imac 24 mid2007
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Service Source
iMac (24-inch Mid 2007)
Updated 16 December 2008
© 2007 Apple Inc. All rights reserved.
Apple Inc.
© 2007 Apple Inc. All rights reserved.
Under the copyright laws, this document may not be copied, in whole or in part, without the
written consent of Apple.
Every eort has been made to ensure that the information in this document is accurate. Apple is
not responsible for printing or clerical errors.
Apple
1 Innite Loop
Cupertino, CA 95014-2084
USA
+ 1 408 996 1010
www.apple.com
Apple, the Apple logo, Mac, and Macintosh are trademarks of Apple Inc., registered in the U.S. and
other countries.
ii
iMac (24-inch Mid 2007)
Contents
Manual Updates 7
16 December 2008 7
21 March 2008 7
19 December 2007 7
10 December 2007 8
7 November 2007 8
Take Apart
General Information 10
Product View 10
Opening the Computer 10
Note About Images in This Manual 10
Serial Number Location 11
General Tools 12
Required Special Tools 12
View of the Main Modules 14
View of the Rear Housing and Cables 14
Back View 15
I/O Ports 16
Cleaning and Handling the Glass Panel 17
Do’s and Don’ts 18
Handling a Broken Glass Panel 18
Safety 19
EMI Shielding 20
Access Door 21
Memory 23
Glass Panel 26
Cleaning and Handling of the Glass Panel 27
Removing the Glass Panel 30
Replacing the Glass Panel 33
Installing a Replacement Glass Panel 38
Front Bezel 43
Camera Board 49
iii
Battery 52
IR (Infrared) Board 55
AirPort Extreme Card 58
Bluetooth Card 62
LCD Temp Sensor and Cable 65
Speaker, Left 71
LCD Display Panel 76
Ambient Temperature Sensor Cable 83
Ambient Temperature Sensor 87
LVDS Cable 91
Inverter Cable 96
Speaker, Right 101
Optical Drive Fan 104
CPU Fan 107
Power Supply, AC/DC 110
Hard Drive 117
Hard Drive Sensor Cable 124
Optical Drive 127
Optical Flex Cable 133
Optical Sensor Cable 135
Logic Board 139
Video Card 148
Hard Drive Fan 153
Audio Board 156
Hard Drive Data Cable 159
Clutch Cover 162
Stand 165
iv
Chassis 170
Clutch Mechanism 175
AC Power Inlet 180
Camera Cable 186
Microphone Cable 191
DC Power Cable 197
Rear Cover 202
Troubleshooting
General Information 206
Serial Number 206
Power On Self Test (POST) 207
DDR Memory 208
Diagnostic LEDs 209
Symptom Charts 211
How to Use the Symptom Charts 211
Power Issues 212
Video 213
System Shuts Down 215
Glass Panel 216
Display Panel 217
Hard Drive 218
Optical Drive 220
Fan Sound 225
AirPort 230
Bluetooth 231
IR Remote 232
IR Sensor/Receiver 233
Built-in iSight Camera 234
Speakers 236
Mouse 237
Keyboard 238
Error Beep(s) 240
USB 241
Views
iMac (24-inch, Mid 2007)—Upper Exploded View 244
iMac (24-inch 2007)—Lower Exploded View 245
Screw Chart 246
v
vi
Manual Updates
16 December 2008
Take Apart
Power Supply-->Replacing the Power Supply--> Added a “Replacement Note” indicating that •
the 240W (661-4422) and 250W (661-4478) power supplies are interchangeable.
21 March 2008
The following chapters have been updated:
Troubleshooting-->Glass Panel-->A new procedure has been added describing how to •
troubleshoot a system that has contamination on the inside surface of the glass panel.
19 December 2007
The following chapters have been updated:
Take Apart
Logic Board-->Removing the Logic Board-->Step 5-->Added a “Note” indicating which •
service parts should be transferred to the replacement logic board prior to removing the
bad logic board.
Troubleshooting--> No Video, Boot Chime Heard-->Step 6 was updated and Step 7 which •
made reference to a front LED was removed. The iMac Mid 2007 models do not have an LED
on the front bezel.
iMac (24-inch Mid 2007) Take Apart — Manual Updates 7
10 December 2007
The following chapters have been updated:
Take Apart
The AC Power Inlet take apart procedure was removed from the service manual. The AC •
Power inlet is not available as a service part. It is part of the rear housing assembly. Order the
rear housing if you require a new AC Power Inlet.
Troubleshooting
Symptom Charts-->Video• -->Added the iMac Graphics Firmware Update 1.0. to the existing
sections mentioning “Make sure all software updates have been applied to the computer.”
