Printer Hangs at Calibration

Upon power-up the printer will count memory and then start Calibration. Calibration will be ongoing and eventually printer will quit but a message Performing Calibration will be displayed on the control panel.

To troubleshoot this issue start with bypassing calibration at power-up. Perform the following:
Turn the printer on and watch the control panel display.
When the display begins showing the memory count, press and hold (down arrow) until all three lights on the control panel are lit.
Press (up arrow).
Press MENU. The display should show SKIP DISK LOAD.
Press (up arrow) until SKIP CALIBRATION is highlighted.
Press (select button). The printer will skip calibration and then continue it power-on sequence.

When the printer comes to a READY state, enter the DIAGNOSTICS menu.
Select COMPONENT TEST
Scroll down and select BLACK LASER SCANNER. Press the check mark button to execute test. Test should run approximately 10 seconds in a good working printer. If the printer is not functioning correctly the laser scanner may not run, or it may run for approximately 5 seconds and abort.
Continue testing other laser scanners, CYAN, MAGENTA, YELLOW.

If scanners fail, the problem could be related to the laser scanner assembly, laser scanner cable, DC controller. When dispatching service, advise the technician to remove the top cover of printer and examine the scanner cable from the scanner assembly to the DC controller. This cable is connected at J1022 on the DC Controller. If cable is pinched under top cover you will encounter this symptom of the printer hanging at calibration.

To troubleshoot this issue start with bypassing calibration at power-up. Perform the following:
Turn the printer on and watch the control panel display.
When the display begins showing the memory count, press and hold (down arrow) until all three lights on the control panel are lit.
Press (up arrow).
Press MENU. The display should show SKIP DISK LOAD.
Press (up arrow) until SKIP CALIBRATION is highlighted.
Press (select button). The printer will skip calibration and then continue it power-on sequence.

When the printer comes to a READY state, enter the DIAGNOSTICS menu.
Select COMPONENT TEST
Scroll down and select BLACK LASER SCANNER. Press the check mark button to execute test. Test should run approximately 10 seconds in a good working printer. If the printer is not functioning correctly the laser scanner may not run, or it may run for approximately 5 seconds and abort.
Continue testing other laser scanners, CYAN, MAGENTA, YELLOW.

If scanners fail, the problem could be related to the laser scanner assembly, laser scanner cable, DC controller. Remove the top cover of printer and examine the scanner cable from the scanner assembly to the DC controller. This cable is connected at J1022 on the DC Controller. If the cable is pinched under top cover the printer may hang at calibration.

Transfer unit removal

Open the front door
Hold the blue handles on both sides of the transfer unit.
With your right thumb, press and hold the lever on the right side handle then lift the handle up, followed by the left side to remove the unit.

NOTE: Reassembly note: When reinstalling the transfer unit, align the two pins on the left side of the door with the two holes in the left side of the transfer unit.

Print cartridge removal

Open the front door.
Grasp the blue handle of a cartridge and pull it slightly upward and out to remove it.

NOTE: When performing any servicing inside the printer, all four print cartridges should be removed.

Do not touch the surface of the print cartridge drum. The cartridges have flaps that close when the front door is opened to protect the print drum. However, if the flaps do not close, flip them down to cover the exposed area of the print drum.

Right Cover Removal

Open the rear output bin and the upper rear door.
Remove three screws (callout 1 in figure below).
Pull down and out on the bottom edge of the cover (callout 2 in figure below) to release two claws, then pull out on the front edge (callout 3 below) to release the additional claws and remove the cover (callout 4 below).

Figure 1: Right cover removal 1-Three screws 2-Bottom edge 3-Front edge 4-Right cover

Left Cover removal

Remove three screws (callout 1 in photo below).
Slide the cover back in the direction of the arrow (callout 2 below) about one inch, and then pull it out away from the printer to remove it

Figure 2: Left cover removal 1-Three screws 2-Slide to back of printer

Left Front Cover removal

The following components will need to be removed before removing the Image Drive Assembly:
Transfer Unit
All print cartridges
Left Cover

Disconnect the control panel connector (callout 1 below) and remove one screw (callout 2 below)
Cut the cable tie that is connected around the cables ferrite bead (callout 3 below) and the cable harness (callout 4 below)

Figure 3: Left front cover 1-Control panel connector 2-One screw 3-Cable ferrite bead 4-Cable harness

Remove the power switch rod from the power switch button.
If necessary to better access the area, remove the torroid from the cable. To remove the torroid, lift up on the strip (callout 1 below) and swing the top cover (callout 2 below) open and then remove the torroid from the wires.

