Apple iMac (Flat Panel Specifications

Service Source iMac (Flat Panel) Updated 22 March 2005 © 2002 Apple Computer, Inc. All rights reserved.

Memory, SO-DIMM (user-installable) Tools No tools are required for this procedure. Part Location Note: The user-installable memory slot is identified a

9. Attach the cable retainer and screws. 10. Before proceeding, make sure the cables are routed and connected as show below. Base Reassembly iMac (F

11. Insert the power supply insulators if you removed them. 98 iMac (Flat Panel) Take Apart Base Reassembly

12. Replace the fan, the fans screws, and connect the fan cable. 13. Replace the optical drive door assembly. 14. Replace the door springs. Base Re

15. Rotate the base so the optical door is on the right. Replace the power supply and the six screws. Remember, the two smaller screw locations are h

17. Replace the optical/drive carrier assembly, EMI shield, and screws. 18. Replace the I/O port covers. Base Reassembly iMac (Flat Panel) Take Apa

19. Replace the battery and memory on the logic board. 20. Replace the blank white “plug” into the AC line filter hole in the bottom housing before r

23. Replace the modem filter board into the opening in the bottom housing. Replace the modem and modem filter board screws. Connect the cable to the mo

25. . Connect the following to the bottom housing: A Power supply connector B Hard drive/optical drive data cable C AC line filter connector D AirPor

26. Apply thermal paste before closing the bottom housing. Squeeze a thin film of thermal paste onto the thermal pipe and mating surface. Spread the p

27. Replace the AirPort card (shown below). 28. Replace the memory (SO-DIMM, if present). 29. Close the bottom housing and replace the four torx sc

Procedure 1. Unplug all cables from the computer except the power cord. 2. Important: To avoid electrostatic discharge, always ground yourself by to

30. Replace the user access door. Base Reassembly iMac (Flat Panel) Take Apart - 107

Service Source Troubleshooting iMac (Flat Panel) © 2002 Apple Computer, Inc. All rights reserved.

General Information What’s New and Different (2003): 1. The iMac (Flat Panel) with serial number xx305xxxxxx or later (released in February 2003) wil

6. The display is a TFT LCD panel with a maximum resolution of 1024 x 768. The display is connected to the unit via a tilt and swivel neck extension.

Block Diagram The following illustration provides a simplified block diagram of the main logic board. The diagram shows the ICs and the buses that con

Logic Board, Top Note: Enlarge the page to view the graphic at a larger size. 4 - iMac (Flat Panel) Troubleshooting General Information

Logic Board, Bottom Note: Enlarge the page to view the graphic at a larger size. General Information iMac (Flat Panel) Troubleshooting - 5

I/O Ports Service Cables Three extension cables (076-0897) are required when troubleshooting the iMac with the bottom housing open, as shown below. Im

The PMU Chip The PMU (Power Management Unit) is a microcontroller chip that controls all power functions for the computer. The PMU (location shown bel

4 Resetting the PMU on the Logic Board Resetting the PMU (Power Management Unit) on the logic board can resolve many system problems. Whenever you hav

6. Remove the memory from the slot. Memory, SO-DIMM (user-installable) iMac (Flat Panel) Take Apart - 9

Power-On Self Test There is a power-on self test that resides in the ROM of the iMac. This test automatically runs whenever the iMac is powered on aft

Logic Board Battery Important: Apple highly recommends removing the battery when handling the logic board. Make sure to use proper ESD protection when

Thermal Paste Application The following instructions explain how to apply thermal paste to the thermal pipe in the iMac (Flat Panel) computer. Failure

2 Squeeze a drop of thermal paste onto the middle of the thermal pipe surface as shown below. Note: In testing, the drop of thermal paste shown below

Thermal Pad Replacement Instructions The following instructions explain how to replace the thermal pads in the iMac (Flat Panel) computer. These pads

Symptom Charts How to Use the Symptom Charts The Symptom Charts included in this chapter will help you diagnose specific symptoms related to the produc

No Power The computer will not power on. 1. Verify the power outlet is good. Plug a different device into the socket to ensure there is power, or plu

11. Check power supply output. Disconnect the diagnostic power cable from the power supply connector, and measure power at the power supply connector

No Video The screen is dark, fan and hard drive are spinning. 1. Reset parameter RAM. Press Command-Option-P-R during startup before “Welcome to Maci

8. Replace the inverter board. 9. Replace the LCD display. 10. Replace the neck assembly 11. Replace the logic board. 12. Replace the power suppl

Bottom Housing Tools This procedure requires the following tools: • Torx-15 screwdriver Part Location Preliminary Steps Before you begin, do the foll

Display When displaying a single color over the screen area, the LCD panel shows one or more pixels that are not properly lit Active-matrix LCD techno

Screen tilts to the left or the right even after a manual adjustment. Note: It is normal for the screen on an iMac (Flat Panel) to have a small amoun

Hard Drive Hard Drive won’t mount to the desktop 1. Disconnect any connected peripherals. 2. Boot from the system CD that came with the computer and

Optical Drive CD or DVD won’t mount to the desktop 1. Try cleaning the disc. If it is dirty or scratched, it may not mount. 2. Try a different disc.

