필요한 것
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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Well this exterior certainly isn't giving much away, but you can't always judge a book by the aluminum-and-glass shell of the iMac that you're reading it on. Let's start with what we know:
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3.0 GHz quad-core Intel Core i5 (Turbo Boost up to 3.5 GHz)
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8 GB of 2400 MHz DDR4 memory
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Radeon Pro 555 GPU with 2 GB of VRAM
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1 TB (5400-rpm) hard drive
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802.11ac Wi-Fi and Bluetooth 4.2
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43% brighter display (500 nits) with 4096 × 2304 resolution and P3 wide color gamut
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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A peek at the back reveals a bevy of ports. First, the usual suspects: a headphone jack, SD card reader, four USB ports, and an ethernet jack.
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The un-usual suspects? This iMac's sporting two Thunderbolt 3 ports. These support double the bandwidth of the previous generation—each of these ports can push data at 40 Gbps.
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That's enough throughput to drive four 4K external monitors—although with this hardware configuration, Apple says we're limited to two.
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How are we supposed to get by with a total of just three 4K displays? How?
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Confirming our suspicion that this is mostly a 2015 iMac with a facelift, this unit sports the same model number (A1418), but with a new EMC: 3069.
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
이 단계에 사용된 도구:iMac Opening Wheel$7.99-
We grab our
pizza cutteriMac Opening Wheel and go to town. Then, we bring it back home and use it to split open our fancy new iMac. -
'Round and 'round we go, and the adhesive securing the display perimeter goes kaput.
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When Apple introduced this form factor in 2012, replacing the much-loved magnets, we were sad and confused. Since then we've learned its secrets, and now we're on board with how easy this adhesive is to slice through.
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After a familiar opening procedure, we get our first peek inside.
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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With all the glass and pixels out of the way, we immediately pick out some subtle updates.
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First, the logic board has grown—encroaching on territory formerly held down by the right speaker, and even expanding towards the fan a bit.
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Lastly, near the center of the bottom display bezel, just beneath the glass, there's a microphone! Whose ribbon cable routes right over the top of a screw, which is pretty weird.
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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Well, this part of the refresh is less refreshing than we'd like—the right speaker is no longer immediately removable. It's trapped pretty solidly by the new logic board contours.
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No big deal; it just means your favorite set of iMac repair guides won't fully apply to this model. We'll get to work on that for you.
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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The rest of this iMac comes apart pretty much the way we expect, and we dispense with the power supply, hard drive, and fan without fuss.
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And with a bit more elbow grease, we shimmy the logic board out of its slot to reveal ... removable RAM? We can hardly believe our eyes.
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Yep, those are SO-DIMMs. Two of them.
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Slightly less excitingly, there's also an exciting split heat sink. But seriously, look at that RAM!
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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It may not be as accessible as the (dead simple) RAM hatch found in the 27" iMacs—but still, this is a major win for upgradability over all the 21.5" iMacs with soldered RAM that we've encountered in recent years.
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Before moving on, we take a moment to scope out the silicon these memory modules have to offer:
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SK Hynix H5AN8G6NAFR-UHC 8 Gb DDR4 SDRAM (4 × 8 Gb = 4 GB per DIMM, 8 GB total)
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Ablic (formerly Seiko Instruments) S-24C04A 4 Kb Serial EEPROM Memory
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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This new heat sink design has us intrigued. What's hiding under there?
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Warranty voiding stickers on the heat sink screws? That's odd. Could that mean...
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Yes! The CPU is modular, too! It lifts right off with the heat sink, revealing a standard LGA 1151 CPU socket.
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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This CPU is quite well thermally-pasted into its heat sink; prying it out was surprisingly tough. Someone wants this processor to keep cool.
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Finally, we're face-to-face with the star of this teardown: an Intel SR32W Core i5-7400 Kaby Lake CPU, 6M Cache, up to 3.50 GHz.
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But with Apple's clout and famous negotiating skills, you'd think they could get a soldered CPU if they wanted. Plus there's that mysterious modular RAM...
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Have you been hearing our pleas, Apple?
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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The final bit of interesting modularity on this board: a CMOS battery.
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With all this new modular hardware, it almost looks like they ran out of space for this guy. It's hilariously placed vertically in this cute little battery toaster slot.
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Or toast in your iMac for that matter...
