Manuals / Brands / Computer Equipment / Printer / Epson / Computer Equipment / Printer

Epson 440 1.3.2.1 Prevention Hosts from Data Transfer time-out

1 160

Download 160 pages, 2.58 Mb

Chapter 1 Product Description

Rev. A 1-1

9

[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

Note) *: 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 or exceeding 3.0V when the printer is

powered on. The receiver shall provide an impedance equivalent to

7.5K ohm to ground.

[Data Transmission Timing for Reverse Channel]

The figure below shows timing chart of Parallel Interface Reverse channel.

1.3.2.1 Prevention Hosts from Data Transfer time-out

Generally, hosts abandon data transfer to peripherals when a peripheral is in the busy state for dozens of

seconds continuously. To prevent hosts this kind of time-out, the printer receives data very slowly,

several bytes per minute, even if the printer is in busy state. This showdown is started when the rest of

the input buffer becomes several hundreds of bytes. Finally, the printer is in the busy state continuously

when the input buffer is full.

Table 1-16. Signal Level

Virtual Busy Status Virtual Busy Status

Figure 1-10. Parallel Interface Timing Chart(Reverse Channel)

Contents

Main NOTICE PRECAUTIONS WARNING CAUTION WARNING CAUTION PREFACE Page Page Chapter 1 Product Descriptions 1.1 Features 1.2 Specifications 1.2.1 Printing Specification Page Note) *1: Each typeface has four different font style; Normal, Bold, Italic and Bold-Italic. 1.2.2 Paper Specification 1.2.2.1 Cut Sheet 1.2.2.2 Transparency Film / Glossy Paper 1.2.2.3 Envelope 1.2.2.4 Index Card 1.2.3 Adjust Lever Settings (PG adjust lever) Rev. A 1- 1.2.4 Printable Area 1.2.4.1 Cut Sheet 1.2.4.2 Envelope 1.2.5 Environmental Condition 1.2.6 Ink Cartridge Specifications 1.2.6.1 Black Ink Cartridge Rev. A 1-11 1.2.6.2 Color Ink Cartridge Note) 1.2.7 Physical Specification 1.2.8 Electric Specification 1.2.9 Reliability 1.2.10 Safety Approvals 1.2.11 Acoustic Noise 1.2.12 CE Marking 1.2.13 Printer Language and Emulation Page 1.3 Interface 1.3.1 Parallel Interface (Forward Channel) Note) I/O refers to the direction of signal flow from the printers point of view. 1.3.2 Parallel Interface (Reverse Channel) Note) The printer sends following device ID string when it is requested. Note) I/O refers to the direction of signal flow from the printers point of view. Note) *: Rise and fall time of every output signals. **: Rise and fall time of every input signals. 1.3.2.1 Prevention Hosts from Data Transfer time-out 1.3.3 Serial Interface Rev. A 1-21 1.4 Control Panel 1.4.1 Indicators 1.4.2 Panel Functions 1.4.3 Printer Condition and Panel Status 1.5 Error Status 1.5.1 Ink Out Never use the ink cartridge once taken out from the printer. 1.5.2 Paper Out 1.5.3 Paper Jam 1.5.4 No Ink-Cartridge Error 1.5.5 Maintenance Request 1.5.6 Fatal Errors 1.6 Printer Initialization 1.6.1 Initialization Settings Rev. A 1-2 1.7 Main Components 1.7.1 Printer Mechanism 1.7.2 C200 MAIN Board Figure 1-13. Exterior view of C200 Main Board Rev. A 1-2 1.7.3 C206 PSB/PSE Board 1.7.4 C206 PNL Board Chapter 2 Operating Principles 2-17 2.1 OVERVIEW 2.1.1 Printer Mechanism 2.1.1.1 Printing Mechanism Page 2.1.1.1.2 Printing Method Note1: Note1) Note3: Note2: Nozzle No.#9 Nozzle No.