Canon iR1200 Series, Service Manual

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Chapter 13
13-1
13.1 Making lnitial Checks
13.1.1 Outline
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A fault that can occur in the machine may be one of the following three: an image fault, a malfunction, a feeding fault.
If a fault occurs, make initial checks first; then, isolate the problem according to the troubleshooting flow chart, and
take appropriate action with the following in mind:
13.1.2
Making Initial Checks
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1. If you are using a specific terminal of a connector to measure voltage, be sure to check that the connector is not
suffering from poor contact.
2. If you are handling a PCB or the contact sensor, be sure to touch a metal portion of the machine before starting the
work to avoid static damage.
3. The machine's laser scanner unit cannot be adjusted in the field. Do not disassemble it.
13.1.3 Site Environment
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a. The power source must provide the rated voltage -/+ 10%.
b. The site must be free of high temperature/humidity (not near a water faucet, water boiler, humidifier), and must
not be in a cold place, near a source of fire, or subject to dust.
c. The site must be free of ammonium gas.
d. The site must be free of direct rays of the sun; otherwise, it must be provided with curtains.
e. The site must be well ventilated.
f. The machine must be level.
g. If the machine is equipped with fax functions, it must remain powered day and night.
13.1.4 Checking the Drum Unit
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If the surface of the photosensitive drum has scratches, replace the drum unit.
13.1.5
Checking the Paper
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a. Is the paper of a recommended type?
b. Is the paper moist? Try fresh paper out of package.
13.1.6 Others
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When a machine is brought from a cold to warm place, its inside can start to develop condensation, leading to various