Apple imac 20 inch late 2006 User Manual
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iMac (20-inch Late 2006) Take Apart — General Information 11 Opening the Computer Apple authorized, desktop certified technicians only should ever remove the front bezel on the iMac (20-inch Late 2006). When the front bezel is removed, be sure to always ground yourself and follow ESD-safe repair practices Removing the front bezel requires using a special access card (part 922-7172) to release latches located inside the upper corners of the front bezel. Slightly bending the upper quarter of the access tool card will help engage the latch more securely. As you are inserting the card to disengage the latch you should squeeze the top of the bezel, that will help take pressure off of the latch and enable it to open easier. Note: If the bezel won’t open, try cutting the card lengthwise into 3/4 inch or 1.5 cm strips. Insert the card on a 45º angle, aimed toward the outer corner, and try again. Once the card has been released it is safe to open the bezel. See the Front Bezel Take Apart procedure for more information. Access Tool Modification If you wish to modify the access card tool, order kit 076-1213. The kit contains an access card and a piece of EMI gasket that can be cut and added to the top of the card. The additional thickness on the card will improve the chances of making contact with each bezel latch. Remove the tape on the gasket to expose the sticky side of the gasket. Attach the sticky side 1. of the EMI gasket to the top of the access card.
iMac (20-inch Late 2006) Take Apart — General Information 12 Cut the EMI gasket to the edge of the access card. 2. Using packing tape, or something equivalent, fold the tape over the EMI gasket to attach the 3. gasket to the card.
iMac (20-inch Late 2006) Take Apart — General Information 13 Bend the card at a slight angle at the top to make sure the card makes contact with each 4. latch. Refer to 5. Removing the Front Bezel for the complete procedure. 6.
iMac (20-inch Late 2006) Take Apart — General Information 14 EMI Shielding The iMac enclosure is wrapped in EMI shielding that is easily torn and damaged. To maintain a properly shielded unit, you must repair all accidental tears and cracks to the shielding by covering them with EMI tape. Order EMI tape, part number 922-4786 (a long, thin strip) or 922- 5026 (short, wide strips). Cover nicks with EMI tape. Pay particular attention to the EMI shielding inside the rear housing, shown below. The EMI shield is easily damaged when replacing modules. •
iMac (20-inch Late 2006) Take Apart — General Information 15 Lower EMI Shield EMI tape covers the top and sides of the display panel, and the lower EMI shield covers the logic board along the bottom of the unit. The EMI tape and lower EMI shield are easily damaged when removed, and removal is necessary in order to access most components within the unit. Should the EMI tape that seals the display, or the EMI shield covering the bottom of the enclosure (see photo below) accidentally tear, use the EMI tape (922-4786 or 922-5026) to repair and completely seal the unit.
iMac (20-inch Late 2006) Take Apart — General Information 16 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 flatten the EMI tape tightly and rub out air pockets and wrinkles.
iMac (20-inch Late 2006) — What’s New 17 What’s New 13 December 2007 Troubleshooting---> No Video--> Symptom 2: No Video, Boot Chime Heard, White LED ON: Step 4 was corrected to reference Step 7 instead of Step 8, which does not exist. 29 October 2007 A note was added to the Logic Board Replacement section to tell service providers to install the iMac Firmware Update 1.2 (or later).For proper performance and reliability of the Intel Core 2 Duo processors, apply the iMac • firmware update after replacing the logic board. The firmware update allows Apple service to consolidate the version 1 and version 2 logic boards.Refer to KBase article: Firmware updates for Intel-based Macs . The 661-4108 logic board will replaced by 661-4294 • The 661-4109 logic board will replaced by 661-4295 • The 661-4110 logic board will replaced by 661-4296 • The 661-4111 logic board will replaced by 661-4297 • 16 October 2007 Corrected the Ambient Light Sensor part number on the Exploded View. diagram The correct • part number is 922-7759. 23 April 2007 The • optical drive removal procedur e has been updated. Using a screwdriver to release the optical drive tabs is causing damage to the logic board. The updated procedure shows how to remove the optical drive using a needlenose pliers. Additional information on handling slot-load optical drives can be referenced in • Kbase article 305282. 22 February 2007 Updated Upper Exploded View and created hyperlink to EEE code compatiblilty chart. • 16 February 2007 The AirPort Extreme Card and Logic Board sections in Take Apart have been updated with • EEE code compatibility information. Before replacing either part, check for compatibility.
iMac (20-inch Late 2006) — What’s New 18 12 January 2007 The “ • No Power” symptom in Troubleshooting has been updated. If your computer won’t turn on, try removing and reinstalling the SO-DIMMs. 4 December 2006 Troubleshooting has been updated with a new symptom, “ • Display does not remain in its intended position when tilted.” 11 November 2006 A drawing of the clutch mechanism (922-7002) was added to the Exploded View drawing. • 31 October 2006 Troubleshooting has been updated with a new symptom, “ • Fans running at full speed after computer turns on.” Note: The customer may have entered a diagnostic mode that causes the fans to run at full speed. This symptom is very easy to resolve at the customer level. 29 September 2006 The inverter procedure was updated; the DC cable connection to the inverter changed. • Photos of the EMI tape (922-44786 and 922-5026), used to repair torn and damaged EMI • shielding, have been added to the EMI Shielding section in the General Information chapter 6 September 2006 Product Introduction: iMac (20-inch Late 2006) • Logic board: Intel Core 2 Duo processor running at 2.16 or 2.33 GHz • AirPort Extreme and Bluetooth antennas: Two AirPort antennas, one Bluetooth antenna • Inverter Board : New service part, 661-4112. It serves as the flat panel backlight controller. • Camera Board: New service module, 661-4113, is smaller than previous camera boards. • Memory: Accepts up to a 2 GB SO-DIMM in each of the two memory slots, but the iMac • will only support 3 GB total memory Rear cover and front bezel: New part numbers (922-7769 and 922-7875) with slight • revisions to each part DC-DC Board: There is no DC/DC board. The functionality previously accomplished on • the DC/DC board has been integrated into the logic board
iMac (Early 2006 20-inch) Take Apart — Access Door 19 Access Door Tools Phillips #2 screwdriver • ESD-safe workstation and mat • Soft , clean towel or cloth • Preliminary Steps Before you begin, lay the computer down so the panel is face down and the bottom is facing you. Part Location
iMac (Early 2006 20-inch) Take Apart — Access Door 20 Removing the Access Door Raise the stand and use a Phillips #2 screwdriver, to loosen the two captive access door 1. screws. Warning: The ambient light sensor is located to the left. Don’t mistake the ambient light sensor for a screw. Sticking a screw driver or other sharp object in the ambient light sensor could damage the computer. Remove the access door. 2. Replacing the Access Door Position the access door on the rear housing over the memory compartment. 1. Lift the stand out of the way. 2. Use a Phillips #2 screwdriver to tighten the captive screws. 3.