Whenever the video card on an iMac (24-inch Mid 2007) or iMac (20-inch Mid 2007)
computer is replaced, ensure that the iMac Graphics Firmware Update 1.0 has been installed
before returning the computer to the customer.
7 November 2007
The Take Apart and Troubleshooting chapters in the iMac (20-inch Mid 2007) and iMac (24-inch
Mid 2007) Service Manuals have been updated in the following manner:
Take Apart
DC Power Supply-->Replacing the AC/DC Power Supply-->Step 1: Added “Note: There are two •
types of power supplies and each requires a specic pressure wall. Each power supply comes
with the correct pressure wall.”
Hard Drive• -->Replacing the Hard Drive-->Step 2: Added “Orient the hard drive with the
circuit board side of the drive facing up.”
Right Speaker-->Removing the Right Speaker: Graphic of screw location corrected.
Troubleshooting
Symptom Charts-->Display-->Added symptom “Black and white splotches on the LCD panel •
after it runs for awhile.”
Symptom Charts-->Video, No Power, Display, System Shuts Down-->Added step to all the •
sections noted mentioning: “Make sure all software updates have been applied to the
computer. Refer to KBase article 303903, “Intel-based iMac: Installing available updates” or
to the Apple Downloads “iMac Software Update 1.2 ( Tiger)” or “iMac Software Update 1.3
(Leopard).”
Symptom Charts-->Speakers: Can’t hear sound from the speakers-->Step 4-->Verify that the •
speaker cable connector is securely attached to the “logic board” not the “audio board.”
iMac (24-inch Mid 2007) Take Apart — Manual Updates 8
Service Source
Take Apart
iMac (24-inch Mid 2007)
© 2007 Apple Inc. All rights reserved.
Product View
General Information
Opening the Computer
Important: • The glass panel on the iMac should only be removed by Apple authorized
technicians. Removing the glass panel requires special tools and they must be used to
replace any module other than the SO-DIMMs.
Read and follow all of the handling and cleaning recommendations to prevent damaging •
the glass and LCD panel.
Follow ESD precautions when the front bezel and the LCD display are removed.•
Note About Images in This Manual
Small dierences in appearance between the images pictured and the actual computer you are
servicing may exist, however the steps and sequence are the same unless otherwise noted.
iMac (24-inch Mid 2007) Take Apart — General Information 10
Serial Number Location
On the bottom of your iMac stand, you’ll nd a label with the serial number printed on it.
To conrm the conguration from the Apple menu, choose About This Mac. The Processor listing
will show the speed of the processor followed by the processor type.
The iMac (24-inch, 2007) has several features that distinguish it from earlier iMac models:
2.4 GHz Intel Core 2 Duo processor or 2.8 GHz Core 2 Extreme•
ATI Radeon HD 2600 Pro with 256 MB GDRR3 VRAM•
24-inch widescreen at panel display (1920x1200 native resolution)•
320 GB hard disk (for the 2.0 GHz) or: 500 GB (for the 2.8 GHz) with CTO options of 500 •
GB, 750 GB or 1TB.
1 GB (1x 1GB) 667 MHz with support up to 4.0 GB system memory•
Built-in stereo speakers with internal 24-watt digital amplier•
New Apple keyboard, wired (CTO option: new Apple Wireless Keyboard) •
iMac (24-inch Mid 2007) Take Apart — General Information 11
General Tools
The following tools are required to service the computer:
ESD-safe workstation and mat•
Soft, clean towel or cloth (to protect the display and removed parts from scratches)•
Black stick (or other non-conductive nylon or plastic at-blade tool)•
Phillips #2 screwdriver•
Torx T6 screwdriver (magnetized)•
Torx T8 screwdriver (magnetized)•
Torx T10 screwdriver (magnetized)•
Flat-blade screwdriver•
Isopropyl alcohol•
ESD bags•
Required Special Tools
Special tools are required to remove, handle, and clean the glass panel such as the following.
These are available as a starter kit too. View the tools in the Glass Panel take apart chapter.
922-8252 Suction cups, Pkg. of 2 1.
922-8261 Sticky silicone roller (6-inch) to clean the glass panel 2.
922-8262 Sticky sheet pads to clean the silicone roller 3.
922-8263 Polishing cloths, clean, anti-static, optical grade micro ber “terry” style cloth4.
922-8253 Gloves, lint-free, anti-static, Pkg. of 2 5.
922-8259 Microfoam bag to store the glass panel, Pkg. of 56.
