signal is at high level in the following cases:
n
During data entry (see data transmissiontiming).
n
When input data buffer is full.
n
During -INIT signal is at low level or during hardwareinitialization.
n
During printer error (see -ERROR signal).
n
When the parallel interface is not selected.
ERROR signal is at low level when the printeris in one of the following states:
n
Printer hardware error (fatal error)
n
Paper-out error
n
Paper-jam error
n
Ink-out error
PE signal is at high level during paper-out error.
Figure 1-3. Data Transmission Timing
* Rise and fall time of every output signal.
** Riseand fall time of every input signal.
*** Typical timing for tack is shown on the following page.
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 -
DATA
databyte n
databyte n+1
-STROBE
BUSY
-ACKNLG
thold
tsetup
tstb
tready
tbusy
treply
tack
tnbusy
tnext
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION INTERFACE 15
* A low logic level on the Logic H signal is2. 0V or less when theprinter
is powered off, and this signal is equal to or exceeding 3.0V when the
printer is powered on.The receiver shall providean impedance
equivalent to 7.5K ohm to ground.
Table 1-4. Typical Time of tack
Parallel I/F Mode Typical Timeof tack
High Speed 0.5us
Normal Speed 2us
Table 1-5. Signal Level: TTL Compatible (IEEE-1284 level 1 device)
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
Table 1-6. Connector Pin Assignment and Signals
Pin No. Signal Name
Return
GND Pin
In/Out Functional Description
1 -STROBE 19 In
The strobe pulse. Read-in of data is
performed at the fallingedge of this
pulse.
2 DATA0 20 In
The DATA0 through DATA7 s ignals
represent data bits 0 to 7, respectively.
Each signalis at high levelwhen data is
logical 1 and low level when data is
logical0.
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
This signalis a negative pulse indicating
that theprinter can accept dataagain.
11 BUSY 29 Out
A high signal indicates thatthe printer
cannot receive data.
12 PE 28 Out A high signal indicates paper-out error.
13 SLCT 28 Out
Always athigh level when theprinter is
powered on.
14 -AFXT 30 In Not used.
31 -INIT 30 In
The fallingedge of a negativepulse or a
low signal on this line causesthe printer
to initialize. Minimum 50us pulse is
necessary.
32 -ERROR 29 Out
A low signal indicatesprinter error
condition.
36 -SLIN 30 In Not used.
18 Logic H - Out Pulled up to +5V via 3.9K ohm resistor.
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION INTERFACE 16
NOTE: In/Out refers to the direction of signal flow seen from theprinter side.
35 +5V - Out Pulledupto+5Vvia3.3Kohmresistor.
17 ChassisGND - - Chassis GND
16,33,
19-30
GND - - Signal GND
15,34 NC - - Not connected
Table 1-6. Connector Pin Assignment and Signals (continued)
Pin No. Signal Name
Return
GND Pin
In/Out Functional Description
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION INTERFACE 17
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. Timing: Refer to the IEEE-1284 specification
Signal Level: IEEE-1284 level 1 device
See forward channel.
NOTE: In/Out refers to the direction of signal flowfrom the printer’s point of
view.
Extensibility Request:
The printer responds affirmatively when the extensibilityre quest values are 00H or
04H, which means,
00H: Request NibbleMode Reverse Channel Transfer.
04H: Request DeviceID;
Return Data Using Nibble Mode Rev Channel Transfer.
Table 1-7. Connector Pin Assignment and Signals
Pin No. Signal Name
Return
GND Pin
In/Out Functional Description
1 HostClk 19 In Host clock signal.
2 DATA0 20 In
The DATA0 through DATA7 signals
represent data bits 0 to 7, respectively.
Each signal is athigh level when data is
logical1 and low level when data is
logical0.
These signals are used totransfer the
1284 extensibility request values to the
printer.
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 PtrClk 28 Out P rinter clock signal.
11
PtrBusy /
DataBit-3,7
29 Out
Printer busy signal and reverse channel
transferdata bit 3 or 7.
12
AckDataReq
/ DataBit-2,6
28 Out
Acknowledgedata request signal and
reversechannel transferdata bit 2or 6.
13
Xflag /
DataBit-1,5
28 Out
X-flag signal and reversechannel
transferdata bit 1 or 5.
