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Quick reference service PIN code:
Table of contents
List of figures
List of tables
1 Product Information
2 Service approach
4 Maintenance
5 Theory of operation
6 Removal and replacement
7 Troubleshooting
8 Parts and diagrams
Index
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List of figures
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List of tables
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1 Product Information
Note
HP LaserJet 4100mfp (C9148A)
HP LaserJet 4101mfp (C9149A)
Product speed and throughput
Image quality
Paper handling
Copying capability
Expandable design
Table 1. Physical specifications
4100mfp (print unit, scan unit, and ADF unit)
Scan unit only
ADF unit only
Table 3. ADF/flatbed-unitacoustical specifications
Table 4. Skew specifications
Print unit
Tolerance
Cut paper
Table 5. Supported paper sizes and weights for the ADF
Size
Dimensions
Weight
Special considerations for ADF documents
Figure
Model and serial number label
Front view
Figure 2.Product parts (front view; right side)
Figure 3.Optical-unit lock (front view; left side)
Back view
Figure 4.Product parts (back view)
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2 Service approach
Major assemblies
Major assemblies
World Wide Web
HP support assistant CD-ROM
HP authorized resellers and support
HP service agreements
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3 Operation
CAUTION
General guidelines for using the ADF unit
Using the ADF
General guidelines for using the glass
Using the glass
Layout and operation
Control panel
Hint
Navigation
Figure 9.Navigation buttons
Walk-upcopy display
Figure 10. Top-level control-panelmenu display
Status bar
Configure device, diagnostic, and service menus
Menu map
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4 Maintenance
General guidelines
WARNING
and
Table 6. General cleaning guidelines
Part
Running the cleaning page
Cleaning the ADF delivery guide (clear mylar strip)
Figure 13. Open the delivery-guidecover
Figure 14. Remove the clear plastic sheet
Replace the clear, plastic sheet
Replacing
Table 7. User-replaceableparts
MFP Item
Procedure
Interval
Table 7. User-replaceableparts (continued)
Table 8. Print-unitmaintenance kit parts
RFU installation messages
Using HP Web JetAdmin (single update)
Using HP Web JetAdmin (multiple or unattended update)
Windows parallel connection (local printer)
Windows parallel connection (network printer)
RFU installation error messages
Performing hard-drivedisk initialization
Cold Reset
NVRAM initialization
Performing automatic Calibration
Figure 16. Sample calibration target page
Lead adjustment for the ADF
Center adjustment for the ADF
Leading-edgeadjustment for the glass
Side-edgeadjustment for the glass
5 Theory of operation
Document transportation process
Document exposure system
Light-conversionprocess
Figure 18. MFP block diagram
Scan-unitcomponents
Figure 19. Scan-unitcomponents
ADF components
Figure 20. ADF-unitcomponents
CPB terminology
Typical scanning-processflow
Copy processor board LEDs
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ADF motor circuit
Optical-unitmotor circuit
Scan-unit intake-fanmotor circuit
Scanner controller board connectors
Overcurrent and overvoltage protection
Power-supplyblock diagram
Optical unit
Figure 25. Optical unit block diagram
Scanning process
Inverter PCB
Scanning lamp
CCD driver PCB
Signal conversion
Overview
ADF cover sensor (PS10)
Document-detectsensor (PS2)
Leading-edgesensor (PS1)
ADF motor
Document pickup process
6 Removal and replacement
must
does not
Required tools
Before performing service
from the wall
Common fasteners
Table 12. Common fasteners found in the MFP
Illustration and description
Parts removal order
Table 13. Parts-removaltree
ADF input tray
Figure 29. Release the ADF input-trayhinge
Figure 30. Remove the ADF input tray
ADF pickup roller
Figure 31. Release the roller shield
Figure 32. Remove the roller shield
Figure 33. Remove the ADF pickup roller
ADF separation roller
Figure 34. Remove the ADF separation roller
ADF separation pad
Figure 35. Remove the ADF separation pad
Figure 36. Replace the ADF separation pad spring
ADF unit
Figure 37. Disconnect the cable
Figure 38. Remove the ADF unit
Control-paneldoor
Figure 39. Remove the print cartridge
Figure 40. Remove the control-panel wire-harnesscover
Figure 41. Disconnect the control-panelgrounding strip
Figure 42. Release the control-panel door-supportpins
Figure 43. Remove the control-paneldoor
Figure 44. Remove the product serial- and model-numberpanel
Scan-unit right-sidecover
