Our Bizhub 350 has the following error "Paper size can't be detected in the current position against the edge guide of the universal tray". Nothing we do makes any difference

Description
Intermittent C-0201 (C0201), C-0202 (C0202) and C-0203 (C0203)paper lift error codes.
Solution
PROBABLE CAUSES:
1.The trail edge paper guide (p/n A03U R756 00) may not be pressed against the paper. This will allow the paper to fall backwards and induce the error code.
Instruct the end user to check the position of the trail edge paper guide whenever paper is loaded into the paper tray.
2. Coupling for the tray lift for Tray 1, Tray 2 or Tray 3 is obstructed or out of alignment causing the tray to not lift.
Inspect the coupler in the back of the machine for paper preventing the pin from seating in the coupler. Check alignment when tray is inserted. If out of
alignment try to adjust the drive to properly align.

I would start with the easiest solution, look to see if there is any paper jammed behind the paper tray. There are switches behind the paper tray for paper size. Also, make sure the paper tray guides are in the correct position against the paper in the tray, they tell the copier the paper size. Good Luck

Make sure it's not jammed with paper then follow these instructions for loading paper.Power unit offOpen the paper support, then slide out the extension.
Open the front cover. Next, slide out the front tray extension.Make sure that the tray lever is in up position.Slide the edge guide to the left.Fan a stack of paper, then tap it on a flat surface to even the edges.Load the paper with the printable side up, against the right side of the sheet feeder and place it behind the tabs. The printable side is often white and brighter then the other side... if using non-standard A4.Slide the edge guid against the left edge of the paper, but not too tightly.Power unit back on.

This error message means that the printer has determined that the length of the paper in the source specified on the second line of the display is too short to print the formatted data. For auto-size sensing trays, this error occurs if the guides are not in the correct position.

Please try to do the following

? Press Go to clear the message and continue printing. The printer does not automatically reprint the page that prompted the message.

? Make sure the Paper Size setting in the Paper Menu is correct for the size paper you are using. If MP Feeder Size is set to Universal, make sure your paper is large enough for the formatted data.

? Press Menu to open the Job Menu and cancel the current job. Please see also the media guidelines on the user manual p.29

For further assistance, please contact Lexmark Technical Support.

To properly lay the 4 X 6 in paper in the tray, please follow the steps below:

• Pull tray completely out of the printer.
• Move the paper guides to the sides of tray.

• Use the photo paper outline on the bottom of the tray to help you position your paper.

• Load your paper.
• Adjust the paper guides to rest gently against the left, right, and bottom edges of the photo paper.

• Insert the tray.

Make sure the correct print setting is configured before printing your file. With your file open, click File > Print > Properties > From the Paper Size list of the Print Setup tab, select 4 X 6 in. Click OK to save the setting. Click OK again to print your file.

Check behind the tray any paper stuck back there? Try swapping the paper from portrait to landscape or vise versa.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

This error message means that the printer has determined that the length of the paper in the source specified on the second line of the display is too short to print the formatted data. For auto-size sensing trays, this error occurs if the guides are not in the correct position.

Please try to do the following

• Press Go to clear the message and continue printing. The printer does not automatically reprint the page that prompted the message.

• Make sure the Paper Size setting in the Paper Menu is correct for the size paper you are using. If MP Feeder Size is set to Universal, make sure your paper is large enough for the formatted data.

• Press Menu to open the Job Menu and cancel the current job. Please see also the media guidelines on the user manual p.29

For further assistance, please contact Lexmark Technical Support.

1. Pull out the paper tray.
2. If necessary, slide the paper tray edge guides so that the guides are open.
   1. To adjust the side and rear guides, pinch the guide lever on each guide and slide the guides to their new position.
   2. To secure the guides in position, release the levers.
3. Load the paper against the left-hand side of the paper tray. Paper can be loaded either short edge feed or long edge feed.
4. If necessary, slide the paper edge guides so that they just touch the edge of the paper stack.
   
   NOTE: When loading standard size paper, set the edge guides onto the notches on the paper tray to match the paper size.
   
   
5. Close the paper tray.
6. Set the machine to detect the paper size automatically, or manually specify the required size.
   
   NOTE: Paper sizes detected by the machine vary depending on the Machine Administrator setting. See the Related Items below for additional information.
   
   
7. If the type of paper has changed in the paper tray, then the paper type must be changed on the Control Panel as well. See the To modify the paper type on the Control Panel section below.

Normally just the guides need to be set correctly in the paper tray, The tray size sensing switched may be bad or the actuator on the tray may have slipped position.

Follow these steps to reload paper:

1. Remove the paper and make sure it's not curled or wrinkled.
   
   
2. Fan the stack to make sure the sheets are separated.
   
   
3. Open the paper support and pull up the extension.
   
   
4. Extend the output tray.
   
   
   
   
5. Flip the feeder guard forward. Squeeze the edge guide and slide it left.
   
   
   
   
6. Insert paper, printable side up and short edge first, against the right side and beneath the tab.
   
   
   
   You can load up to 100 sheets of 20 lb plain paper or up to 20 sheets of photo paper.
   
   
7. Slide the edge guide to the edge of the paper, but not too tightly.
   
   
   
   Follow these guidelines when loading paper:
   
   
   • Do not load paper above the arrow on the edge guide.
     
     
   • If multiple pages feed at once, remove the paper from the sheet feeder, fan the edges to separate the sheets, then reload it.
     
     
   • If you're printing on both sides of the paper, try loading fewer sheets.
     
     
   • If it's wrinkled when it ejects, the paper may be damp or too thin.
     
     
   • Do not load paper with holes punched in it for insertion in a binder.
     
     
   • Load the printable side face-up. It's often brighter or whiter than the other side.
     
     
   • Load letterhead or preprinted paper top edge first.
     
     
   • If you experience paper feeding problems, try loading fewer sheets.
     
     
   • If you're using special paper, check the package for special loading instructions.

Follow these steps to reload paper in the Automatic Document Feeder:

1. Remove the paper and make sure it's not curled or wrinkled.
   
   
2. Tap the originals on a flat surface to even the edges.
   
   
3. Move the edge guides outward.
   
   
   
   
4. Insert the originals face-up. You can load up to 30 letter-size sheets at a time. If you load legal-size sheets, insert only 10 sheets at a time. Make sure the originals are not creased or folded and do not have tape, staples, or other materials that could obstruct the feeder.
   
   
   
   
5. Slide the edge guides against the originals.
   
   

I can't locate that exact code, but C09XX are paper feed section codes, check the paper sources for properly loaded paper, also does the size of paper in the drawer corospond correctly to the size displayed on the control panel?
If you have adjustable trays are the edge guides against the paper?
Does there appear to be a double or stream feed?
Are any of the pages damaged before they were removed?