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  1. 将iMac面朝下放在柔软,干净的表面上,如图所示。 确保工作表面没有任何污垢或碎屑,因为它可能会划伤iMac正面的玻璃面板。我们建议在iMac和工作台面之间放一条毛巾。
    • 将iMac面朝下放在柔软,干净的表面上,如图所示。

    • 确保工作表面没有任何污垢或碎屑,因为它可能会划伤iMac正面的玻璃面板。我们建议在iMac和工作台面之间放一条毛巾。

    • 拧松将维修孔盖固定到iMac底部边缘的三颗十字螺钉。

    • 所有三个螺钉都将保持在维修孔盖中。

    • 取下维修孔盖。

  2. 轻轻地将黑色塑料记忆体拉片从记忆体插槽中滑出。 将黑色塑料卡舌从iMac的底部边缘拉出,以弹出记忆体托架另一侧的模块。 这可能需要一点力。
    • 轻轻地将黑色塑料记忆体拉片从记忆体插槽中滑出。

    • 将黑色塑料卡舌从iMac的底部边缘拉出,以弹出记忆体托架另一侧的模块。

    • 这可能需要一点力。

  3. 这个步骤还没有翻译 帮忙翻译一下

    Slide the old RAM module(s) out of their slots in the RAM bay and set them aside.
    • Slide the old RAM module(s) out of their slots in the RAM bay and set them aside.

  4. 这个步骤还没有翻译 帮忙翻译一下

    Repeat the process in the previous steps to remove the RAM module(s) from the other side of the RAM bay. Repeat the process in the previous steps to remove the RAM module(s) from the other side of the RAM bay. Repeat the process in the previous steps to remove the RAM module(s) from the other side of the RAM bay.
    • Repeat the process in the previous steps to remove the RAM module(s) from the other side of the RAM bay.

  5. 这个步骤还没有翻译 帮忙翻译一下

    When installing new RAM modules, it is important to orient them correctly. Be sure the small notch cut into each RAM module (shown in the first picture) mates with the protrusion in each RAM slot (shown in the second picture). Your iMac has four RAM slots. Be sure to slide each RAM module into its slot horizontally. This will prevent getting the modules stuck between two of the adjacent slots.
    • When installing new RAM modules, it is important to orient them correctly.

    • Be sure the small notch cut into each RAM module (shown in the first picture) mates with the protrusion in each RAM slot (shown in the second picture).

    • Your iMac has four RAM slots. Be sure to slide each RAM module into its slot horizontally. This will prevent getting the modules stuck between two of the adjacent slots.

    • Once you have oriented the new RAM modules correctly, gently slide them completely into the iMac and use your thumbs to firmly seat them in their sockets.

    • 在开始之前,将您的iMac如图所示放倒在柔软的表面上。

    • 在玻璃面板顶部的两个角上放置吸盘。

    • 要使用我们的吸盘时,首先将吸盘的活动手柄扳动到与玻璃面板平行位置。 在吸盘轻轻地吸在玻璃面板上时,扳动活动手柄使其与另外一个手柄平行。

    • 如果您的吸盘无法吸住,尝试使用温和溶剂清洁玻璃面板和吸盘。

  6. 轻轻地竖直提起玻璃面板到足够高的高度来接触玻璃面板顶部下的卡扣。 将玻璃面板拉离iMac的下部,并将面板放在一边。
    • 轻轻地竖直提起玻璃面板到足够高的高度来接触玻璃面板顶部下的卡扣。

    • 将玻璃面板拉离iMac的下部,并将面板放在一边。

    • 在重新组装时,请确保已经清理了玻璃面板内部,和LCD表面。当打开电脑时,没人希望看到屏幕里面满是 灰尘和指纹,这样你会抓狂的。

  7. 取下8颗将显示屏与外壳固定的8mm T8梅花螺丝。 最后两张图片为显示屏每侧的细节图片。 最后两张图片为显示屏每侧的细节图片。
    • 取下8颗将显示屏与外壳固定的8mm T8梅花螺丝。

    • 最后两张图片为显示屏每侧的细节图片。

  8. 稍微将显示屏从外壳中提出。
    • 稍微将显示屏从外壳中提出。

    • 切勿提出太多。 还有许多线缆将显示屏与逻辑板相连。

  9. 将垂直同步电缆连接器从iMac左上角附近的LED驱动板上的插座中拔出。 将垂直同步电缆连接器从iMac左上角附近的LED驱动板上的插座中拔出。
    • 将垂直同步电缆连接器从iMac左上角附近的LED驱动板上的插座中拔出。

