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A project log for It's evolving: Aiphone video intercom

Modifying an old video intercom to bring it up to the 21st century.

FlorianFlorian 06/27/2021 at 01:270 Comments

Let's see that display module in details: 

it is labeled "TB10126 R" (frame top side), the TFT display itself is made my AUO and labeled "06B806Z84B227I026A0U00 8501". Those keyword returned nothing on Google so let's have a look on the back.

A 10 pin connector CN101, to which only 6 connections are made. Also, 3 big ICs (one is under the ribbon cable) which are:

From the SANYO image controller datasheet, one of its feature is ”CVBS, S-Video,YCbCr/YPbPr input" and a closer look at the input table shows 2 CVBS inputs, one S-Video input and one YCbCr/YPbPr input. As this controller is right next to the only connector on this display module, I traced all the pins connection with a multimeter and came up with the following schematic:

To summarize:

Next time I will confirm the input voltage of this display module, the ouput voltage of the LM2736, simulate the circuit between the composite video input and CVBS1 to understand its function and maybe analyze the intercom mainboard's circuit to which this display module connects.

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