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Dell 1815DN service manual Uneven Density, Background

Models: 1815DN

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Troubleshooting

7.3.7 Uneven Density

•Description Print density is uneven between left and right.

	Check and Cause		Solution
1.	The pressure force on the left and right	1.	Replace both the left and right Spring
	springs of the transfer roller is not even,		Holder.
	the springs are damaged, the transfer
	roller is improperly installed, or the trans -
	fer roller bushing or holder is damaged.
2.	The life of the Developer has expired.	2.	Problem with the toner cartridge, replace
			the toner cartridge and try to print out.

3.The toner level is not even on the devel - oper roller due to the bad blade.

7.3.8 Background

• Description

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Light dark background appears in whole area of the printing.

	Check and Cause	Solution

1. Recycled recording paper has been		1. Quality is not guaranteed when using recy -
	used.	cled paper.
2.	The life of the Developer has expired.	2. Replace the toner cartridge.
3.	The up-to-down movement of the trans-	3. Clean the busing on the transfer roller .
	fer roller is swift?
4. The HVPS is normal?		4. Replace the HVPS.
	(Perform Engine Test Mode diagnostic
	code 4)

Service Manual 7-13

Image 106

Dell 1815DN service manual Uneven Density, Background

Contents

Dell 1815dn Page Precautions Safety WarningElectric Shock and Fire Safety Precautions Toxic materialHandling Precautions Assembly / Disassembly PrecautionsEnsure the printer is installed safely Be careful with the high temperature partWhen you move the printer Disregarding this warning may cause bodily injuryESD Precautions Super Capacitor or Lithium Battery PrecautionsTool for Troubleshooting Acronyms and Abbreviations SPL1 A4 ISO 19752 Standard Pattern Sample Pattern for the TestThis test page is reproduced at 70% of the normal A4 size Product Specifications Product OverviewProduct General Specifications RemarksSdram Items Dell Laser MFP 1815dn Remarks CopyTelephone ITU-T G3 Face Down 150Sheets/20lb Face Up 1Sheet Whql MFP System Configurations CPU PartFAX Section Modem PartModem SFX336 specification Signal Transition of DAA Solution SSD Clkp Clkn Dibp Dibn LSDLine Interface Part Ring SensitivityScan Part OPE Pannel SectionPrinter Section Items Specification Remark RTC Core Voltage PLL Main / HpvcSystem Outline Copier Section Hvps High Voltage Power Supply Telephone SectionOutput Voltage Fluctuation Method PWM Control 15%Line Regulation under +5V Smps Switching Mode Power SupplyRemark AVG TBD WhFuser AC Power Control Fixing Part Fuser Toner CartridgeLSU Laser Scanner Unit Transfer Ass’yFeeding Part Duty CycleReleasing Plastic Latches General Precautions on DisassemblyWhenever servicing the machine, you must perform as follows If necessary, remove the Toner Cartridge Front CoverTake out the Cassette Open the CoverMP Tray Assy Open the MP Tray AssyRear Cover Take out the Duplex UnitFace Up Cover Fuser Assy Bracket Jam Holder Side Cover Left, Right Dimm Cover Scanner Assy Pull up the Scanner Assy, as shown belowRemove the four screws securing the Scan Upper Lift the ADF Assy upward to remove itRemove the CCD Cable, as shown below Pull up the CCD Shaft and take out the Ccdm Remove the CCD Holder ADF Assy Remove the Open Cover, as shown belowADF Motor Assy Remove the Keys from the OPE Cover OPE UnitRemove the Contact Rubber from the OPE Cover Shield Controller Assy Film Cable Drive Assy Duplex Drive Assy Shield Smps Assy Connectors are located, as shown below Connection PCBFuser Drive Assy 16 Fan Pick Up Roller Assy Duplex Guide Housing With Feed Roller Pull the Feed Roller