[Misc] Typical copier troubleshooting hints (please feel free to add or improve)

[n25an]

ORIGINAL SOURCE MATERIAL TAKEN FROM SITE RECHARGEKITS.COM



SYMPTOM CAUSES REMEDY

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Light Copy :

Improper Exposure Adjustment Adjust Light / Dark Setting.

Damp or Poor Quality Paper Replace with Fresh Quality Paper.

Low Toner Concentration Check for Toner.

Improper Primary Corona Wire Height Adjust if applies. See Service Sheet.

Scratched, Nicked, or Pin Holed Drum Replace or Call Service Tech.

Improper Toner Concentration Replace Developer. See Service Sheet.

Burned Corona Wires (will appear blue) Call Service Tech for replacement.



Dark Copy :

Improper Exposure Adjustment Adjust Light / Dark Setting.

Dirty Optics, Lenses, and Mirrors Clean, see Maintenance Section Step #6.

Improper Primary Corona Wire Height Adjust if applies. See Service Sheet.

Improper Toner Concentration Replace Developer. See Service Sheet.



Blank Copy :

Broken or Missing Corona Wire Call Service Tech to repair.

Faulty Corona Block Contacts Call Service Tech to repair.



Black Copy :

Blown Exposure Lamp Replace or Call Service Tech.

Faulty Exposure Lamp Thermo Fuse Replace or Call Service Tech.

Contaminated Lamp Contacts Clean or Replace.

Light Path/Optics Obstructed Clear Obstruction.



Vertical Lines On Copy :

(top to bottom, perpendicular to paper path)



Scratched Drum/Photoreceptor Replace or Call Service Tech.

Faulty Drum Cleaning Blade Replace or Call Service Tech.

Scratched Upper Fuser Roller Replace or Call Service Tech.



Horizontal Lines On Copy :

(left to right, parallel to paper path)



Scratched Upper Fuser Roller Replace or Call Service Tech.

Scratched Drum/Photoreceptor Replace or Call Service Tech.

Faulty Drum Cleaning Blade Replace or Call Service Tech.

Exposure Lamp has Blackened Cell Replace or Call Service Tech.



Horizontal Deletion Lines :

(left to right, parallel to paper path)



Dirty Corona Wires Clean, see Maintenance Section Step #3.



White Spots

On Copy :

Nicked/Pin Holed Drum/Photoreceptor Replace or Call Service Tech.



Black Spots

On Copy :

Dirty Copyboard Glass or Optics Clean, see Maintenance Section Step #6.

Nicked/Pin Holed Drum/Photoreceptor Replace or Call Service Tech.

Contaminants on Drum Clean, Replace, or Call Service Tech.

Nicked Upper Fuser Roller Replace or Call Service Tech.

Contaminated Developer or Toner Replace or Call Service Tech.

Contaminated Drum Cleaning Roller Clean or Call Service Tech.



Copy Wipes

Off or Smudges :

Depleted Fuser Oil Add Oil if applies. See Service Sheet.

Spent Upper Fuser Cleaning Roller If applies, Replace.

Blown Lamp, Thermistor, or Thermo-Fuse Replace or Call Service Tech.



Deletions

On Copy :

Scratched or Nicked Drum/Photoreceptor Replace or Call Service Tech.

Scratched or Nicked Upper Fuser Roller Replace or Call Service Tech.



Latent Image

Stamped On Copy :

Faulty Drum Cleaning Blade Replace or Call Service Tech.

Faulty Upper Fuser Cleaning Blade Replace or Call Service Tech.

Fault Upper Fuser Cleaning Roller Replace or Call Service Tech.



Uneven Image

Density :

Uneven Primary Corona Wire Height Adjust if applies. See Service Sheet.

Scratched, Nicked, or Pin Holed Drum Replace or Call Service Tech.

Uneven Toner Concentration Call Service Tech to repair.

Exposure Lamp has Blackened Cell Replace or Call Service Tech.

[blackcat4866]

A lot of this information is obsolete (analog).

On digital MFPs, black copies almost always means main charge loss. The HVT can shut down for any number of reasons, including shorted main, transfer, pre-transfer, developing bias, and fuser bias. Xenon & fluorescent lamps last considerably longer than than halogen lamps, and are a distant second.

Likewise, blank copies are usually transfer charge or developing issues.

Main charge height is rarely adjustable any more, again analog.

This is a great list for analog, but needs considerable reworking for digital.

[n25an]

thanks