Paper shifts When coping a page I don't get about 1" of the side. It's like the paper shifts.

Run this paper from the bypass tray located on the right hand side of the machine.
Try setting that paper type on the copier itself.
Load the paper. Go to the manual paper tray select screen. Select tray 1 and then change paper settings.
Glossy paper also tends to slip in these machines when the paper tray rollers are bad.

To remove the paper jam, follow the procedure---
1. Open the front cover.
2. Remove the cartridge.
3. Open the face up cover and push down the green paper release levers on both sides of the face up paper output.
4. Hold sides of the jammed paper and carefully move it inward then gently pull out.
5. Remove if any paper bits present near the rollers.
6. Don?t pull the paper upwards but straight between the rollers.
Please check page#62 for details in the manual---
Canon Super G3 Fax

Seems like the rollers are either dirty, or worn out. Probably the latter.
• “Paper jams” on page 68
• “Paper or specialty media misfeeds” on page 68
• “Printer does not feed paper, envelopes, or specialty media” on page 69
• “Banner paper jams” on page 69
Paper jams
Is the jam in the paper
support?
1 Press to turn off the printer.
2 Firmly grasp the paper, and gently pull it out.
3 Press to turn the printer back on.
Is the jam in the printer? To automatically eject the paper:
1 Press to turn off the printer.
2 Press again to turn the printer back on.
The paper automatically ejects from the printer.
To manually remove the paper:
1 Press to turn off the printer.
2 Firmly grasp the paper, and gently pull it out.
3 Press to turn the printer back on.
Paper or specialty media misfeeds
If paper or specialty media misfeeds or skews, or if multiple sheets feed or stick together, try the following solutions.
Check paper
condition
Use only new, unwrinkled paper.
Check paper loading • Load a smaller amount of paper into the printer.
• Load paper with the print side facing you. (If you are not sure which side is the printable
side, see the instructions that came with the paper.)
See “Loading various paper types” on page 21 for information about:
• Maximum loading amounts per paper type
• Specific loading instructions for supported paper and specialty media
Troubleshooting
68
Remove each page as
it is printed
Remove each page as it exits, and let it dry completely before stacking.
Adjust the paper
guides
Adjust the paper guides:
• When using media less than 8.5 inches wide
• To rest against the edges of the paper or media, making sure it does not buckle

That is the way duplexing works. Both sides of the page are read into memory and then the second page prints followed by the first page after the paper turns around.

Turn you paper stack over so the the 2nd. page prints correctly on the page and the first page should be fine. If it does not, please let me know and we can take some steps to look at the data going to the printer.

Don

Hello
See if you have selected weight paper from the tray in the duplex mode.
Weight paper is selected in duplex mode only from the bypass.
So you check that the paper in the tray 1 or tray 2 must be plain paper and in duplex mode it can print normally.

If you put your hand inside there will be a paper picking Roller (rubber) clean them with the spirit ..
or with the wet Towel ..
which will solve your issue
if still not then follow the paper Jam steps - cleaning the rubbers when you open the rear
....
will solve your issue

1. Turn off the product and unplug the power cord.
2. Turn the product around to access the back of the product.
3. Open the rear access door:
1. Locate the tab on the left side of the door and press it toward the right. The door will shift slightly to the right.
2. As the door shifts to the right, pull the door out slightly to release.
3. When the door is released, gently remove the door by sliding the door out and to the left.
4. From the rear access opening, gently pull the jammed paper out of the rollers.
NOTE: If the paper tears when you are removing it from the rollers, check the rollers and wheels for torn pieces of paper that might be remaining inside the product. If all the pieces of paper are not removed from the product, more paper jams are likely to occur.
5. Replace the rear access door:
1. Insert the two posts on the right of the door into the holes on the right side of the opening.
2. Press the tab on the left side of the door toward the right. The door will shift slightly to the right.
3. As the door shifts to the right, push in the left side of the door to lock it into position.
6. Reconnect the power cord and turn the product on.

While coping A3 paper it result in A4 portrait not in landscape which is incomplete.How to manage it?

this sounds like you have ink on the paper look inside and clean the paper feed rollers with denatured alcahol found at the local hardware store

no way. the paper feeder of machine recognices the paper edges. there is no way to compute the exactly positon for different papers.

It is possible that the guides in the paper tray have moved?

If they are universal trays (meaning they are not locked down to only use one particular size), they could have easily shifted, causing what you have described.

Try copying using a sheet of paper through the bypass tray, and see if the image is centered. This will at least narrow down the problem to a particular tray.