Loud clicking and jamming, changed 40X2831 Media feed ACM clutch CBM and 40X2838 Media (ACM) drive assembly with very little help if any.

Hi,
There are a number of reasons why the paper would jam at registration. First off, if the paper is completely flat & straight it is probably a feed issue or paper detect issue. There are 2 little black photo reflectors before the rollers in the centre of the feed path. These sensors can get covered with paper dust & may need cleaning. Also try feeding paper from the manual feed tray & see if it jams. If you have jams from both cassette's & manual feed then its most likely a sensor of feed issue. If its from one tray only then the sensors in the vertical path may be dusty with paper dust or worn pick up & feed tyres. There is also an issue with the feed clutches in the paper pick up drive unit which can fail & have been upgraded.
Secondly, if the paper is Z folded at the registration rollers but before the fuser then it could be the primary bed drive gear. This gear also drives the secondary belt unit located in the right hand door assembly.
Hope this helps.
Dave.

Try looking for distorted paper guides and trace the paper passages for any disposition or maybe foreign object stuck on it. try shuffle the papers too.

A replacement is needed for the following parts:
40X2838 Media (ACM) drive assembly40X5930 Media feed ACM clutch CBM40X2853 ACM drive shaft assembly
Please contact Lexmark Technical Support for further assistance.

JAM IN TOP COVER AREA
A jam exists in the top-cover area.
A 13.20.00 error message indicates that the printer power was turned on or that the printer attempted to initialize while the pre-feed sensor (PS102), the top of page sensor (PS102) and/or the fuser delivery sensor (PS108) was detecting media.

When the paper feed assembly is installed, the sensor-flag spring must be correctly positioned
for the flag to operate. If a paper-jam error message (13.20.00 JAM) appears on the control-panel
display after you replace the paper feed assembly, verify that this sensor-flag spring is installed
correctly.
Hook the spring over the flag tab (see 1 in Figure). Fasten the paper feed assembly to the
chassis with the flag spring positioned in the hole in the transfer assembly. Release the spring
from the tab on the flag (see 2 in Figure). See figure below.
Verify that the flag is held in the upright position, can freely move, and always returns to the upright
position. If the flag does not move freely, or return to the upright position, an error
message (13.20.00 JAM) will appear on the control-panel display when the printer power is turned
on.

Thank you contacting FixYa for your printer inquiry.
This error is associated with either a sheet of paper blocking the paper path or a partial piece of paper that blocks path or trips a sensor. The printer will usually throw up a error code 13.XX on the display and the XX is a number that will indicate where in the paper path this error most probably occurred. Just follow the steps for your error on the below chart.
This link will take you to the user guide which will be helpfull identifying components and providing guidelines for most of the helpful hints and things you will need to know about this printer.
http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c00218691/c00218691.pdf
Locate your error on the matrix below and follow the steps. Comment back if you need more help. Thank you again for contacting FixYa.
TF
HP Laserjet Error Codes 0 - 19 Message on printer Display Panel What it means. What to do. 13.XX PAPER JAM [LOCATION] Media is jammed at the specified location (and possibly at other locations). If the message persists after all jams have been cleared, a sensor or sensor lever might be stuck or broken. For all jam messages, do the following: 1. Remove jammed print media from the specified location. Check the entire paper path for other pieces of media in the path. 2. Open and close the top cover to clear the message. 3. Check sensors and flags in the paper path for proper operation. 3.0 PAPER JAM [LOCATION] A non-specific paper jam occurred. 1. Remove jammed media from the specified location. 2. Verify the paper tray is fully closed. 3. Inspect and/or replace the feed and separation rollers. 4. Ensure there is no obstruction in the path, such as a torn piece of paper. 5. Open and close the top cover to clear the message. 6. Check sensors and flags for proper operation. 13.1 PAPER JAM OPEN INPUT TRAYS Paper-delay jam at paperfeed area. 1. Ensure that paper trays are loaded and adjusted properly so media can feed from the tray. It might be necessary to reduce the stack height of media in the tray. 2. Check the input area for obstructions such as media in the path. Also check to see if the registration assembly damaged or unseated. 3. Replace any defective sensors or flags. 4. Verify the media meets the specifications. 5. Check the pickup feed and separation rollers for unusual wear. Replace as needed. 6. Rotate the media in the input tray by 180° and/or turn it over On NX engines this is most likely the fuser flag or the ACPM. The ACPM has a photosensor hard-wired to the back of it. 13.10 PAPER JAM CHECK DUPLEXER Jam at duplexer. 1. Check the duplexer and the rear area of the printer for obstructions or damage. 2. Check the duplexer for proper operation. Replace the duplexer if a sensor is defective. On a 5si, 8000, or 8100 series laserjet a Duplex Jam can be caused by a tray 2 and 3 feed assembly failure. 13.14 For Laserjet 5si. This error is caused by a defective paper control PCA Replace paper control PCA. 13.2 PAPER JAM OPEN INPUT TRAYS Paper-stopped jam at paper-feed area. 1. Check the input area for obstructions such as paper in the path. Also check to see if the registration assembly is damaged or if the transfer roller is out of place. 2. Replace any defective sensors or flags. 3. Ensure the media does not exceed the maximum length. 4. If multiple sheets are feeding, it might be necessary to fan the media and reduce the stack height. Also, replace separation pad. 5. Verify that the fuser is properly installed. On NX engines this is an input jam. 13.20 PAPER JAM CHECK REAR DOOR Media stopped in the paper path during power on or when the top door was closed. 1. Remove all media in the paper path, and then open and close the top cover. 2. If the message persists after all media is removed: Check if media is jammed in the prefeed area. Replace any defective sensors or flags 13.21 DOOR OPEN JAM The top cover was open while printing. 1. Clear the jam and close the top door. 2. If the message persists, check the top door switch for proper operation. 13.5 PAPER JAM CHECK REAR DOOR Paper-delay jam at fuser. 1. Check the transfer roller and small media belt to ensure they are operating and can feed print media. 2. Check the paper path for obstructions at the transfer roller, toner cartridge, paper feed assembly, and fuser. 3. Replace any defective sensors or flags. 4. Turn the media stack over and/ or rotate it by 180° in the input tray. If still persists - replace fuser, then DC controller. 13.6 PAPER JAM CHECK REAR DOOR Paper-stopped jam at fuser. 1. Check the paper path for obstructions at the fuser and output/delivery area. 3. Replace any defective sensors or flags. 13.99 PAPER JAM [LOCATION] A non-specific paper jam occurred. 1. Remove jammed media from the specified location. 2. Verify the paper tray is fully closed. 3. Inspect and/or replace the feed and separation rollers. 4. Ensure there is no obstruction in the path, such as a torn piece of paper. 5. Open and close the top cover to clear the message. 6. Check sensors and flags for proper operation

