HP Color LaserJet 2500 - Error 54.07 All Lights On

This error occurred on a long print run after 100-200 pages. The printer stopped mid print with the  Attention light, Ready light, and Go lights all on indicating a service error.

If the printer has a service error (Attention light, Ready light, and Go light are on), press and hold (GO) and (CANCEL JOB) simultaneously to see the secondary error message.

Doing this, the Attention and Ready lights were on. This secondary fault code wasn't in the service manual. Although the Hewlett Packard Color LaserJet 2550 sevice manual lists this as a carousel error.

Turning the printer off and back on resulted in it trying to initialise with a lot of clunking noises coming from the carousel and the error coming up again. With the top off and the lid switch defeated, the carousel was seen to judder forwards and backwards.

After the printer was left switched off for a while, it was possible to print a config page by pressing the Go and Cancel buttons. The error log on the config page showed a 54.07.00 error. Again, this error isn't listed in the service manual.

This fault was caused by the rotary motor assembly, part number RG5-6958-000CN. This is the motor on the rotary drive assembly that turns the carousel around.

To remove the rotary drive assembly:

1. Remove the left and right side covers by removing one screw at the bottom of each, pulling the bottom out, and lifting off at the top and front.
2. Release two tabs on the interface cover on the back and remove.
3. Release two tabs on the rear cover and remove.
4. Open the top door, remove the gear on the right hand side, and remove the top door rack. Refit the gear.
5. Remove three screws and lift the top cover off.
6. Lift off the top output bin cover.
7. Remove five screws from the formatter assembly and lift it up and off. Disconnect two cables as you lift it away from the printer.
8. Disconnect the three cables from the rotary drive assembly at the DC controller.
9. Disconnect the flat ribbon cable from the laser scanner assembly to the DC controller.
10. Remove four screws from the top of the rotary drive assembly.
11. Looking from the side of the printer, remove the left hand screw from the left hand motor on the rotary drive assembly.
12. Lift the rotary drive assembly out of the printer.

  The motor you need to replace is the longer one towards the rear of the rotary drive assembly. Remove the two screws, and the motor can be pulled out.

Reassembly is the reverse of this procedure. Take note of the following:

• Fit the the back of the rotary drive assembly into place first.
• Make sure the formatter assembly is hooked into place at the top. If it's sticking out at the top, the surface mount LEDs and resistors at the top of the formatter board can get knocked off when the right side cover is fitted.
• When you fit the top output bin cover, make sure the two plastic flaps fit over it and are not trapped behind it.
• Make sure the top cover is located properly in the top output bin cover.
• When fitting the side covers, hook them in at the front and top, and then push the bottom in.
• When you fit the right side cover, it might be best to remove the control panel first. When you fit the control panel into the cover, ease the top of the cover away from the printer. This can prevent damaging the surface mount LEDs and resistors at the top of the formatter board.

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RG5-6958-000CN

RG5-6958-000CN - Rotary motor assembly