Epson Stylus Photo 925 - Operating Principles

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CHAPTER

OPERATING PRINCIPLES

Main Page

Service Manual1
About this Manual4
Manual Configuration4
Symbols Used in this Manual4
Table of Contents6
Product Description11
Features12
Specifications13
Physical Specification13
Printing Specifications13
Paper Feeding13
General Specifications for Cutter Mechanism13
Input Data Buffer13
Electric Specification14
Environmental Condition14
Reliability15
Safety Approvals15
Acoustic Noise15
Built-In Card Slots16
Card Slot Standards16
Supported Memory Card16
Supported Voltage16
Multiple Slots Operation16
Priority16
Exclusive Access Control against External Storage Device Connecting Port16
Compatibility17
Specifications for Devices Available17
Current Supply17
External Storage Device Connecting Port17
Standalone Printing Function18
File Sort Rule18
File System18
Media Format18
File Format18
Valid Image Sizes18
Maximum Number of Photo Data Files18
Thumbnail Image Data18
File Sorting18
Date Range19
Date Data Capture Rule19
Icons20
Control Panel20
Switches20
Leds21
Error/Warning Display (LCD)21
Warning22
Warning Display at Initial Ink Charge22
Power Button22
Button Functions22
Up/Down Arrow Buttons23
Back Button23
Select Button23
Maintenance Button23
Cancel Button23
Print Button23
Roll Paper Button23
Custom Buttons 1 and 224
Initial Setting Values24
Cut Sheet25
Paper25
Envelope25
Paper Handling25
Paper Specification25
Cut Sheet26
Envelopes26
Printing Area26
Operating Principles27
Overview28
Printer Mechanism28
Print Head29
Printing Process30
Printing Method31
Carriage Motor (CR Motor)31
Carriage Mechanism31
Carriage Home Position Detection32
Platen Gap Adjustment Mechanism & Parallelism Adjustment Mechanism32
Paper Feeding Mechanism33
Paper Feed Motor (PF Motor)33
PF Motor Drive Transmission Path33
Cutter Motor34
Cutter Mechanism34
Paper Loading Mechanism35
Epson Stylus Photo37
Pump Unit & Wiper Mechanism38
Ink System Mechanism38
Capping Mechanism39
Cap Unit39
Electrical Circuit Operating Principles40
C408 PSB/PSE Board40
C475 MAIN Board42
Main Elements43
Motor Driver Circuit44
Asf/Pump Motor Drive Circuit47
Cutter Motor Drive Circuit47
Sensor Circuit48
Troubleshooting50
Overview51
Troubleshooting with LED Error Indications and EPSON Status Monitor 3 Messages52
Unit Level Troubleshooting58
Disassembly and Assembly58
Disassembly and Assembly73
Overview74
Precautions74
Tools76
Work Completion Check77
Disassembly78
Housing Removal79
Panel Unit Removal81
Housing Lower Cover Left Rear and Front Removal82
Housing Lower Covers Removal82
Housing Lower Cover Right Rear and Front Removal83
Print Head Removal85
CR Unit Removal87
CR Encoder Board Removal90
LD Roller Removal91
PE Sensor Removal94
ASF Unit Removal95
Waste Drain Ink Pad Unit Removal98
CR Motor Removal99
ASF Motor Removal100
Cutter Unit Removal100
Circuit Board Unit Removal102
Ink System Unit Removal105
PF Motor Removal108
Paper Eject Roller Removal110
PF Roller Removal112
PF Scale Installation115
Adjustment118
Outline119
Conditions for Adjustments119
Adjustment120
Parallel Adjustor120
Adjustment Program122
Outline122
Starting up the Adjustment Program122
EEPROM Initialization123
Head ID124
CR Motor Drive Dispersion125
Bi-D Adjustment126
USB ID Input128
First Dot Position Adjustment129
Cut Position Adjustment129
Memory Card Drive Confirmation130
Head Cleaning131
Initial Ink Charge131
Refurbishment for DOA132
The Number of the Cutting Operation133
Protection Counter133
EEPROM Backup Data134
A4 Normal Paper Printing135
EEPROM Data136
Maintenance Overview138
ROM Replacement138
Cleaning138
Service Maintenance139
Appendix146
Connector Summary147
Major Component Unit147
ASP List148
Exploded Diagrams151
Electrical Circuits163

Epson Stylus Photo 925 - Operating Principles

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