Ricoh P 311 Users Guide - Page 174

7. Troubleshooting Print Quality Problems Checking the Condition of the Machine If there is a problem with the quality of printing, first check the condition of the machine. Possible Cause Solution There is a problem with the machine's location. Make sure that the machine is on a level surface. Place the machine where it will not be subject to vibration or shock. Unsupported types of paper is used. Make sure that the paper being used is supported by the machine. See page 43 "Supported Paper". The paper type setting is incorrect. Make sure that the paper type setting of the printer driver matches the type of paper loaded. See page 40 "Specifying Paper Type and Paper Size Using the Printer Driver". A non-genuine print cartridge is being used. Refilled or non-genuine print cartridge reduces print quality and can cause malfunctions. Use genuine print cartridge only. An old print cartridge is being used. Print cartridge should be opened before their expiration date and used within six months of being opened. The machine is dirty. See page 141 "Maintaining the Machine", and clean the machine as required. Humidity level surrounding the machine may be too low. Using the machine in a room where humidity level is too low may cause black lines of a few millimeters thick to appear on printouts with 75-millimeter spaces in between. In this case, set [Low Humidity Mode] to [On]. For details about how to configure the settings, see page 79 "System Settings Menu". 172