Disconnect the control-panel grounding strip | HP 4101mfp specification

5Remove one screw (callout 4), and disconnect the top edge of the grounding strip.

4

Figure 41. Disconnect the control-panel grounding strip

6Disconnect the control-panel-cable connector (callout 5).

7Separate the door-support pins (callout 6) to release them.

5

6

Figure 42. Release the control-panel door-support pins

80 Removal and replacement

C9148-90909

Image 82

HP 4101mfp manual Disconnect the control-panel grounding strip

Contents

Service addendum Page Service addendum Quick reference service PIN code Table of contents Maintenance Removal and replacement Troubleshooting Index Table of contents C9148-90909 List of figures List of figures C9148-90909 List of tables List of tables C9148-90909 Product Information HP LaserJet 4100mfp C9148A Product configurationsIntroduction HP LaserJet 4101mfp C9149A Image quality Product featuresProduct speed and throughput Paper handling Expandable design Product specificationsPerformance Category Specification Scan unit only Testing per International Standard Organization ISO ADF/flatbed-unit acoustical specificationsCategory Specification Skew specifications Size Dimensions Weight Media specificationsSupported paper sizes and weights for the ADF Special considerations for ADF documents Model and serial numbers Product overview Front view Back view Product parts back view Product Information C9148-90909 Service approach Service approach Major assemblies World Wide Web HP service agreementsContact HP HP support assistant CD-ROM Service approach C9148-90909 Operation General guidelines for using the ADF unit Using the ADF unitUsing the ADF General guidelines for using the glass Using the glassUsing the glass Layout and operation Using the control panelControl panel Walk-up copy display NavigationStatus bar Configure device, diagnostic, and service menus Menus Menu map MFP menu map 1 MFP menu map 2 Maintenance Cleaning the product General guidelines Running the cleaning Cleaning the ADF delivery guide clear mylar strip Remove the clear plastic sheet Replace the clear, plastic sheet User-replaceable parts MFP Item Procedure Interval User-replaceable parts Processor board on See Back view onBack view on RFU installation messages Downloading a remote firmware updateInstalling the update Updating product firmware Using HP Web JetAdmin single update Using HP Web JetAdmin multiple or unattended update Windows parallel connection local printer Windows parallel connection network printer Troubleshooting RFU installation RFU installation error messages Cold Reset Performing hard-drive disk initialization Configuration page see Evaluate the information pages on Nvram initialization Calibration Performing automatic Calibration Lead adjustment for the ADF Performing manual calibration Center adjustment for the ADF Leading-edge adjustment for the glass Side-edge adjustment for the glass Theory of operation Document transportation process OverviewDocument exposure system Light-conversion process MFP block diagram General descriptions Scan-unit components Scan-unit components ADF components ADF-unit components Copy processor board CPB terminology Typical scanning-process flow Copy processor board LEDs HP LaserJet 9000mfp LED pattern CPB status OFF OFF on on Optical-unit motor circuit Scanner controller boardADF motor circuit Scan-unit intake-fan motor circuit Scanner controller board connectors Glass. See Glass on Overcurrent and overvoltage protection Power supplyIntermediate PCB Low-voltage components Power-supply block diagram Power-supply block diagram Optical unit block diagram Optical unit Scanning lamp Inverter PCBCCD driver PCB ADF document-feed system Overview Scan-unit intake fan Removal and replacement After performing service Removal and replacement strategyBefore performing service Required tools Common fasteners Parts removal order Parts-removal tree ADF input tray Release the ADF input-tray hinge ADF pickup roller Release the roller shield Remove the ADF pickup roller ADF separation roller Remove the ADF separation roller ADF separation pad Remove the ADF separation pad ADF unit Disconnect the cable Assemblies and covers Control-panel door Disconnect the control-panel grounding strip Remove the control-panel door Scan-unit right-side cover Remove the right-side cover screw Disconnect the