  10. 将显示器从外壳上旋转到足以将LED背光电源电缆从LED驱动板上断开。 将连接器从插槽(朝向iMac的底部边缘)拉出,同时按下锁定机构,断开LED背光电源电缆。
    • 将显示器从外壳上旋转到足以将LED背光电源电缆从LED驱动板上断开。

    • 将连接器从插槽(朝向iMac的底部边缘)拉出,同时按下锁定机构,断开LED背光电源电缆。

  11. 显示数据线插头有一个线锁。 旋转塑料片使其朝上,使插头的锁脱开。 (不是拉那个标签。) 将显示数据线直接从逻辑板上的插座中拔出。
    • 显示数据线插头有一个线锁。 旋转塑料片使其朝上,使插头的锁脱开。 (不是拉那个标签。)

    • 将显示数据线直接从逻辑板上的插座中拔出。

    • 请勿抬起显示器的数据线,因为其插口非常脆弱。 将电缆平行于逻辑板的表面拉。

  12. 断开LCD热传感器电缆连接器与逻辑板上的插座的连接。 如果您的风扇在完成后全速旋转,请检查此连接或硬盘驱动器的热传感器电缆。
    • 断开LCD热传感器电缆连接器与逻辑板上的插座的连接。

    • 如果您的风扇在完成后全速旋转,请检查此连接或硬盘驱动器的热传感器电缆。

  13. 小心地将显示器拉向iMac的顶部边缘,然后将其从外壳中取出,注意可能被卡住的任何电缆。
    • 小心地将显示器拉向iMac的顶部边缘,然后将其从外壳中取出,注意可能被卡住的任何电缆。

  14. 这个步骤还没有翻译 帮忙翻译一下

    Remove the following four screws:
    • Remove the following four screws:

    • One 9.3 mm T10 Torx screw with a large head

    • Three 9.3 mm T10 Torx screws with a normal sized head

  15. 这个步骤还没有翻译 帮忙翻译一下

    Pull the optical drive thermal sensor connector toward the top edge of the iMac to disconnect it from its socket on the logic board. Pull the optical drive thermal sensor connector toward the top edge of the iMac to disconnect it from its socket on the logic board.
    • Pull the optical drive thermal sensor connector toward the top edge of the iMac to disconnect it from its socket on the logic board.

  16. 这个步骤还没有翻译 帮忙翻译一下

    Lift the inner edge of the optical drive and maneuver its connector past the GPU frame attached to the logic board. Carefully pull the optical drive off its mounting pins on the right side of the outer case to gain clearance for disconnecting the optical drive cable.
    • Lift the inner edge of the optical drive and maneuver its connector past the GPU frame attached to the logic board.

    • Carefully pull the optical drive off its mounting pins on the right side of the outer case to gain clearance for disconnecting the optical drive cable.

    • Allow the optical drive to hang down as you de-route the optical drive thermal sensor connector from behind the GPU heat sink.

  17. 这个步骤还没有翻译 帮忙翻译一下

    Disconnect the optical drive cable by pulling its connector away from the optical drive.
    • Disconnect the optical drive cable by pulling its connector away from the optical drive.

    • Remove the optical drive from the iMac.

    • Do not forget to also move the thermal sensor from the optical drive to the enclosure when you install the second hard drive.

  18. 这个步骤还没有翻译 帮忙翻译一下

    Remove the single 13 mm T10 Torx screw securing the optical drive fan to the outer case.
    • Remove the single 13 mm T10 Torx screw securing the optical drive fan to the outer case.

  19. 这个步骤还没有翻译 帮忙翻译一下

    Pull the optical drive fan off the pins attached to the outer case.
    • Pull the optical drive fan off the pins attached to the outer case.

  20. 这个步骤还没有翻译 帮忙翻译一下

    Pull the optical drive fan connector out of its socket on the logic board.
    • Pull the optical drive fan connector out of its socket on the logic board.

    • Remove the optical drive fan from the iMac.

