Apple imacg5 17 isight Service Manual

 Service Source

iMac G5 (17-inch iSight)

Updated: 12 April 2007

© 2005 Apple Computer, Inc. All rights reserved.

iMac G5 (17-inch iSight)

Contents

Take Apart

General Information 6

Product View 6
Tools Required 6
What’s New? 7
Orientation
Serial Number Location 7
Safety 9
Opening the Computer 10
Access Tool Modication 10
EMI Shielding 13
Lower EMI Shield 14

Access Door and Memory 16

7

Front Bezel 19

Camera Board 2

6

Lower EMI Shield 28

IR Board 3

0

LCD Display 32

TMDS Cable 39

Inverter 4

2

Speakers 46

CPU Fan 4

9

Optical Drive 51

Hard Drive 6

DC-DC Board 6

Power Supply 7

1

7

0

ii

Logic Board 74

Optical Drive Fan 82

Hard Drive Fan 84

AC Power Inlet 86

Ambient Light Sensor Board 90

Clutch 94

Wireless Antenna 99

DC Power Cable 103

Camera Cable 106

Chassis 110

Rear Housing 114

Troubleshooting

General Information 116

Serial Number Location 116
Accessing the Diagnostic LEDs 117
Testing Under Power 123
SMU (System Management Unit) 125
Resetting the SMU (System Management Unit) 125
Ports 126
DDR Memory 126

Symptom Charts 127

How to Use the Symptom Charts 127
Power Issues 128
Verbose Startup Mode 131
No Video 132
LCD Display 135
Hard Drive 136
Optical Drive 137
Fan Sound 142
AirPort/Bluetooth 145
IR Remote 147
IR Sensor/Receiver 148
Built-in iSight Camera 149
Speakers 151
Mouse 153

iii

Keyboard 154
Error Beep(s) 155
USB 156

Views

iMac G5 (17-inch iSight)—Upper Exploded View 158
iMac G5 (17-inch iSight)—Lower Exploded View 159

Screw Chart 160

iv

 Service Source

Take Apart

iMac G5 (17-inch iSight)

© 2005 Apple Computer, Inc. All rights reserved.

Product View

General Information

Tools Required

The following tools are required to service the computer. Note that a special access card (part
922-7172) is required to open the front bezel.

ESD-safe workstation and mat

•
Soft, clean towel or cloth (to protect the display and removed parts from scratches)

•
Access card (part 922-7172)

•

“black stick” (or other nonconductive nylon or plastic at-blade tool)

•
Phillips #1 screwdriver

•
Phillips #2 screwdriver

•
Torx T8 screwdriver (magnetized)

•
Torx T6 screwdriver (magnetized)

•
Torx T10 screwdriver (magnetized)

•
Flat-blade screwdriver

•

iMac G5 (17-inch iSight) Take Apart — General Information 6

What’s New?

April 2007

The optical drive removal procedure has been updated. Using a screwdriver to release the

•
optical drive tabs is causing damage to the logic board. The updated procedure shows how
to remove the optical drive using a needlenose pliers.
Information on handling slot-load optical drives has been added to the optical drive

•
section.
Reset PRAM to prevent verbose startup in iMac G5’s with a new logic board.

•

January 2007

The logic board Take Apart chapter was updated with information on proper handling of the

•
logic board. Damage to the logic board will void the warranty. Handle the logic board with
care. Support the logic board as shown in the logic board Take Apart.

August 2006

Updated the Hard Drive section in the Take Apart chapter. Note: Make sure to transfer the

•
temperature sensor to the replacement hard drive. Use the double-stick tape enclosed with

the replacement hard drive to attach the sensor.

Orientation

For most repairs, the unit should be placed screen-side up, with the bottom facing toward you.

Most photos in this manual reect that orientation. The DIMM slot is located beneath the front

bezel and is more easily accessed with the unit face-down on a soft, clean cloth.

Serial Number Location

iMac G5 (iSight) serial numbers are located on the bottom of the computer stand as shown
below.

iMac G5 (17-inch iSight) Take Apart — General Information 7

iMac G5 (17-inch iSight) Take Apart — General Information 8

Safety

Warning: When the iMac G5 (iSight) is under power, be aware that the power supply contains
high voltages that pose a potential hazard to your personal safety. Never work on or near the
power supply with the unit powered on, and as a further precaution always make sure the unit is
unplugged when working on it with the front bezel removed.

WARNING: HIGH VOLTAGE
Text or photographs marked by this symbol indicate that a potential hazard to your personal
safety exists from a high voltage source.

The AC/DC power supply board is a high voltage source with the unit under power, and remains
powered up whenever the system is plugged in, whether or not the system is turned on. Use
extreme caution when troubleshooting the system with the front bezel removed.

Disconnect power to the system before performing maintenance.

•

Don’t work alone. In the even of an electrical shock it is important to have another

•

individual present who can provide assistance.
Keep one hand in your pocket when working on any iMac G5 (iSight) that is plugged in.

•

This will help ensure that your body does not provide a path to ground in the event that
you accidentally make contact with the line voltage.
Don’t wear jewelry, watches, necklaces, or other metallic articles that could present a risk

•

if they accidentally make contact with the power supply circuitry.

iMac G5 (17-inch iSight) Take Apart — General Information 9

Opening the Computer

Apple authorized, desktop certied technicians only should ever remove the front bezel on the

iMac G5 (iSight). When the front bezel is removed, be sure to always ground yourself and follow
ESD-safe repair practices

Removing the front bezel requires using a special access card (part 922-7172) to release latches
located inside the upper corners of the front bezel. Slightly bending the upper quarter of the
access tool card will help engage the latch more securely.

