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I have a display from Panasonic car stereo (Toyota Corolla), but can't determine how to work it. It's called Optrex F-51684, and there is no datasheet for that LCD. Is it possible to find how to work with it without datasheet? This is screenshot of the connector pins from main board: connector

So it has a serial interface, i can select a chip here (CS1 and CS2), but also there is an unknown pin LCD-DET.

I thought it has S1D15605 (like nearest Optrex LCD-s) controller but pins seem different. Also there is chip on the module, marked as EF766102 B01 R ,without any information about it on the internet. Same time it has a name IC2 so it should be second chip, but there is no sign of IC1. Can it be hidden somehow?

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  • \$\begingroup\$ It's possibly a reset pin. \$\endgroup\$ – Andy aka Jan 27 '17 at 10:04
  • \$\begingroup\$ There is also LCD-RST on the other side, two reset pins? \$\endgroup\$ – Ildus Jan 27 '17 at 10:05
  • \$\begingroup\$ I make it a rule never to design with anything that doesn't have a recognizable data sheet so it's anyone's guess. \$\endgroup\$ – Andy aka Jan 27 '17 at 10:19
  • \$\begingroup\$ Look at the chips on the LCD module, see if you can identify the LCD controller chip. It may be possible to get a datasheet for that chip, in which case you are 90% of the way there. \$\endgroup\$ – Steve G Jan 27 '17 at 10:43
  • \$\begingroup\$ I've added additional information to the post about chips. \$\endgroup\$ – Ildus Jan 27 '17 at 11:05
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Is it possible to find how to work with it without datasheet?

Absolutely possible, just like finding a needle in a haystack is possible.

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