Epson Stylus Color 640 Service Manual page 4

This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of Stylus Color 440/640/
740. The instructions and procedures included herein are intended for the experienced repair technicians, and attention should be given to the
precautions on the preceding page. The chapters are organized as follows:
CHAPTER 1.
Provides a general overview and specifications of the product.
CHAPTER 2.
Describes the theory of electrical and mechanical operations of the product.
CHAPTER 3.
Provides the step-by-step procedures for troubleshooting.
CHAPTER 4.
Describes the step-by-step procedures for disassembling and assembling the product.
CHAPTER 5.
Provides Epson-approved methods for adjustment.
CHAPTER 6.
Provides preventive maintenance procedures and the lists of Epson-approved lubricants and
adhesives required for servicing the product.
APPENDIX
Provides the following additional information for reference:
• Connector pin assignments
• Electric circuit boards components layout
• Exploded diagram
• Electrical circuit boards schematics
PREFACE
PRODUCT DESCRIPTIONS
OPERATING PRINCIPLES
TROUBLESHOOTING
DISASSEMBLY AND ASSEMBLY
ADJUSTMENTS
MAINTENANCE