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 Modication 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 reect 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 certied 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 Modication
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 Modication in the General Information chapter if the
bezel is dicult 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
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