Text preview for : dj9xxchk.pdf part of hp Deskjet 9xx Deskjet 9xx disassembly/maintenance



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For all 9xx printers

Check the Print Cartridges
Verify that the rear access cleanout or 2 sided printing module is installed Plug in the printer. Turn on the printer. Open the access door and the carriage will move to the center. Verify the print cartridges are installed. Verify the print cartridges are OK by noting the icon they point to. If a problem is indicated, verify that the correct print cartridges are installed. If a problem is indicated, verify that all tape has been removed from the print cartridges.

Access Door Encoder Strip 2 Sided Printing Module Print cartridges OK Black print cartridge low on ink Color print cartridge low on ink Problem with black print cartridge Problem with color print cartridge Print Cartridge Light Resume Light Power Light

Rear Access Cleanout Assemby

Output Tray Input Tray

Power Button Resume Button Cancel Button Length Adjuster Width Adjuster

Check the Printer

Pull out the input tray and remove any paper. Remove the rear access cleanout or 2 sided printing module. Look for a paper jam between the rubber rollers. Remove any paper that may have jammed in the rollers both in back and in front of the printer. Re-inst the rear access cleanout or 2 sided printing module, ensuring it is fully locked into position. all

Check the Self-Test Print Out
Load paper correctly, set length and width adjusters. Close the access door. Ensure the input tray is pushed into the printer all the way. Plug in the printer and turn it on. Power light should be on. Create a self test. 1. Press and hold the (Power) button 2. Press the (Resume) button 3. Release the (Power) button. Watch the printer for smooth paper feed and check the output for missing nozzles. (incomplete text or graphics) If attached, test the 2 sided printing module. 1. Press and hold the (Power) button 2. Press the (Cancel) button 3 times 3. Press the (Resume) button once 4. Release the (Power) button
If you successfully printed a self-test page with good print quality, the printer is OK. If not, the easy steps listed in Section 4 often solve the problem.

For all 9xx printers

Poor Print Quality?
Printout has fine ink streaks. Printout has fine white lines. Check the print cartridge nozzles for ink and debris. Clean the nozzles using a lint Free swab moistened with distilled water. Connect the printer to a host PC and execute the cleaning routine found in the "Printer Services" tab in the "HP DeskJet Series Toolbox"

Printer Does Not Print?
Printer has no power. Printer feeds paper but does not print. Power light on, but does not print. Remove power from the printer for 15 seconds and restore power. Ensure the Power cord is firmly plugged into the printer and an active power source. Turn the printer off and on twice. Connect the printer to a host PC and execute the cleaning routine found in the "Printer Services" tab in the "HP DeskJet Series Toolbox". Open the access door and verify the carriage moves and points to the If the carriages points at the If the carriage points at the The paper doesn't move, and the resume light blinks, but does not print. Lights blink alternately, but does not print. Prints a single character and ejects paper. Power and Resume lights are on steadily or or icon.

icon, replace the color print cartridge. icon, replace the black print cartridge.

Ensure that the correct print cartridges are installed in the printer. Check that the proper media (paper) is loaded and press the Resume (center) Button to tell the printer to pick paper again. Try using a larger stack of paper. This error can be caused by a paper jam, wrong printer driver, or bad computer to printer connection. Ensure the carriage movement is not blocked. This error can be caused by a defective computer, wrong printer driver, or bad interface cable. Make sure the access door or 2-sided printing module (duplexer) is fully closed

Paper Feed Problems?
No paper feed from the input tray. Ensure the input tray is not overloaded. Load a few sheets to the input tray to test the paper path. Ensure the input tray is fully forward (inserted). Pull the input tray out and push it back in. Note that the last few inches of the tray should be automatically pulled in by the printer if there are no obstructions. Ensure the length adjuster is all the way forward and touching the paper. Ensure the paper is under the tab on the length adjuster. Paper partially ejected and the Remove the rear access cleanout or the 2 sided printing module and pull out any lights are flashing. damaged (curled/wrinkled) paper from between the rollers. Ensure paper is properly loaded in the input tray and press the Resume (center) button. Does not eject paper fully or Press the Resume (center) button to eject the paper and re- initiate a paper pick. delays ejecting the paper. Turn the printer and computer on in proper sequence as prescribed by the computer manual. Feeds multiple sheets. Ensure the paper is not stuck together and meets the user manual specifications. Fan the paper to free any attached sheets. Ensure the input tray is not overloaded and contains the same type, size and weight of media. Envelopes will not feed. Ensure only one envelope is inserted into the single feed slot on the output tray. Ensure envelopes have no bends or curls. Ensure envelopes are not overloaded. Paper feed problems with Open the 2 -sided printing module door and verify there are no obstructions in the 2-sided printing module. paper path or excessive ink on the rollers. Remove and firmly re-install the 2-sided printing module, making sure that it is fully seated in the printer.
Rev 0209