Apple g5 manuale d’uso

 Service Source © 2005 Apple C omputer , Inc. All rights r eserved. iMac G5 (20-inch, iSight) 1 4 Januar y 2008[...]

ii iMac G5 (20-inch, iSight) Contents T ake Apart General Information 6 Pr oduct View 6 What’ s New 6 T ools Required 7 Orientation 7 Serial Number Location 7 Safety 8 Opening the Computer 9 Access T ool Modication 9 EMI Shielding 1 2 Low er EMI Shield 1 3 Speakers 1 4 Access Door 1 6 Front Bezel 1 8 Camera Board 2 6 Lower EMI Shield 32 IR Boa[...]

iii AC Line Filter 97 Fan, Hard Drive 101 Fan, Optical Drive 105 Fan, CPU 10 8 Power Supply , DC/DC, Inverter 11 1 Ambient Light Sensor Board 1 14 Cable, Camera and IR 1 17 W ireless Antenna 120 Clutch 124 Chassis 12 8 Rear Housing 131 Stand 134 T r oubleshooting General Information 13 9 Serial Number Location 1 39 Accessing the Diagnostic LEDs 1 3[...]

iv Mouse 1 7 3 Keyboard 1 7 4 Error Beep(s) 1 76 USB 1 77 V iews iMac G5 (20-inch iSight)—Upper Exploded View 1 79 iMac G5 (20-inch iSight)—Lower Exploded View 1 80 Screw Chart 181 iMac (iSight 20-inch) Screws page 1 1 8 1 iMac (iSight 20-inch) Screws page 2 1 82[...]

 Service Source © 2005 Apple C omputer , Inc. All rights r eserved. T ake Apart iMac G5 (20-inch, iSight)[...]

iMac G5 (20-inch iSight) T ak e Apart — G eneral Information 6 General Information Pr oduct V iew What’ s New January 2008 T ake Apart: Corrupted graphic in the “Cable, Camera and IR” take apar t section has been • corrected. April 2007 The • optical drive remo val procedure has been updated . Using a screwdriver t o release the optical[...]

iMac G5 (20-inch iSight) T ak e Apart — G eneral Information 7 T ools Requir ed The following t o ols are required to service the computer . Note that a special acce ss card (part 9 22-7 1 72) is required to open the fr ont bezel. ESD-safe workstation and ma t • Soft, clean towel or cloth (to protect the display and r emoved parts from scratche[...]

iMac G5 (20-inch iSight) T ak e Apart — G eneral Information 8 Safety W arning: W hen the iMac G5 (iSight) is under power , be aware that the power supply con tains high voltages that pose a poten tial hazard to your personal safety . Never work on or near the power supply with the unit pow ered on, and as a fur ther precaution always make sure t[...]

iMac G5 (20-inch iSight) T ak e Apart — G eneral Information 9 Opening the Computer Apple authorized , desktop certied technicians only should ever remov e the front bezel on the iMac G5 (iSight). When the front bez el is removed, be sure to alwa ys ground yourself and follow ESD-safe repair practices Removing the front bez el requires using a[...]

iMac G5 (20-inch iSight) T ak e Apart — G eneral Information 10 Cut the EMI gasket to the edge of the access car d. 2. Using packing tape, or something equivalent, fold the tape ov er the EMI gasket to attach the 3 . gasket to the card.[...]

iMac G5 (20-inch iSight) T ak e Apart — G eneral Information 11 Bend the card at a slight angle at the top to make sure the car d makes contact with each 4. latch. Refer to the 5. F ront Beze l take-apart procedure for complete instructions.[...]

iMac G5 (20-inch iSight) T ak e Apart — G eneral Information 12 EMI Shielding The iMac enclosure is wrapped in EMI shielding that is easily torn and damaged. T o maintain a properly shielded unit, you must repair all accidental tears and cracks t o the shielding by covering them with EMI tape . Order EMI tape, par t number 92 2-4786 (a long , thi[...]

iMac G5 (20-inch iSight) T ak e Apart — G eneral 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[...]

iMac G5 (20-inch iSight) T ak e Apart — G eneral Information 14 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. Speakers The speakers shown in this manual are black, howev er the [...]

iMac G5 (20-inch iSight) T ak e Apart — G eneral Information 15[...]

iMac G5 (20-inch iSight) T ak e Apart — Access Door 16 Access Door T ools Phillips #2 screwdriver • ESD-safe workstation and mat • Soft , clean t owel or cloth • Pr eliminary Steps Before you begin, lay the comput er down so the panel is face down and the bottom is facing you. Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart — Access Door 17 Removing the Access Door Raise the stand and use a Phillips #2 screwdriver , to loosen the two captive acce ss door 1. screws. W arning: The ambient light sensor is located between the two screws , as sho wn in the graphic. Don ’t mistake the ambient light sensor for a scr ew . Sticking a s[...]

iMac G5 (20-inch iSight) T ak e Apart — Front Bezel 18 Front Bezel T ools T orx T8 screwdriver • Access car d tool 9 22-7 1 72 • ESD mat, soft , clean t owel or cloth • Pr eliminary Steps Before you begin, remov e the access door . Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart — Front Bezel 19 Removing the Fr ont Bezel P osition unit on rear cover (back). 1. Tilt up the front bezel and remo ve three screws along the bottom. 2. W arning: The ambient light sensor is located next to the center scr ew . Don ’t mistake the ambient light sensor for a scr ew . S ticking a screwdriver or[...]

iMac G5 (20-inch iSight) T ak e Apart — Front Bezel 20 This picture shows how the acce ss tool works. Pushing the tool up the v ent on the rear co ver 4. releases the latche s on the inside of the front bezel. Refer to the next step f or the procedure . Start on the lef t side (looking from the back of the unit). A s you insert the card to diseng[...]

iMac G5 (20-inch iSight) T ak e Apart — Front Bezel 21 Repeat step 5 to release the locking latch in the right corner . Again, pull the bezel away as 6. the card releases the lat ch. If the bezel won ’t release, pull the bottom of the bezel out a bit and insert the access card 7. again.[...]

iMac G5 (20-inch iSight) T ak e Apart — Front Bezel 22 Repeat step 7 for the left side. 8. Once the access card has been r emoved , it is saf e to open the bezel. Position the unit on an 9. ESD mat, with the bottom facing toward y ou. Lift up the top of the bezel and pull it up and slightly towar d you. Caution: Make sure the memory ejec t rings [...]

iMac G5 (20-inch iSight) T ak e Apart — Front Bezel 23 Swing the bezel up so you can disc onnect two cables on the camera board at the top of the 1 0. bezel. Disconnect the camera and microphone cables from the camera board . 11 . Lift the front bezel o the comput er . 1 2. Note the microphone is part of the front bezel assembly .[...]