  21. 这个步骤还没有翻译 帮忙翻译一下

    In the proceeding steps, you will disconnect the following cables:
    • In the proceeding steps, you will disconnect the following cables:

    • SD Board and microphone

    • Left/Right Speaker

    • Wi-Fi Antenna

    • Bluetooth/Ambient Light Sensor/Camera/Left Temperature Sensor, Hard Drive Temperature Sensor and Hard Drive Fan

    • CPU Fan/Ambient Temperature and Power Button

    • IR Sensor

  22. 这个步骤还没有翻译 帮忙翻译一下

    Pull the microphone cable connector toward the top edge of the iMac to disconnect it from the logic board.
    • Pull the microphone cable connector toward the top edge of the iMac to disconnect it from the logic board.

  23. 这个步骤还没有翻译 帮忙翻译一下

    Pull the SD board cable out of its socket on the logic board.
    • Pull the SD board cable out of its socket on the logic board.

  24. 这个步骤还没有翻译 帮忙翻译一下

    Disconnect the left speaker and right speaker cables by pulling their connectors toward the right side of the iMac. Disconnect the left speaker and right speaker cables by pulling their connectors toward the right side of the iMac.
    • Disconnect the left speaker and right speaker cables by pulling their connectors toward the right side of the iMac.

  25. 这个步骤还没有翻译 帮忙翻译一下

    Use the flat end of a spudger to pry both AirPort antenna connectors up from their sockets on the AirPort board. The gray antenna attaches to the socket on the left and the black antenna attaches to the socket on the right.
    • Use the flat end of a spudger to pry both AirPort antenna connectors up from their sockets on the AirPort board.

    • The gray antenna attaches to the socket on the left and the black antenna attaches to the socket on the right.

  26. 这个步骤还没有翻译 帮忙翻译一下

    Disconnect the hard drive fan by pulling its connector toward the top edge of the iMac.
    • Disconnect the hard drive fan by pulling its connector toward the top edge of the iMac.

  27. 这个步骤还没有翻译 帮忙翻译一下

    Pull the hard drive thermal sensor cable out of its socket and toward the top edge of the iMac to disconnect it from the logic board.
    • Pull the hard drive thermal sensor cable out of its socket and toward the top edge of the iMac to disconnect it from the logic board.

  28. 这个步骤还没有翻译 帮忙翻译一下

    Use your thumbnails on both sides of the Bluetooth/ambient light sensor/camera/left temperature connector to push it toward the top edge of the iMac and out of its socket on the logic board.
    • Use your thumbnails on both sides of the Bluetooth/ambient light sensor/camera/left temperature connector to push it toward the top edge of the iMac and out of its socket on the logic board.

  29. 这个步骤还没有翻译 帮忙翻译一下

    Pull the CPU fan/ambient temperature sensor connector toward the bottom left edge of the iMac and out of its socket on the logic board. Pull the power button connector toward the bottom left corner of the iMac to disconnect it from its socket on the logic board. Pull the power button connector toward the bottom left corner of the iMac to disconnect it from its socket on the logic board.
    • Pull the CPU fan/ambient temperature sensor connector toward the bottom left edge of the iMac and out of its socket on the logic board.

    • Pull the power button connector toward the bottom left corner of the iMac to disconnect it from its socket on the logic board.

  30. 这个步骤还没有翻译 帮忙翻译一下

    Remove the piece of tape covering the IR sensor cable.
    • Remove the piece of tape covering the IR sensor cable.

  31. 这个步骤还没有翻译 帮忙翻译一下

    Use your thumbs to push the IR sensor connector out of its socket and toward the top edge of the iMac.
    • Use your thumbs to push the IR sensor connector out of its socket and toward the top edge of the iMac.

  32. 这个步骤还没有翻译 帮忙翻译一下

    Pull the IR sensor board up from behind the front face of the outer case.
    • Pull the IR sensor board up from behind the front face of the outer case.

    • Remove the IR sensor and set it aside.

  33. 这个步骤还没有翻译 帮忙翻译一下

    Remove the following seven screws:
    • Remove the following seven screws:

    • Two 7 mm T10 torx screws

    • One 30 mm T10 Torx screw

    • Two 25 mm T10 Torx screws

    • Two 21 mm T10 Torx screws

  34. 这个步骤还没有翻译 帮忙翻译一下

    Be careful not to touch any solder joints on the back of the power supply. Capacitors may be charged enough to give you a dangerous shock. Remove the following four screws:
    • Be careful not to touch any solder joints on the back of the power supply. Capacitors may be charged enough to give you a dangerous shock.

