File name Cover.pdfService
DVD-W
Manual
Product Features
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The exterior design and some parts of the product may be changed without prior notification.
Contents
Chapter 1 Safety Precautions Chapter 2 General Specifications and Features Chapter 3 Functional Description and Installation Chapter 4 Disassembly and Assembly Chapter 5 Troubleshooting Chapter 6 Block Diagram Chapter 7 Schematic Drawings
1. Safety Precautions
1-1. Safety Precautions for Repairs
1) Since the equipment uses laser diode, ensure that eyes and parts of the body do not come near the laser diode while performing repair service. 2) Do not disassemble pickup to repair. If the laser diode is faulty, then replace the complete pickup assembly. 3) Perform repair services away from electrical equipments such as TV to avoid interference from these equipments. 4) Ensure to unplug the power cord from the unit before replacing any parts. 5) Ensure to insert the disc properly into the unit before use. 6) Since this equipment cannot be used as a standalone unit, it must be installed in a PC (586 or higher) with appropriate device driver from the floppy disk to verify proper operation. 7) This equipment has many parts with properties related to safety. These parts are specifically noted in the parts list and schematic drawings. Ensure to replace these parts with new parts that have the same specifications. - Since the laser diode in the optical pickup bundle can be easily damaged by the static electricity in human body or clothing, use the following grounding guidelines when handling the bundle. Wear a wrist strap with one end properly grounded. The wrist strap discharges the static electricity in human body. Work on a conductive material such as copper plate that is properly grounded. Since the static electricity stored in clothing is not easily discharged, ensure that clothing does not make a contact with the pickup bundle.
1-2. Safety Precautions for Installations
A certain semiconductor components are highly susceptible to damages caused by electrostatic discharge (ESD). Semiconductors components such integrated circuits, field effect transistors, and other semiconductor devices are examples of devices that are highly sensitive to ESD. Use the following guidelines to reduce the damages caused by the ESD. 1) Before handling any semiconductor components or parts that contains semiconductors, immediately discharge all static electricity in the body by making a contact with a grounded metallic object. A commercially available wrist strap may also be used. The static electricity must be discharged to avoid potential impact on the voltage during testing. 2) After removing ESD-sensitive components or parts, place the items on a conductive surface such as on a piece of aluminium to prevent accumulation of charges and exposure to ESD. 3) Use properly grounded soldering iron to solder or to de-solder ESD-sensitive components. 4) Only use anti-static soldering iron to de-solder ESD-sensitive components. Use o |