Canon MP 700 Service Manual

Contents

Canon MP 700 Service Manual Manual pdf 40 page image

3-2MultiPASS MP730/MP700 Chapter 3: Assembly and Disassembly1.2 General CautionsDamage due to electrostatic dischargeThis machine contains contact sensors and printed circuit boards that use ROMs, RAMs,custom chips and other electronic components that are vulnerable to damage by electrostaticdischarge.Be careful to avoid any damage from electrostatic discharge when conducting service thatrequires disassembly.Static electricity warningElectrostatic discharge can destroy electronic components and alter electricalcharacteristics. Plastic tools and even your hands, if they are not earthed,contain sufficient static electricity to damage electronic components.The following materials may be used as countermeasures against electrostatic discharge:• an earthed, conductive mat,• an earthed wrist-strap,• crocodile clips for the purpose of grounding metallic parts of the main unit.For service conducted on the user’s premises, etc., where such countermeasure materials arenot available, the following countermeasures may be employed.• Use anti-static bags for the storage and carrying of PCBs and electrical elements.• Avoid silk and polyester clothing and leather soled shoes, favouring instead cotton clothesand rubber soled shoes.• Avoid working in a carpeted area.• Before beginning the work, touch the grounded earth terminals of the main unit in order todischarge any static electricity.• Use a wrist-strap and earth the metal parts of the main unit.• PCBs and electrical elements must lifted around the edges and their terminals must not betouched.Caution against electrical shock while working with power onIn cases where service must be carried out with power on, via a connectedpower cable, be sure to wear an anti-static wrist-strap or other earth, in order toprevent an electrical path being created through your body.Application of greaseGrease must not be applied to any parts that are not so designated. If grease comes intocontact with the rubber cap of the purge unit or wire, the BJ cartridge nozzle may becomeblocked and the cartridge rendered unusable. Also, never use any other than the specifiedtype of grease. Otherwise, plastic parts and rubber parts may melt or be otherwise deformed.Attaching and removing cablesAttaching and removing cables with the power still on may cause breakdowns and should beavoided. In particular, flat cables are likely to cause short circuits. When attaching orremoving cables, always be sure to turn the power off.