Friday, January 06, 2017

Apple Thunderbolt Display – Disassembling procedure – How to remove the display – How to remove the power supply – how to remove the mother board

SPECIFICATION 
27" TFT Active-Matrix LCD
2560 by 1440 Pixel Resolution
Built-in Thunderbolt and MagSafe Cables
FaceTime HD Camera with Microphone
49 Watt 2.1 Speaker System
16:9 Widescreen Aspect Ratio
The Thunderbolt Display contains a sweet lineup of USB, HDMI, VGA, and DisplayPort ports
The luscious backside of the Thunderbolt Display contains only a small line of specified ports:
Three powered USB 2.0 ports
FireWire 800 port
Thunderbolt port
Gigabit Ethernet port.
The Thunderbolt Display also comes with a built-in Thunderbolt cable attached to a Universal MagSafe cable.
DISASSEMBLING PROCEDURE 
Much like the iMac we tore apart earlier this year (and the iMacs before it), the Thunderbolt
Display's front glass panel comes off with the help of some heavy duty suction cups.
It's time to take a look under the hood. A few connectors and a ground screw are all that prevent the freedom of the LCD
The 27-inch (diagonal) TFT activematrix LCD has a resolution of 2560 by 1440 pixels, the standard for displays of this size and price. Its 12 ms response time and 16.7 million colors, however, fall short of the 6 ms response time and 1.07 billion colors
The back of the LCD display has only a few cables, none too exciting:
DisplayPort
LED backlight
LED backlight sync
Ground loop.
The LG display reads model number LM270WQ1.
It appears to be the same display found in the iMac Intel 27"
With  LCD removed you get a full frontal view of the Thunderbolt Display's inner layout.
The fan is easily removed simply by detaching a couple of connectors and unfastening a few screws.
Apple has, as usual, chosen to go with a large, brushless fan to keep the colossal Thunderbolt Display nice and cool.

In pursuit of self-preservation, begin by disconnecting the power supply connector from its socket on the logic board to prevent any electrifying experiences.
A few more T10 Torx screws bite the dust at the hand of our bit driver kit, and the logic board is detached.
Remove a plethora, of connectors from the logic board, leaving only the brains behind the Thunderbolt port between us and the display's control center.
A few T6 Torx screws are knocked out to remove the connector cover, and the Thunderbolt cable is disconnected.
Interestingly enough, the Thunderbolt cable that routes into the display also plugs into a standard Thunderbolt socket on the logic board. Apple could have just soldered the cable wires to the board, but instead chose to implement a cover that prevents the cable from being detached from the logic board's Thunderbolt socket
St. Damien's beard! The front of the logic board includes these stellar packages:
Pericom PI7C9X440SL PCIe-to-USB 2.0 host controller L129NB11 EFL, which looks to be the Thunderbolt port controller (as viewed in the second picture)
Analog Devices ADAV4601 audio processor
NXP LPC2144 USB 2.0 microcontroller
Delta LFE9249 10/100/1000 Base-T LAN filter
SMSC USB2517-JZX USB 2.0 hub controller
LPC 1114F
Sweet grandmother's spatula! The back of the board also contains doodles of chips:
Maxim MAX9736B Mono/Stereo
High-Power Class D Amplifier
Texas Instruments LC573A Dtype Latch
Silego SLG8SP568VCK505 Clock Generator
LSI L-FW643E-2 Open Host Controller Interface
Broadcom BCM57761 Gigabit ethernet controller
Texas Instruments NH245 Dual Supply Translator
Supertex HV9982 3-channel switch-mode LED driver IC
With the logic board removed, we move on to the power supply board.
A few screws and connectors are all that are stopping us from removing the board.
Make quick work of them and the Flextronics power supply board comes free.
Thunderbolt Display's power supply board
About 250 watts of maximum continuous power
You will see some fairly large speaker enclosures (well, for a monitor) near the side edges of the Thunderbolt Display and eagerly remove the screws holding them in place.
The Thunderbolt Display comes with a 49 watt 2.1-speaker sound system, including a miniature subwoofer.
A couple screws and a single connector keep the HD FaceTime camera secured to the case.
The front side of the camera board:
cFeon LV010-45RNIP 11113A 1110ADA
The rear side of the camera board:
Vimicro VC0338BSMCB Camera Controller
Texas Instruments TPS65708 Power Management Unit