iMac G5 (20-inch iSight) T ak e Apart — Front Bezel 24 Replacing the Fr ont Bezel Make sure the black EMI shielding along the top of the L CD panel is not in the way of the 1. bezel latche s when you lower the fr ont bezel ont o the computer . Use a black stick to press (re-stick) the EMI shielding onto the panel. Connect the camera and microphon[...]

iMac G5 (20-inch iSight) T ak e Apart — Front Bezel 25 T uck the cables neatly into the channel on the rear housing . 3. Continue t o lower the fon t bezel down over the pull rings (in the memory compar tment) 4. and then press the top corners of the fron t bezel to connect the magnetic latches. Note : check that the latches ar e connected by lif[...]

iMac G5 (20-inch iSight) T ak e Apart — Camera Board 26 Camera Board T ools T orx T6 screwdriver • ESD mat, soft , clean t owel or cloth • Pr eliminary Steps Before you begin, remov e the access door and fron t bezel. Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart — Camera Board 27 Removing the Camera Board The camera board and cables ar e visible as you lift the front bezel o the computer . 1. Disconnect the camera and microphone cables. 2.[...]

iMac G5 (20-inch iSight) T ak e Apart — Camera Board 28 Remove the two T6 screws on the camera board . 3. P eel back the clear mylar material to free the microphone cable from the camer a board. 4.[...]

iMac G5 (20-inch iSight) T ak e Apart — Camera Board 29 Remove the camera board fr om the front bezel. 5.[...]

iMac G5 (20-inch iSight) T ak e Apart — Camera Board 30 Replacing the Camera Board Replace the camera board on the fron t bezel. Carefully align and insert the camera lens until 1. it is snug in the bezel aperture Replace the two screws on the camera board . Route the microphone cable under the clear 2. mylar . Connect the camera and microphone c[...]

iMac G5 (20-inch iSight) T ak e Apart — Camera Board 31 T uck the camera board cables neatly into the channel on the r ear housing. 4. Continue t o lower the fon t bezel down over the pull rings (in the memory compar tment) 5 . and then lower the top c orners of the front bezel so they connect with the magnetic latches . Note : check that the lat[...]

iMac G5 (20-inch iSight) T ak e Apart — Lower EMI Shield 32 Lower EMI Shield T ools The only tool required f or this procedure is a black stick (or other nonconductive nylon or plastic at-blade tool). Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart — Lower EMI Shield 33 Removing the Lower EMI Shield Carefully peel the EMI shields o the each side of the low er rear housing. Use a black stick to 1. help peel back the shields. Carefully peel the low er EMI shield o the bottom edge of the rear housing . Use a black 2. stick to help peel back the shiel[...]

iMac G5 (20-inch iSight) T ak e Apart — Lower EMI Shield 34 P eel the lower EMI shield upward to remo ve or view the: 3. L CD display panel • Speakers • IR board • AirP or t Ex treme/Bluetooth card • T • roubleshooting LEDs[...]

iMac G5 (20-inch iSight) T ak e Apart — Lower EMI Shield 35 Replacing the Lower EMI Shield P osition the lower EMI shield over the bottom of the unit so that the hole s (for the IR board 1. and the LED) in the shield are properly aligned . Pr ess the sticky , edge of the EMI shield on to the bottom side of the display panel. The crease 2. in the [...]

iMac G5 (20-inch iSight) T ak e Apart — IR Board 36 IR Board T ools The only tool required f or this procedure is a T or x T6 screwdriver . Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shield • Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart — IR Board 37 Removing the IR Board Disconnect the IR cable from the IR board connector . 1. Using a T orx T6 scr ewdriver , remove the two IR boar d screws. Remove the IR board from its 2. mounting bracket. Using a T orx T6 scr ewdriver , remove the two IR boar d mounting screws. Remove the IR boar d 3. moun[...]

iMac G5 (20-inch iSight) T ak e Apart — IR Board 38 Note 4. : If you ar e replacing the IR cable, you must remo ve the optical drive and disconnect the cable from the logic board .[...]

iMac G5 (20-inch iSight) T ak e Apart — IR Board 39 Replacing the IR Board Route the IR cable as shown below and make sure the cable is connected to the logic board . 1. Install the IR board mounting bracket and screws. 2.[...]

iMac G5 (20-inch iSight) T ak e Apart — IR Board 40 Replace the IR board onto the moun ting bracket. Connect the cable and replace the two T6 3. screws. Replace the lower EMI shield . 4. Replace the front bez el. 5. Replace the access door . 6.[...]

iMac G5 (20-inch iSight) T ak e Apart — Display P anel 41 LCD Display Panel T ools T orx T6 screwdriver . • T orx T1 0 screwdriver • Black stick (or other nonconductive nylon or plastic at-blade tool) • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shield • Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart — Display P anel 42 Removing the Display Panel Using your ngers or a black stick, carefully peel the EMI tape o the right and left sides of 1. the lower housing . P eel the bottom of the EMI shield o the frame. 2.[...]

iMac G5 (20-inch iSight) T ak e Apart — Display P anel 43 P eel the EMI housing up as shown. 3. Using the access tool, a black stick, or your ngers, peel the black EMI tape o the right and 4. left sides of the panel.[...]

iMac G5 (20-inch iSight) T ak e Apart — Display P anel 44 Using the access tool or black stick, peel back the black EMI tape stuck along the entire 5. length of the top panel.[...]

iMac G5 (20-inch iSight) T ak e Apart — Display P anel 45 Using a T orx T6 scr ewdriver , remove the two TMDS connector screws. P ull the black tab on 6. the connector to disconnect the TMDS cable from the logic board. Using a T orx T1 0 screwdriver , remove the four panel moun ting screws. 7.[...]

iMac G5 (20-inch iSight) T ak e Apart — Display P anel 46 Lift the panel up just enough to see the inverter cables on the left side. 8. Disconnect the two panel-to-inv er ter cables on the bottom left side of the displa y . 9. Replacement Note : The cable connectors are marked with dots to indicate “right-side-up ” .[...]

iMac G5 (20-inch iSight) T ak e Apart — Display P anel 47 Raise the panel up the rest of the way to locat e the two inv erter cables on the top left side of 1 0. the display . Replacement Note : The cable connectors are marked with dots to indicate “right-side up ” . Lift the panel o the computer . 11 . Note : If replacing the displa y pan[...]

iMac G5 (20-inch iSight) T ak e Apart — Display P anel 48 Replacing the Display Panel Replace the TMDS cable on the rear of the display panel. 1. If removed , r eplace the metal panel mounting brackets to each side of the display . 2. Connect the four in verter-to-display cable connectors. Remember the connectors are keyed; 3. dot-side-up. Replac[...]