As you are inserting the card to disengage the latch you should squeeze the top of the bezel,

that will help take pressure o of the latch and enable it to open easier. Note: If the bezel won’t

open, try cutting the card lengthwise into 3/4 inch or 1.5 cm strips. Insert the card again, aimed
straight up, and try again.

Once the card has been released it is safe to open the bezel. See the Front Bezel Take Apart
procedure for more information.

Access Tool Modication

If you wish to modify the access card tool, order kit 076-1213. The kit contains an access card and
a piece of EMI gasket that can be cut and added to the top of the card. The additional thickness
on the card will improve the chances of making contact with each bezel latch.

Remove the tape on the gasket to expose the sticky side of the gasket. Attach the sticky side

1.
of the EMI gasket to the top of the access card.

iMac G5 (17-inch iSight) Take Apart — General Information 10

Cut the EMI gasket to the edge of the access card.

2.

Using packing tape, or something equivalent, fold the tape over the EMI gasket to attach the

3.
gasket to the card.

iMac G5 (17-inch iSight) Take Apart — General Information 11

Bend the card at a slight angle at the top to make sure the card makes contact with each

4.
latch.

Refer to the Front Bezel take-apart procedure for complete instructions.

5.

iMac G5 (17-inch iSight) Take Apart — General Information 12

EMI Shielding

The iMac enclosure is wrapped in EMI shielding that is easily torn and damaged. To maintain
a properly shielded unit, you must repair all accidental tears and cracks to the shielding by
covering them with EMI tape. Order EMI tape, part number 922-4786 (a long, thin strip) or 922-EMI tape, part number 922-4786 (a long, thin strip) or 922­5026 (short, wide strips).

Cover nicks, such as the those shown below, with EMI tape. Pay particular attention to the EMI
shielding inside the rear housing, shown below. The EMI shield is easily damaged when replacing
modules.

iMac G5 (17-inch iSight) Take Apart — General Information 13

Lower EMI Shield

EMI tape covers the top and sides of the display panel, and the lower EMI shield covers the logic
board along the bottom of the unit. The EMI tape and lower EMI shield are easily damaged when
removed, and removal is necessary in order to access most components within the unit.

Should the EMI tape that seals the display, or the EMI shield covering the bottom of the
enclosure (see photo below) accidentally tear, use EMI tape (922-4786 or 922-5026) to repair and
completely seal the unit.

When properly repaired, all edges shown below will be wrapped by EMI tape, and the tape

securely adhered to all edges. Use a black stick to atten the EMI tape tightly and rub out air

pockets and wrinkles.

iMac G5 (17-inch iSight) Take Apart — General Information 14

iMac G5 (17-inch iSight) Take Apart — General Information 15

Access Door and Memory

Tools

Phillips #2 screwdriver.

•
ESD-safe workstation and mat

•
Soft, clean towel or cloth

•

Preliminary Steps

Shut down the computer and unplug all external cables except the power cord.

1.

Place a soft, clean towel or cloth on the ESD mat. Grasp the sides of the unit and slowly lay it

2.
screen-down on the cloth, with the bottom facing you.

Touch the metal memory access cover to discharge any static electricity from your body.

3.
Important: Always discharge static before you touch any parts such as the memory board.

To avoid generating static electricity, do not walk around the room until you have nished

replacing the memory.

Unplug the power cord and put on an ESD wrist strap.

4.

iMac G5 (17-inch iSight) Take Apart — Access Door & Memory 16

Remove the Access Door and Memory

Raise the stand and use a Phillips #2 screwdriver to loosen the two captive screws that

1.
secure the memory access door. Remove the access door.
Caution: The ambient light sensor is located between the two screws. Don’t mistake the
ambient light sensor for a screw.

To eject any optional memory, pull out simultaneously the two rings protruding from the

2.
memory slot. The memory will poke out from the memory slot. Grasp the memory by its
edges only and remove it.

iMac G5 (17-inch iSight) Take Apart — Access Door & Memory 17

Replace the Memory and Access Door

Grasp the memory module by its edges and insert it into the memory slot as shown below.

1.
Push the edge of the memory module in gently to lock it in place.

Replacement Note: The memory module ts into the slot only one way. When inserted fully,

you should hear a slight click and the two pull rings should retract a bit. Do NOT insert the
memory by pushing in the pull rings.

Position the access door on the rear housing. Lift the stand out of the way and tighten the

2.
two captive mounting screws.

iMac G5 (17-inch iSight) Take Apart — Access Door & Memory 18

Front Bezel

Tools

This procedure requires the following tools:

Access card tool 922-7172

•
Torx T8 screwdriver

•

Preliminary Steps

Before you begin, follow steps for removing the access door.

Remove the Front Bezel

Turn over the unit and place it screen-up on an ESD mat, with the bottom facing toward you.

1.

Tilt up the bezel and use a T8 torx screwdriver to remove the three bezel mounting screws.

2.

iMac G5 (17-inch iSight) Take Apart — Front Bezel 19

Bending the upper quarter of the access tool card slightly will help engage the latch more

3.
securely. Note: Refer to Access Tool Modication in the General Information chapter if the
bezel is dicult to open.

