deskjet 9xx service manual
Contents
1. back and litt out 20 DeskJet 9xx Disassembly Procedures Inner Paper Guide Upper Paper Guide i 2 de Deflect tab on right side of Inner Paper Guide Assembly Slide assembly to the left and lift out Remove Pinch Springs which secure Upper Paper Guide Use caution when handling the Upper Paper Guide it breaks easily Pull Upper Paper Guide backwards until it drops free of Upper Paper Guide Hanger and remove DeskJet 9xx Disassembly Procedures 1 Twist and lift out DOOPS Flag from Upper Paper Guide 2 Rotate OOPS Flag downward and lift out gently 3 Slide Pinch Rollers sideways and lift them out of guide 22 DeskJet 9xx Disassembly Procedures Feedroller Assembly Grasp Caber Pin with needle nose pliers and pull it forward until it snaps out Lift out Shifter Spring Release left Polar Bearing by rotating it forward Release right Polar Bearing using screwdriver _ Lift out Feedroller Assembly Q A UN Snap Pivot away from Feedroller If necessary remove Encoder Disk by peeling it off Note The Encoder Disk is a one time use part If removed it must be replaced 23 DeskJet 9xx Disassembly Procedures Paper Drive 1 Detach Lifter Spring from Chassis 2 Detlect side latch and pull off Kick Cam 3 Litt off Feedroller Idler Gear 4 Rotate Pressure Plate Lever upwards to lift out 5 Raise side tab on Separator Lifter sli2. to release then remove module and cable 4 Release inner tab and pull out Keypad from Top Case 5 Detach the cable trom Keypad DeskJet 9xx Disassembly Procedures Remove two Side case Screws from Top Case on the top of the unit Press two front latches forward to free them 2 3 4 a Deflect two back latches on Chassis Lift off the Top Case Remove the Cover Connector DeskJet 9xx Disassembly Procedures BOND 5 Use a screwdriver to pry the latch to release the IR Port Release the IR port and slide the port from the Lower Right Case Disconnect the IR PCA from the Cable Harness Slide the unit over edge of table so that the Lower Right Case is suspended Release the front latch by deflecting it away from the Chassis with a screwdriver inserted through the bottom slot then rotate the front of the case away from the unit Release back latch by deflecting it away from Chassis with a screwdriver Rotate the Lower Right Case away from the Chassis Repeat steps 4 and 5 for Lower Left Case DeskJet 9xx Disassembly Procedures Business Tray Frame Assembly 1 Rotate unit upwards so it rests on its back 2 Use screwdriver inserted through slot in bottom of Left Cheek to deflect latch away from the chassis At the same time pull the Left Cheek upward and away from unit DeskJet 9xx Disassembly Procedures Input Tray 1 Remove any paper in the Input Tr
3. Carriage Rod out of Carriage Assembly Remove two Rod Mount Clips by rotating them 90 degrees and removing them trom Chassis 7 The Encoder Spring will detach when Carriage Rod is removed Pull spring away from Chassis to release tabs NO Oo OB W DeskJet 9xx Disassembly Procedures Carriage Assembly Remove Belt Tension Spring to slip Carriage Belt off of Chassis Feed Flex Head Driver Cable through Backbone from back to front Flex cable to free tabs from Backbone Remove Carriage Assembly e Na DeskJet 9xx Disassembly Procedures 1 Flex cable to remove from tabs on Carriage Assembly then disconnect cable from Carriage PCA and Slider Flex Belt to remove it from Belt Attach Base not shown 2 Remove two screws connecting Slider to Carriage Assembly 3 Remove three screws securing Belt Attach Assembly to Carriage Assembly and then remove Belt Attach Assembly Remove Belt Attach Tower from base Remove Belt Attach Beam from tower 4 Carriage PCA will be released when Belt Attach Assembly is removed Lift it away 5 Remove ESD Springs from blades 6 Remove Felt Retainer by prying it away with knife or sharp object Remove Felt Lubrication DeskJet 9xx Disassembly Procedures Carriage Motor Assembly Turnaround Assembly 1 Remove two screws which secure Carriage Motor to Backbone 2 Litt out Carriage Motor 3 Slide Turnaround Assembly to the lett while depressing tab on
