Apple eMac 2004 original Service Manual

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Service Source

eMac

updated 15 January 2004

eMac -

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Service Source

Take Apart

eMac

Tools

The following tools are recommended for the take apart procedures.

• 2.5 mm hex (for rear housing)

• phillips #2 screwdriver

• jeweler’s screwdriver set

• needlenose pliers

• ESD wriststrap and mat

• CRT discharge tool

Note:

Do not use a power driver on the rear housing screws.

Tools

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CRT Neck/Display/Analog Assembly Handling Information

Handling

Important:

when working with the display/analog assembly.

Do NOT lift, handle, bump, or manipulate the CRT neck/neck board (see red arrows below) on the Display/Analog assembly. Modules damaged by mishandling are NOT covered by Apple Warranty. Apple Authorized Service Providers can be liable for broken CRT necks due to improper handling.

Caution

handling the assembly. Lift the assembly from the metal chassis; never lift the assembly from the neck. I

It is imperative that proper handling and packaging guidelines be followed

: The metal chassis has sharp edges, you may want to wear gloves when

eMac Take Apart

Packing a Defective Display/Analog Assembly

The packing procedure is included with the replacement display/analog assembly. Incorrect packaging can result in damaged eMac displays. Please read and follow the directions enclosed in the shipping box of the new display prior to packaging the defective assembly. AASPs can be liable for broken CRT necks due to improper packing and handling.

CRT Neck/Display/Analog Assembly Handling Infor-

User Access Door

Tools

This procedure requires the following tools:

• Phillips #2 screwdriver

Part Location

User Access Door

Preliminary Steps

Before you begin, do the following:

• Place the computer face down on an ESD mat.

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Procedure

1. Remove the screw on the user access door

2. Gently remove the access door.

eMac Take Apart

User Access Door

Feet

Tools

This procedure requires the following tools:

• Phillips #2 screwdriver

Part Location

Feet

Preliminary Steps

Before you begin, do the following:

• Place the computer face down on an ESD mat.

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Procedure

1. Remove the two screws. Set the plastic feet aside.

eMac Take Apart

Feet

Rear Housing

Tools

• 2.5 mm hex.

Part Location

Rear Housing

Preliminary Steps

Before you begin, do the following:

• Place the computer face down on an ESD mat.

• Remove the feet.

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Procedure

1. Remove three screws located below the user access door (these three screws are longer that the rest of the rear housing screws).

2. Remove the six remaining rear housing screws.

eMac Take Apart

Rear Housing

3. Gently lift the rear housing up about 2 inches. the power button (on the inside of the housing) can become permanently damaged or the machine may not power on.

Warning:

If you lift the housing too fast,

4. Carefully disconnect the power cable from the power button located inside the rear housing. Lift the rear housing off the computer.

Rear Housing

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Power Button

Tools

• needlenose pliers

•

Note:

Follow this take-apart procedure only if you are replacing a defective power

button.

Part Location

eMac Take Apart

Preliminary Steps

Before you begin, do the following:

• Place the computer face down on an ESD mat.

• Remove the feet.

• Remove the rear housing.

Power Button

Procedure

1. Disconnect the power cable from the power button located inside the rear housing. Lift the rear housing off the computer.

Note:

Continue with this procedure only if you are replacing a defective power button. With a needlenose pliers, push the power button through the retaining ring. The power button will pop off rear housing and the retaining ring may get stuck on the pliers.

Power Button

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3. Save the retaining ring (shown below)

Replacement Note:

power button. Position the power button into the hole on the rear housing (as shown below). rear housing.

Note:

The picture below is looking at the power button from the inside of the

Obtain a new power button and peel the sticky backing off the

eMac Take Apart

5. Place the retaining ring over the power button connector and press down ﬁrmly.

Power Button

CRT Discharge

Warning:

injury, always review the Service Foundations: CRT Displays course for safety information. It can be found at: http://service.info.apple.com/service_training/training.html. Click on Desktop Certification Courses and select the Service Foundations: CRT Displays link.

Warning:

an ongoing ground connection.

This product contains high voltage and a high-vacuum picture tube. To prevent

Never use a grounding wriststrap until after discharging the CRT and setting up

Safety Guidelines:

Whenever the rear housing of the computer is removed and before replacing a module, you must

1. Discharge the CRT (shown below) and remove the anode cap.

CRT Discharge

2. Establish an ongoing ground by using a cable with alligator clips at both ends. Connect one end to the anode aperture, and connect the other end to the metal CRT frame (as shown below).

