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DeskJet 9xx Maintenance and Troubleshooting
Cleaning
Backbone: Use water on a clean lint-free cloth. Dry carefully, parts left damp may rust.
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 not use solvents.
Pivot assembly: Use water on a clean lint-free cloth. Dry carefully.
Print cartridge contacts: Use water on a lint-free cloth.
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
IMPORTANT
Do not clean the following: Pinch rollers, drive belt, service station (except as otherwise noted), PCA and other electronics such as cables and motors.
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.
Cleaning (Duplexer)
Two-sided Printing Module: Check for ink on connector to module. If ink is present, wipe clean with a clean lint-free cloth.
6429927C
Lubrication (Carriage Rod)
Lubrication: Cleaning the Carriage Rod is not recommended. If, however, the Carriage 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 1 2 3 4 Models All All 93x,95x,96x,97x,99x All All All 92x,93x,94x,95x,97x All 92x,93x,94x,95x,97x All All 96x,99x 92x,93x,94x,95x,97x All All All 93x,95x,96x,97x,99x All except 92x 96x,99x 995 All 96x,99x 995 995 93x,95x,97x 96x,99x 995 995 What it Does Marketing Demo Memory Test (No print out) Calibration Page (OTOE auto pen alignment) Internal Self-Test Firmware Revision Code (No print out) Last Error Number (No print out) Manufacturing line test Infinite Hs 4x6 Manufacturing line test Paper Calibration Page Extended Self-Test (NVM dump) Paper Motor Calibration Procedure Toggle P1284 Kick (No print out) Level 1 Pen Recovery (Mini mop) (No print out) Level 2 Pen Recovery (Slow mop) (No print out) Level 3 Pen Recovery (Spit on wipers) (No print out) Pen Alignment Page Duplex Demo Skew Test Resets Device Name and PIN Code to defaults; resets access mode to Public; turns authentication and encryption OFF Dot Count and Low On Ink Status Report Pen ID Delete link keys for all bonded devices (resets bonding) Combined effect of 34 and 43 taps Photo Tray Calibration Nozzle Pattern Test Bluetooth Bonding: Enter Bluetooth bonding mode (scans for inquiries for 1 minute) Same as holding down the power button for 3 seconds. Bluetooth Reports: Print the Bluetooth Reports page. Same as holding down the cancel button for 3 seconds.
Cancel
Resume Power
5 6 7 8 9 11 12 14 15 20 21 22 30 31 32 34 41 42 43 44 66 84 90 91
Light Indications
PRINT CARTRIDGE RESUME POWER
INDICATOR LIGHTS
Light Indications
Print Cartridge Light Off Resume Light Off Power Light Off Condition Solution Check the following if caused by a printer hardware problem: Power Supply PCA, Cable Assy, Carriage PCA, Keypad Assy, Main Logic PCA,
Printer off or Printer in sleep mode. Ready for print job. Printer is busy receiving data or printing, or aborting print job/operation. Rear Cleanout or 2-Sided Printing Module not installed (except DJ 99xC printers) or 2-Sided Printing Module back door open. Except: DJ94x and DJ92x
Off Off
Off Off
On Blinking
Press the Power button to turn the printer on or "wake up" the printer. Send the printer a job. Wait for printer to complete print job. Install Rear Cleanout or 2Sided Printing Module or close rear door on 2-Sided Printing Module. If light indication continues, possible causes include: Rear Access Sensor on Logic PCA, Rear Access Flag on Upper Guide, Sensor on 2-Sided Printing Module, Interconnect. 1. Load paper and press the 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.
Off
On
On
If Power Light continues to blink, the Main Logic PCA may be faulty or there is a problem with the printer driver. Main Logic PCA, Interconnect, Rear Cleanout Flag on Upper Guide, 2-Sided Module PCA, 2Sided Module Flag or Rear Door.
Off
Blinking
On
1. Printer detects a paper out 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.
OOPS Flag, Pick Feed Roller, Feedroller Assy, In 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
Print Cartridge Light Off Resume Light Blinking Alternately Power Light Condition Solution Check the following if caused by a printer hardware problem: -In Tray, I/O Tray, Pick Feed Roller Assy, Feedroller Assy, OOPS Flag, DOOPS Flag, Pick 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 Encoder Strip, Turnaround Assy, Carriage PCA, Carriage Assy, Spot Detector, Main Logic PCA, Carriage Rod, Mech PPS Adjustment, Carriage Motor
Paper Stall Condition.
See the user guide that came with the printer to solve a paper stall condition.
Off
Blinking Simultaneously
Carriage Stall Condition
Blinking Alternately
Fatal Error (Assert Error Condition)
Open the Access Door and verify there is no obstruction blocking the Carriage path. Cycle power. For more information see the user guide that came with the printer. 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