ADF cables Disconnect the high-speed copy connect cable Scan-unit left-side cover Remove the left-side screw Remove the scan-unit left-side cover Intake fan filter Remove the intake filter Formatter cage Remove the formatter-cage cover Disconnect the formatter high-speed copy connect cable Then slide it forward Scan unit Secure the optical unit Disconnect the scan unit cable Printing-unit top cover Remove the top-cover rear-mounting screws Glass Remove the glass mounting screws Fingerprints will affect print quality Scanning-lamp wire harness routing Remove the scanning lamp Release the optical unit ribbon cable Optical-unit ribbon-cable clip Release the tension-spring bracket Optical-unit drive-belt tension bracket ADF door open sensor PS10 Remove the ADF door open sensor Optical-unit drive gear/motor assembly Remove the optical-unit cover plate Remove the optical-unit drive gear/motor assembly Scan-unit power supply Remove the power-supply shield Remove the power supply Remove the inverter PCB Unplug the connectors Scanner controller PCB Grasp the scanner controller PCB Intake fan Remove the fan mounting screws Remove the intake fan Removal and replacement C9148-90909 Troubleshooting Wiring diagrams Troubleshooting C9148-90909 Troubleshooting process Primary steps for troubleshooting Media condition Installation conditionsPreliminary operating checks Unit condition Basic troubleshooting process flow Basic troubleshooting flowchart Is Power On Basic troubleshootingBasic troubleshooting Successful? Is the copy function Operational? Power-on defects Power malfunctions Solution Event log Troubleshooting with the control panelControl-panel display Print the event log Interpret the event log Sample MFP event-log Display the event log Control-panel display of the event log Control-panel messages See Formatter cage on Troubleshooting with the copy processorUpdate on Board on Unit intake fan on Connectors onDiagnostic tests on See Scanner controller board Jams on Scanner controller board connectors onSee Inverter PCB on Freely see ADF components on Troubleshooting with the copy processor board Copy processor board LEDs Troubleshooting C9148-90909 Supply on page 63 and Power-on See Basic troubleshooting on114 and Power-on defects on Defects on To perform a diagnostic test User-level and service-level diagnosticsDiagnostic tests ADF paper-path test To access the service menu PIN code Service-level diagnosticsService menu Service menu Description General ADF jam troubleshooting Cause Solution Jam troubleshootingJams Clearing repeated ADF jams Creating a customer print job Configuration-page elements ConfigurationEvaluate the information pages Sample configuration JetDirect JetDirect-page elements Supplies status Supplies-page elements Usage Sample usage File directory File-directory-page elements Image-quality checks Action Image-formation troubleshootingImage-quality checks Standards? Checking the print cartridge EconoMode Image defects Problem Condition Solution Image-defect tables Clear mylar strip on See Cleaning the ADF delivery guideStrip. See Cleaning the product on Vertical lines Media troubleshooting Isolate a paper path Isolate a media brand Isolate a media type Wiring diagrams Parts and diagrams Related documentation and software Ordering parts, supplies and getting supportParts Support Accessories and supplies Description Product no AccessoriesConsumables Description Product no HP Laserjet 4100 differences See Top-cover assembly onCommon hardware Screws used in the ADF unit and scan unit Description How to use the parts lists and diagrams Parts lists and diagrams Covers Covers Part Number Description Reference Top-cover assembly Top-cover assembly Part Number Description Reference Scan unit 1 Scan unit 1 Part Number Description Reference Scan unit 2 Scan unit 2 Part Number Description Reference Glass, formatter, CPB, and cables See Accessories and supplies on ADF unit 1 ADF unit 1 Part Number Description Reference ADF unit 2 ADF unit 2 Part Number Description Reference Alphabetical parts list Alphabetical parts list Part Number Description Spring, Tension tension spring for optic-unit Numerical parts list Numerical parts list Part Number Description ADF unit entire assembly Does not include Parts and diagrams C9148-90909 Index Index C9148-90909 C9148-90909 Index RAM Sram Index C9148-90909 Page C9148-90909