This picture shows how the access tool works. Pushing the tool up the vent on the rear cover

4.
releases the latches on the inside of the front bezel. Refer to the next step for the procedure.

iMac G5 (17-inch iSight) Take Apart — Front Bezel 20

Start on the left side (looking from the back of the unit). As you insert the card to disengage

5.

the latch, squeeze the top of the bezel, that will help take pressure o of the latch and

enable it to open easier. As the bezel releases, pull the bezel away from the rear housing.
Note: If the bezel won’t open, try cutting the card lengthwise into 3/4 inch or 1.5 cm strips.
Insert the card again, aimed straight up, and try again.

Repeat step 5 to release the locking latch in the right corner. Again, pull the bezel away as

6.
the card releases the latch.

iMac G5 (17-inch iSight) Take Apart — Front Bezel 21

If the bezel won’t release, pull the bottom of the bezel out a bit and insert the access card

7.
again.

Repeat step 7 for the left side.

8.

iMac G5 (17-inch iSight) Take Apart — Front Bezel 22

Once the access card has been removed, it is safe to open the bezel. Position the unit on an

9.
ESD mat, with the bottom facing toward you..

Lift the bottom of the front bezel straight up to remove it, and swing the bezel over onto its

10.
top edge so you can disconnect two cables that tether the top of the bezel to the unit.
Caution: Make sure the memory eject rings are not protruding from the bezel when you lift
it or you could bend or damage the rings.

iMac G5 (17-inch iSight) Take Apart — Front Bezel 23

Disconnect the two camera board cables.

11.

If replacing a damaged front bezel, also remove the camera board. See the following

12.
procedure.

Replace the Front Bezel

If necessary, replace the camera board.

1.

Postion the front bezel near the top edge of the unit and connect the two camera board

2.
connectors.

iMac G5 (17-inch iSight) Take Apart — Front Bezel 24

Check and make sure no EMI tape interferes with the locking mechanisms when the bezel is

3.
installed onto the unit. The locking mechanisms must slide into a gap inside the top edge of
the rear housing.

Potition the front bezel around the edges of the unit, push in the memory eject rings, and

4.
press the bezel onto the rear housing.

Note: When pressing the top of the bezel rmly onto the housing you should audibly hear

the locking mechanisms latch onto the housing.

Install the three bezel mounting screws.

5.

Replace the access door.

6.

iMac G5 (17-inch iSight) Take Apart — Front Bezel 25

Camera Board

Tools

The only tool required for this procedure is a Phillips #1 screwdriver.

Preliminary Steps

Before you begin, follow steps for removing the access door and front bezel.

Remove the Camera Board

Using the Phillips #1 screwdriver, peel back tape as necessary and remove the two camera

1.
board mounting screws.

Pull the camera board straight out of the lens aperture in the bezel to remove it.

2.

iMac G5 (17-inch iSight) Take Apart — Camera Board 26

Replace the Camera Board

Carefully align and insert the camera lens until it is snug in the bezel aperture.

1.

Install the camera board to the bezel with two mounting screws.

2.

Replace the front bezel.

3.

Replace the access door.

4.

iMac G5 (17-inch iSight) Take Apart — Camera Board 27

Lower EMI Shield

Tools

The only tool required for this procedure is a “black stick” (or other nonconductive nylon or

plastic at-blade tool).

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•

Part Location

iMac G5 (17-inch iSight) Take Apart — Lower EMI Shield — 28

Remove the Lower EMI Shield

Carefully peel the lower EMI shield o the bottom edge of the rear housing. Use a black stick

1.
to help peel back the shield.

If replacing a torn or damaged lower EMI shield, peel the lower EMI shield o the bottom

2.
edge of the display.

Replace the Lower EMI Shield

Position the lower EMI shield over the bottom of the unit so that the holes in the shield are

1.
properly aligned.

Press the sticky, top edge of the EMI shield onto the bottom side of the display panel. The

2.
crease in the EMI shield should align with the edge of the panel.

Fold down the EMI shield and press it rmly over the bottom edge of the rear housing. Use a

3.

black stick to rub out wrinkles and ensure that the EMI shield adheres rmly along all edges.

Replace the front bezel.

4.

Replace the access door.

5.

iMac G5 (17-inch iSight) Take Apart — Lower EMI Shield — 29

IR Board

Tools

The only tool required for this procedure is a Torx T6 screwdriver (magnetized).

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•

Part Location

iMac G5 (17-inch iSight) Take Apart — IR Board 30

Remove the IR Board

Disconnect the IR cable from the IR board connector.

1.

Using a Torx T6 screwdriver, remove the two IR board mounting screws. Remove the IR board

2.
from its mounting bracket.

Replace the IR Board

Install the IR board and two mounting screws onto its mounting bracket.

1.

Connect the IR cable to the IR board connector.

2.

Replace the lower EMI shield.

3.

Replace the front bezel.

4.

Replace the access door.

5.

iMac G5 (17-inch iSight) Take Apart — IR Board 31

LCD Display

Tools

Removing the LCD display requires using the following tools:

Torx T10 screwdriver (magnetized)

•
Torx T6 screwdriver (magnetized)

•

Black stick (or other nonconductive nylon or plastic at-blade tool)

•

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•

Part Location

iMac G5 (17-inch iSight) Take Apart — Display Panel-32

Remove the LCD Display

Using the black stick, carefully peel back the black, EMI shielding tape from the left and right

1.
top edges of the display panel.

Disconnect the inverter cable from the connector on the logic board.

2.

