ADF door open sensor PS10

See Glass on page 92. 2 Unplug one connector (callout 1). 3 Remove one screw (callout 2). 4 Lift the ADF door sensor up, and remove it from the product. Figure 73. Remove the ADF door open sensor Figure 73. Remove the ADF door open sensor Reinstall Note When replacing the glass, verify that the sensor switch pin freely moves in the hole through the glass mounting frame. Anytime the glass is removed and replaced, calibrate the ADF scan unit. See Calibration on page 47.

Numerical parts list

Formatter assembly, 4100mfp and 4101mfp without hard disk, DIMMS, or JetDirect card Copy processor board (CPB) with faceplate Power cable jumper (scan unit to print unit Cable guide (for the scanning lamp cable) Plate, Guide lower (optic unit ribbon cable Plate, Guide upper (optic unit ribbon cable ADF door-open sensor assembly (PS10) Scan-unit motor assembly (optic unit drive Optical unit (comes with the scanning lamp and ribbon cable) Pulley, carriage assembly (optic-unit drive-belt tension...

Replacing userreplaceable parts

To ensure that the product maintains optimal performance, replace certain parts when the Perform Printer Maintenance message appears on the product control-panel display. The maintenance message appears every 200,000 pages (default setting). To check the number of pages the product has printed, either print a configuration page or a supplies status page. See Evaluate the information pages on page 130. Hint To order a print-unit maintenance kit, see the HP LaserJet 4100 series printer service...

Parts lists and diagrams

Laserjet Memory Card

Optical unit (comes with the scanning lamp and ribbon cable) Spring, Tension (tension spring for optic-unit drive belt) Pulley, carriage assembly (optic-unit drive-belt tension bracket) ADF door-open sensor assembly (PS10) Scan-unit motor assembly (optic unit drive gear motor) Power supply with veristor cover (does not include top shield) Cable guide (for the scanning lamp cable) Veristor-cover (in the power supply) Plate, guide upper (optic unit ribbon cable clip) Plate, guide lower (optic...

Copy processor board LEDs

The CPB has four light-emitting diodes (LEDs) that can be viewed when you face the back of the MFP (callout 1). These LEDs illuminate in specific patterns depending on the CPB status during initialization (initialization occurs when power to the MFP is turned on). After initialization, the LEDs can be used to troubleshoot the CPB (see Troubleshooting with the copy processor board on page 124).The table in this section describes the LED pattern sequences during the first and second stage of CPB...

Troubleshooting with the copy processor board

The table in this section is a quick reference source for troubleshooting common copy processor board CPB failures that might occur after or during CPB initialization. The LED pattern column describes the status of the four LEDs located on the back of the MFP. The control-panel display column lists the messages that appear on the control-panel display when a failure occurs. The MFP functionality column describes what MFP functions are affected by the CPB failure. The action column lists the...