A few days ago we had dismantled the iMac 2015 21.5-inch non-4k version (hereinafter referred to as the standard version), today iFixit brought us Retina 4K version. The overall structure of the two is very similar, in addition to the display circuit board and the motherboard part of the chip is different, the cooling fan, hard disk and speakers, etc. and the standard version does not have any difference. Please follow the footsteps of Xiaobian to see what is the difference between the 4K version and the standard version.
Intel Core i5-5675R Quad-Core 3.1 GHz (Core 3.6GHz) Optional i7 Quad-Core 3.3Ghz (Core 3.8Ghz)
The standard version of the CPU is the i5 dual-core 1.6Ghz (Core) or i5 quad-core 2.8Ghz (Core)
8 GB 1867 MHz LPDDR3 memory (2 x 4GB)
Intel Iris Pro Graphics 6200
Standard Edition is HD Graphics 6200 (Core i5 1.6GHz Dual Core) or Iris Pro Graphics 6200 (Core i5 2.8GHz Quad Core)
1 TB (5400 rpm) mechanical hard drive with optional up to 2 TB Fusion Drive or 512 GB SSD.
Non-4K versions are 1TB Fusion Drive and 256GB SSD
It is worth mentioning that the 4K version of the EMC code is 2833, and the common version of the EMC code is 2889.
Let's compare the differences between the standard iMac 21.5 2015 and the 4K iMac 21.5 2015. The left side is a 4K screen, and the right side is a standard version of a 1920×1080 screen. The difference between the two is still obvious.
In order to meet the bandwidth requirement of 4K resolution, the display cable is widened to 16.4 mm, and the standard version is 12.4 mm.
Like the standard version, the 4K version of the monitor is also provided by LG. The model number is LM215UH1(SD)(A1) and the standard model number is LM215WF3(SD)(D5). Â
Red: Texas Instruments TPS65168 High Resolution, Programmable LCD Bias
Orange: Texas Instruments TPS54320 4.5 V to 17 V Input, 3A Synchronous Step-Down SWIFT Converter
Yellow: Texas Instruments TPS54218 4.5 V to 17 V Input, 3A Synchronous Step-Down SWIFT Converter
Green: Proview DP665 LCD timing controller (same as the 5K version iMac 27)
Light blue: Texas Instruments NH245 55K G4
Deep Blue: Texas Instruments BUF16821 Programmable Gamma Voltage Generator and VCOM Calibrator
Red: Intel SR2AJ Core i5-5675R 3.1 GHz quad-core processor (4M cache, up to 3.60 GHz) and Intel Iris Pro Graphics 6200
Orange: Samsung K4E6E304EE-EGCF 16Gbit LPDDR3 1867MHz SDRAM memory (4 memory chips, 8 GB total capacity)
Yellow: Broadcom BCM5776 Gigabit Ethernet Controller
Green: Texas Instruments LM4FS1EH SMC Controller
Light blue: Texas Instruments HD3SS213 5.4Gbps DisplayPort 1.2a 2:1/1:2 differential switch
Dark blue: Fairchild Semiconductor FDMF6808N ultra-small size, high performance, high frequency DrMOS module
Red: Intel DSL5520 Thunderbolt 2 Controller
Orange: Cirrus Logic 4208-CRZ Audio Controller
Yellow: Delta 8904C-F filter
Green: Vimicro VC0359 Camera Processor
Light blue: Intersil ISL6372CRTZ power controller
Dark Blue: Winbond 25064FVIQ
Purple: Internation Rectifier IRFH3702 30V Single N-Channel HEXFET Power MOSFET Driver
Well, our dismantling is over here, old rules, a family portrait. iFixit scored 1 point for maintenance of the iMac 21.5 2015 4K version (10 is the easiest to repair), consistent with the standard iMac 21.5. Both also use the design that the CPU and memory are soldered to the motherboard. They cannot be replaced by themselves, and only one hard disk is equipped. Users cannot add hard disks by themselves.
(Source: iFixit, translation: 91 demolition)
More fresh hot disassemble video, please pay attention to micro signal: jiuyaochai