Using a Torx T6 screwdriver, remove the two TMDS connector mounting screws. Disconnect

3.
the TMDS cable from the logic board.

iMac G5 (17-inch iSight) Take Apart — Display Panel-33

Using a Torx T10 screwdriver, remove the four panel mounting screws.

4.

To remove the display panel, grasp it securely with both hands and pivot it completely over,

5.
as shown, then carefully peel the top edge of the panel away from the EMI skirt.

iMac G5 (17-inch iSight) Take Apart — Display Panel-34

Note: If replacing a bad LCD display, you will also need to remove the lower EMI shield
(if still attached), the display panel mounting brackets, and the TMDS cable as follows.

If attached, peel the lower EMI shield o the bottom edge of the display panel. 6.

iMac G5 (17-inch iSight) Take Apart — Display Panel-35

7.

Using a torx T8 screwdriver, remove two screws from the left side panel mounting bracket.

8.

Using a torx T8 screwdriver, push the tape aside and remove the two mounting screws from
the right side panel bracket as shown below.

iMac G5 (17-inch iSight) Take Apart — Display Panel-36

Peel back the tape where shown below, and disconnect the two inverter-to-display cable

9.
connectors.

Remove the TMDS cable from the rear of the display.

10.

Replace the LCD Display

If necessary, replace the TMDS cable on the rear of the display panel.

1.

If necessary, connect the two inverter-to-display cable connectors and tape them to the back

2.
of the display panel.

If necessary, replace the right panel mounting bracket on the display panel with two screws.

3.

If necessary, replace the left bracket on the display panel with two screws.

4.

iMac G5 (17-inch iSight) Take Apart — Display Panel-37

Push aside any cables that could interfere with the display mounting brackets when lowered

5.
into position.

Make sure the inverter cable extends beyond the bottom of the display panel, and install the

6.
panel with the mounting bracket screw holes and the screw mounts aligned.

Secure the panel with four mounting screws.

7.

Connect the inverter cable connector.

8.

Connect the TMDS cable connector and secure it with two screws.

9.

Fold the EMI tape rmly over the left, top, and right edges of the display panel. Use the black

10.

stick to adhere the tape rmly and rub out wrinkles.

Replace the lower EMI shield.

11.

Replace the front bezel.

12.

Replace the access door.

13.

iMac G5 (17-inch iSight) Take Apart — Display Panel-38

TMDS Cable

Tools

Removing the TMDS cable requires using the following tools:

Torx T8 screwdriver (magnetized)

•

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
LCD Display

•

Part Location

iMac G5 (17-inch iSight) Take Apart — TMDS Cable 39

Remove the TMDS Cable

Locate the TMDS cable on the back side of the display panel, and remove the four pieces of

1.
tape that secure the cable to the panel.

iMac G5 (17-inch iSight) Take Apart — TMDS Cable 40

Pinch together the connector locking levers, and disconnect the TMDS cable connector.

2.

Replace the TMDS Cable

Position the TMDS cable on the back of the display panel as shown in the Part Location

1.
photo above.

Connect the TMDS cable connector. When connected correctly the locking levers will secure

2.
the connector and it cannot be disconnected without depressing the levers.

Secure the TMDS cable to the panel with four strips of tape.

3.

Replace the display panel.

4.

Replace the lower EMI shield.

5.

Replace the front bezel.

6.

Replace the access door.

7.

iMac G5 (17-inch iSight) Take Apart — TMDS Cable 41

Inverter

Tools

Removing the inverter requires using a at-blade screwdriver

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
LCD Display

•

iMac G5 (17-inch iSight) Take Apart — Inverter42

Remove the Inverter

Remove two pieces of tape that secure the inverter cables to the back of the display panel,

1.
and disconnect the inverter connectors where shown.

2.

iMac G5 (17-inch iSight) Take Apart — Inverter43

Using a at-blade screwdriver as shown, pry up the inverter to remove it from inside the

3.
right side display panel mounting bracket.

Remove the inverter cable from the hole in the right mounting bracket to separate the

4.
inverter and bracket.

iMac G5 (17-inch iSight) Take Apart — Inverter44

Replace the Inverter

Insert the inverter cable through a hole at the back center of the right mounting bracket,

1.
and press the sticky side of the replacement inverter onto the back edge of the bracket.
Inverter should look as shown below.

Connect the inverter-to-display cables and tape them to the back of the display panel.

2.

Replace the display panel.

3.

Replace the lower EMI shield.

4.

Replace the front bezel.

5.

Replace the access door.

6.

iMac G5 (17-inch iSight) Take Apart — Inverter45

Speakers

Tools

Removing the speaker requires using the following tools:

Torx T10 screwdriver (magnetized)

•
Torx T6 screwdriver (magnetized)

•

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
LCD Display

•

Part Location

iMac G5 (17-inch iSight) Take Apart — Speaker

Remove the Speakers

Using a T10 torx screwdriver, remove the mounting screws from the left and right speakers.

1.
Replacement Note: The longer of the two speaker mounting screws is used to secure the
left speaker; the shorter screw secures the right speaker.

Using a T6 torx screwdriver, remove the screw that secures the IR board mounting bracket to

2.
the logic board. Remove the IR mounting bracket and attached gold bracket.

iMac G5 (17-inch iSight) Take Apart — Speaker

Lift the left speaker straight up to remove it.

3.
Replacement Note: Note the location and positioning of the speaker cable for reinstallation
later.

Lift the right speaker straight up and disconnect the speaker cable connector from the logic

4.
board.