Figure 45. Remove the right-sidecover screw
Figure 46. Remove the scan-unity right-sidecover
Disconnect the ADF cables
Figure 48. Disconnect the high-speedcopy connect cable
Scan-unit left-sidecover
Figure 49. Remove the left-sidescrew
Figure 50. Gently pry the top edge of the left-sidecover
Figure 51. Remove the scan-unit left-sidecover
Intake fan filter
Figure 52. Remove the intake filter
Formatter cage
Figure 53. Remove the formatter-cagecover
Figure 54. Slide the formatter cage toward the back of the product
Disconnect the formatter high-speedcopy connect cable
Scan unit
Figure 56. Secure the optical unit
Figure 57. Disconnect the CPB cable
Figure 58. Disconnect the scan unit cable
Figure 59. Remove the scan unit
Printing-unittop cover
Figure 60. Remove the top-cover rear-mountingscrews
Figure 61. Remove the printing-unittop cover
Glass
Remove the glass mounting screws
Remove the glass
Figure 64. Note the cable routing pattern
Remove the scanning lamp
Figure 66. Scanning-lampwire harness routing
Reinstall Note
Release the optical unit ribbon cable
Figure 68. Optical-unit ribbon-cableclip
Figure 69. Release the tension-springbracket
Figure 70. Remove the optical unit
Figure 71. Optical-unit drive-belttension bracket
Figure 72. Optical-unitribbon cable
ADF door open sensor (PS10)
Figure 73. Remove the ADF door open sensor
Optical-unitdrive gear/motor assembly
Figure 74. Remove the optical-unitcover plate
Figure 75. Remove the optical-unitdrive gear/motor assembly
Scan-unitpower supply
Figure 76. Remove the power-supplyshield
Figure 77. Remove the power supply
Figure 78. Remove the inverter PCB
Scanner controller PCB
Figure 79. Unplug the connectors
Figure 80. Grasp the scanner controller PCB
Figure 81. Remove the scanner controller
Intake fan
Figure 82. Remove the fan mounting screws
Figure 83. Remove the intake fan
Figure 84. Correctly orient the intake fan and bracket
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7 Troubleshooting
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Table 14. Primary steps for troubleshooting
Installation conditions
Media condition
Unit condition
Basic troubleshooting process flow
Basic troubleshooting
Table 15. Basic troubleshooting
Table 15. Basic troubleshooting (continued)
Power-ondefects
Table 16. Power malfunctions
Item
Solution
Print the event log
Interpret the event log
Display the event log
Control-panelmessages
Status messages
Warning messages
Error messages
Critical error messages
Table 18. Control-panelerror messages (continued)
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Copy processor board LEDs
Table 19. Troubleshooting copy processor board LEDs
Control panel display
MFP functionality
Action
(LJ4100mfp and
To print a paper-pathtest
To perform a diagnostic test
To access the service menu (PIN code: 04410002)
Jams
Table 21. General ADF jam troubleshooting
Cause
Clearing repeated ADF jams
Creating a customer print job
Configuration-pageelements
Figure 89. Sample configuration page
JetDirect-pageelements
Supplies-pageelements
Usage page
Figure 92. Sample usage page
File-directory-pageelements
Table 22. Image-qualitychecks
Image-qualitychecks
Checking the print cartridge
6000-page
full print cartridge weight
10,000-page
empty print cartridge weight
Image-defecttables
Table 23. Image defects
Problem
Condition
Table 23. Image defects (continued)
Use the straightest paper path
Isolate the source of the jam
Determine where media jams occur
Is the MFP is misfeeding or creating multifeed jams
Isolate a media brand
Isolate a media type
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8 Parts and diagrams
Parts
Related documentation and software
Support
Table 24. Technical support websites
Accessories
Table 25. Accessories and supplies
Part no
Product no
Consumables
Common hardware
Table 27. Screws used in the ADF unit and scan unit
HP Laserjet 4100 differences
Table 28. HP LaserJet 4100 differences
HP LaserJet
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Covers
Table 29. Covers
Part Number
Reference
Figure 96. Top-coverassembly
Table 30. Top-coverassembly
Scan unit (1 of 2)
Table 31. Scan unit (1 of 2)
Scan unit (2 of 2)
Table 32. Scan unit (2 of 2)
Figure 99. Glass, formatter, CPB, and cables
Table 33. Glass, formatter, CPB, high-speedcopy connect cable, and power cord
ADF unit (1 of 2)
Table 34. ADF unit (1 of 2)
ADF unit (2 of 2)
Table 35. ADF unit (2 of 2)
Table 36. Alphabetical parts list
Ref
Table 36. Alphabetical parts list (continued)
Table 37. Numerical parts list
Table 37. Numerical parts list (continued)
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Index