Troubleshooting Image Quality
Contents
1. Image Skew Analog Copier 1 Aligning roller out of spec or used 2 Optics Scanner misaligned 3 Incorrect paper type causing feed skew 4 Media incorrectly installed in paper tray 5 Paper path obstruction 6 original guide plate slightly diagonal 7 Document Feeder original belt used 8 Original glass surface dry 1 Adjust replace aligning roller 2 Align Optics scanner to factory specification 3 Refer to manual for media specifications 4 Adjust tray guides 5 Monitor paper feed path and correct 6 Align original guide plate on glass 7 Replace adjust clean document feed belt 8 Apply lubricant evenly on glass Digital Copier Laser Printer 1 If repeated at specific interval refer to defective ruler or measure distance 2 Mag Roller bias fluctuating 3 HVT shorting 1 Replace part matching repetitive distance diameter 2 Verify replace mag Roller or contact 3 Replace HVT Digital Copier Laser Printer 1 Aligning roller out of spec or used 2 Laser Scanner misaligned 3 Incorrect paper type causing feed skew 4 Media incorrectly installed in paper tray 5 Paper path obstruction 6 original guide plate slightly diagonal 7 Document Feeder original belt used 8 Original glass surface dry 1 Adjust replace aligning roller 2 Align Laser scanner to factory specification 3 Refer to manual for media specifications 4 Adjust tray guides 5 Monitor paper feed path and correct 6 Align2. Replace Doctor Blade Bar Change Mag roller busing Replace Drum Change Mag Developer roller Digital Copier Laser Printer Fluctuating Laser scanner unit HVT defective or dirty contacts Defective Transfer roller Erratic bias voltage Replace Laser scanner unit 2 Clean all HVT related contacts replace HVT 3 Replace Transfer roller 4 Verify Mag Roller contact Replace HVT Solution OS Analog Copier Solution Faulty Registration Analog Copier 1 Aligning rollers dirty worn 2 Registration clutch slipping 3 Paper set incorrectly in cassette 4 Worn feed rollers 5 feed one way bearing slipping 6 Incompatible paper type creating feed delay 7 Photoconductor slipping 1 Clean replace aligning roller 2 Replace adjust registration clutch 3 Verify paper tray guides and max allowable paper is within the line indication correct as required 4 Replace all paper tray rollers 5 Clean one way bearing and shaft replace if required 6 Refer to manual for paper specification 7 Verify drum flanges AGBoCc AQBoCc AGBoCc AqaBboCc AGBoCc Gray Dark background copy Dirty Optics Overtoning Low Bias voltage Incorrect drum potential Charge voltage set to high Depleted Developer Poor drum ground 1 Clean mirrors 2 Calibrate toner ratio 3 Adjust replace HVT 4 Perform drum potential adjustment or replace drum 5 Adjust replace HVT 6 Replace developer 7 Replace
3. clean drum shaft ground contact Apply conductive grease Digital Copier Laser Printer 1 Aligning rollers worn dirty 2 Registration clutch slipping 3 Paper set incorrectly in cassette 4 Worn feed rollers 5 feed one way bearing slipping 6 Incompatible paper type creating feed delay 7 Photoconductor slipping 1 Clean replace aligning roller 2 Replace adjust registration clutch 3 Verify paper tray guides and max allowable paper is within the line indication correct as required 4 Replace all paper tray rollers 5 Clean one way bearing and shaft replace if required 6 Refer to manual for paper specification 7 Verify drum flanges Digital Copier Laser Printer 1 High Bias voltage monocomponent 2 Low bias voltage dual component 3 Overtoning 4 Charge voltage set too low 5 Depleted Developer 6 Poor drum ground 7 Incorrect drum potential 1 Adjust Bias voltage to spec Replace HVT 2 Adjust Bias voltage to spec Replace HVT 3 Calibrate toner ratio 4 Adjust replace HVT 5 Replace Developer 6 Replace clean drum shaft ground contact Apply conductive grease 7 Perform drum potential adjustment or replace drum Solution Solution Horizontal white lines Analog Copier 1 If repeated at specific interval refer to defective ruler or measure distance 2 Drum arching 3 HVT shorting 1 Replace part matching repetitive distance diameter 2 Replace drum 3 Change HVT