iMac G5 (20-inch iSight) T ak e Apart — M emory 49 Memory T ools Phillips #2 screwdriver • ESD mat, soft , clean t owel or cloth • Pr eliminary Steps Before you begin, lay the comput er down so the panel is face down with the bottom is facing you; and remo ve the access door . Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart — M emory 50 Removing the Memory After removing the acce ss door , touch the metal frame around the memor y compartment to 1. discharge any sta tic electricit y from your body . Important: Always discharge static bef ore you touch an y par ts such as the memor y board. T o av oid generating static electricity[...]

iMac G5 (20-inch iSight) T ak e Apart — M emory 51 Replacing the Memory Insert the memor y mo dule into the memory compar tment. The module ts in the slot only 1. one way (see graphic below). Note : Refer to the illustrations on the bottom of the stand f or additional memor y installation information. Replace the access door using it to push t[...]

iMac G5 (20-inch iSight) T ak e Apart — Speak ers 52 Speakers T ools T orx T1 0 screwdriver • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d Display P ane • l Part Location Note: The speakers on all production units are white. The following phot os were taken on a pre- prod[...]

iMac G5 (20-inch iSight) T ak e Apart — Speak ers 53 Removing the Speakers Using a T1 0 tor x screwdriver , remove the scr ews from the left and right speakers. 1. Replacement Note: The longer of the tw o speaker mounting screws is used to secur e the left speaker; the shor ter screw secures the right speaker . Using a T6 torx screwdriver , remov[...]

iMac G5 (20-inch iSight) T ak e Apart — Speak ers 54 Remove the IR mounting br acket screws. Lift the brack et o the logic board to free the 3. speaker cable. Replacement Note: T ak e note of the location and positioning of the speaker cable (top cable in this photo) for reinstalla tion later . Lift the speaker 4. s and attached cable straight[...]

iMac G5 (20-inch iSight) T ak e Apart — Speak ers 55 Under the right speaker , disconnect the speaker cable from the logic board. 5.[...]

iMac G5 (20-inch iSight) T ak e Apart — Speak ers 56 Replacing the Speakers Connect the speaker cable to the logic board . 1. Install the speakers and route the speaker wire as sho wn below . 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 [...]

iMac G5 (20-inch iSight) T ak e Apart — Speak ers 57 Install the IR board and two T6 screws to the IR mounting bracket. 6. Replace the display panel. 7. Replace the lower EMI shield . 8. Replace the front bez el. 9. Replace the access door . 1 0.[...]

iMac G5 (20-inch iSight) T ak e Apart — AirPort Extreme/Bluetooth Card 58 AirPort Extreme/Bluetooth Card T ools T orx T6 screwdriver • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d Display P ane • l Speaker • s Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart — AirPort Extreme/Bluetooth Card 59 Removing the AirPort Extreme/Bluetooth Card Using a T6 torx screwdriver , remove the two screws on the AirP ort Ex treme/Bluetooth card . 1. Pull the card str aight up to disconnect it from the logic board . Disconnect the two antenna cables from the AirP ort Ex treme/Bluet[...]

iMac G5 (20-inch iSight) T ak e Apart — AirPort Extreme/Bluetooth Card 60 Replacing the AirPort Extreme/Bluetooth Card Connect the two antenna cable s to the card . 1. Pr ess the AirP or t Ex treme/Bluetooth card ont o the logic board connector . Mak e sure the card 2. and antennas are secur ely connected before installing the speakers. Replace t[...]

iMac G5 (20-inch iSight) T ak e Apart — Optical Dr ive 61 Optical Drive T ools T orx T1 0 screwdriver • T orx T6 screwdriver • Needlenose pliers (with teeth) • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d Display P ane • l Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart — Optical Dr ive 62 Removing the Optical Drive Looking at the circles below , star ting with the top circle, do the follo wing: 1. P eel back the silver EMI tape going from the chassis frame to the optical drive , remo ve the two T6 screws on the optical drive ex cable, disconnect the exible cable, and [...]

iMac G5 (20-inch iSight) T ak e Apart — Optical Dr ive 63 Note 2. : Make sure to use a needlenose pliers with teeth t o remove the optical driv e. The pliers must have a t extured sur face to properly grasp the optical drive release tabs . Locate the black tabs a t each side of the plastic optical drive mounting bracket. Star ting at 3 . the rele[...]

iMac G5 (20-inch iSight) T ak e Apart — Optical Dr ive 64 Caution: Nev er press down on or grasp the body (silver) of the optical drive when r emoving or installing it. Depressing the body of the optical drive could damage the mechanism. Grasp the optical drive by its mounting bracket only . W arning 4. : iMac main logic boards returned with phys[...]

iMac G5 (20-inch iSight) T ak e Apart — Optical Dr ive 65 This photo shows the optical driv e out of the computer so you can visualize ho w the clips 5. move . Pressing down (#1) r eleases the clips (#2) outward from the metal chassis. Caution: Nev er press down on or grasp the body of the optical drive when remo ving or installing it. Pressing o[...]

iMac G5 (20-inch iSight) T ak e Apart — Optical Dr ive 66 If replacing the optical drive, disconnect the sensor cable from the optical sensor located on 7. the underside of the optical drive. T ransfer the sensor cable to the replacement drive . Note: T he optical drive sensor can be identied by the pre sence of resistor R1 70 1 . T he hard 8.[...]

iMac G5 (20-inch iSight) T ak e Apart — Optical Dr ive 67 Replacing the Optical Drive Install the black sensor cable and the ex cable to the optical drive with two T6 screws. 1. Insert the optical dr ive bezel int o the rear housing , lining up the bezel with the slot opening 2. (#1) . Be sure to align the two guide holes in the front bez el w[...]

iMac G5 (20-inch iSight) T ak e Apart — Optical Dr ive 68 Connect the optical drive sensor to the logic board , a ttach the ex cable and secure it with 3. the T6 screws, and reattach the silver EMI tape. Replace the display panel. 4. Replace the lower EMI shield . 5. Replace the front bez el. 6. Replace the access door . 7.[...]

iMac G5 (20-inch iSight) T ak e Apart — Optical Dr ive 69 Handling Slot-Load Optical Drives F ollow the instructions in this section carefully . This procedure shows how to handle slot-load optical drives when they are outside the comput er . Obser ve ESD (electrostatic discharge) guidelines when handling optical driv es. •[...]

iMac G5 (20-inch iSight) T ak e Apart — Optical Dr ive 70 Handle the drive only by the sides and back edge . • Do not touch the front of the drive . •[...]

