98% of the time they’re either looking at something completely different, providing an alternate Things remotely but when have to and things aren’t making sense I’ll ask for pictures to make sure what the tech is looking is what I actually asked them to look at. The official Samsung cableĮven has a little warning sticker about this.īeyond that see if you can get the tech to send you pictures of the disply showing that it is set for 232 and not network and which ID it is set for. Some Samsungs require an extra (firm) little push to get it the last little bit in. Really easy do get in the wrong place if you’re reaching your hand under a display on a fixed mount or just moving too quicklyĢ- Make sure they’re on the MDC IN and not the MDC out – not all Samsungs that speak MDC have an out jack but on those that do the out is sometimes moreģ- Make sure the connector is fully seated. The header (in this case the AA) is not part of the checksum calculation, only the Command+ID+Data Length+Data1 (Data value) are part of the checksum calculation.To clear the stupid questions (that I’ve had techs do with Samsung in the past month though not sure if it was a QMġ- Make sure they’re actually plugging into the MDC IN jack, not the audio in that is also an 1/8” jack and on some displays right next to MDC IN (e.g. If the checksum exceeds 2 digits, discard the first digit and convert the remaining 2 digits to decimal. The Checksum needs to be calculated in Hex first, then converted to decimal using the calculator provided above. Please pay special attention when calculating the checksum. I have included the checksum calculation in Hex and Decimal for each command. Here are some Samsung Hex to Decimal conversions that will work with the above documented method.

Here are some links to our Support documentation regarding Serial connectivity Here is the spec from the Samsung manual I believe the 3.5mm cable that comes with the TV is a NUL model cable intentionally, as it is used to daisy-chain multiple monitors together to utilize the MDC protocols. You can test this with a continuity meter and male sure the tip goes to the tip and the ring goes to the ring. The manual for the QM series states that they Receive on the 'Ring', so if the BrightSign player Transmits on the Ring, a straight through cable would be required. You need to be using a Straight through cable for Samsungs. BrightSign players receive Data on the tip. By pulling the 3-wire TRS out like that, you are now connecting the tip of the cable to the ring of the player.

Samsung qm98n rs232 commands