NP 2120 adf jam light

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  • dbrownlee
    Trusted Tech

    100+ Posts
    • Sep 2005
    • 197
    #1

    NP 2120 adf jam light

    The machine copies just fine off the glass. When an original is placed in the ADF tray, the green arrow in the tray lights up, the control panel responds properly, but as soon as you press the start key, it shows a jam indicator in the ADF. No movement of rollers, noise, anything. once it shows the jam, the only way to clear it is to power the machine off/ on. At that point, there is no ops allowed at all. When it powers back on, if the original is still in the tray, the jam indicator lights back up, and you can't make copies. If the document is removed before powering on, the feed rolls in the ADF cycle, all comes to ready, but if you try to use the ADF again, the same thing happens. The first time I saw the machine a couple weeks ago, it did the same thing, but once I blew out the sensors, it worked just fine, except it needed feed supplies. Cleaned all out good when I put in the feed supplies, but now its doing this and won't clear. I'm thinking sensor, but I will have to order any I put in, and really don't want to shotgun it. According to Hytec, there is no sim to check sensor operation. Anyone else seen this? Thanks in advance.
    Dave
    GO TIGERS!!
    Tags: 2120, adf, control panel, hytec, inlet, jam, light, off, ops, pressure roller, registration roller, reliably, shee, symptoms, tested, vary
    • blackcat4866
      Master Of The Obvious

      Site Contributor
      10,000+ Posts
      • Jul 2007
      • 22999
      #2
      Master of the obsolete!

      If you already cleaned them then try adjusting the sensors. If you have sensors that will not adjust into range replace the sensor first, if that doesn't help then the ADF controller.


      ADF-A1

      Adjusting Sensor Levels(when replacing the DF Controller)
      1. Turn OFF the copier.
      2. Turn ON bit 3 of dip switch SW1 on the DF Controller.
      3. Turn ON the copier. Place a sheet of paper in the document tray.
      4. For the Document Sensor S6: Meter check pins TC2-1 and TC2-3 ground. Adjust VR2 for a sensor output of 4.5 - 4.8 VDC with copy paper in the document tray, and 3.0 - 3.3VDC with tracing paper (GNT80). LED1 goes ON.
      5. For the Last Document Trailing Edge Sensor S8: Meter check pins TC2-4 and TC2-3 ground. Adjust VR4 for a sensor output of 4.5 - 4.8VDC with copy paper in the document tray, and 3.0 - 3.3VDC with tracing paper (GNT80). LED2 goes ON.
      6. For the Registration Sensor S7: Place a sheet of copy paper in the document tray. Press push switch SW2 to advance the paper to the registration sensor. Meter check pins TC2-2 and TC2-3 ground. Adjust VR3 for a sensor output of4.5 - 4.8VDC. Press push switch SW2 to deliver the paper. Repeat with tracing paper for a sensor output of 3.0 - 3.3VDC. LED3 goes ON.
      7. Without paper, meter/recheck these test pins to TC2-3 ground:





      If S7 won't adjust into range, try reforming the bracket while you have the meter on the pins to see which way it must be reformed. This isn't as difficult as it seems. It's a 5 minute procedure once you get the hang of it.
      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

        • dbrownlee
          Trusted Tech

          100+ Posts
          • Sep 2005
          • 197
          #3
          Thanks, I'll give it a try today.
          GO TIGERS!!

            Comment

            • dbrownlee
              Trusted Tech

              100+ Posts
              • Sep 2005
              • 197
              #4
              Well, after two more visits, I'm still pulling my hair out. Went the first day and used the above info, plus some info about ADF open/ closed microswitches from another site. The microswitches all checked out ok, and after a little monkeying around, all the sensors adjusted up ok, but the machine still showed the same symptoms. Went back again today, and rechecked switches, wiring, etc. For grins, went through the sensor adjust sequence again, and could not get the REG sensor to adjust. The paper was going right past it onto the glass. After I manually blocked it, it adjusted ok, then rechecked just to be sure. When I tested the machine after that, it would actually let me start a copy in the ADF, but would get the paper almost completely on the glass, then show a jam. For giggles, I threw one in the tray in the LT-R direction, and it took off working. After running several through, it would jam once or twice every 10- 15 originals. Sometimes it would pull a few in the short direction, but not as reliably. At this point I'm thinking it is the Reg sensor(s). Does anyone have a part number for this? The emitter type that shine through the paper path, not the photointerrupter that is blocked by a flag. Also, the number for the paper end sensors in the ADF tray- they adjust ok, but they make a lot of noise. If i'm way off base, I'd be grateful for more ideas.

