Vertical Raster Shift

The raster moves up so the menu bar is no longer visible. Use the following procedure to replace the IVAD (Integrated Voltage Analog Data) cable:

1.
Remove the rear housing from the eMac.

2.
Discharge the CRT.

NOTE

Warning: The eMac contains high voltage and a high-vacuum picture tube. To prevent injury, follow the discharge instructions in Lesson 10, “Cathode-Ray Tubes.”

3.
Locate the IVAD assembly, shown in the following photograph. Remove the screw (circled in the photograph) and then remove the metal cable cover.

NOTE

You must remove the screws on the IVAD assembly to access one end of the IVAD cable.

4.
Remove the remaining two screws on the IVAD assembly.

5.
With a nylon probe tool or needlenose pliers, remove the glue from the connector.

NOTE

If you find removing the glue difficult here or in step 7, use a heat gun to soften the glue a bit and then remove it. Disconnect the cable after removing the glue.

6.
Locate the other end of the IVAD cable.

7.
With a nylon probe tool or needlenose pliers, remove the glue from the cable connector.

8.
Clip the cable tie. Disconnect the IVAD cable from the board.

9.
Install the replacement IVAD cable.

10.
Replace the cable tie (shown in the previous photo).

11.
Place hot glue on each end of the IVAD connector.

12.
Reassemble the computer and test the system.

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