ARM 450 trouble removing Laser Unit

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  • axyun
    Service Manager

    Site Contributor
    1,000+ Posts
    • Aug 2007
    • 1323
    #1

    ARM 450 trouble removing Laser Unit

    I was a little surprised last night when I attempted to remove an ARM450 laser unit from machine and was not able to get back of unit over the metal plate. It can't lift high enough to go over as the ceiling above is close to top of LSU.

    This is weird because I have done this about 4 times recently on 350s and once on this very same 450. It is an older versin from 2002 that doesn't have the metal plate with 4 screws that fan is on. The fan is screwed on directly to the metal frame which is blocking the LSU from coming over.

    Is it possible that when reinstalled this LSU a couple of weeks ago I somehow allowed the unit to go in a little further then it was supposed to? It lined up with the 2 metal when mounting plates when I installed it so I assumed it was in okay and it appeared to be pretty simple installation.

    I thought maybe i was having asenior moment so I just stopped last night and watched an old movie and just tried again but no luck. I don't feel like taking a bunch of crap off unnecessarily and there is no sense of urgency as it is not a customer's machine.

    Your help is appreciated. Frank/ActionPhotocopy
    Tags: None
    • Silvertoast
      Trusted Tech

      250+ Posts
      • Feb 2010
      • 270
      #2
      Re: ARM 450 trouble removing Laser Unit

      if i remember correctly (someone can correct me if im wrong) the early versions of this machine did not have the removable plate below the lsu. i remember because i use to dread doin an lsu swap on these. all of the panels had to come off and remove the screws that hold the upper peice in place (the peice that holds motherboard and hdd) then lift it up enough to remove lsu

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        • Silvertoast
          Trusted Tech

          250+ Posts
          • Feb 2010
          • 270
          #3
          Re: ARM 450 trouble removing Laser Unit

          i think it would be almost impossible to install one of these lsu incorrectly.

            Comment

            • axyun
              Service Manager

              Site Contributor
              1,000+ Posts
              • Aug 2007
              • 1323
              #4
              Re: ARM 450 trouble removing Laser Unit

              I am thinking now that I did not remove unit 2 weeks ago as I first thought but just the circuit board on the front , thinking I could use it in another machine I was having an E7-02 issue with. Of course that didn't work out and when I put this on back I had an E7-02 on it which is why i want replace with another unit.

              Here. I was thinking that I had done something wrong(other than taking board off which was not too bright)but evidently the earlier version of the series was removed in totally different way. They must be using monkeys to help with designing. How clueless can you be?

              The service manual sucks because they don't even show LSU removal in disassembly section. I

              Can anyone think of shortcut..ie. hacksaw,sledgehammer,crowbar. Where's leatherface when you need him.

              Now I know why somebody sold me one for $45 and the main prism was off and moving around inside with a few tiny chips. Somebody must have gotten frustrated taking it out of a machine.

              You really have to have a sense of humor about these things.Frank

                Comment

                • blackcat4866
                  Master Of The Obvious

                  Site Contributor
                  10,000+ Posts
                  • Jul 2007
                  • 22997
                  #5
                  Re: ARM 450 trouble removing Laser Unit

                  Originally posted by Silvertoast
                  if i remember correctly (someone can correct me if im wrong) the early versions of this machine did not have the removable plate below the lsu. i remember because i use to dread doin an lsu swap on these. all of the panels had to come off and remove the screws that hold the upper peice in place (the peice that holds motherboard and hdd) then lift it up enough to remove lsu

                  Silvertoast is correct. The early versions of the Tiger did not have the removeable plate over the laser. Instead, it's a frame crosspiece screwed through the front and rear frames.

                  I discovered it one day, when my service manager approached me at the office and handed over a laser unit. He gave me the address and said that It should be my first call Monday. What he didn't tell me is that he had already been onsite for 8 hours Friday, and the laser unit wasn't yet removed. The copier was spread all over a 20' x 20' office. It took me 4 hours to finish the job, and write a procedure for the next time.

                  There are no shortcuts, but I can share the procedure if you'd like. I think I already have your email address. Watch your email. =^..^=
                  If you'd like a serious answer to your request:
                  1) demonstrate that you've read the manual
                  2) demonstrate that you made some attempt to fix it.
                  3) if you're going to ask about jams include the jam code.
                  4) if you're going to ask about an error code include the error code.
                  5) You are the person onsite. Only you can make observations.

                  blackcat: Master Of The Obvious =^..^=

                    Comment

                    • axyun
                      Service Manager

                      Site Contributor
                      1,000+ Posts
                      • Aug 2007
                      • 1323
                      #6
                      Re: ARM 450 trouble removing Laser Unit

                      Thanks David. I'll look for the email. Frank

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                        • axyun
                          Service Manager

                          Site Contributor
                          1,000+ Posts
                          • Aug 2007
                          • 1323
                          #7
                          Re: ARM 450 trouble removing Laser Unit

                          As I said in the post above, Paul, the service manual sucks and does not even show how to remove LSU in disassembly. Now, how would i know that?

                            Comment

                            • faxman28
                              Trusted Tech

                              Site Contributor
                              250+ Posts
                              • Nov 2010
                              • 436
                              #8
                              Re: ARM 450 trouble removing Laser Unit

                              sure you got it out by now. the procedure is in the ar-p350/p450 service manual, same issue had machine totally torn apart to replace lsu, found bulletin about change in metal plate for easier lsu removal. then found old p350 manual remove top half of printer frame with lsu attached(remove all panels first, a few cables, bobs your uncle and lsu was out.

                                Comment

                                • axyun
                                  Service Manager

                                  Site Contributor
                                  1,000+ Posts
                                  • Aug 2007
                                  • 1323
                                  #9
                                  Re: ARM 450 trouble removing Laser Unit

                                  Thanks faxman. David sent me instructions but I have not done it yet as it is in my place and not customer machine. Sounds like less to take out if doing from top. Frank

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