922-8258 ESD bags, 24x20, Pkg. of 5, to store the LCD panel. 7. Note: To prevent the buildup
of static charges which may attract dust particles to the surface of the display, store the LCD
panel in an anti-static bag whenever it has been removed from the system.
iKlear Apple Polish or Brillianize anti-static spray cleaning solution. A list of where iKlear/8.
Brillianize can be obtained is listed in the Glass Panel chapter of the service manuals. Note:
IPA (isopropyl alcohol) can be used to clean the glass if you are unable to source iKlear or
Brillianize.
iMac (24-inch Mid 2007) Take Apart — General Information 12
Cleaning Tools Starter Kit
The following tools are oered in the starter kit (076-1277).
Suction cups, one pair•
Sticky silicone roller (6-inch) to clean the glass panel •
Sticky sheets to clean the silicone roller, 2 pads•
Polishing cloths, clean, anti-static, microber “terry” style cloth (5 cloths)•
Gloves, lint-free, anti-static, two pairs •
Microfoam bag to store the glass panel (5 bags)•
ESD bag for LCD display storage, (5 bags)•
Removing the Glass Panel
Rubber suction cups (922-8252) and anti-static gloves (922-8253) are required to remove the
glass panel. Lift the glass straight up and o the bezel.
iMac (24-inch Mid 2007) Take Apart — General Information 13
View of the Main Modules
View of the Rear Housing and Cables
Inside the rear housing you can see the chassis, AC inlet lter, the mechanism, the hard drive fan,
the AC/DC/power cable, the microphone cable, the camera cable, and the antennas.
iMac (24-inch Mid 2007) Take Apart — General Information 14
Back View
The input/output ports are located on the bottom left side on the back of the computer. The
power on button is located on the bottom right side on the back of the computer.
iMac (24-inch Mid 2007) Take Apart — General Information 15
I/O Ports
The input/output ports from left to right are:
Headphone out/optical digital audio out port•
Audio in/optical digital audio in port•
USB 2.0 ports (3)•
FireWire 400 port•
Firewire 800 port•
Ethernet (10/100/1000 Base-T) port•
Mini-DVI port•
iMac (24-inch Mid 2007) Take Apart — General Information 16
Cleaning and Handling the Glass Panel
The iMac (24-inch Mid 2007) model has a glass panel that attaches to the outside of the front •
bezel.
The glass panel is not tempered and will break into sharp pieces if mishandled. A scratched •
or broken glass panel is not covered under warranty.
Removing the glass panel requires special tools such as lint-free gloves, rubber suction cups, •
microfoam storage bags, and the iKlear cleaning solution.
The glass panel must be removed prior to replacing any module other than the SO-•
DIMM’s.
To prevent contamination, handle the glass panel only by the edges while wearing lint-free •
gloves.
The complete list of tools and resources can be found in the Glass Panel take apart chapter.
iMac (24-inch Mid 2007) Take Apart — General Information 17
Do’s and Don’ts
DO
Handle glass panel using lint free gloves.•
Use only a sticky silicone roller to clean the inside surface of the glass and the LCD panel.•
Use iKlear to clean • ONLY the outside surface of the glass panel.
Place the glass panel into a clean protective microfoam bag when it is not installed on an •
iMac.
Store the glass panel in a safe area where it will not be broken or damaged.•
Store the LCD panel in an anti-static bag to prevent the buildup of static charges which may •
attract dust particles to the display’s surface.
Store the silicone roller and sticky paper within a temperature range of 39-104 degrees F •
(5-40C).
Wash the silicone roller in warm soapy water or wipe with isopropyl alcohol if the roller is no •
longer tacky. Replace the silicone roller if the tackiness does not return.
DO NOT
Touch the inside of the glass with bare hands or dirty gloves. Fingerprints will be dicult to •
remove.
Clean the inside surface of the glass or the LCD with iKlear or other cleaning solutions.•
Place the glass panel onto a work surface where it may collect dust and other contaminants •
unless it has rst been placed into its protective microfoam bag.
Use single wipe iKlear packets or other cleaning solutions to clean the glass.•
Handling a Broken Glass Panel
The glass panel is not tempered and will break into sharp pieces if mishandled.
If the glass is broken it must be carefully removed from the iMac to prevent irreparable damage
to the front surface of the LCD. If the front surface of the LCD is scratched by the broken glass the
LCD may need to be replaced.
Do not handle broken glass unless you are wearing protective cut-resistant gloves. The lint-free
gloves used to prevent contamination of the glass panel are not suitable for handling broken
glass.