Replace the Speakers

Install the speakers and route the speaker wire as shown below.

1.

Connect the speaker cable connector to the logic board,

2.

Secure the right speaker with the smaller of the two mounting screws.

3.

Secure the left speaker with the longer of the two mounting screws.

4.

Install the IR board mounting bracket, gold bracket, and screw.

5.

Replace the display panel.

6.

Replace the EMI shield.

7.

Replace the front bezel.

8.

Replace the access door.

9.

iMac G5 (17-inch iSight) Take Apart — Speaker

CPU Fan

Tools

No tools are required to remove the CPU fan.

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
LCD Display

•
Speakers

•

Part Location

iMac G5 (17-inch iSight) Take Apart — CPU Fan

Remove the CPU Fan

Disconnect the CPU fan cable from the logic board.

1.

Lif the CPU fan straight up to remove it from three mounting posts.

2.

Replace the CPU Fan

Align the CPU fan with the three mounting posts in the rear housing, and push it straight

1.
down onto the posts.

Connect the CPU fan cable to the logic board connector.

2.

Replace the speakers.

3.

Replace the display panel.

4.

Replace the lower EMI shield.

5.

Replace the front bezel.

6.

Replace the access door.

7.

iMac G5 (17-inch iSight) Take Apart — CPU Fan

Optical Drive

Tools

Removing the optical drive requires using the following tools:

Torx T10 screwdriver (magnetized)

•
Torx T6 screwdriver (magnetized)

•
Needlenose pliers (with teeth)

•

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
LCD Display

•

Part Location

iMac G5 (17-inch iSight) Take Apart — Optical Drive 51

Remove the Optical Drive

Disconnect the sensor cable from the temperature sensor on top of the optical drive.

1.

Using a T10 torx screwdriver, remove the screw and metal ex cable mounting bracket.

2.
Disconnect the optical drive ex cable from the logic board connector.

iMac G5 (17-inch iSight) Take Apart — Optical Drive 52

Note: Make sure to use a needlenose pliers with teeth to remove the optical drive. The pliers

3.

must have a textured surface to properly grasp the optical drive release tabs.

Locate the black tabs at each side of the plastic optical drive mounting bracket. Starting at

4.
the release tab that is furthest from the logic board, grasp the tab with needlenose pliers,

and ex the tab toward the optical drive exible cable. (Note: This graphic shows a dierent
iMac model, but the removal procedure is the same.) Use one nger underneath the edge of

the optical drive to gently lift up that corner of the drive.

iMac G5 (17-inch iSight) Take Apart — Optical Drive 53

Caution: Never press down on or grasp the body (silver) of the optical drive when removing
or installing it. Depressing the body of the optical drive could damage the mechanism. Grasp
the optical drive by its mounting bracket only.

Warning: iMac main logic boards returned with physical damage such as scratches, fractures,

5.

or broken or missing components caused by improper servicing may be classied as

customer abuse. When using a tool to release the latches, be careful not to apply pressure to
the logic board or it may be damaged.

While avoiding the logic board, grasp the tab with needlenose pliers, and ex the tab toward
the optical drive. Use one nger underneath the rear edge of the optical drive to gently tilt

up the end of the drive and remove the optical drive out of the housing. Note: This graphic
shows a dierent iMac model, but the removal procedure is the same.

iMac G5 (17-inch iSight) Take Apart — Optical Drive 54

If replacing a bad optical drive, use a T6 torx screwdriver to remove two ex cable mounting

6.
screws. Disconnect and keep the ex cable for installation on the replacement drive.

If replacing a bad optical drive, also remove the temperature sensor from the top of the

7.
drive. Discard the sensor—the replacement drive comes with a new sensor already installed.

iMac G5 (17-inch iSight) Take Apart — Optical Drive 55

Handling Slot-Load Optical Drives

Follow the instructions in this section carefully. This procedure shows how to handle slot-load
optical drives when they are outside the computer.

Observe ESD (electrostatic discharge) guidelines when handling optical drives. •

iMac G5 (17-inch iSight) Take Apart — Optical Drive 56

Handle the drive only by the sides and back edge.

•

Do not touch the front of the drive.

•

iMac G5 (17-inch iSight) Take Apart — Optical Drive 57

Do not press on the drive or lift it by the top and bottom cover.

•

Do not handle the drive by the gull wing edge only.

•

iMac G5 (17-inch iSight) Take Apart — Optical Drive 58

When storing optical drives, use approved packaging boxes. Never stack loose drives.

•

When returning a defective optical drive, use the original packaging and an antistatic bag.

•
Pack only one drive per box.

iMac G5 (17-inch iSight) Take Apart — Optical Drive 59

Replace the Optical Drive

If necessary, install the ex cable to the optical drive with two screws.

1.

Insert the optical drive bezel-end-rst into the access hole in the housing. Be sure to align

2.
the two guide holes in the front bezel with guide posts at each end of the drive access hole.

iMac G5 (17-inch iSight) Take Apart — Optical Drive 60

Hard Drive

Tools

Removing the hard drive requires using the following tools:

Torx T8 screwdriver (magnetized)

•
Flat-blade screwdriver

•

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
LCD Display

•

Part Location

iMac G5 (17-inch iSight) Take Apart — Hard Drive 61

Remove the Hard Drive

Disconnect the sensor cable from the temperature sensor on top of the hard drive.

1.

