Question about Canon imageRUNNER 400S Copier

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Need more quality

Though i have increased the darkness, and copier - adjust the quality of the copy has not increased. i changed the drum also. to improve the quality what shall i do sir/

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  • 47 Answers

First, put all the settings back the way you found them, There should be a label on the inside of the front door with the original specs. Then set the ip_ofst and pri to the specs on the front of the drum unit. Then run d-Gamma under function>DPC and then run thru the procedure in function>dens. If you still have troubles then dump out the toner out of the developer unit and start with fresh toner.

Posted on Nov 26, 2008

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1 Answer

Improve dark quality


First replace your toner and pour good quality toner & drum. Press *28* Copier -> Adjust -> HV-PRI -> P-DC & P-NO DC Increase the values. When it is to dark decrease the two values.

Oct 01, 2012 | Canon imageRUNNER 400S Copier

1 Answer

Copy is very light. Cannot open the MENU & hence cannot adjust the darkness of the Copy.


First off all to go to menu Press star (Additional function) - 28 together and again star Go to Function - Density and increase/ decrease the number. DE - DC- 24 Dev - 15 Off - 128 Den - 7-9 And again There may be a number of reasons for a light copy 1. Drum - change the drum if it is run above 10 - 20000 copies 2. Blade - changing the blade simultaneously to improve the copy quality
Thanking you.

Jul 02, 2011 | Canon imageRUNNER 400S Copier

1 Answer

When we make copies they come out really, really dark. We have the setting as light as it will go. How can we resolve this?


  • try this when a dark image of original.
  • clean the scanner cavity,lenses,mirrors,scaner lamp reflector
  • adjust/increase scaning lamp voltage (on lamp regulater pcb)
  • clean/adjust hight of charging corona wire
  • adjust bais voltage in servce mode (add function then both key2 and 8 saimantaniously then add funtion)
  • adjust/replace cleaning blade
  • replace scanner lamp
  • Try this when zed black copy came out
  • check scanner lamp is working
  • check developing unit connection and contacts
  • check drum earthing contact

Jan 06, 2011 | Canon NP 6230 Copier

1 Answer

Poor copy quality


The drum, developer and other parts have a certain life that they are good for. After they go beyond that cycle they can start to run dirty, use alot more toner, basically give you problems until a complete maintenance is done. The drum can have permanent light fatigue, even though they look good and in alot of cases one side will start to get darker than the other. You should get an estimate of what it'll cost to have servicing done and compare that with the cost of a new or refurbed machine. If the copier is very old, it might be worth it to get a new one. Good luck, please rate this if it helped you. Thanks

Jul 02, 2009 | Xerox Office Equipment & Supplies

1 Answer

I want to darken copys on my canon pc850


it seems you used the cartridge upto 3 times usage. you may need to change the drum.

Feb 17, 2009 | Office Equipment & Supplies

1 Answer

Bad photo quality after changing drum


your laser printer
1) print color quality is now distorted that means print skew (technician called)
2) print tint means the print color not enough density,
3) print mottle means print dirty
you may try
1) print distorted--- find out the skew adjustment from your printer manu, it is adjust the image before transfer to the drum.
2) print skew could be happened when the drum replace install not very accurate, so install it more carefully.
3) print tint---you may increase print density from the manu, not fix,
4) print tint---the toner caridge near life cycle or using the less compatible toner. so you have change the quality toner or cartridge (if near life cycle) to improve quality photo print
5)print mottle---toner quality ? or cartridge near life cycle also cause print dirty paper,

Feb 08, 2009 | Konica Minolta magicolor 2300DL Laser...

1 Answer

Copying quality is not good


you need to make carbonation form the tools

if the bad quality form the print you need to to change the defaults print

best regards

Nov 26, 2008 | Canon (6981A002AA) for imagerunner 2200,...

1 Answer

No copy quality in my ir400


to improove copy quality
1: clan the cd unit & use fresh toner
2: clean the primary & transfer charging rollors

Nov 25, 2008 | Canon MF8180C Color Laser MFC Printer

2 Answers

COPIES TOO DARK ON CANON COPIER NP6035


First of all did you clean the optic? How about did you replace all of the corona wires? Also, did you clean the scanning lamp as well? Also when you had fitted the new drum, did you use a brand new one or a different one, did you clean the drum with rubbing alc. If all that was done, do a "AE" adjustment in service mode using white paper on the copy board glass. Also, go to the addictional funcation mode and go to expossure adjustment and make it lighter. Or as a last effort adjust the corona hieghts of the primary corona wires. Good Luck...

May 01, 2008 | Canon NP 6050 Copier

1 Answer

Copy Quality Problem for Thiashen


bit vague...Cq not good? What does that mean?
Light copies> could be related to toner or ROS unit (laser unit)
if prints OK but copies U/S clean mirrors and ccd lens
Dark copies , streaking? Cleaning blade /drum unit U/S
or could be streaking from fuser roll
Patchy copies , dark edges, light edges ???????
more detail please

Feb 02, 2008 | Office Equipment & Supplies

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