Error 59.A0

HP Color LaserJet 2500 Series Printer - IC107 Motor Failure Results in Error 59.A0

Blank Pages, Flashing Developer Lights, or a Light Burning Smell IC107, an IC motor driver that controls the rotary engagement motor, is failing. The rotary engagement motor provides two vital functions: moves the e-label reader into position to read the developer e-labels, and moves the carousel forward so that the developer roller can engage the OPC. The IC failure has presented one or more of the following symptoms:

The IC107 fails to engage the motor to move the developers against the OPC, resulting in a blank pages.
The error code 59.AO is written to the error log, and both the GO and Ready lights flash as the secondary light pattern.
The IC107 fails to engage the e-label reader causing all of the developing lights to flash.
On rare occasions, the IC107 may upon direct failure cause a light burning smell to emanate from the product.

Printing blank pages

If the unit is printing blank pages, perform the following to troubleshoot the issue.
Perform an engine test. The engine test is used to verify that the print engine is functioning correctly. The formatter is bypassed during an engine test, so the engine test is useful for isolating print problems. Because the engine test prints horizontal lines along the entire printable area of a page, it is also useful for checking and adjusting registration.
Open Tray 1, the multipurpose tray.
Press the engine-test switch, inside Tray 1 on the left side, just below the front cover.

NOTE: The formatter must be connected to the ECU to perform an engine test. Otherwise, the printer will not print the engine test.

Figure 1: Engine test switch

The engine test page will print a series of 2-inch (50.8 mm) lines in each color. If the engine test does not print correctly, print an internal test page. If the page is still blank, remove any EIO devices or printer cables.
Reseat the memory DIMM.
Turn off the printer and disconnect the power cable.
Open the plastic outer DIMM door on the right side of the printer.
Open the metal inner DIMM door on the right side of the printer.
Release the locks on each side of the DIMM slot.
Remove all extra DIMM and reseat the 64 MB DIMM.
Reseat the Firmware DIMM.
Upgrade the firmware if necessary.

NOTE: HP Color LaserJet 2500 only: Check the serial number of the printer. If the fourth digit is an H, the unit has firmware (MROM) on board the formatter and cannot be upgraded without replacing the formatter.

Verify power to the wall and/or change the power source, if possible.
If the unit continues to print blank pages, replace the rotary engagement (carousel) motor and/or the DC controller.

Error 59.A0 or Lights Flashing

Open the HP Toolbox and check supplies status and the color page count.
Manually remove the print cartridges from the unit, if possible, and verify that the developer roller will turn. If a roller on one of the cartridges will not turn, replace that cartridge.
Perform a cold reset to clear the error condition and try printing again.
Upgrade the firmware if necessary.

NOTE: HP Color LaserJet 2500 only: Check the serial number of the printer. If the fourth digit is an H, the unit has firmware (MROM) on board the formatter and cannot be upgraded without replacing the formatter.

If the printer continues to experience the 59.A0 and/or the flashing lights, replace the rotary engagement (carousel) motor and/or the DC controller.

Light burning smell

On rare occasions, the IC107 may upon direct failure cause a light burning smell to emanate from the product. If this occurs, perform the following:
Verify that the media is within specification for the product.
Verify power to the wall and/or change the power source, if possible.
If the printer continues to emit a light burning smell, replace the rotary engagement (carousel) motor and/or the DC controller.

Parts required (part numbers are subject to change)
DC Controller
RG5-6959-060CN
24v Rotary Engagement Motor (carousel motor)
RH7-1533-000CN

In most cases, replacing the IC motor driver (carousel motor) will resolve the issue; however, it may be necessary to replace the DC controller.

Repair and replacement instructions

Right- and left-side covers

Follow the steps below to remove the right-side cover. Then remove the left-side cover in the same manner.
Remove one screw (Call-out 1) from the lower edge of the cover.

Figure 2: Right-side cover

1 - One (1) screw

Grasp the cover by the handle and by the top and then pull the cover out gently, rotating the cover away from the printer as you lift it.

CAUTION: To avoid breaking two internal tabs lift the cover straight up.

Figure 3: Right-side cover tabs

1 - Two (2) tabs

Repeat Steps 1 and 2 to remove the left-side cover.

Reinstall note: Reattach the tab closer to the front of the printer before reattaching the back tab.

Carousel motor (J704)

Remove the left-side cover.
Unplug one cable connector (Call-out 1).
Remove two screws (Call-out 2).

Figure 4: Carousel motor (J704)

1 - One cable connector

2 - Two screws

Rotate the motor counterclockwise to clear the metal lock-tab.
Lift the carousel motor away from the printer to remove it.

Fusing assembly removal

Turn the printer off.
Rotate the two locking tabs upward.

Figure 5: Fuser cover and fusing assembly

1 - Two locking tabs

Gently slide the fuser out of the printer.

Interface cover removal

Remove the fusing assembly.
Release the tab at the top of the interface cover and the tab at the back cover.

Figure 6: Interface cover

1 - One top interface cover tab

2 - One back cover tab

Rotate the top of the interface cover away from the printer to remove the cover.

Formatter cage removal

Remove the following cover and assembly:
Right-side cover
Interface cover
Unplug the flat flexible cable (Call-out 1).
Use a flatblade screwdriver to pinch the tab on the cable connector (Call-out 2) to unplug the connector.

NOTE: It may be easier to unplug the connector after completing Step 6.

Remove three screws (Call-out 3) from the formatter cage.

Figure 7: Formatter cage

1 - Flat flexible cable

2 - Cable connector

3 - Three screws

Remove two screws (Call-out 1) from the formatter cage.
Remove the formatter cage upward to remove it from two hooks (Call-out 2).

Figure 8: Formatter cage removal

1 - Two screws

2 - Two hooks

DC Controller removal

Remove the following covers and assemblies:
Right-side cover
Interface cover
Formatter cage
Unplug the flat flexible cable (Call-out 1).
Release the cables from two cable-holders (Call-out 2).
Unplug one cable connector (Call-out 3) by pressing and releasing the tab on the side of the connector.
Unplug two cable connectors (Call-out 4) by releasing a clip on each connector (see the detail in the lower-left corner of the following figure).

Figure 9: DC Controller connectors and cables

1 - Flat flexible cable

2 - Two cable holders

3 - One cable connector

4 - Two cable connectors

Unplug the remaining 24 cable connectors.
Remove four screws (Call-out 2).

Figure 10: DC Controller screws and empty connection

1 - DC Controller flash connection

2 - Four screws

Reinstall note: The connection that remains empty upon reinstallation is shown in Call-out 1 above. The connection is used to "flash" the DC controller.

Lift the DC controller up and then away from the printer.

© 2005 Hewlett-Packard