4. original guide plate on glass 7 Replace adjust clean document feed belt 8 Apply lubricant evenly on glass Solution Solution Toner not fused smeared Analog Copier 1 Incompatible paper type 2 Incorrect fusing temperature for media type 3 Defective worn fuser rollers 4 Insufficient pressure between Upper and Lower fuser rollers 1 Refer to manual for media specification 2 Refer to manual for media fuser setting 3 Replace fuser rollers and cleaning web oily roller 4 Adjust fusing roller pressure replace fuser i ify pressure springs Wavy Print Analog Copier Scanner mirrors out of true Lens CCD assembly misaligned Drum asymmetrical worn Drum condensation Original not placed flat on glass Damaged drive gear belt Adjust to factory specification Adjust to factory specification Replace drum Turn on damp heaters if available or relocate system in a room temperature environment 5 Adjust lid document feeder for appropriate pressure when in lowered position 6 Locate and replace defective gear or belt Digital Copier Laser Printer 1 Incompatible paper type 2 Incorrect fusing temperature for media type 3 Defective worn fuser rollers 4 Insufficient pressure between Upper and Lower fuser rollers 1 Refer to manual for media specification 2 Refer to manual for media fuser setting 3 Replace fuser rollers and cleaning web oily roller 4 Adjust fusing roller pressure repl
5. Copier Laser Printer 1 Residual toner remains on drum at end of print cycle 2 Dirty transfer roller or transfer plate 3 Dirty pressure roller 1 Replace drum wiper blade discharge lamps 2 replace transfer roller clean plate 3 Clean replace pressure roller or oily cleaning roller Solution Solution Humid Paper Worn or uneven fuser rollers Paper feeds crooked Dirty fuser plate Obstruction in Replace paper with fresh batch Replace or adjust fuser roller pressure 3 Replace roller adjust paper feed guide 4 Clean fuser plate surface 5 Observe and adjust Curl Analog Copier 1 Media type does not meet system specifications 2 Incorrect fusing temperature for media 3 Humid paper 4 fusing rollers pressure incorrect 1 Refer to manual for media requirements 2 Refer to manual for temperature adjustment 3 Replace paper with fresh batch 4 Reduce fuser roller pressure Digital Copier Laser Printer Humid Paper Worn or uneven fuser rollers Paper feeds crooked Dirty fuser plate Obstruction in Replace paper with fresh batch Replace or adjust fuser roller pressure 3 Replace roller adjust paper feed guide 4 Clean fuser plate surface 5 Observe and adjust Digital Copier Laser Printer 1 Media type does not meet system specifications 2 Incorrect fusing temperature for media 3 Humid paper 4 fusing rollers pressure incorrect 1 Refer to manual for media requirem
6. Solution Solution Inspect Fuser components Worn Transfer Roller Defective Drum Replace Worn Fuser part s Change or clean Transfer Roller Replace Drum Try different AGBbCc Horizontal Black lines Analog Copier 1 If repeated at specific interval refer to defective ruler or measure distance for part diameter 2 Drum or PCR arching 3 Bias fluctuating 1 Replace part matching repetitive distance diameter 2 Replace drum or PCR clean contacts 3 Verify for proper bias contact Replace HVT Troubleshooting Image Quality Digital Copier Laser Printer Inspect Fuser components Worn Transfer Roller Defective Drum Replace Worn Fuser part s Change or clean Transfer Roller Replace Drum Try different Digital Copier Laser Printer 1 If repeated at specific interval refer to defective ruler or measure distance for part diameter 2 Laser synchronization problem 3 Bias fluctuating dual component 1 Replace part matching repetitive distance diameter 2 Replace Laser Unit 3 Verify for proper bias contact Replace HVT Black page Analog Copier Digital Copier Laser Printer No drum ground No charge voltage on drum Blown Exposure Lamp or Fuse Laser beam continuously on Defective lamp regulator brd Defective High Voltage Exposure Lamp does not come on Exposure Lamp does not come on Replace drum verify drum shaft Replace PCR verify contacts Replac