paper jam on hp laserjet

Hello,
The loud clicking noise is either the toner cartridge or the paper feed. If the jam occurs in the drum and toner cartridge then I recommend changing the toner.
If the paper is not being fed at all then you need to have the paper feed kit replaced.
Thanks,
Pat

7.2 Detecting Jams 7.2.1 Delay Jams 7.2.1.1 Delay Jam in Pickup Assembly 0010-4883 iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i Delay Jam in Pickup Assembly The registration sensor cannot detect the leading edge of paper within the jam detection time interval after paper pickup started. T-7-2 7.2.1.2 Delay Jam in Delivery Assembly (Paper Leading Edge Jam at First Delivery Sensor/Wound Paper Jam at Fixing Assembly) 0011-0712 iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i Paper Leading Edge Jam at First Delivery Sensor The first delivery sensor cannot detect presence of paper within the prescribed time after the registration clutch has been turned on. T-7-3 Wound Paper Jam at Fuser The first delivery sensor has detected absence of paper within the prescribed time after it detected presence of paper (within the prescribed time after the registration clutch had been turned on). T-7-4 7.2.2 Stationary Jams 7.2.2.1 Stationary Jam in Pickup Assembly 0010-4884 iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i Stationary Jam in Pickup Assembly The registration sensor does not detect absence of paper within the prescribed time before the next leading edge of fed paper reaches the registration sensor. T-7-5 7.2.2.2 Stationary Jam in Delivery Assembly (Paper Trailing Edge Stationary Jam at First Delivery Sensor/Stationary Jam at First Delivery Sensor) 0011-0733 iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i Paper Trailing Edge Stationary Jam at First Delivery Sensor The first delivery sensor cannot detect absence of paper within the prescribed time after the registration sensor has been turned off. T-7-6 Stationary Jam at First Delivery Sensor The first delivery sensor cannot detect absence of paper within the prescribed time after it has detected the leading edge of paper. T-7-7 7.2.3 Other Jams 7.2.3.1 Door Open Jam 0010-4886 iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i Door Open Jam The door is opened when paper to be printed is in the paper feed path. 7.3 Cassette Pick-Up Unit 7.3.1 Overview 0010-4887 iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i The paper picked up from the cassette is fed to the registration roller using the vertical path roller driven by the main motor (M204). The registration roller is not rotating when paper reaches there, so an arch is formed at the leading of the paper to prevent skewing. The DC controller PCB turns on the registration clutch (CL203) at the prescribed timing to transfer the main motor rotation to the registration roller, thus feeding the paper to the delivery tray through the transfer, sepa- Sensor/Solenoid Registration sensor (SR209) Pickup solenoid (SL202) Sensor/Registration clutch First delivery sensor (SR203) Registration clutch (CL203) Sensor/Registration clutch First delivery sensor (SR203) Registration clutch (CL203

SOund more to me like you have worn out feed wheels. They are slipping when trying to feed, therefore you get a paper jam indication, but no paper has been fed. Check the feed roller texture. If it is slick replace the roller.
I will state that first. You could have a sticking sensor, but that is less likely if you say it feeds paper.
The second most likely problem is the paper feed or paper registration clutch failing. Those are electromechanical clutches that are located on the loerf front section of the frame. You would need to remove the left side cover ( looking from the front). The clutches are round and silver, about an inch and a half thick with black gears on them. If the clutch faces are slipping, the rolllers will not drive and result in a jam.
The more I think about what your describing, the more I believe one of your clutches is bad.

already paper jam in feeding assembly so please check any paper jam.or lubricate all drive gears