iMac G5 (20-inch iSight) T ak e Apart — Optical Dr ive 71 Do not press on the drive or lift it by the top and bottom co ver . • Do not handle the drive by the gull wing edge only . •[...]

iMac G5 (20-inch iSight) T ak e Apart — Optical Dr ive 72 When storing optical drives , use appro ved packaging boxes . Nev er stack loose drives. • When returning a defective optical drive , use the original packaging and an antistatic bag . • P ack only one drive per box.[...]

iMac G5 (20-inch iSight) T ak e Apart — Hard Drive 73 Hard Drive T ools T orx T1 0 screwdriver • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d Display P ane • l Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart — Hard Drive 74 Removing the Hard Drive Remove the two T1 0 screws attaching the hard drive to the DC/DC in ver ter board 1. Disconnect the hard drive sensor cable from the connector on the logic board . 2. Note the location of the sensor on the side of the hard drive and the routing of the cable .[...]

iMac G5 (20-inch iSight) T ak e Apart — Hard Drive 75 The hard drive sensor is di eren t from the optical drive sensor . The hard driv e sensor can be 3. identied by re sistor R1 700. Replacement Note : Make sure to transfer the sensor to the replacement har d drive. Use the double-stick tape enclosed with the replacement har d drive to att[...]

iMac G5 (20-inch iSight) T ak e Apart — Hard Drive 76 Disconnect the hard drive power and data cable s. 5. If you are replacing the hard driv e, remove the t emperature sensor , mounting bracket, and 6. mounting pins (circled) befor e returning the dr ive to Apple . T ransfer these parts to the replacement drive .[...]

iMac G5 (20-inch iSight) T ak e Apart — Hard Drive 77 Replacing the Hard Drive Attach the hard drive sensor and sensor cable t o the side of the hard drive. 1. Attach the mounting bracket and pins if they wer e removed . Connect the hard drive data 2. and power cables .[...]

iMac G5 (20-inch iSight) T ak e Apart — Hard Drive 78 Route the hard drive sensor cable under the metal chassis. Connect the sensor cable to the 3 . logic board. Insert the hard drive pins into the grommets. Low er the dr ive into the r ear housing. 4.[...]

iMac G5 (20-inch iSight) T ak e Apart — Hard Drive 79 Secure the two T1 0 screws on the hard drive mounting bracket to the DC/DC/inv er ter board. 5. Replace the display panel. 6. Replace the lower EMI shield . 7. Replace the front bez el. 8. Replace the access door . 9.[...]

iMac G5 (20-inch iSight) T ak e Apart —Pow er Supply , AC/DC 80 Power Supply , AC/DC T ools T orx T1 0 screwdriver • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d Display P ane • l Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart —Pow er Supply , AC/DC 81 Removing the AC/DC Power Supply W ARNING: The AC/DC power supply PCB r emains p ower ed up whenever the sy stem is plugged in, whether or not the system has been turned on. U se extreme caution when troubleshooting the system with the fr ont bezel removed . Don’ t work alone. In th[...]

iMac G5 (20-inch iSight) T ak e Apart —Pow er Supply , AC/DC 82 Lift the power supply up and remov e the cable and connector from under the chassis. This 2. cable connects to the AC lter board loca ted under the logic board . Note the routing of the cable under the chassis. Disconnect the two power supply cables; the lef t cable connects to th[...]

iMac G5 (20-inch iSight) T ak e Apart —Pow er Supply , AC/DC 83 Replacing the AC/DC Power Supply W ARNING: The AC/DC power supply PCB r emains p ower ed up whenever the sy stem is plugged in, whether or not the system has been turned on. U se extreme caution when troubleshooting the system with the fr ont bezel removed . Don’ t work alone. In t[...]

iMac G5 (20-inch iSight) T ak e Apart —Pow er Supply , AC/DC 84 T uck the cables under the DC/DC power supply/in verter and the metal chassis as shown. 2. Replace the power supply screws . Install the machine screw (bottom right corner) rst when 3 . installing the power supply . Replace the display panel. 4. Replace the lower EMI shield . 5. R[...]

iMac G5 (20-inch iSight) T ak e Apart —Pow er Supply , AC/DC 85 Replace the display panel. 8. Replace the lower EMI shield . 9. Replace the front bez el. 1 0. Replace the access door . 11 .[...]

iMac G5 (20-inch iSight) T ak e Apart —Logic Board 86 Logic Board T ools T orx T1 0 screwdriver • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d Display P ane • l Speaker • s Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart —Logic Board 87 Removing the Logic Board Remove the AirP or t Extreme/Bluetooth card from the logic board . Disconnect the antennas 1. Disconnect the optical cable, ex cable, and peel back the silver EMI tape from the logic 2. board frame.[...]

iMac G5 (20-inch iSight) T ak e Apart —Logic Board 88 Using a T1 0 tor x screwdriver , remove the sev en screws on the board. Remove the self- 3. tapping screws rst (black and yellow thinner cir cles). Replacement Note : Always install the machine screws (shown with wide white circle s) before installing the self-tapping screws At the top of t[...]

iMac G5 (20-inch iSight) T ak e Apart —Logic Board 89 Note: 5. If the replacement logic board doesn ’t hav e the suppor t brackets (shown below) installed on the heatsink, transfer them to the replacemen t logic board. Remove the tw o T6 screws on the top of the brackets and the T7 screws from the side support bracket. Disconnect nine cables fr[...]

iMac G5 (20-inch iSight) T ak e Apart —Logic Board 90 Lift the board enough to disconnect the hard drive data cable located on the underside of 7. the metal railing , on the lef t. Holding the board by the sides , lift it up and towar d the top of the computer . 8. Note : Remove the memor y module from the slot before r eturning the board to Appl[...]

iMac G5 (20-inch iSight) T ak e Apart —Logic Board 91 When handling the logic board , hold the board as sho wn below . 9. Important : Never handle or carr y the board by the heatsink or metal rails.[...]

iMac G5 (20-inch iSight) T ak e Apart —Logic Board 92 Replacing the Logic Board P osition all the logic board cables out of the way (exc ept for the hard drive cable tha t 1. attaches underneath) so the logic board can be placed int o the rear housing. As you low er the board into the r ear housing, make sure the memor y pull-tabs are lower ed 2.[...]

iMac G5 (20-inch iSight) T ak e Apart —Logic Board 93 Connect the hard drive data cable to the underside of the boar d (on the left side). 4. Note : T he hard drive is remov ed so you can see the location of the cable and its routing. Make sure the hard drive sensor and the sensor cable are attached to the side of the har d 5. drive. Route the se[...]

