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MF6530 "Paper Jam / Open Left Cover". I took a video in the tray. No error code.
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[QUOTE="mf6530test, post: 220361, member: 18663"] [B]Problem[/B] The display says "Paper Jam / Open Left Cover" without any code. I am not sure if the jam is real. [B]Why I don't think there is a real jam[/B] I put a camera inside the paper tray and upload the video to youtube: [MEDIA=youtube]aZh3njZkLwo[/MEDIA] In the video, I see the following things. 1. At 0:03, the cassette pickup roller (CPR) would push the top paper forward 2. At 0:04, the CPR would push that top paper once more. After that, the top paper completely goes in. 3. At 0:06, the CPR would push the 2nd paper. 4. Then the printer says it gets a paper jam. The top of the 2nd piece of paper is right at the end of the registration roller. The paper doesn't go a bit beyond the registration roller. After I open the left cover, I can't just pull that single piece of paper out. I have to manually roll the roller to get the 2nd paper out. Here is a [URL='https://i.stack.imgur.com/0tKgb.png']diagram of the parts in the service manual[/URL]. [B]Retry Pickup?[/B] On page 111, the service manual talks about a "Retry Pickup": - If the registration sensor(SR11) does not detect paper within a specific period of time after the cassette pickup roller has started to rotate, the machine will start to rotate the cassette pickup roller once again to execute a retry pickup operation - If the registration sensor (SR11) still does not detect paper within a specific period of time after executing a retry pickup 3 times, the machine will identify the condition as a jam and will indicate a jam message on the LCD of its control panel At first, I thought maybe SR11 was faulty and couldn't detect the paper. That would make the machine do that "retry pickup". But I am not sure because I *can't* even see an error code for the jam. [B]My attempt to get the error code for the jam[/B] Does a jam always have an error code? If that is the case, how to see that code? I have tried: 1. Go into maintenance mode ([additional function], [2], [8], [additional function]) 2. Clear history of error 3. Copy something and let the paper jam. 4. Print the history of errors But that history is blank. [B]Sensor Tests[/B] I also did several sensor tests using the normal sensor mode (not the latch mode). [B]Testing the Sensor for Papers in Tray[/B] Test of the cassette paper sensor (SR9): - When I remove all papers in the paper tray, the display says "CAS 0". - After I put papers back into the tray, the display says "CAS 1". When the tray has papers, CAS = 1. When the tray has no paper, CAS = 0. What I see: 0/tray has no paper, 1/tray has paper. But page 224 (F14-14) of the manual says the exact opposite: "CAS: Cassette paper sensor (SR9): 0/Document presence, 1/Document absent". [B]Testing the Registration Sensor[/B] - When I did a sensor test after the paper jam, I saw "REG 1". - After I removed the paper, I saw "REG 0". What I see: 0/no paper, 1/has paper. The manual says the exact opposite: "REG: Registration sensor (SR11): 0/Document presence, 1/Document absent” [B]Testing the Delivery Sensor[/B] - I ask the printer to make a copy. Before the printer completes the print, I open the left cover. - Before I remove the half-printed document, the sensor test says “DEL 1 0”. - After I remove the half-printed document, the sensor test says: “DEL 0 0” What I see: 0 0/no paper, 1 0/has paper. The manual says the same thing: "Delivery sensor (SR5): 1/Document presence, 0/Document absence.” [/QUOTE]
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MF6530 "Paper Jam / Open Left Cover". I took a video in the tray. No error code.
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