Remove the temperature sensor from the drive. Transfer the sensor to the replacement hard

2.
drive.

iMac G5 (17-inch iSight) Take Apart — Hard Drive 62

Position yourself at the top side of the unit closest to the hard drive mounting bracket.

3.

Grasp the mounting bracket as shown, and push in and down on the edge of the bracket

4.
until you feel it release. If the bracket doesn’t release, use your left hand to hold it in this

depressed position, and with your right hand use a at-blade screwdriver to pry up on the

bottom of the mounting bracket to help release it.

iMac G5 (17-inch iSight) Take Apart — Hard Drive 63

Disconnect the hard drive power and data cables.

5.

Note: If you are replacing a defective hard drive continue with the procedure to transfer the

6.

temperature sensor, mounting bracket, and mounting pins to the replacement drive.

iMac G5 (17-inch iSight) Take Apart — Hard Drive 64

Using a T8 torx screwdriver, remove two screws and the mounting bracket from the drive.

7.

Using a T8 torx screwdriver, remove two mounting pins from the other side of the drive.

8.

iMac G5 (17-inch iSight) Take Apart — Hard Drive 65

Replace the Hard Drive

Install two mounting pins in the bottom side of the hard drive mounting bracket.

1.

Install the mounting bracket to the top of the hard drive with two screws.

2.

Install the temperature senor on the hard drive. Use the double-stick tape enclosed with the

3.
replacement hard drive to attach the sensor.

Connect the hard drive power and data cables.

4.

Insert the hard drive mounting pins and position the drive on the chassis. Make sure the

5.
hard drive power and data cables are routed around the drive and beneath the hard drive
mounting bracket. Press down on the mounting bracket to lock it in place on the chassis.

Connect the sensor cable to the temperature sensor on top of the hard drive.

6.

Replace the display panel.

7.

Replace the lower EMI shield.

8.

Replace the front bezel.

9.

Replace the access door.

10.

iMac G5 (17-inch iSight) Take Apart — Hard Drive 66

DC-DC Board

Tools

Removing the optical drive requires using the following tools:

Torx T10 screwdriver (magnetized)

•

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
LCD Display

•

Part Location

iMac G5 (17-inch iSight) Take Apart — DC-DC Board

Remove the DC-DC Board

Disconnect the power supply cable and the DC power cable from the DC-DC board. 1.

iMac G5 (17-inch iSight) Take Apart — DC-DC Board

Using a T10 torx screwdriver, remove the two self-tapping screws from the bottom corners of

2.
the DC-DC board. The lower left mounting screw is beneath the power supply cable.

Using a T10 torx screwdriver, remove the machine screw from the upper right corner of the

3.
board. Lift the board straight up to remove it.

Replace the DC-DC Board

Position the DC-DC board and install the machine screw in upper right corner

1.

Install the long black self-tapping screw in the lower right corner, and the medium-length,

2.
silver self-tapping screw in the lower left corner.

Connect the DC power cable and the power supply cable to connectors on the DC-DC board.

3.

Replace the display panel.

4.

Replace the lower EMI shield.

5.

Replace the front bezel.

6.

Replace the memory access door.

7.

iMac G5 (17-inch iSight) Take Apart — DC-DC Board

Power Supply

Tools

Removing the optical drive requires using the following tools:

Torx T10 screwdriver (magnetized)

•

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
LCD Display

•
Hard drive

•

Part Location

iMac G5 (17-inch iSight) Take Apart — Power Supply

About the Power Supply

Warning: When the iMac G5 (iSight) is under power, be aware that the power supply contains
high voltages that pose a potential hazard to your personal safety. Never work on or near the
power supply with the unit powered on, and as a further precaution always make sure the unit is
unplugged when working on it with the front bezel removed.

WARNING: HIGH VOLTAGE
Text or photographs marked by this symbol indicate that a potential hazard to your personal
safety exists from a high voltage source.

The AC/DC power supply board is a high voltage source with the unit under power, and remains
powered up whenever the system is plugged in, whether or not the system is turned on. Use
extreme caution when troubleshooting the system with the front bezel removed.

Disconnect power to the system before performing maintenenace.

•

Don’t work alone. In the even of an electrical shock it is important to have another

•

individual present who can provide assistance.
Keep one hand in your pocket when working on any iMac G5 (iSight) that is plugged in.

•

This will help ensure that your body does not provide a path to ground in the event that
you accidentally make contact with the line voltage.
Don’t wear jewelry, watches, necklaces, or other metallic articles that could present a risk

•

if they accidentally make contact with the power supply circuitry.

iMac G5 (17-inch iSight) Take Apart — Power Supply

Remove the Power Supply

Using a T10 torx screwdriver, remove the three self-tapping screws from both top corners

1.
and the lower left corner of the DC-DC board. Then remove the machine screw from the
lower right corner of the board.
Replacement Note: When installing the mounting screws in the power supply, install the

machine screw rst in the lower right corner of the power supply. Then install the three self-

tapping screws.

iMac G5 (17-inch iSight) Take Apart — Power Supply

Disconnect the power supply cable.

2.

Pull out the power supply-to-TMDS cable from beneath the chassis. Disconnect the

3.
connectors.

Replace the Power Supply

Postion the power supply loosely in its mounting location.

1.

Route the power supply end of the power supply-to-TMDS cable beneath the chassis. Pull

2.
out the TMDS end of the power supply-to-TMDS cable and connect the two connectors. Tuck
the cable beneath the chassis and away from the hard drive bay.

