21.5 inch 4K iMac dismantling large exposure, internal chip list!
The i1.53 graphics performance of the 21.5-inch screen with 4K screen is twice that of the previous generation. Powerful graphics processing allows an iMac to simultaneously drive five 4K resolution screens for graphical editing.
500 nits, 1 billion colors, two Thunderbolt 3 interfaces, is this the new iMac? We already know the configuration information of the 21.5-inch 4K iMac, so what is the secret inside the device? The well-known dismantling website iFixit has dismantled the 4K iMac.
Appearance, the 2017 4K iMac does not change much, the configuration information is:
3.0GHz quad-core Intel Core i5 (can be GT to 3.5GHz)
8GB 2400MHz DDR4 memory
Radeon Pro 555 GPU, 2GB of video memory
1TB (5400 rpm) hard drive
802.11ac WiFi and Bluetooth 4.2
Screen brightness increased by 43% (500 nits), resolution 4096 x 2304, P3 wide color gamut
The interface behind the iMac body includes: headphone jack, SD card reader, 4 USB ports and Ethernet interface
Of course, there are two Thunderbolt 3 interfaces that double the bandwidth of the Thunderbolt 2 interface and can connect four 4K monitors, but Apple mentioned that it can only support two. The 2017 iMac uses the same mold A1418 as the 2015 iMac, but the EMC is 3096
Starting from the screen, carefully disassemble the iMac
Overall, the size of the motherboard has increased.
It is difficult to disassemble the right speaker and is blocked by the motherboard.
There are no exceptions in the rest, power, hard drives and fans.
Although there is no 27-inch iMac to replace the memory, but the 21.5-inch 4K iMac still supports self-upgrading memory. Apple is equipped with SK Hynix's H5AN8G6NAFR 8Gb DDR4 SDRAM.
Under the heatsink is the processor, CPU, and the standard LGA 1151 interface. This is also the first time that iMac has supported the replacement of CPUs in recent years.
The processor is Intel SR32W Core i5-7400 Kaby Lake processor, 6M cache, can be Turbo to 3.5GHz
CMOS battery on the motherboard. Due to the new modular hardware, there is little room left for CMOS batteries.
The chips on the motherboard include:
Red: Intel LGA 1151 CPU slot
Orange: AMD Radeon Pro 555 graphics card
Yellow: SK Hynix H5GC4H24AJR-ROC 4 Gb GDDR5 2400 MHz memory
Green: Broadcom BCM5776 Ethernet Controller
Purple: Texas Instruments CD3215C00
Blue: Intel SR2C9 Platform Control Center
The back of the motherboard includes:
Red: Vimicro VC0359 camera processor
Orange: Cirrus Logic CS42L83 Audio Controller
Yellow: MXIC MX25L6473E 64 MB flash
Green: Intersil 95828 HRTZ X707DMB
Purple: NXP (NXP) 6142E
Blue: Intersil 6277A HRZ W711BH3
Pink: Fairchild Semiconductor FDH10CJ
4K iMac panel from LG, model LM215UH1-SDB1
The chips on the screen include:
Red: Texas Instruments SN74LVC8T245 8-bit dual power bus transceiver
Orange: Texas Instruments BUF16821 Programmable Gamma Voltage Generator and Vcom Calibrator
Yellow: Parade LCD timing controller
Green: Texas Instruments TPS54218 4.5 V to 17 V input, 3A synchronous buck SWIFT converter
Purple: Texas Instruments TPS54320 4.5 V to 17 V input, 3A synchronous buck SWIFT converter
Blue: Texas Instruments TPS65168 high resolution, fully programmable LCD Bias
The iMacs of previous years have a dual microphone design with two microphones located near the front camera. Two microphones allow the iMac to better filter ambient noise and produce clear signals.
This year, Apple only had a single microphone and moved to the bottom of the display.
The disassembly is completed. The maintainability score is 3 points and the full score is 10 points. Both the CPU and the memory can be upgraded, but most of the accessories are hidden on the back of the motherboard and require a lot of work to complete the disassembly.
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