Question about Apple LaserWriter 12/640 PS Plus Printer

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Laserwriter 12/640 PS

Hi My old 12/640 Laserwriter has a "phantom paper jam", i.e., while starting up, it just picks up the paper, the motor runs for about 1 second and then stops ang gives a paper jam light. The problem seems to be known in the repair manual and refers to either a solenoid, a cable, a sensor and a board. BUT When that printer was hooked up to another puter, one could use it from the hand feed tray, which for me is enough. But now, whatever I do, it will, at power-up, try to print that test page and lock up. How can I, without the printer being hooked up to a computer, prevent it of wanting to print a test page ? Thanx, Takeo.

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Re: Laserwriter 12/640 PS

Hello the printer paper pick-up rollers are bad. this why you caanotuse the pick tray. the solution now is to set the printer to default and clear allstuff off memory. read the instruction below: LaserWriter 12/640 PS: IBM PC or Compatible Troubleshooting This article explains IBM PC or Compatible Troubleshooting. A message on the screen says the printer can't print. If you get such a message, try the following steps. Make sure that the printer is turned on. Check the network or parallel cables. Make sure that the PostScript printer driver has been installed. Nothing is printed; no paper comes out of the printer. If you don't get any response from the printer when you try to print a document, try the following steps: Check the Installed Printers list to see that your printer is selected. Try printing the document again, but choose Download PostScript Error Handling in the Printer Setup PostScript Options dialog box. Check the Paper Out light. If it is on, add paper and replace the paper cassette. If it is blinking, make sure the paper cassette is securely in place. Check for a paper jam. Check the printer cables. Check the position of the port communication switch. The port may have been turned off or the Interpreter settings may not be correct. Reset the communications settings to their factory default values by setting the communication switch to the Reset (out) position. Turn the printer off and back on again. Set the communication switch to the Normal (in) position. Turn the printer off and back on. Check the startup page. Reinstall the printer driver. For Windows 95 users, check the following additional item: Open the Printer folder, select the printer, and click Properties. click the PostScript tab and click the Advanced button. Make sure that ASCII data and "Send CTRL+D after job" are selected. For Windows 3.1 users, check the following additional item: Open the Printer Control panel, select the printer, and choose Setup. Select the PostScript tab in the Properties dialog box. Make sure that Protocol Options is set to Default if using the parallel port, or None if printing via NetWare. Sometimes Printing the First Page Takes Longer than I Expect The LaserWriter 12/640 PS automatically goes into an energy-saving mode after it's been idle for a while. When you print while it's in this mode, the printer takes about a minute to warm up before it can print the first page. The printer is properly connected and configured, but printing is garbled or displays unwanted characters. Check the communication switch and make sure that the Interpreter is set to the correct value. If you are printing a PostScript document, the Interpreter mode should be PostScript or AutoSelect.

Posted on Aug 11, 2007

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LPR (line printer remote) is a platform independent printing protocol that is associate with TCP/IP. It works by using LPR client software that communicates to a server running LPR services.

In terms of PSU, LPR printing will become the basis for all network printing while Novell print queues are phased out. Therefore, all Macintosh, Windows, and Unix computers will be configured to print through LPR.


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1.Open up the Applications folder from the OS X menu.
2.Open up the Utilities folder
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6.Now enter for the LPR Printer's address.
7.Uncheck Use Default Queue on Server option and enter the queue name of the printer.
8.Select the printer model.
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10.Click on Add
11.Your printer has successfully been installed. Test the printer by printing something to it.

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