Connect the DC power cable.

3.

Install the machine screw in the lower right corner of the power supply.Then install the three

4.
self-tapping screws.

Replace the hard drive.

5.

Replace the display panel.

6.

Replace the lower EMI shield.

7.

Replace the front bezel.

8.

Replace the memory access door.

9.

iMac G5 (17-inch iSight) Take Apart — Power Supply

Logic Board

Tools

Removing the optical drive requires using the following tools:

Torx T10 screwdriver (magnetized)

•
Torx T6 screwdriver (magnetized)

•

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
IR Board

•
LCD Display

•
Speakers

•
CPU Fan

•

Part Location

iMac G5 (17-inch iSight) Take Apart — Logic Board 74

Remove the Logic Board

Using a T10 torx screwdriver, remove the screw and ex cable mounting bracket. Disconnect

1.

the optical drive ex cable from the logic board connector

Disconnect the large, hard drive data cable from the center of the logic board.

2.

iMac G5 (17-inch iSight) Take Apart — Logic Board 75

Disconnect the following cables from connectors on the logic board. Connectors are shown

3.
starting in the lower left corner, proceeding clockwise.
Ambient light sensor
Power on
Hard drive temperature sensor (Temp 1)
Optical drive temperature sensor (Temp 2)
Hard drive fan
Optical drive fan
Camera board

iMac G5 (17-inch iSight) Take Apart — Logic Board 76

Using a T6 torx screwdriver, remove two screws and disconnect the AirPort-Bluetooth combo

4.
card. Also disconnect the AirPort and Bluetooth cables from the card.

iMac G5 (17-inch iSight) Take Apart — Logic Board 77

Remove the seven remaining logic board mounting screws. First remove the three self-

5.
tapping screws circled below, and then remove the four machine screws, shown with
double-yellow circles below.

Lift the logic board just enough to access the power supply cable connector on the

6.
underside of the logic board. Disconnect the cable and remove the logic board.

iMac G5 (17-inch iSight) Take Apart — Logic Board 78

Note: Handle the logic board carefully; support the board as shown in one of the

7.

photographs below.

iMac G5 (17-inch iSight) Take Apart — Logic Board 79

Replace the Logic Board

Replacement Note: Handle the logic board carefully; support the board as shown in one of

1.

the photographs below.

iMac G5 (17-inch iSight) Take Apart — Logic Board 80

Connect the power supply cable to the connector on the underside of the logic board.

2.

Pull all cables up and away from the logic board bay and gently place down the logic board

3.
so that all screw holes are aligned with screw mounts in the chassis.
Replacement Note: The logic board should rest on the screw mounts without any binding
or bowing—if it doesn’t, adjust any cables that are interfering with the logic board.

Before securing the logic board, connect the camera board cable to its connector on the

4.
right side of the logic board.

Secure the logic board by installing four machine screws, and then installing three self-

5.
tapping screws.

Connect the AirPort and Bluetooth cables to connectors on the combo card.

6.
Note that the cables can be connected to either connector on the combo card.

Connect the combo card and install two mounting screws.

7.

Connect seven cables to connectors on the logic board as indicated in the removal step

8.
above.

Connect the optical drive ex cable and secure it with the ex cable mounting clip and

9.
screw.

Replace the CPU fan.

10.

Replace the speakers.

11.

Replace the display panel.

12.

Replace the IR Board.

13.

Replace the lower EMI shield.

14.

Replace the front bezel.

15.

Replace the memory access door.

16.

iMac G5 (17-inch iSight) Take Apart — Logic Board 81

Optical Drive Fan

Tools

No tools are required to remove the optical drive fan.

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
IR Board

•
LCD Display

•
Speakers

•
CPU Fan

•
Logic Board

•

Part Location

iMac G5 (17-inch iSight) Take Apart — Optical Drive Fan 82

Remove the Optical Drive Fan

Lift the optical drive fan straight up and o three mounting posts.

1.

Replace the Optical Drive Fan

Make sure the hard drive power cable and camera board cable are routed beneath the

1.
optical drive fan as shown above. Align and install the optical drive fan on three mounting
posts. Push it down snug onto the posts.

Replace the logic board.

2.

Replace the CPU fan.

3.

Replace the speakers.

4.

Replace the display panel.

5.

Replace the IR Board.

6.

Replace the lower EMI shield.

7.

Replace the front bezel.

8.

Replace the memory access door.

9.

iMac G5 (17-inch iSight) Take Apart — Optical Drive Fan 83

Hard Drive Fan

Tools

No tools are required to remove the optical drive fan.

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
IR Board

•
LCD Display

•
Speakers

•
CPU Fan

•
Logic board

•

Part Location

iMac G5 (17-inch iSight) Take Apart — Hard Drive Fan 84

Remove the Hard Drive Fan

Lift the hard drive fan straight up and o three mounting posts.

1.

Replace the Hard Drive Fan

Make sure the hard drive fan cable is routed up toward the hard drive and beneath the

1.
mounting bracket of the fan. Align and install the hard drive fan on three mounting posts.
Push it down snug onto the posts.

Replace the logic board.

2.

Replace the CPU fan.

3.

Replace the speakers.

4.

Replace the display panel.

5.

Replace the IR Board.

6.

Replace the lower EMI shield.

7.

Replace the front bezel.

8.

Replace the memory access door.