              Thanks in advance, Dave
              GO TIGERS!!

                Comment

                • blackcat4866
                  Master Of The Obvious

                  Site Contributor
                  10,000+ Posts
                  • Jul 2007
                  • 22999
                  #5
                  I think you're going in the right direction. If it was a board problem the sensors just would not adjust into range. Bad sensors can vary all over the place. As you can imagine, they're not so easy to change. Registration is S7, top & bottom are separate parts. If I remember correctly you don't get the sensor lens cover, so don't break it.

                  Also replace the one-way gear. These can go intermittent also.


                  ADF-A1


                  1... FG2-1715-170..... DF Controller
                  1... FH7-7023-000..... Photoreceptor (S1)
                  2... WG8-0164-000..... Photoreceptors (S2, S3)
                  1... FH7-7087-020..... Photointerrupter (S4)
                  1... RG1-0699..... Photointerrupter (S5)
                  1... FG2-1723..... Photodiode (S6)
                  1... FG1-8414..... Photodiode (S7)
                  1... FG2-1722..... Phototransistor (S8)
                  1... FG1-8494-000..... LED (S6)
                  1... FG2-1718..... LED (S7)
                  1... FG2-1721..... LED (S8)
                  1... WC4-0059..... MS1
                  1... FF2-0677..... MS2
                  1... FF2-4081..... M1, Paper Feed Motor
                  1... FF2-4084..... M2, Pickup Motor
                  1... FF2-4085..... M3, Delivery Motor
                  1... FH7-5159-000..... Brake M1
                  1... FG2-1716-000..... Harness from DF to copier
                  1... FA3-4683-060..... White Belt
                  6... FC1-0313-000..... Plastic Belt Guides
                  1... FA5-4655..... Registration Roller
                  1... FA5-4656..... Registration Pressure Roller
                  1... FA5-4684-000..... Delivery Roller Shaft
                  1... FF2-7874-000..... Exit Tray (new style)
                  1... FC1-6263-000..... Left Hinge
                  1... FA6-5833-000..... Right Hinge
                  1... FA6-5839-000..... Inlet Sub Tray flip type
                  1... FF2-8069-000..... Inlet Sub Tray new style
                  1... XF9-0218-000..... Timing Belt 71T, Front
                  Rebuild Parts
                  2... FA5-5410-000..... Pickup Tires
                  1... FA5-4654-040..... Feed Shaft
                  6... 15011368..... or Single Feed Tire (old style)
                  6... FC2-1533-000..... or Single Feed Tire (new style)
                  6... FA5-5427-000..... Separation Belts
                  1... FS3-0135-000..... One-Way Gear 22T
                  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

                    • dbrownlee
                      Trusted Tech

                      100+ Posts
                      • Sep 2005
                      • 197
                      #6
                      Thanks, Blackcat. Merry Christmas.
                      GO TIGERS!!

                        Comment

                        • blackcat4866
                          Master Of The Obvious

                          Site Contributor
                          10,000+ Posts
                          • Jul 2007
                          • 22999
                          #7
                          I'm glad to help. It's too bad that once you get really good at fixing something it's gone obsolete.
                          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

                            • dbrownlee
                              Trusted Tech

                              100+ Posts
                              • Sep 2005
                              • 197
                              #8
                              It's even worse when you finally figure out what's going on, and the customer decides that it's not worth chasing anymore. This machine is in their satellite office, and doesn't get used much. There's never been anyone around when I've been working on it. Called their head guy yesterday to give him an update, and he didn't realize I'd been out on three different times since they called back the first time. He told me that since it was kind of working, just send him the bill and quit beating my head against it. Oh well, it was interesting, anyway. Thanks again for the help.
                              Dave
                              GO TIGERS!!

                                Comment

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