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CLX-317x Series TrainingFeb. 2008
CLX-317x Series TrainingFeb. 2008
CRU Technical Notes
ObjectivesObjectives
Understanding and building the ability to deal with
I. Component and layout of OPC-unit / dev-unit
II. Operations of each component and unit
III. Troubleshooting: possible problems in the field and
solution to each problem
I. Consumable Part
For the best image quality, replace cartridges within appropriate time
Capacity : (additional) 1,000 images (Y,M,C) & 1,500 (K) images
(initial w/ set) 700 images (Y,M,C) & 1,000 (K) images
Black Toner Cartridge
Front Cover
CRUM
Ⅱ. Composition & Function
High voltage contact point (Supply Roller)
Cyan Toner Cartridge
High voltage contact point (Developing Roller)
Magenta Toner Cartridge
Yellow Toner Cartridge
Be careful not to damage dev. roller while plug- in & out of toner cartridge
1. Toner Cartridge
Ⅱ. Composition & Function
Spacer DR(Gap-Ring)
Developing RollerSus. Blade
High voltage contact point (Developing Roller)
High voltage contact point (Supply Roller)
Development Method : Non-magnetic one component type
Toner type : non magnetic one component pulverized toner
Capacity : 1,000(Y,M,C) / 1,500(K) Sheets (N/N, Simplex, ISO/IEC 19798 standard pages)
1. Toner Cartridge
Ⅱ. Composition & Function
Gear DR
Gear IDLEGear AgitatorGear Paddle
Gear SR
Gear train : Torque transferred from SET drive gear to DR gear.
1. Toner Cartridge
Ⅱ. Composition & Function
Developing roller
Toner Slider
Supply roller
Toner AgitatorShaft Paddle wire
Toner layer control : toner layer thickness on dev. roller controlled by SUS.
blade’s trail-edge
Toner Supply Type : toner slider and supply roller
Dev. gap control : gap ring located at both sides of dev. roller
1. Toner Cartridge
2. OPC Unit Layout
Life : Print over 35,000 Images
OPC(Organic Photo-Conductor)
OPC Cleaning: Cleaning Blade (urethane)
Ⅱ. Composition & Function
OPC(Organic Photo-Conductor)
OPC Drum
Shaft OPC Handle OPC
Cleaning blade
Charger Roller
Slider Waste OPC
Shaft Paddle OPC
Cleaning Roller
Erager Lamp
Ⅱ. Composition & Function
2. OPC Unit Layout
Error List
• Invalid toner– Invalid Yellow (M/C/K) toner kit– Mismatch of model name, supplier ID, company name and etc.
• Not install– Toner cartridge (Y/M/C/K) is not installed
• Service call error– Fuser Low (Over) heat error– LSU error – Transfer belt error – Dev. Home error– Motor Lock error
Ⅱ. Composition & Function
1. Replace toner cartridge and retest.
2. Replace OPC cartridge and retest.
3. Replace ITB cartridge and retest.
4. Replace OPC or ITB and retest.
1. Vertical Black Line and Band
Description: 1. Straight thin black vertical lines occur on the printout 2. Dark black vertical bands occurs on the printout
Check and Cause Solution
1. Damaged development roller, deformed doctor-blade : In case of one color
2. Scratched / contaminated surface of the charging roller in OPC set : all colors layered
3. Damaged / contaminated ITB (Image Transfer Belt) : waste toner color
4. Damaged / deformed cleaning blade (OPC/ITB) : waste toner color
Ⅳ. Printing Problems &Solution
2. Vertical White Line
Description: White vertical lines in the image.
Check and Cause
1. Clean the LSU window with recommended cleaner (IPA).
2. If foreign matter is inside LSU, replace LSU unit.
3. Replace toner cartridge.
4. Replace ITB unit.
5. Check the fuser ribs corresponding to white spot. Remove foreign matter or replace parts.
Solution
1. Contamination of the window or internal lenses of LSU : in case of all colors
2. Foreign matter in toner cartridge : one color
3. If the fuser is damaged, white spots occur periodically : all colors
4. ITB cleaning blade could touch with ITB wiping off a part of image : all colors
Ⅳ. Printing Problems &Solution
3. Horizontal Dark Band or White Band
Description: Dark or blurry horizontal stripes occur on the printout periodically
Check and Cause
1. Clean all high voltage terminals in the cartridge and the frame of the printer.
2. See the periodic table in the left to identify what sort of unit or component causes the problem.
Replace the relevant unit.
