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System Board Removal
1. Remove the top cover.
2. Disconnect the print head cables from the system board. You
may have to open the print head cable connectors on the system
board first, then disconnect the cables.
3. Disconnect connectors J4, J5, and J6 from the system board. 4.
Remove the machine from the base. To do this, push the frame
latches out as you lift the machine from the base. Set the
machine aside.
4. Disconnect the power supply cable from the system board.
5. Remove the 6 system board mounting screws and remove the
system board.
6. Check the bi-directional alignment adjustment.
After replacing the system board, reset the printer to the factory
defaults as follows:
For countries using 8.5 x 11 paper:
1. Turn off the printer.
2. Hold down the Form Feed, Line Feed, and Install Ink Cartridge
buttons and turn on the printer. Continue to hold down the but-
tons until all the lights are off.
3. Check the bi-directional alignment.
For countries using A4 paper:
1. Turn off the printer.
2. Place a piece of paper in the manual feed slot to push the EOF
flag out of the sensor.
3. Hold down the Install Print Cartridge, Form Feed and Draft/Letter
Quality buttons and turn on the printer. Continue to hold down
the buttons until all the lights are off.
4. Check the bi-directional alignment.