Sound Out No sound from either internal or external speakers 1. Verify volume setting is correct in system preferences. 2. Replace the external spea

Sound In No sound is recorded 1. Check setup of the system preferences for the microphone. 2. Check the microphone cable connection. 3. Replace the

Error Beep(s) Computer beeps at startup. 1. RAM expansion DIMMs for the iMac must be PC133 compliant and use SDRAM devices. If the user installs a DI

Modem No modem dial tone 1. Verify known-good analog (not digital) telephone line. 2. Verify known-good RJ-11 telephone cable. 3. Verify RJ-11 cabl

I/O Ports Difficulty Plugging in an Ethernet Cable Note: The Ethernet port on an iMac (Flat Panel) has a special mechanism to prevent modem cables fro

USB Printing Problems iMac cannot print to attached known-good printer. 1. Verify that the printer is Macintosh compatible. 2. Verify that you have

Procedure 1. Remove the four torx screws. Replacement Note: These torx screws must be tightened to at least 17 in.-lbs. If you do not have a torque d

USB Printing Problems Symptom Charts iMac (Flat Panel) Troubleshooting - 29

Service Source Upgrades iMac (Flat Panel) © 2002 Apple Computer, Inc. All rights reserved.

Memory, SO-DIMM Tools • Phillips #0 screwdriver. Part Location The iMac has two RAM expansion slots. The factory-installed RAM slot accepts a standar

Procedure Opening the Computer Warning: The computer must be turned off before RAM modules are removed or inserted. To remind you, a red LED is visibl

4. Loosen the four captive screws at the base of the computer and gently remove the access panel. Memory, SO-DIMM iMac (Flat Panel) Upgrades - 3

Important: To avoid electrostatic discharge, always ground yourself by touching metal before you touch any parts or install any components inside the

Installing the Memory Module Note: If you are replacing a defective memory module, rather than adding a module, remove the defective module before pro

3. Gently insert the memory module into the slot. You will hear a click when the memory is completely inserted into the slot. Note: Make certain to p

Closing the Computer 1. Replace the access panel and the four screws. 2. Reconnect all cables and restart the computer. Warning: Never turn on the c

AirPort Card Tools • Phillips #0 screwdriver to remove the user access panel. Part Location Note: Written and video instructions covering customer-i

2. Rotate the base so the optical drive door is on the right. Gently open the bottom housing in the direction of the arrow. Note: Cables are still at

Opening the Computer Warning: Always shut down your computer before opening it to avoid damaging its internal components or causing injury. Shut down

3. Loosen the four captive screws at the base of the computer and gently remove the access panel. 10 - iMac (Flat Panel) Upgrades AirPort Card

Important: To avoid electrostatic discharge, always ground yourself by touching metal before you touch any parts or install any components inside the

2. Insert the card into the AirPort Card slot. Closing the Computer 1. Replace the access panel and tighten the four captive screws. 2. Reconnect a

AirPort Card iMac (Flat Panel) Upgrades - 13

Service Source Exploded View iMac (Flat Panel) © 2002 Apple Computer, Inc. All rights reserved.

iMac (Flat Panel) Exploded View - 1 Base Unit Top Housing, Base 922-4676Part of the Faraday cage (922-4689)Fan Gasket 922-4762Fan Bracket 922-5092

661-2586Display and Neck 922-4681 922-4761 922-4704 661-2582 922-4717 661-2585 Cover, LCD Display (W/Logo) Antenna Shield, LCD Display LCD Display 15&

Screw Matrix iMac (Flat Panel)Screw Matrix Bottom Housing Bolts Grounding Screw to Faraday Speaker (2) In Centimeters (4) (1) Power Supply (4) T-15

iMac (Flat Panel) Screw Locator - 1 of 7 Bottom Housing Bolts (4) T-15, 922-5104 Grounding Screw to Faraday (1) T-15, 922-4714 Drive Carrier to Farada

