Chapter 12 143Troubleshooting When an Error is Displayed Regarding Automatic Duplex Printing Error No.: 300 is DisplayedCause ActionThe correct media size is notselected in the printer driver.Check the Page Size setting from within your application software toensure that it matches the size of the paper loaded.Check [Page Size] on the [Page Setup] tab in the printer properties dialogbox (Windows) or the [Page Setup] dialog box (Macintosh) to ensure that itmatches the size of the paper loaded.The page sizes that can be used for Automatic Duplex Printing are Letter,A4, B5, A5, and 5" x 7" / 127.0 x 177.8 mm. Check that the page size of theloaded paper is correct.NoteTo print on both sides of the page manually, follow the procedure below.On the [Page Setup] tab, clear the [Automatic] check box. Then try printingagain.The manual duplex printing function cannot be used.Cause ActionThe machine is not ready. Ensure that the lamp on the Operation Panel lights.If the lamp on the Operation Panel is off, turn the machine on.While the Power Lamp is flashing green, the machine is initializing. Waituntil the Power Lamp stops flashing and stays lit.When the Alarm Lamp lights orange, an error may occur in the machine.For details on how to resolve the error, see “An Error Message isDisplayed on the LCD” on page 115.Machine is not properly connected. Ensure that the printer cable is securely connected to the computer.z If using a switching hub or other device, disconnect the machine andreconnect it directly to the computer and try printing again. Ifsuccessful, the problem may have been with the device.z There could also be a problem with the cable(s). Replace the cable(s)and try printing again.The name of the machine being usedis not selected in the [Printer] pull-down menu of the [Print] dialog box.Select [MP950] from the [Printer] pop-up menu in the [Print] dialog box ofthe printer driver.If [MP950] is not displayed in the printer list, follow the procedure below toconfirm the settings.1. Select [Edit Printer List...] from the [Printer] pop-up menu in the [Print]dialog box. The printer list is displayed.2. Check that [MP950] is displayed in the printer list.If [MP950] is not displayed, install the MP Drivers again referring to theEasy Setup Instructions for the operation.
