Canon LBP-860, Service Manual

Page: 147 / 219

A. Initial Check
1. Operating environment
Check that:
b.
d.
e.
2.
The line voltage does vary more
than 10% from the voltage shown on
the rating plate.
The printer is installed on the level.
The room temperature is kept between
and and the relative
humidity, between 20 and 80%.
The printer is not exposed to ammonia
gas and is not located anywhere hot or
humid (for instance, near a water
faucet, boiler, or humidifier). near open
flames, or anywhere dusty.
The printer is not exposed to direct
sunlight. If it has to be put somewhere
sunny. the window should be curtained.
The room is well ventilated.
paper
Check that:
a. The recommended paper is being used.
If the paper is loo thick or too thin, or
lends to curl. paper jams or transfer
problems may occur. or prints may be
blurred.
b. The paper is not damp. Use new print
paper and check whether the print
quality improves.
3.
Consumables
The message TONER LOW” appears on
the Status indication display when an EP
E cartridge is installed in the printer. If the
message appears, the amount of toner is
insufficient; prepare a new cartridge. If blank
spots appear on prints, the toner is
unevenly distributed in the cartridge. Take
the cartridge out and slowly rock it from
side to side to distribute the toner evenly
as described in Section 111 of Chapter 4.
4. Other points
During winter, if the printer is brought into
a warm room from a cold one [for instance,
a warehouse), condensation will occur
inside the printer, causing various
problems.
For example:
Condensation on optical surfaces (such
as the scanning mirror and lenses] till
make the print image light.
If the photosensitive drum is stored in
a cold area, its electrical resistance
be high, making it impossible to obtain
correct print contrast.
condensation occurs, w i p e t h e
assemblies or parts with a dry cloth, or
leave the printer ON for 10 to 20 minutes.
If an EP-E cartridge is unsealed shortly
after being brought into a warm room from
a cold one. condensation will also occur
inside the
this may cause image
defects.
Be sure to inform the customer they
must let the EP-E cartridge adjust to room
temperature before unsealing This will
take an hour or two.
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