7. ace fuser bushings verify pressure springs Digital Copier Laser Printer Laser unit defect Drum asymmetrical worn Drum condensation Original not placed flat on glass Damaged drive gear belt 1 Replace Laser scanner unit 2 Replace drum 3 Turn on damp heaters if available or relocate system in a room temperature environment 4 Adjust lid document feeder for appropriate pressure when in lowered position 5 Locate and replace defective gear or belt Parallel Half Print Analog Copier Digital Copier Laser Printer 1 Paper feed direction does not 1 Paper feed direction does not match programmed media in paper match programmed media in paper tray tray 2 Incorrect drum to developer gap 2 Incorrect drum to developer gap 3 Obstruction in the optics assembly 3 Obstruction in the laser scanner 4 Drum shutter in exposure path assembly 5 Defective discharge lamps 4 Defective led arra 1 Correct and adjust matching sizes 1 Correct and adjust matching sizes 2 Adjust gap to factory 2 Adjust gap to factory ae default replace gapping wheels default replace gapping wheels 3 Verify and remove 3 Verify and remove 4 Adjust replace drum shutter 4 Replace led array assembly 5 Replace lamps AaBbCe AaQBpCc AaBoCec AaBbCec ACDC Repetitive Defects Analog Copier Digital Copier Laser Printer tee 1 If repeated at specific interval refer 1 If repeated at specific interval refer to defective rul
8. e lamp or fuse Change DC controller or LSU solution Change lamp regulator brd Change High Voltage brd Replace Lamp Fuse or Lamp Replace Lamp Fuse or Lamp regulator board regulator board Blank page Analog Copier Digital Copier Laser Printer 1 Lost charge from PCR charge 1 Absent Mag Roller bias voltage corona mono component engines 2 Defective HVT 2 No image transfer 3 Poor charge contact 3 Poor drum ground 4 No image transfer process 4 Laser unit not illuminating 5 24V 1 Replace PCR charge corona wire 1 Replace Mag Roller or bias 2 Replace High Voltage Brd contact 3 Verify all contacts related to charge 2 Replace Transfer Roller assy and HVT 3 Change drum 4 Replace Transfer roller 4 Change LSU 5 Replace LVPS Solution Solution Solution Perpendicular Blank areas Analog Copier 1 If repeated at specific interval refer to defective ruler or measure distance for part diameter 2 Defective charging area on the Drum 3 Discharge Lamps turning on at incorrect times 4 Transfer Roller shorting 1 Replace part matching repetitive distance diameter 2 Replace drum or drum shaft 3 Verify 24V replace LVPS Check wiring 4 Replace Transfer Roller clean contacts k ih i i j Grape pattern print Analog Copier Digital Copier Laser Printer 1 Transfer Roller shorting 2 Intermittent Bias lost monocomponent 3 If repeated at specific interval refer to defective ruler or meas
9. ents 2 Refer to manual for temperature adjustment 3 Replace paper with fresh batch 4 Reduce fuser roller pressure Solution Solution Blurred Print Analog Copier 1 Drum Developer Fatigue 2 Misaligned optic mirror s 3 Developer Drum or scanner drive hindered 4 Moisture on optics or drum 5 Paper path obstructed 1 Replace drum developer 2 Refer to service manual for proper adjustment 3 Verify drum developer including drive gears is rotating freely 4 Wipe moisture Make certain humidifier heaters are enabled in copier if included 5 Examine all components are clean and installed correctl AABDCC AGBOCUC AadbCc AQBpCc AnABoCc Drop outs Analog Copier 1 Humid paper 2 Charger Transfer unit are dirty or worn 3 Paper type not porous enough 4 Developer material depleted 5 Fuser roller imperfection 6 Low density level 7 Bias voltage too high 1 Replace paper Turn on damp heaters if available 2 Clean or replace unit 3 Refer to manual and paper packaging for proper application 4 Replace developer 5 Replace fuser roller 6 Adjust density level to spec 7 Adjust to system specification Digital Copier Laser Printer 1 Drum Developer Fatigue 2 Erratic laser scanner 3 Developer Drum or scanner drive hindered 4 Defective controller board 5 Paper path obstructed 1 Replace drum developer 2 Replace laser scanner unit 3 Replace repair broken gears seized bearing and used be
