Table Of Contents - Epson Stylus PHOTO 890 Service Manual

Chapter 1 PRODUCT DESCRIPTIONS
1.1 Overview ............................................................................................................ 11
1.1.1 Features ...................................................................................................... 11
1.1.2 Accessories, Consumable Products, and Options ...................................... 12
1.2 Basic Specifications .......................................................................................... 14
1.2.1 Printing Specification ................................................................................ 14
1.2.2 Control Code .............................................................................................. 14
1.2.3 Paper Feeding ............................................................................................ 14
1.2.4 Input Data Buffer ....................................................................................... 14
1.2.5 Paper Specifications ................................................................................... 15
1.2.5.1 EPSON Special Media ...................................................................... 15
1.2.6 Printing Area .............................................................................................. 17
1.2.6.1 Cut Sheet ........................................................................................... 17
1.2.6.2 Envelopes .......................................................................................... 18
1.2.7 Adjust Lever .............................................................................................. 18
1.2.8 Ink Cartridge .............................................................................................. 19
1.2.9 Electric Specification ................................................................................. 20
1.2.10 Reliability ................................................................................................ 20
1.2.11 Environmental Condition ......................................................................... 21
1.3 Interface ............................................................................................................. 22
1.3.1 Parallel Interface (Forward Channel) ........................................................ 22
1.3.2 Parallel Interface (Reserve Channel) ......................................................... 25
1.3.3 USB Interface ............................................................................................ 26
1.3.4 Prevention of Data Transfer Time-out ....................................................... 27
1.3.5 Interface Selection ..................................................................................... 27
1.3.6 IEEE1284.4 Protocol ................................................................................. 27
1.4 Operations ......................................................................................................... 28
1.4.1 Buttons ....................................................................................................... 28
1.4.2 Indicators ................................................................................................... 28
1.4.3 Panel Functions .......................................................................................... 28
1.4.4 Special Setting Mode ................................................................................. 29
1.4.5 Printer Initialization ................................................................................... 30
1.4.6 Initialization Value .................................................................................... 30
1.5 Dimension .......................................................................................................... 31

Table of Contents

Chapter 2 OPERATING PRINCIPLES
2.1 Overview ............................................................................................................ 34
2.1.1 Printhead Mechanism ................................................................................ 35
2.1.2 Carriage Mechanism .................................................................................. 36
2.1.2.1 Carriage Motor (CR Motor) .............................................................. 36
2.1.2.2 Platen Gap (PG) /Parallelism Adjustment Mechanism ..................... 37
2.1.2.3 Carriage Home Position (HP) Detection ........................................... 37
2.1.3 Paper Feeding Mechanism ......................................................................... 37
2.1.3.1 CR Lock Mechanism ......................................................................... 39
2.1.4 Paper Loading Mechanism ........................................................................ 40
2.1.4.1 Drive Transmission to the ASF Unit ................................................. 40
2.1.4.2 Paper Loading Operation .................................................................. 41
2.1.4.3 Pump Mechanism .............................................................................. 42
2.1.4.4 Capping Mechanism .......................................................................... 43
2.2 Electrical Circuit Operating Principles .......................................................... 44
2.2.1 C378PSB/PSE Board ................................................................................. 44
2.2.1.1 Electrical Circuit ............................................................................... 44
2.2.1.2 Protection Circuits ............................................................................. 46
2.2.1.3 Power Supply Control Function ........................................................ 46
2.2.1.4 Energy Save Mode ............................................................................ 46
2.2.2 C393MAIN Board Circuit Operation Principles ....................................... 47
2.2.2.1 Printhead Driver Circuit .................................................................... 50
2.2.2.2 RTC (Real Time Clock)/ Reset/ EEPROM Circuit ........................... 51
2.2.2.3 Motor Driver Circuit ......................................................................... 52
2.2.2.4 ASF/Pump Motor Driver Circuit ....................................................... 57
2.2.2.5 Sensor Circuit .................................................................................... 58
Chapter 3 TROUBLESHOOTING
3.1 Overview ............................................................................................................ 61
3.1.1 Self-Diagnostic Function ........................................................................... 62
3.1.1.1 Troubleshooting with LED Error Indicators ..................................... 62
3.1.1.2 Error Conditions ................................................................................ 62
3.1.1.3 Remedies for Paper Out Error ........................................................... 65