tft display teardown in stock
The chip is labeled 8333(made by Seiko Instruments Inc) and is generating multiple voltages for the display. The three caps from L201 going to three diodes are parts of the charge pumps producing positive and negative voltages needed by the panel. (Usually +21,-9,+7 V etc). Input signals come through a 40 pin connector, with four differential pairs running LVDS.
Looks like the connector is carrying (Right to left) Power, GND, 4 diff pairs of LVDS data and what appears to be I2C data to serial EEPROM. The top of the chip has S24C on it and the let side pins are all grounded- typical pinout for an I2C eeprom, where pins 1-3 are address and 4 is GND. Only puzzling part is power pin 8 that seems to go to the connector instead of power plane, and lack any decoupling caps. The EEPROM stores the so called EDIDdata for display identification to the main system. Regular monitors do the same via signals in the VGA cable.
Update 8/5/2012: thanks to the folks at the EEVblog Forum threadfor a lot of insight on how these things work, and their help locating information on some of the parts and the display datasheet(older rev, but very close)
The mail was something related to “The New Arconic”, which appears to be a proxy fight over control of the Arconic corporation (formerly Alcoa, the Aluminum Company of America). They want me to vote for new candidates for the board of directors – blah blah boring. But instead of sending me a persuasive letter or glossy brochure, they mailed a purpose-built video player with a 3 inch TFT screen and control buttons built into a small cardboard envelope.
The guts contained a TFT display module, with a piece of paper glued to the back, and a small circuit board affixed to the paper. Everything was connected by point-to-point wiring, and appeared to be hand-soldered. A 500 mAh 1.85 Wh LiPo battery powered the system. Five standard 12 mm tactile switches were taped around the edges, and a circular element in the corner I’m guessing was a piezo speaker. The only component I couldn’t identify was a tiny circuit board containing a single 3-pin chip, attached to a 1cm circular metal disk. It’s labeled Q5, and I’m guessing it’s the transistor used to enable power to the main board. [It’s actually a magnetic relay that turns on the power when you open the box cover.]
The main board contained three large chips: a Toshiba FV194 14399AE, a Hynix _Y5DU561622DT-J, and an unbranded E200 GC137DA. The first letter of the Hynix part number was obscured by burnt crud. I couldn’t find any info on the Toshiba chip, but based on its appearance and by process of elimination I’m guessing it’s a flash ROM containing the video file to be played. The Hynix part is DRAM of some type, though I couldn’t find an exact match on the part. The E200 is a PowerPC based system-on-a-chip. While searching for info about it, I found this Hackaday article from 2014 describing a teardown of very similar hardware. It looks like this is a standard platform for disposable electronic advertising, and the Italian company that makes them is here.
Before we go any further, we"d like to give a big thanks to Chipworks for helping us with the teardown, and for providing the awesome sensor images you"ll see below.
If you scratch or crack the display glass on an older Nikon DSLR like the D90, it"s possible to find an inexpensive replacement and fix it yourself. With the inseparable glass, though, D600 users will definitely want to opt for some type of screen protection.
We could probably write an entire teardown for the top case of the D600 alone, but we decided to spare you. Take our word for it, there"s a lot of stuff crammed in there.
This is the point in the teardown when stuff just starts coming out of the device left and right. A lens mount here, a ribbon cable there, whatever that is over there... the only thing that could make this better is if it was made into an awesome montage and set to "You"re the Best," à la Karate Kid.
Quality: Aftermarket- A display sold as Aftermarket is made to the same standards, specifications and materials as the original. Aftermarket quality displays feature TFT technology. It is a copy of the original, with the display shipped as Aftermarket having (in rare cases) minimal variations in functionality, quality or appearance. To find out more about quality,