iMac G5 (20-inch iSight) T ak e Apart —Logic Board 94 Replace the optical drive sensor cable , ex cable and screws, and the silver EMI tape. 6. Using a T1 0 tor x screwdriver , replace the seven screws on the boar d. Always install the 7. machine screws (drawn in y ellow/white circles) bef ore installing the self-tapping screws (shown in orang[...]

iMac G5 (20-inch iSight) T ak e Apart —Logic Board 95[...]

iMac G5 (20-inch iSight) T ak e Apart —Logic Board 96 Connect the following cables t o the connec tors on the logic board. Connectors are sho wn 8. star ting in the lower left corner , proceeding clockwise Note : The hard drive sensor cable and the optical sensor cable were connected earlier in the procedur e. - Hard drive fan - P ower on - Hard [...]

iMac G5 (20-inch iSight) T ak e Apart —AC Line Filter 97 AC Line Filter T ools T orx T1 0 screwdriver • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d IR Board • Display P ane • l Speaker • s Hard Drive • P ower Supply , AC/D • C Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart —AC Line Filter 98 Removing the AC Line Filter Using a torx T1 0 screwdriv er , remove the three self-tapping screws fr om the power inlet and 1. the machine screw from the pow er inlet ground cable . Carefully peel up the EMI tape on the AC lt er; peel o both the large and small EMI pieces 2. of tape. [...]

iMac G5 (20-inch iSight) T ak e Apart —AC Line Filter 99 Disconnect the AC lter cable from the pow er supply . Notice the routing of the AC lter 3 . cable under the chassis. Lift the AC lter out of the rear housing . 4.[...]

iMac G5 (20-inch iSight) T ak e Apart —AC Line Filter 1 00 Replacing the AC Line Filter Install the AC pow er lter on the rear housing screw mounts with thr ee self tapping screws. 1. Install the power inlet ground cable t o the chassis with a machine screw . 2. Route the power inlet cable beneath the chassis as sho wn in the photo above , and[...]

iMac G5 (20-inch iSight) T ak e Apart —Fan, Hard Drive 101 Fan, Hard Drive T ools No tools are required t o remove the har d drive fan. • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d IR Board • Display P ane • l Speaker • s Logic Boar • d Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart —Fan, Hard Drive 1 02 Removing the Hard Drive Fan Once the logic board and speakers hav e been removed , the fan will already be disconnected. Lift the fan straight up and out of the rear housing .[...]

iMac G5 (20-inch iSight) T ak e Apart —Fan, Hard Drive 1 03 Replacing the Hard Drive Fan Low er the fan onto the white posts in the r ear housing. Push it down snug on to the posts. 1. Make sure to route the hard drive da ta cable under the fan as shown in the photo . C onnect 2. the hard drive cable to the logic board if it w as removed during t[...]

iMac G5 (20-inch iSight) T ak e Apart —Fan, Hard Drive 1 04 Replace the logic board . 3. Replace the speakers. 4. Replace the display panel. 5. Replace the IR Board. 6. Replace the lower EMI shield . 7. Replace the front bez el. 8. Replace the memory access door . 9.[...]

iMac G5 (20-inch iSight) T ak e Apart —Fan, Optical Drive 1 05 Fan, Optical Drive T ools No tools are required t o remove the optical driv e fan. • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d IR Board • Display P ane • l Speaker • s Logic Boar • d Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart —Fan, Optical Drive 1 06 Removing the Optical Drive Fan Once the logic board and speakers hav e been removed , the fan will be disconnected. Lift the fan straight up and out of the rear housing .[...]

iMac G5 (20-inch iSight) T ak e Apart —Fan, Optical Drive 1 07 Replacing the Optical Drive Fan Low er the fan onto the white posts in the r ear housing, above the port openings. Route the 1. fan cable around the left side of the fan, through the foam gaskets. Push it down snug onto the posts. Replace the logic board. 2. Replace the speakers. 3. R[...]

iMac G5 (20-inch iSight) T ak e Apart —Fan, CPU 1 08 Fan, CPU T ools No tools are required t o remove the CPU fan. • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d IR Board • Display P ane • l Speaker • s Logic Boar • d Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart —Fan, CPU 1 09 Removing the CPU Fan Once the logic board and speakers hav e been removed , the fan will already be disconnected. Lift the fan straight up and out of the rear housing .[...]

iMac G5 (20-inch iSight) T ak e Apart —Fan, CPU 11 0 Replacing the CPU Fan Low er the fan onto the white standos in the r ear housing. Push it down snug on to the 1. posts. Replace the logic board. 2. Replace the speakers. 3. Replace the display panel. 4. Replace the IR Board. 5. Replace the lower EMI shield . 6. Replace the front bez el. 7. R[...]

iMac G5 (20-inch iSight) T ak e Apart —Pow er Supply , DC/DC, Inverter 111 Power Supply , DC/DC, Inverter T ools T orx T1 0 screwdriver • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d IR Board • Display P ane • l Speaker • s Logic Boar • d Hard Drive • P ower Suppl[...]

iMac G5 (20-inch iSight) T ak e Apart —Pow er Supply , DC/DC, Inverter 11 2 Removing the DC/DC Power Supply/Inverter Using a torx T1 0 screwdriv er , remove the two pow er supply , DC-DC inverter screws 1. connecting the board to the rear housing . Disconnect the t wo cables; one going to the AC- DC power supply and the other connecting to the ha[...]

iMac G5 (20-inch iSight) T ak e Apart —Pow er Supply , DC/DC, Inverter 11 3 Replacing the DC/DC Power Supply/Inverter Route the inv er ter cable under the metal chassis frame. Check the routing of the cable so it 1. doesn ’t get pinched under the chassis. Install the screws on the chassis frame and the AC lt er ground screw . 2. Replace the [...]

iMac G5 (20-inch iSight) T ak e Apart —Ambient Light Sensor Board — 11 4 Ambient Light Sensor Board T ools A black stick or equivalent t ool • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d IR Board • Display P ane • l Speaker • s Logic Bo • a rd Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart —Ambient Light Sensor Board — 11 5 Removing the Ambient Light Sensor Board Remove the rubber bumper from between the chassis and the sensor boar d. 1. Using a black stick, pr y the ambient light sensor o the inside of the rear housing . The sensor 2. is stuck to the rear housing with double-stick tape. N[...]

iMac G5 (20-inch iSight) T ak e Apart —Ambient Light Sensor Board — 11 6 Replace the Ambient Light Sensor Board Pr ess the sticky side of the ambient light sensor board to the bottom inside edge of the rear 1. housing. Install the rubber bumper between the back of the sensor board and the chassis. 2. Replace the logic board. 3. Replace the spea[...]

