Repair; Caution When Replacing Service Parts - Canon FAX-B820 Service Manual

3. Repair

3.1 Caution when replacing service parts

3-1-1 Safety Cautions
Electrical shock
Be sure to disconnect the power cable and modular cable to prevent electrical shock.
If working with power on is required, do not use grounding strap. Using such equipment may create conducting
pathway, posing a risk of electrical shock.
See the following for parts and components that may generate electrical shock:
• Power supply unit primary (supplied with AC voltage)
• Telephone line primary
High temperature
In order to prevent burns during disassembly, allow at least ten minutes, after the power
has been switched off, for the high temperature components to cool down.
General high temperature components are as follows.
• Motors
• Power supply unit
• Elements on driver ICs, etc., on PCBs (in particular, ICs with heatsinks)
• BJ cartridge aluminum plate
Fire
It is dangerous to throw lithium batteries and parts and components containing
flammable substances, such as cartridges, etc., into fire.
Such parts and components must be disposed of in accordance with local laws and regulations.
Ignition
When using solvents such as alcohol, etc., while conducting service, there is a danger
of fire igniting from heat from internal circuitry and from sparks.
Before using any such solvents, be sure to switch off the power and allow time for
high temperature parts to cool down. Make sure that there is sufficient ventilation
when working with solvents.
Movable parts
In order to prevent accidents with movable parts, be sure to remove the power cable
when conducting service that requires disassembly. Also, take care that personal accessories
and hair, etc., are not caught in any moving parts.
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