Updated: Apr 22, 2019
The 51.00.10, 41.02.YZ or 52. error code on the following laser printers HP LaserJet M601 M602 M603 M604 M605 M606 can be temporary so try following this printer service procedure. Power off printer turn back on to see if the error clears. If the error returns after repeated attempts, you have a failing printer laser scanner assembly that you will need to replace.
Common replacement part for error code 51.00.10, 41.02.YZ or 52.
Typically it fails intermittently first before you get a solid 51.00.10 Error. Replacing the M601 M602 M603 HP printer laser laser scanner is not a difficult job. To begin with remove the top cover and side panels, and from that point you can unscrew & disconnect the laser scanner and install the replacement scanner. The typical repair time would be 30 minutes.
How to Replace the Laser Scanner Assembly HP LaserJet M601 M602 M603 M605 M606 M606.
Turn the printer off.
Remove the printers top accessory cover.
Next, remove the duplexer cover from the rear of the printer or remove the duplexer if it is installed.
Remove the printer's formatter cover by sliding it away from the rear of the printer.
Loosen the 2 formatter thumb screws, which secure the cage.
With the thumb screws loosened, slide the formatter cage away from the printer to remove it.
Next you will remove the M601 M602 M603 top cover. Begin by folding open the rear-output bin, lifting open the toner cartridge access door, and opening the front cover.
If you have the optional stapler stacker accessory installed on top of the printer, lift it straight up and away to remove it.
Use a pair of needle-nose pliers to pinch and free the tabs which lock the plastic drive-arm to the toner access lid. Then push the drive-arm down into the printer so it will be out of the way and won't snag when you remove the top cover.
Remove four screws from the top cover.
Partially close the toner access door, and use a small flat-blade screwdriver to release the 2 hidden tabs.
Lift the M601 M602 M603 top cover up and away to remove it from the printer.
Next you will remove the right side cover.
Release the two tabs which hold the right side cover.
Carefully pry near the M601 M602 M603 control panel, to separate the right side cover from the printer.
Rotate the top of the right side cover away from the printer, and then lift it up and free.
Now you will have access to the M601 M602 M603 laser scanner assembly.
Disconnect the laser scanner's wire harness from the DC controller PCA.
Next, remove the M601 M602 M603 laser scanner's wire harness from the wire guide.
Remove 4 screws, and also remove the attached grounding clips.
Disconnect the wire harness from the M601 M602 M603 laser scanner PCA board.
Now, carefully lift the laser scanner up and out of the printer. Make sure it doesn't catch or snag on any wires as you remove it.
Install the new M601 M602 M603 laser scanner, and route the wires through the correct cable guides.
RM1-8406-000CN Laser Scanner assembly for HP LaserJet M601 M602 M603 M604 M605 M606 series RM1-8373.
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