I'm trying to salvage a Samsung LTN154AT07 LCD from a laptop. I've ordered an MT6820-B rev.3 universal LVDS driver and a 5A step-down module (XL4005), and I think I have a decent grasp of how everything goes together (there's already an inverter on my LCD). I'm following this tutorial: http://sites.google.com/site/lcd4hobby/lcd-tft-as-pc-monitor

The problem that I am having is with the 30-pin cable. I found the pin diagram for the monitor, and also the pinout on the MT6820-B, but the abbreviations for the outputs/inputs are completely different on each. I was hoping that perhaps someone might be able to help match them up so I don't fry the monitor. Once I know what goes where, I can rewire the 30 pin cable. Even if someone can help match up some of the wires it would be a great help.

The image below shows the LTN154AT07 LCD pin assignment on the left, and the MT6820-B controller on the right.

Here is a link to the LTN154AT07 monitor's booklet in case there is some info missing from my image: http://www.beyondinfinite.com/lcd/Library/Samsung/LTN154AT07.pdf

*edit: here it is in question form:

I am trying to connect the controller on the right to the monitor on the left with a 30-pin LVDS cable. Can someone please help me decipher which pins from the monitor go to which pins on the controller card?

Thanks in advance for any assistance!



LTN154AT07 on left, MT6820-B on right


closed as off-topic by placeholder, uint128_t, Bence Kaulics, Daniel Grillo, Voltage Spike Jun 9 '16 at 16:16

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  • \$\begingroup\$ Welcome to EE.SE This is a Q&A style site, it appears your post does not contain a question or questions. Please edit you question and make it easier to answer by posting a question. Please visit the help center electronics.stackexchange.com/help/how-to-ask for reference on posting questions. Thanks \$\endgroup\$ – Voltage Spike Jun 6 '16 at 22:15
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    \$\begingroup\$ I don't understand how the above is not considered a question? "how do I configure the wires in the LVDS 30 pin cable from the monitor on the left to the controller on the right" in a nutshell. \$\endgroup\$ – Tesseract Jun 7 '16 at 12:12
  • \$\begingroup\$ @Tesseract Still not a single question mark in your "question". \$\endgroup\$ – winny Jun 7 '16 at 12:51
  • \$\begingroup\$ First, make sure the 3.3 V/5 V selector is set to the 3.3 V position. \$\endgroup\$ – Andrew Morton Jun 7 '16 at 14:19

First of all set 3.3V supply voltage with jumper, as @Andrew Morton wrote in comments. Connect signals in the following manner:

  1. All pins marked VSS on LCD (1,10,13,16 and 19) to GND
  2. LCD supply VDD (pins 2 and 3) to VCC
  3. First differential pair: RxIN0- (pin 8) to O0- and RxIN0+ (pin 9) to O0+
  4. Second differential pair: RxIN1- (pin 11) to O1- and RxIN1+ (pin 12) to O1+
  5. Third differential pair: RxIN2- (pin 14) to O2- and RxIN2+ (pin 15) to O2+
  6. Clock signal differential pair: RxCLK- (pin 17) to OC- and RxCLK+ (pin 18) to OC+
  7. Pins 4,5,6 and 7 are used for EPROM identification chip on LCD, but Your driver board doesn't use that feature, leave these lines unconnected, do not connect to them to GND, nor to VCC!
  • \$\begingroup\$ thank you! so like this? imgur.com/4Z0Bo2a \$\endgroup\$ – Tesseract Jun 8 '16 at 4:55
  • \$\begingroup\$ @Tesseract Exactly, but also connect pin number 1 from LCD to GND! If it works, please don't forget about accepting and upvote the answer. \$\endgroup\$ – Jakub Rakus Jun 8 '16 at 20:17
  • \$\begingroup\$ Connect pin #1 from LCD to the GND pin on the second row (row 2, GND/VCC)? Or down to the ones that are 3 rows from the bottom? \$\endgroup\$ – Tesseract Jun 9 '16 at 18:43
  • \$\begingroup\$ @Tesseract Any GND pin should work, but I think it will be easier to connect #1 from LCD to GND pin in row 2 (pin number 4 in this case). \$\endgroup\$ – Jakub Rakus Jun 9 '16 at 21:21

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