CLX-317x Series Training Feb. 2008 CRU Technical Notes

Objectives Understanding and building the ability to deal with Component and layout of OPC-unit / dev-unit Operations of each component and unit 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

Ⅱ. Composition & Function 1. Toner Cartridge Yellow Toner Cartridge Magenta Toner Cartridge Cyan Toner Cartridge Black Toner Cartridge Be careful not to damage dev. roller while plug- in & out of toner cartridge Front Cover High voltage contact point (Developing Roller) High voltage contact point (Supply Roller) CRUM

Ⅱ. Composition & Function 1. Toner Cartridge 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) Sus. Blade Developing Roller High voltage contact point (Supply Roller) Spacer DR(Gap-Ring) High voltage contact point (Developing Roller)

Ⅱ. Composition & Function 1. Toner Cartridge Gear train : Torque transferred from SET drive gear to DR gear. Gear IDLE Gear Agitator Gear Paddle Gear SR Gear DR

Ⅱ. Composition & Function 1. Toner Cartridge Toner Supply Type : toner slider and supply roller Toner layer control : toner layer thickness on dev. roller controlled by SUS. blade’s trail-edge Dev. gap control : gap ring located at both sides of dev. roller Developing roller Toner Slider Supply roller Toner Agitator Shaft Paddle wire

Ⅱ. Composition & Function 2. OPC Unit Layout OPC(Organic Photo-Conductor) Life : Print over 35,000 Images OPC Cleaning: Cleaning Blade (urethane)

Ⅱ. Composition & Function 2. OPC Unit Layout OPC(Organic Photo-Conductor) OPC Drum Shaft OPC Handle OPC Cleaning blade Charger Roller Slider Waste OPC Shaft Paddle OPC Cleaning Roller Erager Lamp

Error List Ⅱ. Composition & Function 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

Ⅳ. Printing Problems &Solution 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 Damaged development roller, deformed doctor-blade : In case of one color Scratched / contaminated surface of the charging roller in OPC set : all colors layered Damaged / contaminated ITB (Image Transfer Belt) : waste toner color Damaged / deformed cleaning blade (OPC/ITB) : waste toner color Replace toner cartridge and retest. Replace OPC cartridge and retest. Replace ITB cartridge and retest. Replace OPC or ITB and retest.

Ⅳ. Printing Problems &Solution 2. Vertical White Line Description: White vertical lines in the image. Check and Cause Solution Contamination of the window or internal lenses of LSU : in case of all colors Foreign matter in toner cartridge : one color If the fuser is damaged, white spots occur periodically : all colors ITB cleaning blade could touch with ITB wiping off a part of image : all colors Clean the LSU window with recommended cleaner (IPA). If foreign matter is inside LSU, replace LSU unit. Replace toner cartridge. Replace ITB unit. Check the fuser ribs corresponding to white spot. Remove foreign matter or replace parts.

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 Solution Bad contacts between the imaging unit and high voltage terminals. The rollers in the toner cartridge may be contaminated. Charge roller – 37.7 mm Supply roller – 32.8 mm Develop roller – 26 mm Transfer roller(T1) – 43.8 mm Transfer roller(T2) – 55.2 mm OPC Drum – 188.5 mm Fusier – 88.4 mm Clean all high voltage terminals in the cartridge and the frame of the printer. See the periodic table in the left to identify what sort of unit or component causes the problem. Replace the relevant unit.

2. White spots occur periodically in the printing 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 Solution Foreign matter sticking or contamination on toner cartridge, OPC drum, ITB unit, or fuser. 1) Charge roller – 37.7 mm 2) Supply roller – 32.8 mm 3) Develop roller – 26 mm 4) Transfer roller(T1) – 43.8 mm 5) Transfer roller(T2) – 55.2 mm 6) OPC Drum – 188.5 mm 7) Fusier – 88.4 mm See the periodic table in the left to identify what sort of unit or component causes the problem. Replace the relevant unit.

Ⅳ. Printing Problems &Solution 5. Dark Image or Black Description: The printed image is dark Check and Cause Solution No charging voltage in the engine board. Regardless of printable image, composite black image is printed. There could be a problem in charging process In the case, it could cause wrap jam in the fuser Check electric contacts to the HVPS

Ⅳ. Printing Problems &Solution 6. Uneven Density Description: Print Density is uneven between left and right Check and Cause Solution 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. Toner cartridge has been expired. Toner level is too low in the development cartridge. Check if transfer roller and connected parts are properly installed Replace ITB unit Replace toner cartridge

Ⅳ. Printing Problems &Solution 7. Ghost Description: Ghosting occurs in the interval of 26 mm or 188.5mm Check and Cause Solution Bad contacts by contamination or foreign matter in HVPS board Toner cartridge is expired. Bad OPC Check electric contacts to HVPS. Replace HVPS board Replace toner cartridge Replace OPC unit

Ⅳ. Printing Problems &Solution 8. Stains on the printout Description: The printout are stained Check and Cause Solution Toner leakage due to improper sealing in development unit. Poor cleaning of OPC Unit or ITB Unit Replace toner cartridge Replace 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 Solution 55.2 mm: 2nd Transfer roller could be contaminated when engaged or disengaged. 88.4 mm: Fuser roll could be contaminated due to cold offset Check the period and replace the part with problem. 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.

Ⅳ. Printing Problems &Solution 10. Blank page Print out Description: Blank page is printed Check and Cause Solution Bad electric contacts in toner cartridge or OPC unit LSU Unit error No development high voltage applied from HVPS Check OPC-ground contact. Check LSU Unit Check HVPS Board

White /Black Spot, Periodical Band Ⅳ. Printing Problems &Solution Table. Periodic Images according to Rollers 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 5 Transfer Roller(T1) 43.8 mm 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