14 HostBusy 30 In Host busysignal.
31 -INIT 30 In Not used.
32
-DataAvail/
DataBit-0,4
29 Out
Dataavailable signal andreversechannel
transferdata bit 0 or4.
36 1284-Active 30 In 1284 active signal.
18 Logic-H - Out Pulledup to +5V via 3.9Kohm resistor.
35 +5V - Out Pulled up to +5V via 3.3K ohm resistor.
17 Chassis GND - - Chassis GND
16,33,
19-30
GND - - Signal GND
15,34 NC - - Not connected
Table 1-7. Connector Pin Assignment and Signals (continued)
Pin No. Signal Name
Return
GND Pin
In/Out FunctionalDescription
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION INTERFACE 18
Device ID:
The printer sends the followingdevice 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 valueofzero.
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
Figure 1-4. USB Pin Assignment
Table 1-8. Connector Pin Assignment and Signals
Pin No. Signal Name I/O Function Description
1 VCC - Cable power. Max.power consumption is2mA.
2 -Data Bi-D Data
3 +Data Bi-D Data, pullup to +3.3 V via1.5K ohm resistor.
4 Ground - Cable ground
Pin #1
Pin #3
Pin #2
Pin #4
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION INTERFACE 19
1.3.4 Prevention of Data Transfer Ti me-out
Generally,hosts abandon data transferto peripherals when theperipheral is in the busy
state for dozens of secondscontinuously. To prevent thiskind of time-out,the printer
receives data very slowly,several bytes per minute, even if the printer is in the busy
state. The slowdown startsw hen the remaining input buffer becomes several hundreds
of bytes, and the printer finallygets into the busy state continuously when the input
buffer is full.
USB and IEEE1284.4 on the parallel interface do not require suchfunction.
1.3.5 Interface Selection
The printer has two built-ininterfaces: the USB and parallel interface.
These interfaces are selected automatically.
o
AutomaticSelection
In thisautomatic interface selection mode,the printer is initialized to the idlestate
while scanning which interfacereceives data when it is powered on. Then the
interface which received data first is selected. When the host stops data transfer
and theprinter is in thestand-by state forseconds, the printeris returned to theidle
state.As longasthe host sends data or the printerinterface is in the busy state,the
selected interface is let as it is.
o
Interface State and Interface Selection
When the parallel interfaceis not selected, the interface gets intothe busy state.
When the printeris initialized or returnedto the idle state, the parallelinterface
gets into the ready state. Notethat the interrupt signal such as the -INIT signal on
the parallel interfaceis not effective while that interface is not selected.
1.3.6 IEEE1284.4 Protocol
The packet protocol describedby IE EE1284.4 standard allows a device to carry on
multiple exchangesor conversations which contain data and/or control information
with anotherdevice at the sametime across a singlepoint-to-point link.T he protocol is
not, however, a device controllanguage. It does provide basic transport-level flow
controlandmultiplexing services.The multiplexedlogical channels areindependent of
each other and blocking of one has no effect on the others.The protocol operates over
IEEE1284.
o
AutomaticSelection
An initial stateis compatible interface and starts IEEE1284.4communication
when magic strings (1284.4 synchronous commands) are received.
o
On
An initial state is IEEE1284.4communication and datathat received it by thetime
it is ableto take synchronizationby magic string (1284.4synchronous commands)
is discarded.
o
Off
An initial stateis compatible interfaceand never starts IEEE1284.4
communication even if magic strings(1284.4 synchronous commands) are
received.
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION
O
PERATOR CONTROLS 20
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.
Figure 1-5. Control Panel
1.4.2.2 Indicators
(1) Power
Lights when the operating switchis “ON” and AC power is supplied.
(2) Error
Lights or blinks when some error has occur to the printer.
Power
Maintenance
Ink Cartridge replacement
21
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION
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PERATOR CONTROLS 21
1.4.3 Panel Functions
* This function is not available in printing status.
*1 Not described in the user's manual.
*2 See the table
.
Table 1-9. Panel Functions
Switch Function
Maintenance
• Loads or Ejects the Paper (Pushingwithin 3seconds).
