Epson 950 service manual Contents

CONTENTS

Chapter 1 PRODUCT DESCRIPTION
1.1 Overview	9
1.2 Specification	11
1.2.1 Printing specification	11
1.2.2 Character specification	12
1.2.3 Control code	12
1.2.4 Paper feeding	12
1.2.5 Paper specification	13
1.2.6 Printing area	14
1.2.7 Adjust Lever	15
1.2.8 Ink	15
1.2.9 Input data buffer	16
1.2.10 Electrical specification	16
1.2.11 Acoustic noise	17
1.2.12 CE Marking	17
1.2.13 Safety Approvals	17
1.2.14 Reliability	17
1.2.15 Environmental condition	17
1.3 Printer Function	19
1.3.1 Operator controls	19
1.3.2 Operate switch	19
1.3.3 Indicators	19
1.3.4 Panel Functions	19
1.3.5 Special settings mode (*1)	20
1.3.6 Printer condition and Panel status	21
1.3.7 Printer Initialization	22
1.3.8 Default Values	23
1.3.9 Errors	23
1.4 Physical specification	24

Chapter 2 OPERATING PRINCIPLES
2.1	Overview	26
2.2	Printer Mechanism	26
	2.2.1 Printhead	27
	2.2.2 Carriage Mechanism	28
	2.2.3 Paper Feeding Mechanism	30
	2.2.4 Paper Loading Mechanism (ASF Unit)	34
2.3	Electrical Circuit Operating Principles	43
	2.3.1 Power Supply Circuit Operating Principles	43
	2.3.2 C456 Main Board	46
Chapter 3 TROUBLESHOOTING
3.1	Overview	54
	3.1.1 Communication Error	55
	3.1.2 Too Late Throughput	55
	3.1.3 Status Monitor does not operate	56
	3.1.4 Troubleshooting with LED Error Indications	57
	3.1.5 Isolating the Faulty Part on the Power Supply Board	77
	3.1.6 Isolating the Faulty Part according to the Phenomenon	79
Chapter 4 DISASSEMBLY AND ASSEMBLY
4.1	Overview	92
	4.1.1 Precautions	92
	4.1.2 Tools	93
	4.1.3 Screws	94
	4.1.4 Work Completion Check	95
4.2	Disassembly	96
	4.2.1 Housing Removal	97
	4.2.2 Board Assembly Removal	101
	4.2.3 ASF Unit Removal	105