This Epson Stylus Photo 1290 Service Manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of Epson Stylus Photo 1290. 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. 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, provides the step-by-step procedures for troubleshooting. Chapter 4. Disassembly and Assembly, describes the step-by-step procedures for disassembling and assembling the product. Chapter 5. Adjustments, provides Epson-approved methods for adjustment. Chapter 6. Maintenance, 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: EEPROM Address Map, onnector pin assignments, component layout, exploded diagrams, electrical board circuit diagrams.
Symbols Used in this Epson Stylus Photo 1290 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.
Generally, hosts abandon data transfer to peripherals when the peripheral is in the busy state for dozens of seconds continuously. To prevent this kind of time-out, the printer receives data very slowly, several bytes per minute, even if the printer is in the busy state. The slowdown starts when the remaining input buffer becomes several hundreds of bytes, and the printer finally gets into the busy state continuously when the input buffer is full. USB and IEEE1284.4 on the parallel interface do not require such function. The printer has two built-in interfaces: the USB and parallel interface. These interfaces are selected automatically. Automatic Selection In this automatic interface selection mode, the printer is initialized to the idle state while scanning which interface receives data when it is powered on. Then the interface which received data first is selected. When the host stops data transfer and the printer is in the stand-by state for seconds, the printer is returned to the idle state. As long as the host sends data or the printer interface is in the busy state, the selected interface is let as it is. Interface State and Interface Selection When the parallel interface is not selected, the interface gets into the busy state. When the printer is initialized or returned to the idle state, the parallel interface gets into the ready state. Note that the interrupt signal such as the -INIT signal on the parallel interface is not effective while that interface is not selected.
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