3. Disconnect the following: A Power supply connector B Hard drive/optical drive data cable C AC line filter connector D AirPort antenna connector E

iMac (Flat Panel) Screw Locator - 2 of 7Speaker (2)T-10, 922-4709Hard Drive to Carrier to Assy (4)T-10, 922-5105Optical Drive to Carrier Assy (4)T-10,

iMac (Flat Panel) Screw Locator - 3 of 7Metal DVD Shield (2)T-10, 922-4707Fan (2)T-15, 922-4710Fan Bracket (2)T-20, 922-4708Door Hinge (2)T-10, 922-51

iMac (Flat Panel) Screw Locator - 4 of 7Blind Mate Connector (2)T-10, 922-5109Faraday to Outer Shell (2)T-10, 922-5106Faraday Under Logo (1)T-8, 922-4

iMac (Flat Panel) Screw Locator - 5 of 7White, Plastic NeckCable Retainer (4)T-10, 922-5112LCD Bezel (10)1.5 mm Hex, 922-4716Antenna to LCD Bezel (2)1

iMac (Flat Panel) Screw Locator - 6 of 7Inverter (3)T-8, 922-4723Metal Neck Biscut (3)T-8, 922-4723Nut, Antenna5 mm, 922-4724Logic Board,Metal (3)Plas

iMac (Flat Panel) Screw Locator - 7 of 7RJ-11 Board (2)T-6, 922-5115Modem (2)T-8, 922-5116AC Line Filter (2)T-10, 922-5117Antenna Extension (2)T-10

Thermal Paste Application Tools This procedure requires the following tools: • Plastic stylus or plastic spatula to remove the old thermal paste • P

Procedure 1. Thoroughly clean the original thermal film from the mating surfaces (circled below) of the bottom housing and thermal pipe. Use a plastic

RJ-11 Modem Filter Board Tools This procedure requires the following tools: • Torx-6 screwdriver Part Location Preliminary Steps Before you begin, do

iMac (Flat Panel) Power Mac G4 - 1

Procedure 1. Remove two screws and disconnect the cable from the modem. 2. Remove the RJ-11 board from the I/O port. Warning: Whenever the bottom ho

Modem Tools This procedure requires the following tools: • Torx-8 screwdriver Part Location Preliminary Steps Before you begin, do the following: •

Procedure 1. Remove two screws and disconnect the cable. 2. Lift the modem from the connector on the logic board. Warning: Whenever the bottom housi

Memory (factory-installed) Tools This procedure requires the following tools: • No tools are required Part Location Note: The factory-installed memor

Procedure 1. Push down on the ejector tabs to release the memory module. 2. Pull the memory up and out of the slot. Warning: Whenever the bottom hou

Battery Tools This procedure requires the following tools: • No tools are required Part Location Preliminary Steps Before you begin, do the following

Procedure 1. Using a flatblade screwdriver, gently pry the battery from the battery holder. Warning: Whenever the bottom housing is opened for service

Logic Board Tools This procedure requires the following tools: • Phillips #2 screwdriver (for the plastic screw) • Torx-15 screwdriver Part Location

Procedure 1. Remove the three metal torx screws and the one plastic screw. Logic Board iMac (Flat Panel) Take Apart - 25

2. Grab the logic board by the battery retainer and the hard drive connector. Lift the board and pull back to release the board from the bottom housi

Service Source Take Apart iMac (Flat Panel) © 2002 Apple Computer, Inc. All rights reserved.

is separated from the bottom housing could cause these parts to overheat. Short term separation, where the thermal pads are not handled excessively (a

I/O Port Covers Tools This procedure requires the following tools: • No tools are required Part Location Preliminary Steps Before you begin, do the f

Procedure 1. Gently remove the I/O port covers from the logic board. Warning: Whenever the bottom housing is opened for service, you must do two thin

Thermal Pad Installation Tools • No tools are required. • Thermal pad kit Part Location Warning: Whenever the logic board is removed, you must inst

Procedure 1. Remove the old thermal pads (shown below) from the bottom housing. Note: If you don’t see all three thermal pads on the bottom housing,

AC Line Filter Tools This procedure requires the following tools: • Torx-10 screwdriver Part Location Preliminary Steps Before you begin, do the fol

Procedure 1. Peel back the black insulator on the bottom housing to access the AC line filter screws. 2. Remove two screws and lift the AC line filter

Warning: Whenever the bottom housing is opened for service, you must do two things: 1.You must clean the original thermal film from the surfaces joini

Drive Carrier Assembly (Optical and Hard Drive) Tools This procedure requires the following tools: • Torx-10 screwdriver Part Location Preliminary St