#4 Particular line(Completed line) 360-dpi Condition: 360-dpi printing Nozzle: Total 10 nozzle/each color #1 #2 #3 #4 #5 #6 Page Rev. A 2- 2.1.1.2 Carriage Mechanism Rotor *Note 1): B A /A /B C200 MAIN Board Connecter CN6(CN7) Page Rev. A 2- 2.1.1.2.1 Platen Gap Adjust Mechanism and Parallel adjustment Mechanism Rev. A 2-11 2.1.1.3 Paper Feed Mechanism and Pump Mechanism Page Page 2.1.1.4 Ink System 2.1.1.4.1 Pump, Carriage Lock, Head Cleaner Mechanism CW Rotation CCW Rotation Tube pressured Tube released 2.1.1.4.2 Cap Mechanism AB 2.2 Electrical Circuit Operating Principles 2.2.1 C206 PSB/PSE Power Board AC100V Rev. A 2-21 2.2.2 C200 Main Board Page Rev. A 2-2 2.2.2.1 Reset Circuits 2.2.2.2 Sensor Circuits E05B43 (IC2) TMP95C061 (IC1) 2.2.2.3 EEPROM Control Circuits +5V 2.2.2.4 Timer Circuit 2.2.2.5 DRAM Control Rev. A 2-2 2.2.2.6 Print Head Control Circuit Page Common Waveform 64-dot 2-3 2.2.2.7 PF(Pump) Motor Drive Circuit Rev. A 2-31 2.2.2.8 CR Motor Drive Circuit Chapter 3 Disassembly and Assembly 3.1 OVERVIEW 3.1.1 Precautions for Disassembling the Printer WARNING 3- 3.1.2 Specification for Screws 3.1.3 Tools Chapter 3 Disassembly and Assembly Rev. A 3- 3.1.4 Work Completion Check 3- 3.2 DISASSEMBLY AND ASSEMBLY Figure 3-1. Disassembly Flow This section describes the step-by-step disassembly procedures shown in the diagram below. 3.2.1 Housing Removal WORK POINT 3.2.2 Circuit Boards Removal WORK POINT Page 3.2.3 Control Panel Removal 3.2.4 Waste Ink Pad Assembly Removal CAUTION WORK POINT 3.2.5 Disassembling the Printer Mechanism 3.2.5.1 Printhead Removal Page 3.2.5.2 Pump Assembly and Cap Assembly Removal CAUTION OK NG Page 3.2.5.3 CR Motor Assembly Removal WORK POINT Page 3.2.5.4 PF Motor Assembly Removal Page 3.2.5.5 ASF Assembly Removal Page 3.2.5.5.1 ASF Disassembly 3.2.5.5.2 Pick-Up Roller Assembly Removal 3.2.5.6 Carriage Assembly Removal Page 3.2.5.7 PF Roller Assembly Removal Page 3.2.5.8 PE Sensor Assembly Removal 3.2.5.9 HP Sensor Assembly Removal Chapter 4 Adjustment Rev. A 4-1 4.1 OVERVIEW 4.1.1 Required Adjustments CAUTION Performance Order 1 2 3 4 5 Note) : Required adjustment NA: Not applicable 4.2 Adjustments 4.2.1 Paper Gap Adjustment Figure 4-1. Paper Gap Adjustment - Thickness Gauge Setting Figure 4-2. Paper Gap Adjustment - Adjustment Procedure Figure 4-3. CLEANER, HEAD Overlap 4- 4.2.2 Adjustment using Adjustment Program 4.2.2.1 Overview of Adjustment Program 4.2.2.2 Ink Charge Operation CAUTION 4- 4.2.2.3 VH Setting Timing to write the specified value to EEPROM: Upon pressing ENTER key after ID code input. Head VH ID Viewed from front Page 4.2.2.4 Head Angular Adjustment Page Rev. A 4-11 4.2.2.5 Bi-D Alignment Adjustment Timing to write the specified value to EEPROM: Upon pressing ENTER key after input Y. 4-1 Chapter 5 Troubleshooting 5.1 Troubleshooting Page 5.2 Unit Level Troubleshooting 5.2.1 Printer does not operate at power on Is AC power voltage normal? Figure 5-2. Flow Chart 1 board opened? Is the fuse opend again? 5.2.2 Error is detected 5.2.3 Failure occurs during printing Figure 5-4. Flow Chart 3 5.2.4 Printer does not feed the paper correctly Figure 5-5. Flow Chart 4 5.2.5 Control panel operation is abnormal 5.3 Unit Repair C206 PSB/PSE Board Page 5-11 5.3.1 Unit Repair - C200 Main Board 5-1 5.4 Repair of the Printer Mechanism 5-1 Page Page Chapter 6 Maintenance Rev. A 6-1 6.1 OVERVIEW 6.1.1 Cleaning 6.1.2 Service Maintenance 6- 6.1.3 Lubrication Chapter 6 Maintenance Rev. A 6- No.12 *Never apply the oil exceeding 0.6cc. Page No.6 No.7 Page Appendix Rev.A A-1 A.1 Connector Summary A-2 A.2 Connector Summary Rev.A A-3 A-4 A.3 EEPROM Address Map Rev.A A-5 A-6 Rev.A A-7 Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page MMAAIINN BBRRDD OPERATOR PANEL PPRROOMM PH LOCK TAB PMPAS WASTE PAD EPSON OVERSEAS MARKETING LOCATIONS