9.

iMac G5 (17-inch iSight) Take Apart — Hard Drive Fan 85

AC Power Inlet

Tools

Removing the AC power inlet requires using the following tools:

Torx T10 screwdriver (magnetized)

•

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
IR Board

•
LCD Display

•
Speakers

•
CPU Fan

•
Logic board

•
Hard drive fan

•

Part Location

iMac G5 (17-inch iSight) Take Apart — AC Power Inlet 86

Remove the AC Power Inlet

Using a torx T10 screwdriver, remove the three self-tapping screws from the power inlet.

1.

Using a tox T10 screwdriver, remove the machine screw from the power inlet ground cable.

2.

iMac G5 (17-inch iSight) Take Apart — AC Power Inlet 87

Disconnect the power inlet-to-power supply cables and unlace the power inlet cable from

3.
beneath the chassis.

Peel up the EMI tape that secures the AC power inlet to the rear housing and remove the

4.
power inlet.

iMac G5 (17-inch iSight) Take Apart — AC Power Inlet 88

Replace the AC Power Inlet

Install the AC power inlet on the rear housing screw mounts with three self tapping screws.

1.

Install the power inlet ground cable to the chassis with a machine screw.

2.

Route the power inlet cable beneath the chassis as shown in the photo above, and connect

3.
it to the power supply.

Using EMI tape, securely tape the top and bottom edges of the AC power inlet to the rear

4.
housing.

Replace the hard drive fan.

5.

Replace the logic board.

6.

Replace the CPU fan.

7.

Replace the speakers.

8.

Replace the display panel.

9.

Replace the IR Board.

10.

Replace the lower EMI shield.

11.

Replace the front bezel.

12.

Replace the memory access door.

13.

iMac G5 (17-inch iSight) Take Apart — AC Power Inlet 89

Ambient Light Sensor Board

Tools

No tools are required to remove the ambient light sensor board.

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
IR Board

•
LCD Display

•
Speakers

•
CPU Fan

•
Logic board

•

Part Location

iMac G5 (17-inch iSight) Take Apart — ALS Board 90

Remove the Ambient Light Sensor Board

Remove the rubber bumper from between the chassis and the ALS board.

1.

Peel the ALS o the inside bottom of the rear housing.

2.

Replace the Ambient Light Sensor Board

Press the sticky side of the ALS board to the bottom inside edge of the rear housing.

1.

Install the rubber bumper between the back of the ALS board and the chassis.

2.

Replace the logic board.

3.

Replace the CPU fan.

4.

Replace the speakers.

5.

Replace the display panel.

6.

Replace the IR Board.

7.

Replace the lower EMI shield.

8.

Replace the front bezel.

9.

Replace the memory access door.

10.

iMac G5 (17-inch iSight) Take Apart — ALS Board 91

iMac G5 (17-inch iSight) Take Apart — ALS Board 92

iMac G5 (17-inch iSight) Take Apart — ALS Board 93

Clutch

Tools

Removing the clutch requires using the following tools:

Torx T10 screwdriver (magnetized)

•

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
IR Board

•
LCD Display

•
Speakers

•
CPU fan

•
Logic board

•
Optical drive fan

•
Hard drive fan

•
Hard drive

•

iMac G5 (17-inch iSight) Take Apart — Clutch 94

Part Location

iMac G5 (17-inch iSight) Take Apart — Clutch 95

Remove the Clutch

Carefully peel back the EMI tape and pull the cover straight o the clutch.

1.

Using a T10 torx screwdriver, remove the four clutch mounting screws.

2.

iMac G5 (17-inch iSight) Take Apart — Clutch 96

Stand up the unit, and peel up the silk tape to access the four clutch-to-stand mounting

3.
screws. .

Using a T10 torx screwdriver, remove the four clutch-to-stand screws. Remove the clutch and

4.
cover from the stand.

5.

iMac G5 (17-inch iSight) Take Apart — Clutch 97

Replace the Clutch

Make sure the stand is erect and the end of the stand is inserted through the mounting hole

1.
in the rear housing.

Position the clutch on the stand as shown, with the springs at bottom right. Install the four

2.
long, clutch-to-stand mounting screws..

Adjust the clutch so that its chassis mounting holes align, and install the four machine

3.
screws that secure the clutch to the chassis.

Replace the hard drive.

4.

Replace the hard drive fan.

5.

Replace the optical drive fan.

6.

Replace the logic board.

7.

Replace the CPU fan.

8.

Replace the speakers.

9.

Replace the display panel.

10.

Replace the IR Board.

11.

Replace the lower EMI shield.

12.

Replace the front bezel.

13.

Replace the memory access door.

14.

iMac G5 (17-inch iSight) Take Apart — Clutch 98

Wireless Antenna

Tools

Removing the wireless antenna requires using the following tools:

Flat-blade screwdriver

•

Black stick (or other nonconductive nylon or plastic at-blade tool)

•

Preliminary Steps

Before you begin, follow steps for removing the following:

Access door

•
Front bezel

•
Lower EMI shield

•
IR Board

•
LCD Display

•
Speakers

•
CPU fan

•
Logic board

•
Optical drive fan

•
Optical drive

•

iMac G5 (17-inch iSight) Take Apart — Wireless Antenna 99

Part Location

Remove the Wireless Antenna

Carefully peel back the EMI skirt and backing from the top right inside corner of the rear

1.
housing as shown below. Peel back just enough EMI backing to access the antenna cable.

iMac G5 (17-inch iSight) Take Apart — Wireless Antenna 100