IF the jammed paper tears and you cannot remove the paper either from the paper output slot or from the transport unit, or the jammed paper remains inside the machine, remove the paper following the procedure below.
1. Turn off the machine, and unplug the power cord of the machine from the power supply.
2. Open the paper output cover.
Remove the paper on the front tray if any.
Important:
Do not touch the clear film (A). If the paper or your hands touch these parts and blot or scratch them, the machine can be damaged.
3. Make sure that the FINE cartridge holder does not hang over the paper.
If the FINE cartridge holder hangs over the paper, move the FINE cartridge holder to the right edge or the left edge whichever is easier to remove the paper.
When you move the FINE cartridge holder, hold the FINE cartridge holder and slide it slowly to the right edge or the left edge.
4. Hold the jammed paper with your hands.
If the edge of paper is jammed near the paper output slot, pull the edge of paper to the position where you can hold it with your hands.
5. Pull the paper slowly not to tear it, then pull the paper out.
6. Make sure that all the jammed paper is removed.
If the paper is torn, a piece of paper may remain inside the machine. Check the following and remove the piece of paper if it remains.
7. Close the paper output cover, then reload the paper.
All print jobs in the queue are canceled. Reprint if necessary.
Troubleshoot this issue step by step:
Check the Feed Selection Lever:
Ensure that the Feed Selection Lever (located on the lower left side of the front of the scanner) is in the correct position (up) for separation.
Straighten the edges of the stack of documents to be scanned.
Set the document guides so they are wider than the document to be scanned.
Place the documents face up into the feed tray, ensuring they touch the document stoppers.
Clear Any Jammed Paper:
Be careful when removing jammed paper to avoid cuts.
Remove any documents that have been left in the eject tray.
Close the document eject tray.
If the document ejection is stopped partway, perform this operation with the document eject tray extension open.
Hold the upper unit as shown in the diagram and open it to the point where you can remove the jammed document. The pickup roller is located in the middle of the upper unit. Do not hold the protrusion on the upper unit when opening it, as it may deform the pickup roller or cause a feeding error.
Close the feeder cover.
If the jam occurred in the feed section, pull the document out carefully without applying too much force. Be sure to remove any torn parts remaining in the scanner.
Close the upper unit slowly, ensuring it clicks into place. Do not force it to close, as this may damage the scanner.
After removing the jammed paper, check if the last page was scanned, and then continue scanning.
Rapid Recover System:
If a paper jam occurs when the "Rapid Recover System" is enabled in the ISIS/TWAIN driver settings, the image of the document is not saved, and scanning stops. You can continue scanning from the document that caused the paper jam after fixing the issue.
Additional Considerations:
Make sure the pickup rollers retract when the machine is powered on.
Check that the stopper plates are in the down position.
Verify that the upper unit is completely closed after clearing the jam.
Remember to handle the scanner components carefully to avoid damage. If the issue persists, consider seeking professional assistance or contacting Canon support for further guidance
I would use a soft toothbrush and a little Isopropyl Alcohol and then a lint free cloth and then give another gentle brush. There are some other ideas here. Take no notice of the answer by 'Marvin' on Fixya about dropping the head in boiling water, I think he thinks he is dealing with a colour inkjet printer.
https://www.google.com/search?q=canon+p23-dh+v+printing+calculator+clean+print+head
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You mentioned that you have already replaced the Laser Unit, but the error persists. Here are a few more steps you can try:
Check the cable: Ensure that the cable connected to the Laser Scanner Unit is properly attached and not damaged.
Replace the DC Controller PCB (PCB4): If the error still persists after checking the cable and replacing the Laser Scanner Unit, you might need to replace the DC Controller PCB (PCB4)
Here are some YouTubes that may help - once you get past ads.
Exciting New Discovery (youtube.com)
How to fix error code E110 in Canon ImageRunner Cantina IR
2520 2525 2530 #canon #subscribe (youtube.com)
If your Canon iPF605 printer won't enter service mode and gets stuck at the "S" symbol without initializing, it may indicate a firmware or hardware issue. Consider updating the firmware or contacting Canon support for further assistance.
Question edited for clarity and add CAPS.
Is there a paper roll in it? I have seen them do this as the calculator is trying to feed the roll edge. You can turn printing off, but most need a roll in place. There is a repair video for a similar machine.
https://www.google.com/search?q=Canon+MP27D+Printing+Calculator+continues+running
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The E732-001 error on a Canon iR 3225 indicates an issue with the fixing assembly temperature. Here are some steps to troubleshoot and resolve this error:
Reset the Condition:
Enter service mode by pressing the following sequence on the control panel: COPIER > FUNCTION > CLEAR > ERR.
This will reset the error condition. If the message disappears, your printer is ready to use. If this doesn't work, there may be a hardware problem as addressed below.
Replace the Main Thermistor:
The main thermistor is responsible for temperature sensing. If it's faulty, it can trigger the E732-001 error.
Consider replacing the main thermistor to resolve the issue.
Check the DC Controller PCB:
If the problem persists, inspect the DC controller PCB for any defects or malfunctions.
Replacing the DC controller PCB may be necessary.
Remember to turn off the printer before performing any maintenance tasks. If the error persists or if you need further assistance, I recommend contacting your local authorized Canon dealer or the Canon Customer Support Center for professional service