Procedure 1. Rotate the base unit so the optical drive door is facing up (as shown below). 2. Remove two screws on the EMI shield. Carefully lift th

Tools The following tools are recommended for the take apart procedures. • service repair kit (076-0900) includes: – the service stand (076-0898) – d

3. Remove four screws attaching the drive carrier to the metal chassis (also known as the Faraday cage). Drive Carrier Assembly (Optical and Hard Dri

4. With the drive door still positioned at the top, look for the white plastic clip attached to the side of the drive carrier. Open the clip and remo

5. Grasp the carrier on both sides. Lift and pull the carrier in the direction of the arrow. Once the carrier is out, flip the carrier to the right to

8. Remove the hard drive from the carrier. 9. Remove four screws (shown by circles) to remove the optical drive from the carrier. 10. Slide the opt

1.You must clean the original thermal film from the surfaces joining the thermal interface layer and reapply thermal paste to the thermal pipe. 2. You

Power Supply Tools This procedure requires the following tools: • Torx-10 screwdriver Part Location Preliminary Steps Before you begin, do the follow

Procedure 1. Remove the two power supply screws circled below. Power Supply iMac (Flat Panel) Take Apart - 43

2. Open the optical drive door as shown to locate the two hidden screws near the drive door. Remove the four screws. Note: Support the metal plate an

3. Remove the power supply from the chassis, keeping the two halves connected. 4. Replacement Note: When replacing the metal plate (see picture abo

Warning: Whenever the bottom housing is opened for service, you must do two things: 1.You must clean the original thermal film from the surfaces joini

1. Support the computer by neck and the base (A). Gently position the computer in the service stand with the flat panel facing up (B). 2. Note: The

Optical Drive Door Tools This procedure requires the following tools: • Torx-10 screwdriver • Needlenose pliers Part Location Preliminary Steps Befo

Procedure 1. Remove the four screws on the power supply metal shield. Set the shield aside. Important: The two screws near the door hinge are shorter

2. Slide the plastic door frame off the chassis. 3. Carefully remove the two door springs with a needlenose pliers. Optical Drive Door iMac (Flat Pa

4. Remove the door hinge screws. 5. Open the door open. 50 iMac (Flat Panel) Take Apart Optical Drive Door

6. Slide the door and hinge off the frame. Remove the door from the base. Warning: Whenever the bottom housing is opened for service, you must do two

Speaker, Internal Tools This procedure requires the following tools: • Torx-10 screwdriver Part Location Preliminary Steps Before you begin, do the f

Procedure 1. Loosen the two screws enough to slide the speaker off the metal posts. Disconnect the speaker cable. Warning: Whenever the bottom housin

Fan Tools This procedure requires the following tools: • Torx-15 screwdriver Part Location Preliminary Steps Before you begin, do the following: • P

Procedure 1. Remove the two fan screws and disconnect the fan connector. 2. Lift the fan out of the chassis (Faraday cage). Warning: Whenever the bo

Power Supply Insulators Tools No tools are required for this procedure. Part Location Preliminary Steps Before you begin, do the following: • Positio

User Access Plate Tools This procedure requires the following tools: • Phillips #0 screwdriver Part Location Preliminary Steps Before you begin, do

Procedure 1. Carefully pull the insulators from the chassis (Faraday cage). These are attached to the chassis with double-sided tape. Warning: Whenev

Neck Cable Retainer (under fan) Tools This procedure requires the following tools: • Torx-10 screwdriver Part Location Note: View the document at a l

Procedure 1. WIth the optical door oriented upward, remove the four screws connecting the plastic cable retainer to the chassis (Faraday cage). Note:

Fan Gasket Tools No tools are required for this procedure. Part Location Preliminary Steps Before you begin, do the following: • Position the compute

Procedure 1. Remove the plastic cable retainer and turn it over. Gently peel the fan gasket off the back of the cable retainer. Warning: Whenever the

Cap, Neck Spoke Retainer Tools This procedure requires the following tools: • Torx-10 screwdriver Part Location Preliminary Steps Before you begin,

Procedure 1. The neck cables are highlighted below. Note the cable routing, including the blind mate connector orientation before removing the cap sc

Warning: Whenever the bottom housing is opened for service, you must do two things: 1.You must clean the original thermal film from the surfaces joini

Blind Mate Connector Tools This procedure requires the following tools: • Torx-10 screwdriver Part Location Preliminary Steps Before you begin, do th

Procedure 1. Remove the two blind mate screws. Replacement Note: The tab on the blind mate connector faces inward. 2. Lift the blind mate connector

Procedure 1. Loosen the four captive screws on the access panel. 2. Remove the panel by grabbing onto two captive screws and lift the panel off the

Chassis (Faraday Cage) Tools This procedure requires the following tools: • Torx-10 screwdriver • Torx-8 screwdriver for the logo screw Part Locatio

• Remove the plastic cable retainer (under the fan). • Remove the neck cap spoke retainer. • Remove the blind mate connector screws. Procedure 1.

