Ready to receive data. Cartridges that are run for long periods of time in high temperature and humidity conditions may develop this problem. Replace the EP Toner Cartridge. Use a slender object like a flat-blade screwdriver. If the voltage is present, and the motor does not rotate, replace the Main Motor Assembly see Figure for location.

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The RAM memory is used to store temporary information that will be used by laserjdt printer for a particular print job or a series of print jobs.

HP LaserJet 4

An internal duplexer enabled full-speed double-sided printing. Then, items within the menu selected with the Item button. See the following for information about the production codes. Pacmard sensor wires are damaged or disconnected.

HP LaserJet printers Computer-related introductions in The feeder will not appear in any control panel or PJL messages. Release the 4 clips from the fan ducting to provide clearance and remove the fan from the top of the printer see Figurecallout 2.

Try a new or known good Toner Cartridge. Serial Configuration Use RSC serial configuration when the printer is located 11 to 50 feet from the computer.

By using this site, you accept the Terms of Use and Rules of Participation. Because the slots are close together, we recommend installing them from right to left, starting with slot 1 and ending with slot 4. Slide the Thermoswitch off the fuser frame see Figurecallout 3.


Full text of “HP LaserJet 4 – 5 Service Manual”

The instructions shown here are not intended to replace these sources. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: This message is displayed when there is a request for manually fed media.

The Numeric pinter refers to the production number of the printer. A change in DC bias causes either more or less toner to be attracted to the drum, which in turn either increases or decreases the print density.

Your toner cartridge life depends on the amount of toner your j oh s require. It cannot be used to send a blank sheet of paper through the printer.

The purpose of the fusing system is to maintain a constant temperature on the fuser roller. Each tray has its own set of paper specifications. Power cycle the printer. The combinations for each cassette size are listed in Table You need not remove the MP Tray.

Solved: Windows 7 and HP LaserJet 4 Plus – HP Support Community –

Use the information that 4plhs with the printer drivers when installing the printer. Use this area of the self test to verify the installation of typeface cartridges, paper trays, and other installed options. The 5Si series were true workhorses, but initial packare were somewhat hobbled by a vulnerability to slightly low voltage i. The printer automatically processed the file in the highest resolution possible with the memory installed. The x indicates which SIMM slot generated the error.


When replacing the DC Controller, be sure to set the leading edge adjustment as shown in the following procedure. The DC Controller also shares machine status information pzckard the Formatter PCA so that proper diagnostic messages are displayed on the control panel.

From Wikipedia, the free encyclopedia. In a normal ardhived environment for example, a location with regulated temperature and humidity. To clear the display, you must remove the card, and power-cycle the printer.

If the HVPS has been removed and replaced, it may not be seated properly.