Not clear printing

the problems is the transfer belt.Clean the transfer belt and clean the image unit all colors.

Before refilling, clean entire cartridge units. Remote its cleaning blade and clean it with an IP solutions and make sure no bends in cleaning blade. Do not mix new toner powder with old one. Also clean plastic portion below the developer roller also. Then the same complaint found, clean the LSU unit of the machine. Now it work properly.

- The service mode functions are same as those of the previous models.
1) Test pattern 1: Service test print pattern 1 will be printed.
2) Test pattern 2: Service test print pattern 2 will be printed.
3) Test pattern 3: Service test print pattern 3 will be printed.
4) Cleaning at the service test print: Check the Cleaning box and perform the service test print.
Cleaning will be performed before the service test print is printed.
5) EEPROM initialization at the service test print: Check the EEPROM Clear box and perform the
service test print. EEPROM will be initialized.
6) Destination setting: Select the device ID to set the destination.
7) Ink absorber counter resetting (Main): Main ink absorber counter will be cleared.
8) Ink absorber counter resetting (Platen): Platen ink absorber counter will be cleared.
9) Device ID acquisition: Device ID will be displayed on the PC.
10) EEPROM information acquisition (Dump): EEPROM information will be displayed on the PC with
the HEX dump.
11) EEPROM information acquisition: EEPROM information will be displayed on the PC.
12) Nozzle check pattern print: Nozzle check patter will be printed.
13) Cleaning A: Cleaning A will be performed.
14) Cleaning B: Cleaning B will be performed.
15) Cleaning C: Cleaning C will be performed.
16) Cleaning D: Cleaning D will be performed.

1. Shake ink cartriage and Re-clean the print head, dripping alcohol to drain off and wipe clean w/tissue (do not touch with fingers).
2. Apply slight suction to print head to clear clogged ink (if by mouth, spit out ink and water rinse etc.).
3. Re-clean per step 1
4. Insert ink cartiriage, seating it all the way into holder.
5. Run a "cleaner sheet" through printer to clean al printing parts
("cleaner sheets" are available at office supply stores).
6. Printer should print all parts of letters.

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

Run the printer through a "nozzle clean" cycle. If this doesn't clear the problem, if you can see beneath the print head (the part that moves back and forth inside the printer) check to be sure some dust or paper chip may be blocking a portion of the output nozzles.

well you can try cleaning the rollers at the bck of the printer with a wet cloth and then try aligning the cartridges again..this should help.

its the error in the driver u have loaded in the pc.it has to be reloaded to make this problem clear.

You've got clogged heads, remove the heads submerse just the "head" portion in rubbing alcohol for 15 mins and clean by taking microfiber cloth (it will get ruined) and wipe in one direction (with the grain of the printing head) and allow to dry. Make sure all copper contacts are clear of ink and without fibers from cloth etc.

1st how old are the cartidges ink could be solidified.
2nd did you take the plastic off of the new ink heads?
try runninng clean pint heads from printer control