4. DeskJet 9xx Disassembly Procedures TABLE OF CONTENTS o haat Bash BUSINES SPRAY FRAME A SSEMBI re das 4 INPUT RANE saa eure cise A a Roar a ale tral tah lee hat alee NS Nala ceo ate 5 Ea A A a a sad A 7 A AS E E HO REP OORT PONE PEI A 9 WING FRAMES AND PABER PUSHER tn atch tush era cedo cena ee co o pl a 0 POWTER la pom bunat E at aauts 11 O A RNR Seat EERE AL GOES E IS RAR NG ER RIES aR OTD Iee 13 BA A ARNE PINEA II ANT 14 PICK FEEDROLLER ASSEMBLY a A dico 5 SPOT SENSOR ASSEMBLY NOT APPLICABLE FOR 94X amp Q2X oo ceccccec cece ccc eeece sete eeee ees 16 ENCODER STRIP CARRIAGE as das iz CARRIAGE ASSEMBLY ninne e N A TE A cits pe kl beaut ts 18 CARRIAGE MOTOR ASSEMBLY TURNAROUND ASSEMBLY 00cccseeeeeeeeeeeceseeeeeeens 20 INNER PAPER GUIDE UPPER PAPER GUIDE 00 cccecceceeeeeceeececeueceesueeecssneeenans 2 A O in CUaed Restle 23 PAPER IRI couch Sol AN Chu eee cese bridas dr a ues e Puta la abate buss taki aba e Guay toms oe 24 LOWER PAPER GUDE tS dl oat tcc ta aba ies 25 E A E S EE A A O 26 HUM INTERCONNECT PEA na dista 27 AA ONEA E E A E 28 DeskJet 9xx Disassembly Procedures Case Parts 1 Remove the Rear Cleanout 2 litt Access Door Assembly into a vertical position and pull upwards to remove it 3 Release inner tab and remove Nameplate from Top Case For 995 series Release Bluetooth Module from Top Case by pushing on inner tab At the far end of the Bluetooth cable pinch connector
5. assembly Procedures Cable Harness Facing the back of the unit free Cable Harness Assembly from right side of unit Disconnect cable from Carriage Motor and Main PCA Disconnect cable from Humidity PCA and Power Supply PCA Disconnect cable from Service Station Motor and Chassis Lift away Cable Harness Assembly OR WN Note Handle connectors rather than wires when disconnecting Cable Harness Assembly DeskJet 9xx Disassembly Procedures Wing Frames and Paper Pusher 1 Release the two tabs that connect the Right Wingtrame Assembly to the Chassis Lift Wingframe up and away 2 Repeat steps for Lett Wingframe Assembly 3 Release tab and remove Pin Linkage Assembly that connects Pick Gear to Paper Pusher Assembly by sliding it to the left 4 Raise and lift out Paper Pusher DeskJet 9xx Disassembly Procedures Power Supply 1 Rotate printer so that you are facing the back of the unit Make sure that Power Cord is disconnected at this time because there may be dangerous voltage applied Use slip joint or needle nose pliers fo squeeze in plastic latches on either side of the AC Connector to release cable from IEC Bracket 2 Remove Power Supply PCA mounting screw 3 Release tab connecting Housing to Backbone by pressing it in with a screwdriver trom the opposite side of the printer Slide Housing fo the right and litt out DeskJet 9xx Disassembly Procedures 1 Deflect tab on lett side