• Starts the Cleaning of head(Pushing for 3seconds).
• When carriage is on the Ink Cartridge changeposition, return
carriage from Ink Cartridgechange position.
Ink Cartridge
replacement
• Starts the InkCartridge changesequence. *
Table 1-10. Panel Functions with Power On
Switch Function
Maintenance
• Start status printings.
Ink Cartridge
replacement
• Select IEEE 1284.4mode for parallelI/F. *1
Maintenance
+
Ink Cartridge
replacement
• Enters the special settingmode (Factory useonly). *3
Table 1-11. Special Setting Mod e
Switch Function
Maintenance
• Initialize EEPROM.
Ink Cartridge replacement
(10 seconds)
• Reset the ink overflow counterin the
EEPROM.
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION
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PERATOR CONTROLS 22
1.4.4 Printer Condition and Panel Status
" - " : Indicator status don't change.
" A -> B " : A is a indicatorcondition when carriage is on Home Position.
B is a indicator conditionin Ink exchange sequence.
1.4.5 Printer Initialization
There are three kinds of initialization methods,a nd the following explains each
initialization.
1. Power-on Initialization
This printer is initialized when turning the printerpower on, or printerrecognized
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 within10
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) Ejecta 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.
Table 1-12. Printer Condition and LED Status
Printer Status
Indicators
Priority
Power Error
Power ON condition On - 10
Ink sequence Blink - 6
Ink Cartridgechange mode Blink - 5
Data processing Blink - 9
Paper Out - On 4
Paper jam condition - On 3
Ink end (Black) - On ->Blink 8
Ink levellow (Black) - Bl ink 8
Ink end (Color) - On -> Blink2 8
Ink level low (Color) - Blink 8
Ink end
(Black andColor)
- Blink -> Blink 8
No Ink Cartridge
(Black andColor)
- On 7
Reset, Timer IC reset,
EEPROM clear
On (1s) On (1s) -
Ink Overflow Counter reset On (2s) On (2s) Maintenancerequest
(Ink Overflow Counter
error)
Alt Blink Alt Blink 2
Fatal error Off On 1
Specialsetting Blink Blink -
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION
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PERATOR CONTROLS 23
1.4.6 Errors
o
Ink Out
When the printer runs out most of the ink of any color, it indicates ink-low and
keeps printing. When the printerruns 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 been taken out once should never
be used again. Re-installationof the cartridge not filled fully upsetsthe ink level
detection andmay eventually cause a serious problem in the print head.
o
Paper Out
When the printer fails to load a sheet, it goes into a paper out error.
o
Paper Jam
When the printer fails to eject a sheet, it goes into a paper jam error.
o
No Ink-Cartridge
When the printer detects that ink-cartridge comes off, or failed to read or write
CSIC data, it goes into this errorm ode.
o
Maintenance Request
When thetotal amount of inkwasted through cleaningsand flushing reachesto the
limit, printer indicates this error and stops. In such a case, the absorberin the
printer enclosureneeds to be replaced with new one by service personnel.
o
Fatal Errors
Carriage control error.
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION PAPER 24
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
2
(17Ib.) - 90g/m2(24Ib.)
[Quality]
Exclusivepaper, 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.
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 availablec apacity]
1sheets
Note: Transparency printing is available only at normal temperature.
1.5.2.3 Envelope
[Size]
No.10: Width 241m m (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.)
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION PAPER 25
[Quality]
Bond paper, Plain paper, Air mail
Note1: Envelope printingis available only at normal temperature.
Note 2: Keep the longer side of the envelope horizontally at setting.
Note 3: Envelope printing isavailable only in the normal temperature.
Note 4: Nowrinkled, scuffing, tornorfolded paper be used.
Note 5: Nocurled paper more than 5mm be used.
Note 6: No paper with glue on flap be used.
Note 7: No double envelops nor withwindowenvelops 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
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION PAPER 26
1.5.3 Printing Area
1.5.3.1 Cut Sheet
See the figure below and tables on the right for printable areas.
Figure 1-6. Printable Area for Cut Sheet
* Bottom margin can be reduced to 3mm when paper dimensionis
defined by using command, otherwise itis not reduced (14mm). As for
an area between 3mm and 14mm margin, printing quality may decline.
