Canon FAX L1000, Руководство по обслуживанию

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FAX-L1000 Chapter 1: Safety and Precautions
2.3 Precautions when Servicing
2.3.1 Damage due to electrostatic discharge
This fax contains contact sensor and printed circuit boards that use many electrical
components such as ROM, RAM and custom ICs. A static charge can damage these
components, so, care must be taken to prevent damage caused by electrostatic discharge when
disassembling the fax.
Static electricity
Electrostatic discharge damages electronic components and alters their electrical
characteristics. Even plastic tools and hands without grounding wrist straps will
generate enough static electricity to damage electronic components.
The following equipment is needed to prevent electrostatic discharge damage:
• An earthed conductive mat
• Grounding wrist straps
• Alligator clip cable for earthing metal parts on the fax
Carry out the following countermeasures if the above equipment is not available, (for
example, during on-site servicing):
• Use an anti-static bag for storing or carrying printed circuit boards or electronic devices.
• Avoid wearing silk or polyester clothing, or leather-soled shoes. Wear cotton clothing and
rubber-soled shoes.
• Avoid servicing the fax in carpeted rooms.
• Before starting servicing, touch grounded earth terminals to discharge any static electricity
charges.
• Wear grounding wrist straps, and earth metal parts on the machine.
• Handle printed circuit boards and electronic devices by their edges and packages. Do not
directly touch terminals of electronic devices with your fingers.
Electric shock when carrying out work with the fax turned on
When you must service the fax with the power cord plugged in, you must not
ground your body with grounding wrist straps. This is to prevent electricity
passing to your body and causing electric shock.