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Also check the ground contact on the back of the feed roller. Refer to P.4-28. Paper cassette contacts 2 Are the ground contacts on the back side of the paper cassette connecting correctly? No Clean the contacts. . 6-38 CHAPTER 6 TROUBLESHOOTING I-22 Light rain Possible cause Step Check Result Remedy Drum unit failure 1 Is the problem solved after replacing the drum unit? Yes Replace the drum unit. High-voltage power supply PCB failure 2 Is the problem solved after replacing the high-voltage power supply PCB? Yes Replace the high-voltage power supply PCB. I-23 Ghost User Check (1) Check the paper used meets the recommended paper specifications. Damp paper, thick media or rough surfaced paper can cause the problem. (2) Check the printer’s environment. High temperature and high humidity conditions can cause the problem. (3) Check that the appropriate media type is selected in the printer driver. (4) Try installing a new drum unit. Possible cause Step Check Result Remedy Driver setting 1 Is thin paper such as 64g/m2 used under the thick paper mode? Yes 1) Change the current mode to the normal mode from the driver setting. 2) Print 5 or 6 blank pages if this problem occurs. Drum unit failure 2 Is the problem solved after replacing the drum unit? Yes Replace the drum unit. High-voltage power supply PCB failure 3 Is the problem solved after replacing the high-voltage power supply PCB? Yes Replace the high-voltage power supply PCB. 6-39 CHAPTER 6 TROUBLESHOOTING I-24 Toner specks User Check (1) Check the paper used meets the recommended paper specifications. A rough surfaced paper may cause the problem. (2) The toner cartridge may be damaged. Install a new toner cartridge. (3) The drum unit may be damaged, or may be nearly at the end of life. Install a new drum unit. 6-40 CHAPTER 6 TROUBLESHOOTING 6-41 7.3 Location of Grounding Contacts 7.3.1 Drum unit Fig. 6-10 7.3.2 Printer body & Paper cassette Fig. 6-11 Drum Unit Paper Cassette . Wire cleaner . Charge . Photosensitive drum . Development roller . Ground . Grid . Grid . Charge . Photosensitive drum . Development roller . Transfer roller . Transfer roller CHAPTER 6 TROUBLESHOOTING 8. INCORRECT PRINTOUT When the data is not printed correctly as it is seen on the PC screen, follow the procedures below in the event of a specific error. P-1 The printer prints unexpectedly or it prints garbage. User Check (1) Check if the printer cable is not too long. It is recommended to use a parallel cable of less than 2 meters (6.6 feet) in length. (2) Check that the printer cable is not damaged or broken. Check also that the printer cable is connected to the correct interface connectors of both the printer and PC. (3) If an interface switching device is used, remove it and connect the computer directly to the printer and try again. (4) Check that the appropriate printer driver is selected as ‘Set as Default’. Check also that the correct print port is set for the selected printer driver. (5) Check that the printer is not connected to the same port which is also connected to a mass storage device or scanner. Remove all other devices and connect the port to the printer only. Turn off the printer status monitor in the device options tab in the printer driver. (6) If the print port is set as an ECP port, change it to a normal port. (7) Try printing the test page referring to Subsection 10.1 ‘Test Print Mode’ in this chapter. (8) Try resetting the factory settings. Possible cause Step Check Result Remedy Failure inside the printer 1 Is it possible to print the test page with the method of Subsection 10.1 ‘Test Print Mode’ in this chapter? No Identify the error type, then refer to the specified section of this chapter. Main PCB failure 2 Is it possible to print with another PC, printer cable and RS-100M**? No Replace the main PCB. RS-100M** failure 3 Is it possible to print with another PC and cable? No Replace the RS-100M. Yes This problem may appear under the specified system environment. Check the environment which the user used. **NOTE: Take Step 2 when using the RS-100M or take Step 3 only when this problem appears while using the RS-100M. NOTE: If the printer prints garbage or incorrect fonts, instruct the user to use the ‘Troubleshooting for Printer won’t print’ tool of the self-diagnostics tools. If the problem cannot be solved, instruct user to use the ‘Diagnostics’ tool described in the Appendix so that you can get a log file to investigate the cause of the problem. For details on the self-diagnostics tools, see APPENDIX 5 ‘HOW TO USE SELF-DIAGNOSTICS TOOLS’. 6-42 CHAPTER 6 TROUBLESHOOTING P-2 Unable to print full pages of a document with the “PRINT OVERRUN” message. User Check (1) Press the panel button to print the data remaining in the printer. (2) If this does not clear the error, reduce the complexity of your document or reduce the printer resolution. (3) Expand the printer memory by adding a commercially available SIMM. (HL-1250/1270N only) (4) Change the following sett...

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