This Epson Stylus Photo 1390 Service Manual describes basic functions, theory of electrical and mechanical operations, maintenance, and repair procedures of the printer. 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. This manual consists of six chapters and Appendix. Chapter 1. Product Descriptions, provides a general overview and specifications of the product. Chapter 2. Operating Principles, describes the theory of electrical and mechanical operations of the product. Chapter 3. Troubleshooting, describes the step-by-step procedures for the troubleshooting. Chapter 4. Disassembly and Assembly, describes the step-by-step procedures for disassembling and assembling the product. Chapter 5. Adjustment, provides Epson-approved methods for adjustment. Chapter 6. Maintenance, provides preventive maintenance procedures and the list of Epsonapproved lubricants and adhesives required for servicing the product. Appendix, provides the following additional information for reference: connector summary, electric circuit diagrams.
Symbols Used in this Epson Stylus Photo 1390 Service Manual Various symbols are used throughout this manual either to provide additional information on a specific topic or to warn of possible danger present during a procedure or an action. Be aware of all symbols when they are used, and always read Note, Caution: Indicates an operating or maintenance procedure, practice, or condition that, if not strictly observed, could result in damage to, or destruction of, equipment. or Warning:: Indicates an operating or maintenance procedure, practice or condition that, if not strictly observed, could result in injury or loss of life. messages. Adjustment required: Indicates an operating or maintenance procedure, practice or condition that is necessary to keep the product’s quality. Check Point: May indicate an operating or maintenance procedure, practice or condition that is necessary to accomplish a task efficiently. It may also provide additional information that is related to a specific subject, or comment on the results achieved through a previous action.
The Carriage mechanism consists of parts/units such as the Carriage Motor (CR Motor), Carriage Shafts, Platen Gap Adjustment Mechanism and Carriage Lock Mechanism. Closed loop control based on the CR Motor (DC Motor) and CR Encoder Sensor has advantages in stabilized print quality and silent operation. Heat Generation Control The printer has a mechanism to reduce the variations in the torque constant and coil resistance of the DC motors, and variations in output voltage of the Power Supply Board to obtain a designated heating value. CR Variation Measurement Sequence The variations mentioned above are measured in a CR variation measurement sequence when the CR mechanical load is in the initial status and saved into the EEPROM. According to the saved information, the printer controls the drive voltage to obtain a designated driving current. This minimizes the unit-to-unit variation. CR Measurement Sequence To set the appropriate drive current value according to the CR mechanical load, the mechanical load is measured in a CR measurement sequence and saved into the EEPROM at power-on or after replacing the Ink Cartridge(s). The above control and sequences correct the drive current value of the CR Motor according to not only the mechanical load but also the variations of the motors. In addition, the resultant CR drive current value is used to calculate a heating value, and when the specified heating value is reached, wait time is provided per CR path for printing.
Download Epson Stylus Photo 1390 Service Manual here
0 Response to "Epson Stylus Photo 1390 Service Manual"
Post a Comment