Use a broom and dust pan to sweep up as much of the broken glass as possible. Glass fragments
may have travelled several feet from the location of the glass panel so be sure to thoroughly
clean the entire area. Use a vacuum to remove the smaller fragments not picked up by the
broom
iMac (24-inch Mid 2007) Take Apart — General Information 18
Safety
WARNING: HIGH VOLTAGE: The highlighted module below is an AC/DC power supply that
poses a shock hazard. When the computer 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. A white, shock- hazard
warning symbol is silk-screened in the middle of the power supply module.
WARNING:
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 maintenan• ce.
Disconnect ESD wrist straps when working on a plugged in system. •
Don’t work alone. In the event• 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 • computer 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 (24-inch Mid 2007) Take Apart — General Information 19
EMI Shielding
The rear cover of the computer 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 that can be ordered from Apple service.
iMac (24-inch Mid 2007) Take Apart — General Information 20
Access Door
Tools
Phillips #2 screwdriver•
ESD-safe workstation and mat•
Soft , clean towel or cloth•
Preliminary Steps
Before you begin, place the computer face down on a clean, soft, lint-free cloth so that the
bottom is facing you.
Part Location
iMac (24-inch Mid 2007) Take Apart — Access Door 21
Removing the Access Door
Disconnect all cables and the power cord from your iMac.1.
Place a soft, clean towel or cloth on your work surface. Hold the side of the iMac and lay it 2.
down so that the screen is against the surface and the bottom is facing you.
Raise the stand and use a Phillips #2 screwdriver to loosen the captive screw on the memory 3.
access door by turning it counterclockwise.
Important: When removing and installing the RAM access door it is important that you use
the correct size Phillips screwdriver. Using one that is too small or too big may damage the
screw head, and/or screwdriver. Before trying to remove the RAM access door screw, make
sure that the screwdriver tip is in good shape without rounded edges and that it rmly seats
into the screw head. If the screwdriver doesn’t seat well then do not use it.
If the RAM access door screw head has been severely damaged and cannot be removed with
a Phillips #2 screwdriver you may be able to use a small jewelers at blade screwdriver to
engage the screw head and carefully remove it. In some cases it may be necessary to use a
screw extractor tool. When using a screw extractor make sure that no metal shavings from
the damaged screw drop inside the system. For more information on screw extractors and
how to use them type ‘screw extractor’ into your favorite internet search engine.
Remove the access door.4.
Replacing the Access Door
Position the computer face down on a clean, soft, lint-free cloth so that the bottom is facing 1.
you.
Position the access door on the rear housing over the memory compartment. 2.
Use a Phillips #2 screwdriver to tighten the captive screw.3.
Important4. : To ensure proper cooling the iMac should not be operated without the memory
access door installed.
iMac (24-inch Mid 2007) Take Apart — Access Door 22
Memory
This computer comes with a minimum of 1GB of 667 MHz PC2-5300 Double Data Rate 2 (DDR2)
Small Outline Dual Inline Memory Modules (SO-DIMMs). It has two slots that can accept DIMMs. A
1 GB, or 2 GB memory module may be installed for a maximum of 4 GB of memory.
Tools
ESD mat •
Soft , clean towel or cloth•
Preliminary Steps
Before you begin, remove the access door
.
Warning: Always shut down the computer and remove the power cord before installing memory.
Do not attempt to install memory in the computer while it is plugged in.
Part Location
iMac (24-inch Mid 2007) Take Apart — Memory 23
Removing the Memory
Shut down the computer, and disconnect all cables including the power cord.1.
Holding the sides of the computer, lay it face down on a soft, clean cloth so the stand is 2.
facing you.
After removing the access door, touch the metal stand or bezel to discharge any static 3.
electricity from your body.
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.
Untuck the tab in the memory compartment. If you are replacing a memory module, untuck 4.
the tab and pull it to eject the installed memory module.
Set the memory module(s) aside.5.
iMac (24-inch Mid 2007) Take Apart — Memory 24
Replacing the Memory
With the computer face down, orient the notch on the DIMM with the notch in the memory 1.
slot. In this case, the notch is on the left.
With your ngers, press the DIMM fully into the slot until you hear a click. Repeat for the 2.
other DIMM slot.
Fold the black tab over each DIMM. 3.
Replace the memory access door.4.
Use a Phillips #2 screwdriver to tighten the captive screw on the memory access door.5.
Make sure the computer recognizes the new memory by opening System Proler, clicking 6.
More Info, and clicking Memory.
iMac (24-inch Mid 2007) Take Apart — Memory 25
Glass Panel
Tools
This procedure requires the following tools, which are oered individually or as part of the
starter kit, 076-1277.