10. er or measure distance to defective ruler or measure distance Senne 1 Replace part matching repetitive 1 Replace part matching repetitive distance diameter distance diameter Tire tracks Analog Copier Digital Copier Laser Printer 1 Faulty Magnetic Roller 1 Faulty Magnetic Roller 2 Soiled PCR 2 Soiled PCR 3 Obstruction in Image process 3 Obstruction in Image process components components 4 Clumped toner 4 Clumped toner 1 Replace MR 1 Replace MR Solution 2 Clean Replace PCR 2 Clean Replace PCR 3 Remove Replace obstructing part 3 Remove Replace obstructing part Solution Solution 4 System Operating Temperature 10 degrees to 32 degrees C 20 percent to 80 percent RH Consumable Storage Temperature 0 degrees to 35 degrees C 35 percent to 85 percent RH Toner specks 1 Out of spec toner recovery blade 2 Damaged magnetic roller sealing blade 3 Defective Photoconductor 4 Pin holes on PCR 1 Adjust Replace toner recovery blade 2 Adjust Replace sealing blade 3 Replace Wipe with cotton pad photoconductor 4 Replace PCR AciBoizc AcdBb Te Vertical black lines 1 Scratched drum 2 Residue on document feeder slit glass Faulty wiper blade Burnt area on exposure lamp Dirty charge corona PCR Replace drum Wipe clean slit glass Replace wiper blade Replace exposure lamp Clean replace charge 4 System Operating Temperature 10 degrees to 32 degrees C 20 p
11. ercent to 80 percent RH Consumable Storage Temperature 0 degrees to 35 degrees C 35 percent to 85 percent RH Digital Laser Printer 1 Out of spec toner recovery blade 2 Damaged magnetic roller sealing blade 3 Defective Photoconductor 4 Pin holes on PCR 1 Adjust Replace toner recovery blade 2 Adjust Replace sealing blade 3 Replace Wipe with cotton pad photoconductor 4 Replace PCR Digital Laser Printer 1 Scratched drum 2 Residue on document feeder slit glass Faulty wiper blade Burnt area on exposure lamp Dirty charge corona PCR Replace drum Wipe clean slit glass Replace wiper blade Replace exposure lamp Clean replace charge
12. lts 4 Replace controller board 5 Examine all components are clean and installed correctly Digital Copier Laser Printer 1 Humid paper 2 Charger Transfer unit are dirty or worn 3 Paper type not porous enough 4 Developer material depleted 5 Fuser roller imperfection 6 Low density level 7 Bias voltage to low monocomponent too high for dual 8 Faulty laser scanner unit 1 Replace paper Turn on damp heaters if available 2 Clean or replace unit 3 Refer to manual and paper packaging for proper application 4 Replace developer 5 Replace fuser roller 6 Adjust density level to spec 7 Adjust to system specification 8 Replace laser scanner unit Solution Solution Margin Band Analog Copier Worn Doctor Blade Bar Mag roller bushing Scored drum Defective Mag Developer roller Replace Doctor Blade Bar Change Mag roller busing Replace Drum Change Mag Developer roller Perpendicular Faded Print Analog Copier 1 Fluctuating Exposure lamp 2 HVT defective or dirty contacts 3 Defective Transfer roller 4 Discharge lamp illuminating at wrong interval 1 Verify for any cuts in scanner cable Replace lamp regulator brd 2 Clean all HVT related contacts replace HVT 3 Replace Transfer roller 4 Check broken wires Replace LVPS or Discharge lamp Digital Copier Laser Printer Worn Doctor Blade Bar Mag roller bushing Scored drum Defective Mag Developer roller
13. ure distance for part diameter 1 Replace Transfer Roller clean contacts 2 Verify bias voltage Adjust mag Roller contact 3 Replace part matching repetitive distance diameter Digital Copier Laser Printer 1 Poor Drum ground 1 Poor Drum ground 2 Erratic HVT 2 Erratic HVT 1 Replace drum and or verify ground contact 2 Replace HVT 1 Replace drum and or verify ground contact 2 Replace HVT Solution Solution Compressed print Analog Copier 1 Perform midway test and verify image on drum 2 Check feed aligning roller rotation 3 Drum flange slipping 4 Verify fuser roller drive 1 If image on drum is compressed verify optics and scanner for proper function 2 Correct as required 3 Glue flange or replace drum 4 Correct or replace fuser Contamination on back Analog Copier 1 Residual toner remains on drum at end of print cycle 2 Dirty transfer roller or transfer plate 3 Dirty pressure roller 1 Replace drum wiper blade discharge lamps 2 replace transfer roller clean plate 3 Clean replace pressure roller or oily cleaning roller Digital Copier Laser Printer 1 Perform midway test and verify image on drum 2 Check feed aligning roller rotation 3 Drum flange slipping 4 Verify fuser roller drive 1 If image on drum is compressed verify optics and scanner for proper function 2 Correct as required 3 Glue flange or replace drum 4 Correct or replace fuser Digital
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