Solution
1. Bad contacts between the imaging unit and high voltage terminals.
2. The rollers in the toner cartridge may be contaminated.
1) Charge roller – 37.7 mm2) Supply roller – 32.8 mm3) Develop roller – 26 mm 4) Transfer roller(T1) – 43.8 mm 5) Transfer roller(T2) – 55.2 mm 6) OPC Drum – 188.5 mm7) Fusier – 88.4 mm
Ⅳ. Printing Problems &Solution
4. Black / White Spot
Description: 1. Dark or blurry spots occur periodically in the printing 2. White spots occur periodically in the printing
Check and Cause
See the periodic table in the left to identify what sort of unit or component causes the problem. Replace the relevant unit.
Solution
Foreign matter sticking or contamination on toner cartridge, OPC drum, ITB unit, or fuser.
1) Charge roller – 37.7 mm2) Supply roller – 32.8 mm3) Develop roller – 26 mm 4) Transfer roller(T1) – 43.8 mm 5) Transfer roller(T2) – 55.2 mm 6) OPC Drum – 188.5 mm7) Fusier – 88.4 mm
Ⅳ. Printing Problems &Solution
5. Dark Image or Black
Description: The printed image is dark
Check and Cause
Check electric contacts to the HVPS
Solution
1. No charging voltage in the engine board.
2. Regardless of printable image, composite black image is printed. There could be a problem in charging process
3. In the case, it could cause wrap jam in the fuser
Ⅳ. Printing Problems &Solution
6. Uneven Density
Description: Print Density is uneven between left and right
Check and Cause
1. Check if transfer roller and connected parts are properly installed
2. Replace ITB unit
3. Replace toner cartridge
Solution
1. The pressure on the transfer roller by right and left spring is not even: springs are damaged, transfer roller is improperly installed, or transfer roller’s bushing or holders are damaged.
2. Toner cartridge has been expired.
3. Toner level is too low in the development cartridge.
Ⅳ. Printing Problems &Solution
7. Ghost
Description: Ghosting occurs in the interval of 26 mm or 188.5mm
Check and Cause
1. Check electric contacts to HVPS. Replace HVPS board
2. Replace toner cartridge
3. Replace OPC unit
Solution
1. Bad contacts by contamination or foreign matter in HVPS board
2. Toner cartridge is expired.
3. Bad OPC
Ⅳ. Printing Problems &Solution
8. Stains on the printout
Description: The printout are stained
Check and Cause
1. Replace toner cartridge
2. Replace OPC Unit or ITB Unit
Solution
1. Toner leakage due to improper sealing in development unit.
2. Poor cleaning of OPC Unit or ITB Unit
Ⅳ. Printing Problems &Solution
9. Stains on Back of Page
Description: The back of the page is stained periodically
Check and Cause
1. Check the period and replace the part with problem.
2. If there is a problem with disengagement, please check the operation of the clutch of driving T2 Roller, and replace it if it is necessary.
Solution
1. 55.2 mm: 2nd Transfer roller could be contaminated when engaged or disengaged.
2. 88.4 mm: Fuser roll could be contaminated due to cold offset
Ⅳ. Printing Problems &Solution
10. Blank page Print out
Description: Blank page is printed
Check and Cause
1. Check OPC-ground contact.
2. Check LSU Unit
3. Check HVPS Board
Solution
1. Bad electric contacts in toner cartridge or OPC unit
2. LSU Unit error
3. No development high voltage applied from HVPS
Ⅳ. Printing Problems &Solution
No Roller Period 현상
1 OPC Drum 188.5 mm White /Black Spot
2 Charge Roller 37.7 mm White /Black Spot
3 Supply Roller 32.8 mm Periodical Band
4 Developing Roller 26.8 mm White /Black Spot, Periodical Band
6 Transfer Roller(T2) 55.2 mm Periodical Band
7 Gap-ring 32.84mm Periodical Band
8 Fusing Belt 32.9 mm White /Black Spot
Table. Periodic Images according to Rollers
Ⅳ. Printing Problems &Solution
5 Transfer Roller(T1) 43.8 mm Periodical Band
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