Canon imageRUNNER 5065 series, Service Manual

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Chapter 15
15-1
15.1 Making lnitial Checks
15.1.1 Site Environment
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The site must meet the following requirements:
1) The main source of power must provide the rated voltage. (The power plug must remain connected throughout the night.)
2) The site must not be subject to high temperature/humidity (near a water faucet, water boiler, humidifier) or low temperature. It must not be near a source of fire,
and must not be subject to dust.
3) The site must not be subject to ammonium gas.
4) The site must be free of the direct rays of the sun; otherwise, curtains must be provided to block out the rays.
5) The room must be well ventilated.
6) The floor must keep the machine level.
7) The source of power must provide power night and day.
15.1.2 Checking the Originals for Symptoms
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Try to find out where the problem is caused by the originals or the machine:
1) The copy density is optimum when it is as indicated by the index (5 -/+ 1).
2) An original with a reddish background prevents good contrast; e.g., red slips.
3) Check the original for density:
MEMO:
A diazo copy (used as an original) or an original with transparency tends to produce prints that are likely to be judged "foggy".
An original prepared in pencil tends to produce prints that are likely to be judged "light".
15.1.3 Copyboard Cover, Copyboard Glass, and Standard White Plate
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Check the copyboard cover, copyboard glass, and standard white plate for dirt and scratches. If soiled, clean it with mild detergent or alcohol; if scratched, replace it.
15.1.4 Checking the Charging Assemblies
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1) Check each charging assembly for soiling and each charging wire for a fault (scratch, rust, etc.).
2) Clean the charging wire of each charging assembly and the shielding plate; if the dirt is excessive, replace it.
3) Check the type and the height of each charging assembly.
4) Check to make sure that each charging assembly is correctly mounted.
5) Check the charging wire cleaning pad (of each charging assembly) for displacement.
15.1.5 Checking the Developing Assembly
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1) Check to make sure that the rolls on both ends of the developing assembly are in contact with the drum.
Otherwise, "light images" may occur.
2) Check to make sure that the surface of the developing cylinder is coated with an even layer of toner.
Otherwise, "light images" or "uneven density" may occur.
15.1.6 Checking the Paper
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1) Check to see if the paper is of a recommended type.
Advise the user that the use of paper not of a recommended type may not bring abut the best image quality.
2) Check to find out if the paper is moist.
Try using paper fresh out of package.
Advise the user that the use of moist paper will adversely affect transfer, generating poor images. Advise him/her on the correct method of storing paper.
15.1.7 Checking the Periodically Replaced Parts
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Check with the Scheduled Servicing Chart and the Periodically Replaced Parts Table; if any part has reached the end of its life, replace it.
15.1.8 Image Adjustment Basic Procedure
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If the prints have uneven density (difference in density between front and rear), light images, or foggy background, perform the Image Adjustment Basic Procedure.
15.1.9 Others
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iR5065 / iR 5055 / iR5075 / / /
Bringing in a machine from a cold to warm room in winter for installation can cause condensation inside the machine, leading to various problems.
MEMO:
1) Condensation in the scanner (glass, mirror, lens) can cause dark images.
2) Condensation in the charging system can cause electrical leakage.
3) Condensation on the pickup/feeding guide plate can cause paper feeding faults.
If condensation is noted, dry wipe the parts, or leave the machine alone while powered for 60 min or so.