52 scanner error

[rt67]

I'd like you help me about this issue: I have a Laserjet Pro MFP M521dn that is used in a hospital which still display the following message: "52 Scanner Error Turn off then Turn On" . I have tried turning it off and waiting then turning it back on. Doesn't help comes right back. I have replaced the scanner assymbly... worked for about an hour. replaced the laser..... didnt help issue. Could you please assist me in that issue?

[davidzuts]

52.X PRINTER ERROR

The laser scanner speed is incorrect. X description: 1 = Scanner startup error 2 = Scanner rotation error

1. Press GO. The page containing the error will automatically be reprinted. 2. Turn the printer off and then on. 3. Reseat cables to the laser/ scanner and engine controller. 4. Replace the laser/scanner.

You said you replaced the laser/scanner which is the only item that can cause the error so you either got a bad laser/scanner replacment or the only other thing I can think of is the cable that goes to the back top of the laser/scanner that connects to the motor inside the scanner that is causing the issue. I guess it could also be a engine controller issue but in my 25 years of doing this I have never seen a 52 error caused by a bad ECB. Any that I have seen have been the motor inside the laser/scanner stickey or bad.

[rt67]

Ok I have taken the scanner and laser that I replaced and put them in another M521. Both parts work fine in the other mfp. I also swapped formatters. No change! Any other suggestions

[davidzuts]

Just to make sure we are talking about the same part attached are the instructions for the replacement of the laser/scanner. The part is the big black box in the center.  If you did replace that part, then the only other part I can think of is the dc controller RM1-8615-000CN. If you did not replace that part, then that is the part you need to replace.

[rt67]

Howdy davidzuts,  Yes we are talking about the same part. How ever I have changed the flat bed scanner too, with know change. Now when I  first had the issue I changed the scanner (Scanner assembly A8P79-6012) and it worked for about an hour, then went back to the 52 error. I have since then taken the current scanner and laser and installed them both on another m521 and they both work. I even swapped the formatter and that didn't change my issue.

[davidzuts]

First off lets set the record straight. A 52 error only applies to the laser/scanner assembly and the items that control it. It does not apply to the scanner assembly. If the scanner assembly has an issue the error will be a 30. error or scanner error #. So the unit working after you replaced the scanner assembly was just a coincidence as your error refers to the motor speed of the laser/scanner. Since your parts work in another printer, then I would lean towards replacing the dc controller since that is what the laser/scanner plugs into.

[rt67]

Ok I understand what you are saying, however you keep refering to the laser as "laser/scanner" it's a little misleading and confusing. I guess I'll try another laser and then the dc controler. Thanks. I'll let you know how it goes.

[davidzuts]

Because that is what HP calls the part for all laser printers. Refer to the attachment above and look what it says at the top of the page. Different companies call this part different names but all hp laser printers call it the laser/scanner and all lexmark printers call it the printhead. It is only a name which can get confusing when you also have a scanner unit attached to the printer for copying, faxing or scanning. Since you have moved the item to another printer and it works, why not just move the dc controller from the other printer to the printer with the problem first to make sure it will solve the problem.

[rt67]

Alright, I have changed the dc controller now and still the same error....... I also just to be sure swapped a laser out of a known working mfp to this one and put the laser from my problem mfp into the known working one. Both lasers are good and both work in the known good mfp. I have even swapped dc controller from known good to the bad and still no change. Put dc controller from bad mfp into the known good mfp and it still works.  I'm at a loss........... thinking good boat anchor ! lol !

[rt67]

Hello is there anybody out there?