iMac G5 (20-inch iSight) T ak e Apart —Camera and IR Cable 11 7 Cable, Camera and IR T ools No tools are required t o remove the camer a cable. Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d IR Board • Display P ane • l Optical Driv • e Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart —Camera and IR Cable 11 8 Removing the Camera and IR Cable Remove the two-headed end of the cable fr om the access hole in the upper EMI F araday 1. shield. Remove the tape that secure s the cable to the rear housing and disconnect the cable from 2. the logic board. Remove the camer a cable.[...]

iMac G5 (20-inch iSight) T ak e Apart —Camera and IR Cable 11 9 Replacing the Camera and IR Cable Insert the t wo-headed end of the camera cable through the acce ss hole in the upper EMI 1. F araday shield. Route the camera cable as shown below . T ape the camera cable to the rear housing . 2. Replace the optical drive , ex drive cable and scr[...]

iMac G5 (20-inch iSight) T ak e Apart —Wireless Antenna 1 20 W ireless Antenna T ools Black stick (or other nonconductive nylon or plastic at-blade tool) • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d Speaker • s AirP or t Extreme/Bluetooth Car • d IR Board • Displ[...]

iMac G5 (20-inch iSight) T ak e Apart —Wireless Antenna 12 1 Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart —Wireless Antenna 12 2 Removing the Wir eless Antenna Cable Carefully peel back the EMI F araday shield and backing from the top right inside corner of 1. the rear housing as shown below . Peel back just enough of the F arada y shield backing to access the ant enna cable. Using a at-blade screwdriv er , pr[...]

iMac G5 (20-inch iSight) T ak e Apart —Wireless Antenna 12 3 Replacing the Wir eless Antenna Cable Attach the antenna boar d to the top inside of the rear housing with double-stick tape . 1. Route the antenna cable along the top inside c orner of the rear housing. Make sure the 2. antenna cable rout es around the white post in the corner . Check [...]

iMac G5 (20-inch iSight) T ak e Apart —Clutch 12 4 Clutch T ools T orx T1 0 screwdriver • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d Speaker • s AirP or t Extreme/Bluetooth Car • d IR Board • Display P ane • l Logic Boar • d CPU F a • n Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart —Clutch 12 5 Removing the Clutch Remove the EMI tape attached along the top and bott om sides of the clutch cov er . After 1. removing the tape , pull the co ver straight o the clutch. P eel back the EMI tape on top of the mechanism. Using a torx T1 0 screwdriv er , remove the 2. four clutch moun ting scre[...]

iMac G5 (20-inch iSight) T ak e Apart —Clutch 1 26 Stand up the unit, to access the clutch-to-stand moun ting screws. 3. Using a T1 0 tor x screwdriver , remove the sev en clutch-to-stand screws. Separate the 4. mechanism and the stand from the rear housing .[...]

iMac G5 (20-inch iSight) T ak e Apart —Clutch 12 7 Replacing the Clutch Make sure the stand is erect and the end of the stand is inser ted through the mounting hole 1. in the rear housing . P osition the clutch on the stand, with the clutch springs at bottom. Install the seven long , 2. clutch-to-stand mounting scr ews. Adjust the clutch so that [...]

iMac G5 (20-inch iSight) T ak e Apart —Chassis 12 8 Chassis T ools T orx T1 0 screwdriver • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d Speaker • s AirP or t Extreme/Bluetooth • c ar d IR board • Display pane • l Optical Driv • e Logic boar • d CPU F a • n AC[...]

iMac G5 (20-inch iSight) T ak e Apart —Chassis 1 29 Part Location Removing the Chassis Using a T1 0 screwdriver , remove 1 2 self-tapping screws from the chassis , and remove the chassis from the rear housing .[...]

iMac G5 (20-inch iSight) T ak e Apart —Chassis 1 30 Replace the Chassis P osition the chassis on the rear housing as shown and install 1 2 self-tapping mounting 1. screws. Replace the clutch mechanism. 2. Replace the AC line lter . 3. Replace the AC/DC pow er supply . 4. Replace the hard drive. 5. Replace the optical drive. 6. Replace the hard[...]

iMac G5 (20-inch iSight) T ak e Apart —Chassis 131 Rear Housing T ools No tools are required t o remove the r ear housing. Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d IR board • Display panel • Speaker • s AirP or t Extreme/Bluetooth • c ar d Optical Driv • e Logic[...]

iMac G5 (20-inch iSight) T ak e Apart —Chassis 13 2 Part Location Removing the Rear Housing Using a T1 0 tor x screwdriver , remove 1 2 self-tapping screws from the chassis , and r emove the chassis from the rear housing . Note : the EMI F araday shield is part of the rear housing.[...]

iMac G5 (20-inch iSight) T ak e Apart —Chassis 13 3 Replace the Rear Housing P osition the chassis on the rear housing as shown and install 1 2 self-tapping mounting 1. screws. Replace the clutch mechanism. 2. Replace the stand. 3. Replace the AC line lter . 4. Replace the AC/DC pow er supply . 5. Replace the hard drive. 6. Replace the optical[...]

iMac G5 (20-inch iSight) T ak e Apart —Stand 1 34 Stand T ools T orx T1 0 screwdriver • Pr eliminary Steps Before you begin, remov e the following: A • ccess door F • ront bezel Low er EMI shiel • d Speaker • s AirP or t Extreme/Bluetooth Car • d IR Board • Display P ane • l Logic Boar • d CPU F a • n Clutc • h Part Location[...]

iMac G5 (20-inch iSight) T ak e Apart —Stand 13 5 Removing the Stand Stand up the unit, to access the clutch-to-stand moun ting screws. 1. Using a T1 0 tor x screwdriver , remove the sev en clutch-to-stand screws . Separate the 2. mechanism and the stand from the rear housing .[...]

iMac G5 (20-inch iSight) T ak e Apart —Stand 13 6 Replacing the Stand Make sure the stand is erect and the end of the stand is inser ted through the mounting hole 1. in the rear housing . P osition the clutch on the stand, with the clutch springs at bottom. Install the seven long , 2. clutch-to-stand mounting scr ews. Adjust the clutch so that it[...]

iMac G5 (20-inch iSight) T ak e Apart —Stand 13 7[...]

