Canon NP6320 Service Manual

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Canon NP6320 Service Manual Manual pdf 200 page image

CHAPTER 10 TROUBLESHOOTINGCOPYRIGHT © 1999 CANON INC. CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)10-22III. IMAGE TROUBLESHOOTINGA. Initial Check1. Checking the Installation Environmenta. The line voltage should be within 10% of the voltage on the rating plate.b. The copier should not be installed in a hot or humid location (such as near a water faucet orhumidifier), a cold area, near an open flame, or in a dusty location.c. Do not install the copier in a location where ammonia gas is generated. (diazo copiers, etc.)d. Do not install the copier in direct sunlight. If such a location is unavoidable, install curtains orother means to block out sunlight.e. Install the copier in a well-ventilated location.f. Install the copier where it can be set level.2. Check the OriginalDetermine if the trouble is due to the original or a malfunction of the copier.a. The copy density lever should normally be set to 4.5 ± 1.5.b. Check if the original has a background color, such as yellow, which causes poor contrast.c. Check the density of the original.Examples:Originals which are diazo copies or transparent originals ... Copies are likely to be mistak-enly judged as being foggy.Pencil originals ... Copies are likely to be mistakenly judged as having a light image.3. Check the Copyboard Cover or the Copyboard GlassIf the cover or glass is dirty, clean it with a mild detergent or with alcohol. If there is damage,replace the damaged part.4. Check Corona Assembliesa. Check for dirt on the corona assemblies or abnormalities (such as scratches) on the coronawires.b. Clean the corona wires and shield plates of each corona assembly. (Replace the wires if the dirtcannot be removed.)c. Ensure that each corona assembly is installed correctly.d. Make sure that the corona wire tension springs are not rusted.5. Check the Transfer Feed GuidesIf the transfer guides or feed guides are dirty, clean them with a damp cloth.6. Check the Fixing Assembly7. Check the Static Charge EliminatorDownload Service Manual And Resetter Printer at http://printer1.blogspot.com