3. With the CRT discharged and the ongoing ground in place wear a grounding wriststrap to prevent equipment damage from static electricity.

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Speakers

Tools

This procedure requires the following tools:

• Jeweler’s #1 screwdriver (for removing metal plate on speaker assembly)

Part Location

eMac Take Apart

Preliminary Steps

Before you begin, do the following:

• Place the computer face down on an ESD mat.

• Remove the user access door.

• Remove the feet.

• Remove the rear housing.

• Discharge the CRT.

Speakers

Procedure

Note:

The speaker assembly is not screwed down. Gently pull the speaker assembly

in the direction of the arrow.

2. Disconnect the speaker cable on the left side. Lift the speaker assembly out of the computer.

Speakers

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Fan

Tools

This procedure requires the following tools:

• Phillips #2

Part Location

eMac Take Apart

Preliminary Steps

Before you begin, do the following:

• Place the computer face down on an ESD mat.

• Remove the user access door.

• Remove the feet.

• Remove the rear housing.

• Discharge the CRT.

Fan

Procedure

1. With the fan facing you, disconnect the two circled screws and disconnect the fan cable.

2. On the right side of the fan, remove two screws (one of which is the ground screw), and disconnect the fan power cable

Fan

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3. To locate the last fan screw, turn the computer so the anode socket is facing you. You’ll see two screws. Remove the top screw.

4. To remove the fan, turn the computer so the fan is facing you. Grab onto the fan near the AC plug and the bottom right corner of the fan. Gently pull the fan toward you and away from the chassis. Be very careful of the CRT neck.

eMac Take Apart

Fan

Faraday Cage

Tools

This procedure requires the following tools:

• Phillips #2

Part Location

Faraday Cage

Preliminary Steps

• Place the computer face down on an ESD mat.

• Remove the user access door.

• Remove the feet.

• Remove the rear housing.

• Discharge the CRT.

• Remove the fan.

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Procedure

1. Remove the ﬁve screws. cage so it doesn’t get caught when you remove the Faraday cage.

Important:

Push the power button cable inside the Faraday

2. Gently pry the Faraday cage away from the chassis in the direction of the arrows.

eMac Take Apart

Faraday Cage

Digital Module Assembly

Tools

This procedure requires the following tools:

• Phillips #2

Part Location

Preliminary Steps

Before you begin, do the following:

• Place the computer face down on an ESD mat.

• Remove the user access door.

• Remove the feet.

• Remove the rear housing.

• Discharge the CRT.

Digital Module Assembly

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• Remove the fan.

• Remove the Faraday cage.

• Remove the AirPort Card if installed.

eMac Take Apart

Digital Module Assembly

Procedure

1. With the digital module facing you, remove the four screws on the left side of the digital module.

2. Next, remove the three screws on the right side.

Digital Module Assembly

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3. On the top right side of the digital module, remove one screw.

4. On the top left side of the digital module, remove one screw.

eMac Take Apart

Digital Module Assembly

5. Remove one screw on the I/O panel and disconnect the video cable located above the screw. Squeeze the tabs to disconnect the video cable.

Note:

Remove the AirPort card if it’s installed. Grab onto the digital module at the tabs circled below. Pull in the direction of arrow. The digital module is connected to blindmate connectors. It’s a tight ﬁt, so pull hard.

Digital Module Assembly

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IVAD Cable

Important:

from the bottom of the display or the raster is jumpy, otherwise leave the cable alone. Refer to Knowledge Base article 95168 for more information.

Take Apart Note: Replace the IVAD cable if the eMac raster shifts upward

Tools

This procedure requires the following tools:

• 2.5 mm hex tool

• Phillips #2 screwdriver

• Hot-melt glue gun (recommended)

• Nylon probe tool (922-5065)

Part Location

eMac Take Apart

Preliminary Steps

Before you begin, do the following:

• Place the computer face down on an ESD mat.

• Remove the user access door.

IVAD Cable

• Remove the feet.

• Remove the rear housing.

• Discharge the CRT.

• Remove the fan.

• Remove the Faraday cage.

• Remove the AirPort Card if installed.

• Remove the digital module assembly.

IVAD Cable

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