Display Rear Housing Adjustment. Apple FW800, PowerBook G4 (12-inch 1.33GHZ

Display Rear Housing

Adjustment

Overview

Earlier display rear housing parts include a shim set on each side of the logo diffuser on the inner side of the housing. New replacement display housing parts include a new softer diffuser and no shim set. When you are replacing an LCD panel in a display assembly, you must either replace the display housing with a new display housing, or remove the shim set and replace the diffuser on the existing display housing. Follow this procedure to modify an earlier display housing.

Tools

This procedure requires the following tools:

• LCD panel with new softer diffuser

• Black stick (or other non-marring nylon or plastic pointed tool)

• Cloth rag

• Solvent to remove adhesive (such as Goof-Off goo remover)

• Fine-point permanent marking pen with black ink

• Compressed air

• Logo diffuser 922-6342 (included with replacement LCD panels)

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Preliminary Step

Before performing the display rear housing adjustment, check the current housing. If it appears as shown below (with a set of shims on both sides of the logo diffuser), continue with the procedure.

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Procedure

Important: The logo diffuser protects the Apple logo on the back of the housing. To protect the logo from damage, do not remove the diffuser until after the sets of shims have been removed.

1. Using a black stick, start to loosen the two sets of shims.

2. With one end loosened, peel up the sets of shims.

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3. If part of the foam strip sticks to the housing, remove it with a black stick or your fingers.

4. If a patch of adhesive remains on the housing, use a small amount of solvent on a rag to clean off the area.

5. Rub the patch until the adhesive is gone and the housing is clean.

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6. With the two sets of shims removed, the housing should appear as shown below with the square diffuser in the center of the display housing.

7. To prepare the housing for placement of the new diffuser, use a permanent marking pen along the four sides of the diffuser.

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8. Using a black stick, carefully pry up the diffuser foam at one corner, and pull it back.

9. Use the black stick to loosen all four sides of the diffuser. Be careful not to mar the logo.

10. Pull the diffuser off.

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11. Important: Before applying the new diffuser, make sure nothing adheres to the clear plastic window. If necessary, use an air compressor to remove any dust or particles.

12. Check both sides of the replacement diffuser to make sure it is completely clean.

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13. Remove the backing on the foam strips.

14. Because the diffuser is square, you may orient it in any way as long as it aligns with the pen lines on the housing. Place it straight against one line, and allow the foam strips to adhere to the housing and match up to the other pen lines.

Important: To avoid creating pressure points on the LCD panel, the adhesive foam must not ride up onto the plastic of the logo at any point, even slightly. Check this by running your finger along the foam. If it goes over the logo plastic, reapply the diffuser.

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15. With the diffuser secured on the housing, peel up the clear, protective film backing if it is installed. The backing will appear wrinkled if it is in place.

16. To make sure that the diffuser is installed correctly, hold the display housing up to a strong light and visually inspect the position of the foam strips to the clear plastic window. If you see an overlap, remove the diffuser and make sure a new one is installed correctly.

17. As a final check, turn over the housing and inspect the Apple logo for contamination.

The logo should be uniformly white.

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Service Source

Take Apart

PowerBook G4 (15-inch FW 800)

PowerBook G4 (15-inch 1.5/1.33GHz)

© 2004 Apple Computer, Inc. All rights reserved.