Canon iR7086, Service Manual

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Chapter 15
15-1
15.1 Making lnitial Checks
15.1.1 Checking the Side of Installation
0010-9364
iR7105 / iR7095 / iR7086
Check the site of installation against the following requirements:
a. The voltage of the power supply must be as rated (-/+ 10%). The power plug must remain connected day and night.
b. The site must not be subject to high temperature/humidity (near a water faucet, water boiler, humidifier). The machine must not be installed in a cold place or in
an area near a source of fire or subject to dust.
c. The site must not be subject to ammonium gas.
d. The site must not be subject to direct rays of the sun. As necessary, curtains must be provided.
e. The site must be well ventilated.
f. The machine must be kept level.
g. The machine must remain powered throughout the night.
15.1.2 Checking the Originals
0010-9365
iR7105 / iR7095 / iR7086
Check the originals to find out whether the problem is caused by the originals used or is in the machine:
a. The copy density setting is optimum at 5 -/+ 1.
b. If the original has a reddish background, copies can suffer poor contrast.
MEMO:
Red sheets, slips, and the like.
c. The density of the original can have the following effects:
MEMO:
if the original is a diazo copy or is rather transparent, copies can be mistaken as being "foggy."
if the original is prepared in pencil, copies can be mistaken as being "too light."
15.1.3 Checking the Copyboard Cover, Copyboard Glass, and Standard White Plate
0010-9367
iR7105 / iR7095 / iR7086
Check the copyboard cover, copyboard glass, and standard white plate for dirt or scratches. If dirt is found, clean it with a solution of mild detergent or alcohol; if
a scratch is found, on the other hand, replace it.
15.1.4 Checking the Charging Assemblies
0010-9368
iR7105 / iR7095 / iR7086
a. Check the charging assemblies for dirt and a faulty charging wire.
b. Clean the charging wire and the shielding plate of the charging assemblies. (If dirt cannot be removed, replace it.)
c. Check the type and height of the charging wire.
d. Check to make sure that the changing assemblies are firmly fitted.
e. Check the charging wire spring for rusting.
f. Check the charging wire cleaning pad (of each charging assembly) for displacement.
15.1.5 Cheiking the Develop Unit
0010-9369
iR7105 / iR7095 / iR7086
a. Check to make sure that the rolls on both ends of the developing assembly are in contact with the drum.
b. Check to make user that the surface of the developing cylinder is coated with an even layer of toner.
c. Check the connectors between the developing assembly and the machine for connection.
d. Check to make sure that <DEV-SLOW> of the following in service mode in '2': COPIER > OPTION > BODY.
15.1.6 Checking the Paper
0010-9370
iR7105 / iR7095 / iR7086
a. Check to see if the paper is a type recommended by Canon.
b. Check to see if the paper is moist. Try paper fresh out of package.
15.1.7 Checking the Periodically Replaced Parts
0010-9371
iR7105 / iR7095 / iR7086
Check with the Periodical Servicing Chart and the Periodically Replaced Parts Table, and replace those parts that have reached the end of their lives.
15.1.8 Others
0010-9372
iR7105 / iR7095 / iR7086
In winter, bringing a machine from a cold to warm place can cause the inside of the machine to develop condensation, leading to various problems.
MEMO:
a. Condensation in the scanning system (glass, mirrors, lenses) will produce darker images.
b. Condensation in the charging system will cause electrical leakage.
c. Condensation on the pickup/feeding guide will cause feeding faults.
If condensation is found, dry wipe the part or leave the machine alone and powered for 60 min.
If the density is uneven (different between front and rear) or the image is too light or is foggy, perform the "Image Adjustment Basic Procedure" in advance.