Figure 4: Torroid removal 1-Torroid strip 2-Torroid wires

Unhook one claw (callout 2 below) from the bottom of the cover and pull out the bottom of the cover to loosen it.

Reassembly note: Remember to put the switch rod back into the switch button.

 Figure 5: Bottom of left cover 1-Power switch 2-Claw

Unhook three more claws by pressing in or squeezing, at the indicated locations (callout 1below), working up from the bottom, to remove the cover (callout 2 below) from the printer.

Figure 6: Control panel 1-Claws 2-Cover

Top Cover removal

The following components will need to be removed before removing the Image Drive Assembly:
Transfer Unit
All four print cartridges
Right Cover
Left Cover
Left Front Cover

Remove four screws (callout 1 below), unhook one claw (callout 2 below), and lift the cover off the printer.

Figure 7: Top cover 1-Four screws 2-Claw

Upper Rear Door Removal

Open the upper rear door.
Press in on the left hinge (callout 1 below), pushing towards the right to release the hinge pin, then pull the left side out and to the left (callout 2 below) to remove the cover.

Figure 8: Upper rear door 1-Left hing 2-Direction to release door

Rear Cover removal

Release two claws on the right side of the rear cover by inserting a flat-blade screwdriver into each claw location (callout 1 below) and twist the screwdriver to release each claw, then pull the cover out and to the right (callout 2 below) to remove it.

Figure 9: Rear door 1-Claws 2-Direction to remove cover

Lower Rear Door removal

Open the lower rear door.
Press in on the left hinge (callout 1 below) pushing towards the right to release the pin, then pull the left side of the tray out and to the left (callout 2 below) to remove it.

Figure 10: Lower rear door 1-Left hing 2-Pull to left

Multi-purpose tray removal

Open the Tray 1.
Remove two pins (callout 1 below) by flexing the slotted rail (callout 2 below) to release the pin.
Press in on the left hinge at the base as shown by the arrow, then pull the left side of the tray out and to the right to remove the tray (callout 3 below).

Figure11: Tray 1 1-Two pins 2-Slotted rail 3-Tray

Fuser removal

CAUTION: Be sure to turn the power off and unplug the power cord before removing the fuser.When removing the fuser, wait ten minutes to allow it to cool before removing it.

NOTE: Note If the fuser failed or has been replace for some reason other than reaching its end-of-life (end-of-life is indicated by a control panel message stating that the fuser requires replacement) then, in addition to replacing it, a configuration procedure must be performed.

Remove the lower rear door. See Lower rear door (rear output bin) removal.
Hold the release tabs on each side of the fuser by placing your thumbs on the top tabs (callout 1 below) and your forefingers on the lower tabs (callout 2 below). Press up on the bottom tabs (callout 2 below) to release the assembly and pull it toward you to remove it.

Figure12: Fuser 1- Top tabs 2-Lower tabs

Face down delivery removal

Remove the following covers:
Upper rear door
Rear cover
Lower rear door
Right cover
Left cover
Left front cover
Top cover
Remove six screws (callout 1 below).
Pull the face-down assembly out slightly, disconnect one connector (callout 2 below) from the back, and then remove the assembly (callout 3 below).

Figure 13: Face down delivery assembly 1-Six screws 2-Connector 3-FDD assembly

Laser Scanner assembly removal

CAUTION: Do not disassemble the laser/scanner assembly. It is not adjustable. Do not touch the lens on the front of the laser/scanner assembly when holding it.

Remove the face-down delivery assembly.
Remove the exhaust fan (FAN1) assembly (See High-voltage power supply PCB removal)
Remove one connector (callout 1 below) from the left side of the laser/scanner assembly.
Remove six screws (callout 2 below) and pull the laser/scanner assembly out slightly, disconnect two flat cables (callout 3 below), and remove the assembly.

Figure14: Laser scanner 1-Connector 2-Six screws 3-Two flat cables

NOTE: Reassembly note: Connect the connectors (see callout (3) above) first, then install the laser/scanner assembly. Ensure that the top of the laser/scanner fits into the slots first before installing the remainder of the unit.

Verifying successful repair

Print a configuration page and verify printer functionality. Send a print job from the PC to verify connectivity and printer function.

© 2005 Hewlett-Packard