Canon iR5570 Series Service Manual Download

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Chapter 14

14-1

14.1 Making lnitial Checks

14.1.1 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.

Check the site of installation to see if it meets the requirements.

14.1.2 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".

14.1.3 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.

14.1.4 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.

14.1.5 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 contactÅ@with the drum.

Otherwise, "light images" may occur.

2) Check to make sure that the surface of the developing cylinder is coated with an evenÅ@layer of toner.

Otherwise, "light images" or "uneven density" may occur.

14.1.6 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.

Canon iR5570 Series, Service Manual

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