 Service Source © 2005 Apple C omputer , Inc. All rights r eserved. T roubleshooting iMac G5 (20-inch, iSight)[...]

iMac G5 (20-inch iSight) Trouble shooting — General Info 13 9 General Information Serial Number Location iMac G5 (iSight) serial numbers are located on the bottom of the computer stand . Accessing the Diagnostic LEDs The iMac G5 (20-inch iSight) has four built-in diagnostic LEDs on the main logic board that can help you troubleshoot the c omputer[...]

iMac G5 (20-inch iSight) Trouble shooting — General Info 1 40 T urn over the unit and place it screen-up , with the bott om facing toward y ou. 4. Tilt up the front bezel and use a T8 torx screwdriver to remo ve the three bezel moun ting 5. screws. Stand up the unit. Using the plastic access card , unhook the bez el locking mechanism in one 6. up[...]

iMac G5 (20-inch iSight) Trouble shooting — General Info 141 Repeat step 6 to release the locking mechanism in the opposite upper corner . 7. 8. Lay the unit screen-up on an ESD mat, with the bottom facing toward y ou. Lift up the top of the bezel and pull it slightly tow ard you to separa te it from the top of the rear housing .[...]

iMac G5 (20-inch iSight) Trouble shooting — General Info 1 42 Lift the front bezel straight up t o remove it. Then swing the bezel upright onto its t op edge 9. so you can disconnect two cables that tether the bez el to the rest of the unit. Caution: Make sure the memory ejec t rings are not protruding from the bezel when y ou lift it or you coul[...]

iMac G5 (20-inch iSight) Trouble shooting — General Info 1 43 T o protect the computer from electrostatic dischar ge, ground yourself by touching the metal 11 . frame around the displa y panel. Caution: Always dischar ge static electricit y before you t ouch any parts or install any components inside the computer . Carefully peel the low er EMI s[...]

iMac G5 (20-inch iSight) Trouble shooting — General Info 14 4 The four labelled diagnostic LEDs shown belo w . 1 4. LED 1: • Indicates that trickle voltage from the AC po wer inlet to the pow er supply has been detected. This LED will be ON when the computer is turned o and your pow er supply is working correctly . LED 2: • Indicates that [...]

iMac G5 (20-inch iSight) Trouble shooting — General Info 1 45 T esting Under Power Using the diagnostic LEDs to check for po wer issues requir es powering on the system with the diagnostic LEDs visible. T o access the Diagnostic LEDs, follow the prec eding steps under “ Accessing the Diagnostics LEDs.” Never r emov e components not included i[...]

iMac G5 (20-inch iSight) Trouble shooting — General Info 1 46 SMU (System Management Unit) The iMac G5 (iSight) uses an advanced system managemen t unit (SMU) to manage the thermal and wattage conditions , while k eeping the acoustic noise to a minimum. The SMU controls the fans and regulates the s peeds to run each fan. The SMU supports the foll[...]

iMac G5 (20-inch iSight) Trouble shooting — General Info 14 7 Ports The iMac G5 (20-inch iSight) ports are shown below . DDR Memory iMac G5 (20-inch iSight) computers work with memory modules (DIMMs) that meet all of these criteria: PC3 200, 2.5V , unbu ered, 8-byte , nonparity , 1 84-pin, 53 3Mhz DDR2 SDRAM. iMac G5 (20-inch iSight) comes wit[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 14 8 Symptom Charts How to Use the Symptom Charts The Symptom Charts included in this chapter will help you diagnose specic sympt oms related to the product. Because cures are listed on the charts in the order of most likely solution, tr y the cures in the order pre sented . V erify wh[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 1 49 Power Issues No Power . The iMac G5 will not turn on. The displa y has no pic ture or color and no sounds can be heard coming from the fan or hard drive . V erify p ower outlet is good . Plug a di erent device into the socket to ensure there is po wer , 1. or plug the iMac G5 into[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 1 50 Plug the power cor d into the iMac G5 and into the AC outlet. Check to see if diagnostic LED 7. #1 is On or O . LED #1 is On: This indicates that the A C power inlet and AC-t o-DC power supply is getting good power from the A C outlet, and the DC-t o-DC board is receiving 1 2VDC. [...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 15 1 T urn the computer on by pressing the pow er button on the rear of the case. Go to the next 8. step . Does the computer start up normally af ter pressing the pow er button? 9. Y es: Pr ess and hold the power button un til the computer powers o . Unplug the power cor d from the iMa[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 15 2 Audible buzzing, whining, or ticking noise The iMac G5 (iSight) contains several mechanical device s such as motors and fans that may make audible buzzing , ticking, or whining noises when they are operating in a normal manner . The sounds will vary depending on how the system is use[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 15 3 No V ideo The computer will turn on, but the display has no picture or color . The boot chime, the fan, and hard drive activity can be heard. Check if the computer is sleeping . P ress the space bar to wake the computer fr om sleep 1. mode. Did the computer wake from sleep? 2. Y es: [...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 1 54 T urn on the computer by pressing the pow er button. 8. When the computer starts up, LED 2 will light, indicating the power supply is functioning 9 . properly . If LED 2 do es not light, refer to the “No P ower ” troubleshooting earlier in this chapter . LED 3 will light last, in[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 15 5 Display is tinted another color . Reset the parameter RAM. Pre ss the Command-Option-P-R keys. When you keep all the keys 1. held down, you will hear the star tup chime over and ov er again (about ever y ten seconds) until you let go . After you hear the second chime , y ou can let g[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 1 56 Display When displa ying a single color over the scr een area, the L CD panel shows one or mor e pixels that are not properly lit Active-matrix L CD technology uses rows and columns of addr essable locations (pixels) tha t render text and images on screen. Each pixel location has thr[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 15 7 Hard Drive Flashing question mark, or an alternating question mark and Mac OS (face or a folder) Note: When troubleshooting hard driv e problems it is a good idea, if possible, to back up any impor tant data. Some troubleshooting steps may r equire erasing the cont ents of the hard d[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 15 8 Optical Drive CDs or DVDs don’t show up on the Desktop. Select Prefer ences from the F inder menu and mak e sure the option to show CDs , DVDs and 1. iP ods is check ed: in the General window as shown below .[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 15 9 Select System Pref erences from the Apple menu and open the CDs & DVDs prefer ences 2. window . M ake sure that audio CDs are set to la unch iT unes and movie DVDs set to launch DVD Player when those media are inserted , as shown below . Check that the drive can read discs normal[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 1 60 The computer won’t burn discs. Check whether the drive can read CDs and DVDs normally . Perform the steps above f or “CDs 1. or DVDs don ’t show up on the Desktop .” T r y a test burn by creating a Burn F older , as f ollows. 2. • In the Finder , choose “New Burn Folder?[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 1 61 No: Replace the optical drive. Does it burn correctly now? Y es: Pr oblem solved. No: Replace the logic board . Discs won’t insert. Is there a disc already in the drive? 1. Y es: Eject the disc before inserting another . Refer to Knowledge Base ar ticle 1 0675 2, “Macintosh: How [...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 1 62 Optical disc constantly ejects Disconnect all peripheral devices, especially the mouse in cases wher e the disc is constantly 1. ejecting. Retest. If the issue is resolved , reconnect peripherals one-at-a-time until faulty peripheral is identied . T r y cleaning the disc. If the d[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 16 3 Fan Sound Loud fan noise coming from inside the computer The iMac G5 (20-inch iSight) has a trio of fans that circulate air throughout the sy stem. I t also includes temperatur e sensors, and advanced thermal software that spins the fans fast or slow as needed. As the system usage in[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 16 4 No: If the fan activit y does not coincide with CPU usage, the sound you ’r e hearing may not be fan activit y . G o to the Next Step . The normal functioning of the hard drive and optical drive will generate additional whirring 4. and scratching noises that ma y be audible. W e ca[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 1 65 Fans are running at a constant high speed If the fans on the system are running at a constan t high speed , or ramp v er y quickly to high speed and do not vary once this speed is reached , the fans ar e most likely receiving incorrect thermal input. Follow these st eps: Reset the SM[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 1 66 AirPort/Bluetooth Not able to connect wirelessly with AirPort or Bluetooth F rom the Apple menu, choose About this Mac. 1. Click on More Info . System P roler should open. 2. In System P roler , in the column on the left, look under Hardware for a line called “ AirPort 3. Car[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 16 7 AirPort signal seems to be very weak Check the antenna. If the antenna is not plugged in all the way t o the AirPort/Bluetooth 1. combo card , AirP ort range may be ver y shor t. Remove the fron t bezel, lower EMI shield , right speaker , and the combo card mounting screw . Disconnec[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 1 68 IR Remote Remote won ’t communicate with system applica tions such as iT unes or iPhoto, or with the optical drive. Make sure of the following when using the Apple Remote: Y ou are within 3 0 feet of the front of the computer . • Y ou hav e an unobstruc ted line-of-sight to the f[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 16 9 IR Sensor/Receiver Supported applications do not respond to input from the remote control. P er form the checks above under “IR Remote ” to verify that the Apple Remot e is functioning 1. correctly , and retest. Do suppor ted applications now respond to input fr om the IR remote?[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 1 70 Built-in iSight Camera The built-in camera is not recognized. Boot the iM ac G5 to the desktop and la unch iChat A V . 1. Note : Y ou do not need to be connected to a network to use iChat A V to troubleshoot. V er ify that the correct versions of Mac OS X and iChat A V are installed [...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 17 1 iChat A V connection doctor featur e to verify that there is sucien t bandwidth to have a video iChat session without a signicant degrada tion of image quality . No: The camera may not be functioning normally . Replace the camera board in the front bezel and rete st. Camera rec[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 17 2 Speakers Can’t hear sound from the speakers. Disconnect any external microphones, speakers, or headphones. 1. Access S ystem P referenc es and select Sound. In the Sound pane, select Output and mak e 2. sure the Internal s peakers are selected as the device for sound output, the Ou[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 17 3 Mouse My mouse doesn’t work at all. T r y using the mouse on another sur face. Non-reective, opaque sur faces without repetitive 1. patterns work best. The sur face should be clean, but not shiny . Unplug any USB device s plugged into your comput er , other than the Apple Mouse [...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 17 4 Keyboard None of the keys on my keyboard work. Unplug all devices from y our computer , including your mouse and keyboard as well as 1. printer , scanner , ex ternal hard drives , and hubs. ( Warning: Some devices may require you to perform steps before it is safe to unplug them, e.g[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 17 5 occupied. Go on to step 4. Does your mouse work now? 4. Y es: Replace the keyboard. No: Replace the logic board. My keys are sticky or slow to respond. T r y a k nown good keyboard. 1. Open System P references. Click on the keyboard and mouse icon. Adjust the “k ey repeat 2. speed [...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 17 6 Err or Beep(s) Computer beeps at startup. Check that the memory DIMMs are i Mac G5 (20-inch iSight) compliant. iMac G5 (20-inch 1. iSight) computers work with memory modules (DIMMs) that meet all of these criteria: • • DDR2 SDRAM (Double Data Rate 2, Synchronous D ynamic Random A[...]