Suction cups (922-8252)•
Sticky silicone roller (6-inch) to clean the glass panel (922-8261)•
Sticky sheets to clean the silicone roller (922-8262)•
Polishing cloths, clean, anti-static, optical grade micro ber “terry” style cloth (922-8263)•
iKlear Apple Polish or Brillianize anti-static spray cleaning solution for the outside of the glass •
Isopropyl alcohol (IPA) to clean the inside of the glass •
Gloves, lint-free, anti-static (922-8253)•
Microfoam bag to store the glass panel (922-8259) •
ESD bag for LCD display storage (922-8258)•
Note: Tools without part numbers can be sourced directly from the vendor. Refer to “Cleaning
Tool Resources” at the end of this chapter.
Part Location
iMac (24-inch Mid 2007) Take Apart — Glass Panel 26
Cleaning and Handling of the Glass Panel
The iMac (24-inch Mid 2007) model has a glass panel that attaches to the outside of the front
bezel. The glass panel is not tempered and will break into sharp pieces if mishandled. A scratched
or broken glass panel is not covered under warranty. Removing the glass panel requires special
tools such as lint-free gloves, rubber suction cups, microfoam storage bags, and the iKlear
cleaning solution. The glass panel must be removed prior to replacing any module other
than the SO-DIMM’s. To prevent contamination, the glass panel must only be handled by the
edges while wearing lint-free gloves.
Isopropyl Alcohol (IPA)
Cleaning the Glass
In the unfortunate event that gloves are not worn, and ngerprints and oil smudges are visible
on the inside of the glass, cleaning should be done using a lint free cloth and IPA. Spray a small
amount of IPA onto a CLEAN lint free cloth to avoid introducing any other contaminants. Gently
wipe the area and allow the glass to dry. Note: The silicone rollers are only eective in removing
dust and other particles. If ngerprints or oil smudges are not removed prior to using the roller,
the silicone roller will transfer the ngerprints and oil smudges onto the glass.
Cleaning the Silicone Roller
Clean the silicone roller by wiping it down with IPA (Isopropyl Alcohol) or washing it with warm
soapy water.
iMac (24-inch Mid 2007) Take Apart — Glass Panel 27
DO
Handle glass panel using lint free gloves.•
Use only a sticky silicone roller to clean the inside surface of the glass and the LCD panel.•
Use iKlear to clean • ONLY the outside surface of the glass panel.
Use Isopropyl alcohol to clean • ONLY the inside surface of the glass.
Place the glass panel into a clean protective microfoam bag when it is not installed on an •
iMac.
Store the glass panel in a safe area where it will not be broken or damaged.•
Store the LCD panel in an anti-static bag to prevent the buildup of static charges which may •
attract dust particles to the display’s surface.
Store the silicone roller and sticky paper within a temperature range of 39-104 degrees F •
(5-40C).
Wash the silicone roller in warm soapy water or clean it by wiping it down with isopropyl •
alcohol if the roller is no longer tacky. Replace the silicone roller if the tackiness does not
return.
DO NOT
Touch the inside of the glass with bare hands or dirty gloves. Fingerprints will be very •
dicult to remove.
Clean the inside surface of the glass or the LCD with iKlear or other cleaning solutions.•
Place the glass panel onto a work surface where it may collect dust and other contaminants •
unless it has rst been placed into its protective microfoam bag.
Use single wipe iKlear packets or other cleaning solutions to clean the glass.•
Metal Alignment Pins on the Glass Panel
There are four alignment pins at the top of the glass panel near the camera, one pin at the
bottom near the IR remote sensor, and a pin on the left and right side of the glass. Important:
If the glass is removed from the bezel at an angle, the metal alignment pins may bend, causing
scratches on the inside of the glass and possibly requiring replacement of the glass panel.
iMac (24-inch Mid 2007) Take Apart — Glass Panel 28
Magnets on the Front Bezel
The glass panel has a thin silver ferrous metal band axed to the perimeter which is magnetically
attracted to the fourteen magnets (circled below) which are attached to the front bezel. These
magnets hold the glass panel in place. Suction cups are used to pull the glass panel away from
the magnets on the front bezel. .
iMac (24-inch Mid 2007) Take Apart — Glass Panel 29
Removing the Glass Panel
Apple 1. strongly recommends wearing clean lint-free gloves whenever handling the glass
panel. The gloves protect the glass panel from body oils, dirt, and other contaminants. Put on
a pair of clean gloves with the rubberized-side of the gloves on the palm side of your hand.
Position the computer on the rear cover, on a soft protective lint-free surface, with the stand 2.
facing you
Clean o the suction cups, making sure they are free of contaminants. It may be necessary to 3.
wash the suction cups with a mild liquid soap in order to remove the residual release agents
applied during manufacturing.
iMac (24-inch Mid 2007) Take Apart — Glass Panel 30
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