    • Remove the following four screws:

    • One 9.3 mm T10 coarse-threaded screw

    • One 25 mm T10 coarse-threaded screw

    • Two 22 mm fine-threaded screws

    • Pull the upper right and lower left corners of the power supply away from the rear case to dislodge the mounting posts attached to the power supply's corners.

  35. 这个步骤还没有翻译 帮忙翻译一下

    Carefully lift the power supply out of the outer case and rotate it to expose the cable lock as shown, minding the DC-out and AC-in cables still attaching it to the iMac. Disconnect the DC-out cable by depressing the locking mechanism on the connector while you pull the connector away from its socket on the power supply.
    • Carefully lift the power supply out of the outer case and rotate it to expose the cable lock as shown, minding the DC-out and AC-in cables still attaching it to the iMac.

    • Disconnect the DC-out cable by depressing the locking mechanism on the connector while you pull the connector away from its socket on the power supply.

    • Once the locking mechanism has cleared the socket, pull the DC-in connector away from the power supply.

  36. 这个步骤还没有翻译 帮忙翻译一下

    Disconnect the AC-In cable by depressing the locking mechanism while pulling the connector away from its socket.
    • Disconnect the AC-In cable by depressing the locking mechanism while pulling the connector away from its socket.

    • Remove the power supply from the outer case.

  37. 这个步骤还没有翻译 帮忙翻译一下

    Remove the plastic wall that is installed directly to the right of the LED driver board.
    • Remove the plastic wall that is installed directly to the right of the LED driver board.

  38. 这个步骤还没有翻译 帮忙翻译一下

    Remove the plastic pressure wall installed next to the hard drive.
    • Remove the plastic pressure wall installed next to the hard drive.

  39. 这个步骤还没有翻译 帮忙翻译一下

    Slightly pull the logic board away from the back of the outer case, then lift it upward to clear the lower front face of the outer case. Slightly pull the logic board away from the back of the outer case, then lift it upward to clear the lower front face of the outer case.
    • Slightly pull the logic board away from the back of the outer case, then lift it upward to clear the lower front face of the outer case.

  40. 这个步骤还没有翻译 帮忙翻译一下

    Disconnect the audio port cable by pulling its connector away from the front face of the logic board.
    • Disconnect the audio port cable by pulling its connector away from the front face of the logic board.

  41. 这个步骤还没有翻译 帮忙翻译一下

    If present, peel off the tape securing the hard drive SATA cable to the logic board.
    • If present, peel off the tape securing the hard drive SATA cable to the logic board.

  42. 这个步骤还没有翻译 帮忙翻译一下

    Depress the locking mechanism and carefully pull the DC-In cable out of its socket on the back of the logic board. Depress the locking mechanism and carefully pull the DC-In cable out of its socket on the back of the logic board.
    • Depress the locking mechanism and carefully pull the DC-In cable out of its socket on the back of the logic board.

  43. 这个步骤还没有翻译 帮忙翻译一下

    Being careful not to damage the socket on the logic board, gently pull the hard drive SATA data cable straight out of its socket on the logic board.
    • Being careful not to damage the socket on the logic board, gently pull the hard drive SATA data cable straight out of its socket on the logic board.

    • Remove the logic board, minding any cables that may get caught.

    • When reinstalling the logic board, plug in a mini display port cable and a USB cable into the outer USB port before tightening the logic board screws to ensure proper alignment.

终点

36等其他人完成本指南。

Can you recommend a supplier for a logic board

Jay - 回复

I reccomend one from here at iFixit, of course!

Aaron Cooke -

Hi. I replaced the logic board and when I started to put it back together there was a half round cable that I have no clue where it goes. I really hope you can help me. Also the DVD drive was replaced cause it didn't work. It plays but it won't eject the DVD. It only ejects when it's tilted.

Lucy Rahiotis - 回复

Yuuuuuuuuuuuuuupiiiiiiiiiii :) great guide

John Grace - 回复

can we use logic board from imac 21.5 late 2012 to replace the one in imac 21.5 mid 2010? or even more put all internal thing from imac 21.5 late 2012 into imac 21.5 mid 2010 aluminium case?

Ball Raider - 回复

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