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DeskJet 9xx Maintenance and Troubleshooting

1. Print Resume Power Condition Solution Check the following if caused by a printer Cartridge Light Light hardware problem Light Off Blinking Paper Stall Condition See the user guide that came In Tray I O Tray Pick Feed Roller Assy Alternately with the printer to solve a paper Feedroller Assy OOPS Flag DOOPS Flag Pick stall condition Cam Gear Pinch Rollers Lower Paper Guide Rear Access Cleanout Kicker 2 Sided Printing Module Shifter Spring Separator Paper Motor Paper Motor Belt Paper Motor Encoder Off Blinking Carriage Stall Condition Open the Access Door and Encoder Strip Turnaround Assy Carriage PCA Simultaneously verify there is no obstruction Carriage Assy Spot Detector Main Logic PCA blocking the Carriage path Carriage Rod Mech PPS Adjustment Carriage Cycle power For more Motor information see the user guide that came with the printer Blinking Alternately Fatal Error Assert Error Condition Turn off the printer then turn the printer back on If the error reappears press the resume button and see Error Codes for determining probable cause of error condition Main Logic PCA Carriage PCA Cable Assy Power Supply PCA Mechanism Binding
2. PCA may be faulty or there is a problem with the job operation printer driver Off On On Rear Cleanout or 2 Sided Install Rear Cleanout or 2 Main Logic PCA Interconnect Rear Cleanout Printing Module not installed Sided Printing Module or close Flag on Upper Guide 2 Sided Module PCA 2 except DJ 99xC printers or rear door on 2 Sided Printing Sided Module Flag or Rear Door 2 Sided Printing Module back Module door open light indication continues Except DJ94x and DJ92x possible causes include Rear Access Sensor on Logic PCA Rear Access Flag on Upper Guide Sensor on 2 Sided Printing Module Interconnect Off Blinking On 1 Printer detects a paper out 1 Load paper and press the OOPS Flag Pick Feed Roller Feedroller Assy In condition 2 Printer detects a paper jam 3 Printer ready to eject banner paper 4 Timeout waiting for data 5 Printer in wait state to allow ink to dry Resume button 2 Remove paper jam and press the Resume button 3 Press the Resume button to eject banner paper 4 Press the Resume button to eject sheet 5 Wait for end of wait state Otherwise press the Resume or Power button Tray I O Assy 2 Sided Printing Module Rear Cleanout Assy Paper Motor Paper Motor Belt Encoder Disk Cam Gear Pinch Rollers Main Logic PCA Carriage PCA Lower Paper Guide Upper Paper Guide Inner Paper Guide Kicker Assy Separator Pad Paper Pusher Light Indications
3. Rod was wiped clean replace the felt washers on the Carriage Assembly The Felt Washers are impregnated with oil to provide the necessary lubrication for the Carriage Rod 6429924C Front Panel Internal Self Tests Listed below are the Front Panel Internal Self Tests also known as Tap Tests supported by DeskJet 9xx Printer Family firmware and what they do All tap tests are invoked by holding the power button down while pressing the resume button the specified number of times The cancel button equals ten button presses so if you need to do a 41 tap test for example hold the power button down while pressing the cancel button four times and the resume button once Taps Models What it Does 1 All Marketing Demo 2 Al Memory Test No print out 3 93x 95x 96x 97x 99x Calibration Page OTOE auto pen alignment 4 Al Internal Self Test Cancel Resume Power 5 Al Firmware Revision Code No print out 6 All Last Error Number No print out 7 92x 93x 94x 95x 97x Manufacturing line test 8 All Infinite Hs 9 92x 932 942 95X 97X 4x6 Manufacturing line test 11 Al Paper Calibration Page 12 Al Extended Self Test NVM dump 14 96x 99x Paper Motor Calibration Procedure 15 92x 93x 94x 95x 97x Toggle P1284 Kick No print out 20 AI Level 1 Pen Recovery Mini mop No print out 21 Al Level 2 Pen Recovery Slow mop No print out 22 All Leve
4. Deskjet 9xx Maintenance and Troubleshooting Cleaning Carriage rod Cleaning is not recommended If extremely dirty wipe with a clean lint free cloth Use no water or solvents Encoder strip Wipe left to right viewed from front with a clean lint free cloth Do not pull hard on the strip Drive roller Use water on a clean lint free cloth Do Backbone Use water on a clean lint free cloth Dry carefully parts left damp may rust Pivot assembly Use water ona clean lint free cloth Dry carefully Print cartridge contacts Use water on a lint free cloth IMPORTANT Do not clean the following Pinch rollers drive belt service station except as otherwise Bonnet Use a dry cotton swab only If deposits are bad in the wiper scraper area use water or alcohol on the cotton swab Replace wiper assembly in all repairs noted PCA and other electronics such as cables and motors Case Parts Use mild detergents such as PK 200 or Simple Green with water on a clean lint free cloth Solvents and water on a clean lint free cloth can be used to remove stubborn fingerprints etc on external case parts Paper dust It is recommended that vacuuming be used to remove paper dust from inside the printer not compressed air 6429921C Cleaning Duplexer Lubrication Carriage Rod Lubrication Cleaning the Carriage Rod is not recommended If however the Carriage
5. l 3 Pen Recovery Spit on wipers No print out 30 93x 95x 96X 97X 99X Pen Alignment Page 31 All except 92x Duplex Demo 32 96x 99x Skew Test 34 995 Resets Device Name and PIN Code to defaults resets access mode to Public turns authentication and encryption OFF 41 All Dot Count and Low On Ink Status Report 42 96x 99x Pen ID 43 995 Delete link keys for all bonded devices resets bonding 44 995 Combined effect of 34 and 43 taps 66 93x 95x 97x Photo Tray Calibration 84 96x 99x Nozzle Pattern Test 90 995 Bluetooth Bonding Enter Bluetooth bonding mode scans for inquiries for 1 minute Same as holding dovvn the povver button for 3 seconds 91 995 Bluetooth Reports Print the Bluetooth Reports page Same as holding down the cancel button for 3 seconds Light Indications PRINT CARTRIDGE RESUME POWER 9 00 INDICATOR LIGHTS Light Indications Print Resume Power Condition Solution Check the following if caused by a printer Cartridge Light Light hardware problem Light Off Off Off Printer off or Printer in sleep Press the Power button to turn Power Supply PCA Cable Assy Carriage PCA mode the printer on or wake up the Keypad Assy Main Logic PCA printer Off Off On Ready for print job Send the printer a job Off Off Blinking Printer is busy receiving data or Wait for printer to complete If Power Light continues to blink the Main Logic printing or aborting print print job

DeskJet 9xx Maintenance and Troubleshooting

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