6. ay Assembly and raise Business Tray Cover 2 Extend Input Tray Assembly as far as it will go Press tab on Input Tray Assembly 3 Remove tray from the printer DeskJet 9xx Disassembly Procedures Slide Assembly Width Adjuster to far right Lift up top end of Width Adjuster so that it clears the lip of the tray Continue pushing the lifted assembly to the right to remove it from the tray Slide Length Adjuster towards the back of the tray until it is positioned halfway between the front and back Then remove Length Adjuster by lifting up its back edge with a screwdriver while pushing it into the tray Continue to push until it clears the tray DeskJet 9xx Disassembly Procedures Paper Motor Disconnect Cable Harness from Paper Motor Drive and Paper Encoder PCA Remove Cable tie by compressing with needle nose pliers Remove screw that holds Paper Motor Drive Assembly in place Release the bearing connecting Paper Motor Drive to Feedroller Assembly by rotating it forward to unlatch it 5 Litt Paper Motor Drive Assembly out of Chassis E GN DeskJet 9xx Disassembly Procedures 1 Remove T 8 Taptite Screw which secures Encoder PCA to assembly Lift off Encoder Guide and PCA 2 Remove the two T 8 Screws holding the Paper Motor Assembly to the Motor Bracket Remove Paper Motor and Idler Assembly 3 Remove the Paper Belt 4 Remove the Stealth Cluster Gear DeskJet 9xx Dis
7. de to the left then lift out 24 DeskJet 9xx Disassembly Procedures Lower Paper Guide To free Lower Paper Guide deflect latches on both sides with a screwdriver _ Tilt Lower Paper Guide backward and lift it out _ Lift out Separator Pad _ Lift out Separator Peg Remove Spring from Peg _ Lift out Rear Rollers and remove Rear Roller Springs Rotate Kicker and flex around tab to lift out NOOR WN 23 DeskJet 9xx Disassembly Procedures Chassis Assembly Remove one screw on right side and two screws on vertical face which secures the Backbone Tilt and lift away Backbone Remove four screws black and silver taptite on top of Backbone to remove Upper Rail Remove two screws securing IEC Bracket and Cleanout Flag Stop from Upper Paper Guide Hanger _ Lift and flex Upper Paper Guide Hanger to remove it from Chassis 26 DeskJet 9xx Disassembly Procedures Humidity Interconnect PCA 1 Remove screw which connects Humidity Interconnect PCA to Chassis and remove PGA 2 DeskJet 9xx Disassembly Procedures Service Station Deflect tab on right and lift out Service Station 2 Pry out Grounding Clip from the Chassis using a small screwdriver l 28
8. of Power Supply Housing 2 Slide Power Supply PCA out of Housing DeskJet 9xx Disassembly Procedures Main PCA ls Detach Flex Head Driver Cable from Main PCA 2 Remove two screws 3 Litt out Main PCA Assembly DeskJet 9xx Disassembly Procedures Bead Ferrite 1 Deflect tab which holds Ferrite Clip in place 2 Push Clip through to other side of unit and remove it 3 Slide Ferrite off of Flex Head Driver Cable DeskJet 9xx Disassembly Procedures Pick Feedroller Assembly 1 Press tabs on the top and bottom of Gear Gaurd to rock it out of the slot 2 Remove Gear Gaurd 3 Rotate Polar Bearing on right side forward to release Rotate Polar Bearing on left side forward by reaching through Chassis 4 Lift out Pick Feedroller Assembly DeskJet 9xx Disassembly Procedures Spot Sensor Assembly not applicable for 94x amp 92x 1 Remove screw which secures ESD Cover to Carriage Assembly 2 Disconnect Spot Assembly Cable from Carriage PCA 3 Unplug Spot Assembly Cable from Spot Sensor Assembly DeskJet 9xx Disassembly Procedures Encoder Strip Carriage Rod 1 Release Encoder Strip from catch on right end of Chassis Release from Encoder Spring on left end of Chassis and remove from Carriage Assembly Remove two Special Screws which hold the Carriage Rod to the Chassis Push Carriage Rod to right to release it from Backbone and lift it out Slide
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