There are streaks on the side of the printed page

The instructions as copied from the Pixma 480 "onscreen manual." (Only the text -- not the images -- could be pasted into the solution. Hope you can follow the text.) Steve G.

Prepare 2 sheets of A4 or Letter-sized plain paper

1. Make sure that the power is turned on, and load 2 sheets of A4 or Letter-sized plain paper in the Rear Tray.

2. Open the Paper Output Tray gently, and open the Output Tray Extension.

3. Print the print head alignment pattern.
- Press the Menu button.
- Select Maintenance, and press the OK button.
- Select Print head alignment, and press the OK button.
Note: To print the current head position adjustment values, select Head alignment print in the Maintenance menu and press the OK button. See Selecting Menus on the Top Menu Screen.)
- Select Yes, and press the OK button to print alignment sheet.
- Check the pattern is printed correctly, select Yes and press OK button.
- Confirm the displayed message and press the OK button.

The Print head alignment screen appears.

4. Adjust the print head position.
- Check the printed patterns, and use the (Left) or (Right) button to select the number of the pattern that has the least noticeable streaks for column A.
Note: If it is difficult to select the best pattern, select the pattern that has the least noticeable white streaks.
(A) Less noticeable vertical white streaks
(B) Noticeable vertical white streaks
(C) Less noticeable horizontal white streaks
(D) Noticeable horizontal white streaks
- Repeat the same procedure to input the pattern number for each column from B to L, then press the OK button.
- Select Yes to continue printing, and press the OK button.
- The second page of print head alignment sheet will be printed.
- Confirm the message for print head alignment, and press the OK button.
- Check the printed patterns and use the (Left) or (Right) button to input the number of the pattern that has the least noticeable horizontal streaks for column M.
- Repeat the same procedure to input the pattern number for each column from N to R, and press the OK button.

If you put Tray 2 in Tray 1's spot with the heavy stock in Tray 1 (now in tray 2's spot) and print from it, does the problem persist?

This may help...
http://www.support.xerox.com/support/phaser-7500/support/enus.html?objGUID=4538

Had a similar problem. Tried lost of things. In my case, the streaks cleared up after I cleaned the toner drum.

Hello sir; Either drum cleaning blade or drum cartridge needto replace.

if one side prints well its not the fuser,plus those fusers normaly make alot of noise when they start to act up. right above the bypass tray is a cover with a screw in the front of it. remove this and inside is the ITB belt(two blue handles) if you pull it out there is a metal plate on the bottom bending this up can solve this problem. the paper can drag across this plate causing streaks.hope this helps.

What I would do is remove all cartridges, wipe the belt w/clean cloth use an air can to clean the machine, check the drum on each cartridge see if there is something, it could be there was a change in Voltage and it burnt the drums. change 1 more toner cartridge to see if that color goes away, if it does then you will know if the drums are the problems.
I've had a problem w gen toners doing the exact same thing, so I had to OEM and it went away. Good luck>

Your yellow problem sounds like a bad yellow developer housing. Take the drum out and look at the developer housing, You will need a flash light to do so. See if the roller is solid yellow. Even if it is there may not be any developer left in the housing.
The Cyan sounds like the drum since it gets worse as it prints.
That can also be caused by the transfer belt cleaner. But that normally is the opposite. It has a rainbow sort of streak and it gets better as the machine runs.

Have you setup for double-sided printing?

REPLACE DRUM CARTRIDGE THE CLEANER BLADE IS BAD

Solution Title: How to print on COM10 envelops from the Bypass tray (PCL6) using a Windows 2000 O/S Resolution/
Solution Fixed! Did not fix. Resolution Role: Fix
Critical Message: The Envelope must be placed in the Bypass Tray face down (flap side up) and Long Edge IN. In Microsoft Word (Word 2000)

1. Under the Tools tab, select Envelopes and Labels.
2. Enter your Delivery and Return addresses.
3. Click on Options
4. Under Envelope Options; [Envelope size], select Size 10 (41/8 x 91/2 in)
5. Under Printing Options, select Portrait (LEF) - Long Edge Feed
   • As Feed from, select Tray 5 (Bypass)
6. Click <OK>

Within the WorkCentre Pro 123/128 print driver
After opening up the print driver [<Start>, <Settings>, <Printers>, double-click on the WCP 128 PCL6 driver], click on Printing Preferences under the General tab.

• Under the Paper/Output tab

Set the following features as follow:

• Job Type: Normal Print
• Paper Size: COM10
• Output Size: Same as Paper Size
• Image orientation: Portrait
• Image Rotation: OFF
• 2 sided Print: 1 sided Print
• Stapling: None
• Output destination: Center Output Tray
• Offset Stacking: None

• Under Tray/Layout

• Set Paper Source to Tray 5 (Bypass)
• Click on Bypass Tray Settings
  • Paper Type: Heavyweight (1 or 2)
  • Feed orientation: Portrait
• Click <OK>
• " on Specify Paper Type and select Heavyweight (1 or 2)
• " (Apply> and <OK>
• " <OK> again

In Microsoft Word under Envelopes and Labels, Click <Print> to send the information to the printer.

Note: This setup represents one way of printing envelopes. Other ways setting up some features in a different manner will work as well.

Solution v1.3.20.0 312637.How to Print on COM10 Envelops From the Bypass Tray (PCL6) 2006-04-05 21:57:29