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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Now that it's stripped of all accoutrements, we can ID this logic board's silicon:
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Intel LGA 1151 CPU socket
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AMD Radeon Pro 555 GPU
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SK hynix H5GC4H24AJR-ROC 4 GB GDDR5 2400 MHz SDRAM (4 GB × 4 for a total of 2 GB VRAM)
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Broadcom BCM5776 Gigabit Ethernet controller
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Texas Instruments CD3215C00 (also seen recently in the 15" MacBook Pro) USB type-C controller
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Intel SR2C9 platform controller hub
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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Flip the board for more chips? Don't mind if we do:
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Vimicro VC0359 camera processor
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Cirrus Logic CS42L83 audio codec
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MXIC MX25L6473E 64 MB serial flash memory
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Intersil ISL95828 Intel CPU PWM controller
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NXP Semiconductor CBTL06142E display port multiplexer (likely)
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Intersil ISL6277A multiphase PWM regulator
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Fairchild FDH10CJ MOSFET
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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Chip identification, continued:
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Texas Instruments LM4FS1EH system management controller
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Texas Instruments TAS5764L audio amplifier
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Intel JHL6540 Thunderbolt 3 controller (likely)
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Dialog Semiconductor (formerly Adesto) AT45DB021E 2 MB serial flash memory
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Winbond W25Q80DW 8 MB serial NOR flash memory
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Macronix MX25L1006E 1 MB serial NOR flash memory
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Texas Instruments TMP423 triple remote/local temperature sensor
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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Chip identification, continued:
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Fairchild FDMF5804 smart power stage
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International Rectifier IRF3575 60 A synchronous buck controller
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Texas Instruments LP8565A128 MOSFET driver
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Renesas (formerly Intersil) ISL62383C notebook power supply controller
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Texas Instruments REF3330 3.0 V voltage reference
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Texas Instruments TPS3897 1-channel voltage supervisor
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Texas Instruments TPS3847108 380 nA voltage monitor
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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Chip identification, continued:
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Texas Instruments INA210/INA213/INA214 current sense amplifier, OPA348 operational amplifier, and TLV3701 high-voltage comparator
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Texas Instruments TPS51916 memory power supply
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Texas Instruments TPS54622 6 A synchronous buck converter
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Texas Instruments TPS62130B 3 A step-down converter
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Texas Instruments SN74LVC08A and Nexperia (formerly NXP Semiconductor) 74LVC08A 4-channel, 2 input AND gate
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Nexperia (formerly NXP Semiconductor) 74LVC1G99 3-state configurable function gate
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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Turning our attention back to the display: the fancy new panel comes courtesy of LG (who also made the fancy old panel).
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And that famously W-Fi allergic external monitor...
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Now moving to the display chips, read on!
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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Take a peek at what powers those popping pixels:
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Texas Instruments SN74LVC8T245 8-bit dual-supply bus transceiver
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Texas Instruments BUF16821 programmable gamma-voltage generator and Vcom calibrator
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Parade Technologies DP665 LCD timing controller (the same found in the last generation iMac 4K)
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Texas Instruments TPS54218 4.5 V to 17 V input, 2 A synchronous step-down SWIFT converter
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Texas Instruments TPS54320 4.5 V to 17 V input, 3 A synchronous Step-Down SWIFT converter
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Texas Instruments TPS65168 high resolution, fully programmable LCD bias
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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Display controller board chip identification, continued:
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Texas Instruments TMP423 triple remote/local temperature sensor
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Winbond W25Q40CL 4 MB serial NOR flash memory
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Texas Instruments TPS3808 current supervisor
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Ricoh R1154N065B 150 mA LDO regulator
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Texas Instruments SN74AHC1G08 single 2-input AND gate and SN74LVC1G04 dual inverters
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Texas Instruments SN74LVC1G98 configurable multiple-function gate
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이 단계는 번역되지 않았습니다. 번역을 도와주십시오
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Previous iMacs featured a dual-mic setup, with two microphones hiding behind the front-facing camera. Two microphones allows the device to filter out ambient noise and produce a cleaner signal.
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This year, it seems Apple switched to a single microphone—and moved it to the bottom of the display, behind the glass.
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- The CPU and RAM—two of the components you are most likely to upgrade at some point—are both modular.
- The standard 2.5" SATA hard drive is fully upgradable—though you can't add a blade SSD thanks to an empty pad on the logic board.
- Cutting the tape to open the iMac isn't too hard (with the right tools), but it must then be replaced to complete any repair.
- Most replaceable components (like the RAM) are buried behind the logic board, meaning you'll have to take apart most of the iMac just to gain access to them.
- The glass and Retina Display are fused together, increasing the cost of replacement.
최종 결론
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You mentioned a 3.5" SATA HDD in "Final Thoughts", but as per the Picture it seems to be a 2.5" as previous models. Can you please confirm. Thanks
I fixed it right now!
Apple offer Fusion and SSD as BTO options - so the logic board must be different for that surely as you said there is no SSD slot? Another tear down in a few days/weeks!!?
The Fusion-Drive and the SSD only versions might have the necessary connector soldered onto the board. At the photo, you will see the screw hole for mounting a Blade SSD.
And you can see where the connector would be soldered at the bottom left of the board.