** Referto 1.5.2 Paper Specification for PW (paper width) and PL
(paper length).
Printable Area
LM
RM
PW
TM
BM
PL
Table 1-13. Printing Area
Paper Size
Left Margin
(min.)
Right Margin
(min.)
Top Margin
(min.)
Bottom Margin
(min.)
A4 3 mm (0.12”) 3 mm(0.12”) 3 mm (0.12”)
14 mm (0.54”)/ 3mm
(0.12”) *
Letter 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”)
14 mm (0.54”)/ 3mm
(0.12”) *
B5 3mm (0.12”) 3 mm (0.12”) 3 mm (0.12”)
14 mm (0.54”)/ 3mm
(0.12”) *
Legal 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”)
14 mm (0.54”)/ 3mm
(0.12”) *
Statement 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”)
14 mm (0.54”)/ 3mm
(0.12”) *
Exclusive 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”)
14 mm (0.54”)/ 3mm
(0.12”) *
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION PAPER 27
1.5.3.2 Envelopes
Figure 1-7. Printable Area for Envelopes
Table 1-14. Envelope Margin
Size
Left Margin
(min.)
Right Margin
(min.)
Top Margin
(min.)
Bottom Margin
(min.)
#10 3 mm (0.12”) 28 mm (1.10”) 3 mm (0.12”) 14 mm (0.55”)
DL 3 mm (0.12”) 7 mm(0.28”) 3 mm (0.12”) 14mm (0.55”)
C6 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”) 14 mm (0.55”)
Printable Area
LM
RM
TM
BM
EPSON Stylus COLOR 680/777/777i Revision B
PRODUCT DESCRIPTION INK CARTRIDGE 28
1.6 INK CARTRIDGE
1.6.1 Black Ink Cartridge
Type: ExclusiveCa rtridge
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
o
Cto40oC (within a month at 40oC)
Packing: -30
o
Cto40oC (within a month at 40oC)
Transit: -30
o
Cto60oC (within 120 hours at 60oC
and within a month at 40
o
C)
Dimension: 28.1 mm (W) x 66.85 mm (D) x 43.3 mm (H)
Figure 1-8. Black Ink Cartridge
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
o
Cto40oC (within a month at 40oC)
Packing: -30
o
Cto40oC (within a month at 40oC)
Transit: -30
o
Cto60oC (within 120 hours at 60oC
and within a month at 40
o
C)
Dimension: 43.2 mm (W) x 66.85 mm (D) x 43.3 mm (H)
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 contains life-expired ink.
Note 3: Ink will be frozen under -4
o
C environment; however,it will be
usable after being leftat room temperature for more than three
hours.
CHAPTER
2
OPERATINGPRINCIPLES
EPSON Stylus COLOR 680/777/77i Revision B
Operating Principles
O
verview 30
2.1 Overview
This section describes the operating principlesof the printer mechanism and electrical
circuit boards.T he Stylus COLOR 680/777/777i has the following boards:
o
Main board: C383 MAIN (C383 MAIN-B)
NOTE: C383 MAIN-B is compatible with C383 MAIN. Onlys ome chips or parts
are differentfrom each other due to different producers.
o
Power supply board: C383 PSB/PSE
o
Panel board: C383 PNL
2.1.1 Printer Mechanism
The printer mechanismfor S tylus COLOR 680/777/777i is designed newly.But,the
basic component of the printermechanism 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 EPSON ink jet printers,theStylus COLOR 680/777/777i is equipped with
two stepping motors; one for ASF, Paper feeding/Pumpm echanism, and one for CR
mechanism.ASF unit uses rear entryfront eject system. ThisAS F unit is also designed
newly and single LD roller loadsthe paper to the printer mechanism.
For capassembly, StylusCOLOR 680/777/777iuses valveless mechanism;new design
for this model.
Figure 2-1. Printer Mechanism b lock diagram
ASF Hopper Spring
CR Motor
Paper feed back plate
Paperseparationpad
Clutch mechanism
CR unit
PF Roller
HP/PE/IC Sensor sensor
LD Roller
Pump Assembly
Paper EjectRoller
Star Wheel Roller
CR Timing belt
CR lock lever
PF Motor
Cap Assembly
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