3. Carefully feed the neck cables through the hole in the Faraday cage. Important: The Faraday cage is very heavy and has sharp edges; handle with ca

4. Pull the outer shell (with Faraday attached) away from the neck. Note: There is no need to remove the outer shell from the Faraday unless you are

Housing, Outer Shell, Plastic Tools This procedure requires the following tools: • Torx-10 screwdriver Part Location Preliminary Steps Before you be

• Remove the blind mate connector screws. Procedure 1. Carefully feed the neck cables through the hole in the Faraday cage. Important: The Faraday c

2. Pull the outer shell (with Faraday attached) away from the neck. Note: There is no need to remove the outer shell from the Faraday unless you are

Warning: Whenever the bottom housing is opened for service, you must do two things: 1.You must clean the original thermal film from the surfaces joini

Display, Flat Panel Tools This procedure requires the following tools: • 1.5 mm hex tool • Plastic stylus to lift the panel Part Location Preliminar

Procedure 1. Remove ten screws connecting the back cover to the flat panel LCD display. 2. It is not necessary to remove the two screws shown below;

AirPort Card Tools This procedure requires no tools. Part Location Preliminary Steps Before you begin, do the following: • Position the computer in t

3. With a plastic tool, raise the display to access cables underneath the flat panel. 4. Disconnect the inverter cable shown below. Display, Flat Pan

5. Raise the display to disconnect the circled items: the antenna, the inverter cable, the microphone, and the power on LED. Then, peel the tape away

6. This shows a close up of the video cable, ferrite bead, and video cable clip. After removing the tape, carefully use a screwdriver to pry the ferr

7. Lift the flat panel off the back cover. You are left with the LCD flat panel service part. 80 iMac (Flat Panel) Take Apart Display, Flat Panel

Inverter Tools This procedure requires the following tools: • Torx-8 screwdriver Part Location Preliminary Steps Before you begin, do the following:

Procedure 1. Remove the three screws and then slide the inverter in the direction of the arrow. 2. Turn the inverter over and disconnect the inverte

Antenna, Wireless Tools This procedure requires the following tools: • Torx-6 screwdriver, or allen head • Torx-8 screwdriver • 5mm socket Part Loc

Procedure 1. Remove two external T-6 screws attaching the antenna to the back cover Note: View this page at a larger size to enlarge the graphics. 2.

Panel Shield Tools This procedure requires the following tools: • Torx-8 screwdriver • Torx-10 screwdriver Part Location Preliminary Steps Before yo

Procedure 1. Remove the three T-8 screws on the metal cable retainer. Lift the cable retainer off the panel shield. 2. Remove the four T-10 screws o

Procedure 1. Unplug all cables from the computer except the power cord. 2. Important: To avoid electrostatic discharge, always ground yourself by to

3. Gently pull the cables through the hole in the panel shield. Panel Shield iMac (Flat Panel) Take Apart - 87

4. Line up the notches on the panel shield hole with the video cable. Gently pull the video cable through the panel shield (See next graphic for a cl

Back Cover, Display Tools No tools are required. Part Location Preliminary Steps Before you begin, do the following: • Position the computer in the s

Procedure 1. Lift the display cover off the neck assembly. 90 iMac (Flat Panel) Take Apart Back Cover, Display

Neck Assembly Tools This procedure requires the following tools: • Torx-10 screwdriver Part Location Preliminary Steps Before you begin, do the follo

• Remove the plastic cable retainer (under the fan). • Remove the cap spoke holder. • Remove the blind mate connector screws. • Remove the Faraday

Base Reassembly Procedure 1. Refer to the Exploded View drawing during reassembly. 2. Attach the metal neck plate (the round, metal plate with hole

4. Thread the neck cables through the hole in the metal neck plate. 94 iMac (Flat Panel) Take Apart Base Reassembly

5. Replace the two black neck cap screws to connect the neck to the chassis. 6. Route the neck cables in the base (as shown) and replace the three s

7. Attach the speaker. 8. Attach the blind mate connector and screws. Remember, the tab on the blind mate connector faces inward. 96 iMac (Flat Pan