iMac G5 (20-inch iSight) Trouble shooting — Symptom Charts 17 7 USB A USB device doesn’ t work Please unplug all of your USB device s from your iMac except your A pple Keyboard and Apple 1. mouse. Now plug your device dir ectly into the back of your iMac. Does it work as expected now? 2. Y es: Y our device works when plugged directly into the c[...]

 Service Source © 2005 Apple C omputer , Inc. All rights r eserved. V iews iMac G5 (20-inch, iSight)[...]

iMac G5 (20-inch iSight) — Views 17 9 iMac G5 (20-inch iSight)—Upper Exploded V iew F ront Bezel, 20” 922-6998 Camera Board 661-3782 Camera Board/IR Cable 922-6994 Brack et, LCD , Right 922-7004 Display P anel, LCD 661-3779 Brack et,LCD , Left 922-7005 Shield, EMI, Lower LCD (not shown) 922-7137 TMDS Ca bl e 922-6986 Optical Bezel 922-6997 Op[...]

iMac G5 (20-inch iSight) — Views 1 80 iMac G5 (20-inch iSight)—Lower Exploded V iew Fa n, Optical Drive 922-6991 Po wer Supply AC /DC 661-3780 Po wer Supply , DC/DC , In ve r ter 661-3781 Co ve r, Stand Mechanism 922-7007 Rear Housing 922-6999 SDRAM 661-3783 512 MB, 533 661-3784 1 GB, 533 661-3785 2 GB, 533 Not Shown: Modem, External 661-3797 B[...]

iMac G5 (iSight 20-inch) Views 18 1 Screw Chart iMac (iSight 20-inch) Scr ews page 1 Note: Screws are not to scale. 92 2-6800 T1 0 - AC lter t o rear cover - Inv er ter to rear co ver - Logic board to r ear cover 92 2-6850 T1 0 - Chassis to rear co ver - Inv er ter to rear co ver 92 2-68 42 T1 0 - DC board to rear co ver - Logic board t o chassi[...]

iMac G5 (iSight 20-inch) Views 18 2 92 2-700 1 T8, r ound head Hard drive pins (2) 92 2-7009 C-Clip for the access door Access door C-Clip 92 2-7023 T1 0 L CD assembly to rear cover 92 2-7069 T1 0 A/C to chassis 92 2-7 1 59 T1 0 P ower supply to chassis 92 2-70 1 9 T8 Hard drive clip to hard driv e 92 2-70 1 4 T1 0 Left speaker , 20-inch 92 2-70 1 [...]

iMac G5 (iSight 20-inch) Views 18 3 92 2-7 1 62 T6 Optical drive ex board to logic board 92 2-7066 T1 0 P ower supply to rear cov er[...]