from the BushingHvps Housing Middle Cover Assy Cover Mid FrontMPF Housing Pull up the Feed Idle Shaft and the Bushs with Spring Feed Roller PartsRelease the E-Ring securing the Feed2 Gear and remove it Remove the Clutch Unit, as shown below Pull up the Feed1 Roller from the Bushing, as shown belowPick Up Gear Assy & Solenoids Exit Roller26 LSU Terminal PBATransfer Roller Parts Alignment and Adjustments Paper pathClearing Paper Jams Clearing Document Jams If the document is jammed in the paper feed areaIf the document is jammed in the paper exit area Paper Feed Jam tray Clearing Jams in the Paper PathsOperator Panel Message Location of Jam Go to Bypass tray Jam Paper Feed Jam optional trayPull the tray 1 half Pull the paper straight up and out Fuser Area Jam Paper Exit JamAlignment & Adjustments Duplex Jam Push the duplex unit to the printerDuplex Jam Paper Setting Copy Setup Fax Setup User ModeDell Laser MFP1815dnSetting-up System in Tech Mode Tech ModeHow to Enter Tech Mode To enter the Tech modeData Setup MethodFprt rom file Do not turn off the power while upgrading processLocal Machine Remote FAXSelect the Adjust Shading at Machine TestReport Protocol ListDiagnostic Engine Test ModeTo enter the Engine Test Mode To enter the Engine Test modeDetail DescriptionEngine Test Mode Laser Motor OnOffIdentify Sale Date Consumables and Replacement Parts Component Replacement CycleAbnormal Image Printing and Defective Roller Heat RollerError Messages Display Meaning Suggested solutionsToner Empty Wrong Print Position Paper Feeding ProblemsCheck and Cause Solution 2 JAM3 JAM 4 JAMMulti-Feeding Paper rolled in the fuserPaper rolled in the OPC Defective ADFDefective LCD Operation Printing Problems malfunctionDisplay DescriptionPaper Empty without indication Not functioning of the fuser gear due to melting awayPaper Empty Motor breaks away from its place due to gear melting awayDoor Open No Beep on when the Door is openError lamp is on even when the print Door is closed Check the insertion of the Door S/W ConnectNo Power Defective Motor operationVertical Line Getting Curved Replace LSUVertical Black Line and Band Printing Quality ProblemsVertical White Line Horizontal Black Band Black/White SpotLight Image Dark Image or a BlackUneven Density BackgroundHvps board Life of developer is expired GhostAbove directions Stains on the front Stains on back Blank Page Print outNo Dial Tone Fax & Phone ProblemsDefective MF Dial Defective FAX FORWARD/RECEIVE Defective FAX ForwardFAX at another fax machine Defective FAX ReceiveDial Telephone line Another machine receiving a FAX additionally Sent toDefective Automatic Receiving To the FAX ModeDescription The automatic receiving function is not working White Copy Copy ProblemsBlack Copy Abnormal noise Defective Image QualityDefective PC Scan Scanning ProblemsDefective Image Quality of PC Scan Service for the Life of Toner Cartridge Toner Cartridge ServicePrecautions on Safe-keeping of Toner Cartridge Open the Front CoverSigns and Measures at Poor toner cartridge Never use usual alcohol Fault Signs Cause & CheckWhite Black spot Recycled productFault Signs Cause & Check Solution Ghost & Image Network Problems Troubleshooting General ProblemsMacintosh Problems Windows ProblemsSyncThru Installation Problems Page8-4 Page8-2Page8-3 Page8-5Exploded MainViews Cover Assy Middle Cover Assy Front Cover Assy Rear Cover Assy Frame Assembly Fuser Drive Assy Main Drive AssyMP Assy ADF Assy Cover Platen Assy OPE Unit Scanner Assy Cassette Assy Fuser Assy Duplex UnitOptionalParts ListModel Dell 1815dn Rear Cover Assy Fuser Drive Assy MP Assy Cover Platen Scanner Assy Fuser Assy BELT-TIMMING Block Diagram Connection Diagram Dell 1815dn recommended spare part list Modems, Accessories