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Bang & Olufsen
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Bang & Olufsen

by failed on Sun Nov 18, 2007 1:28 pm

Hello

Does anybody have the codes for Bang & Olufsen TV's?

Thanks
failed
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by maltman23 on Tue Nov 20, 2007 1:46 am

I've never gotten the codes for a B&O. I heard from someone that the carrier frequency is 160KHz. If that is true, then I'm not sure how well our hardware will work at that rate. But it is certainly worth a try. One way to get the code would be to go to a store that sells B&O TVs and bring along a learning universal remote control. This is something I've been meaning to do, but just haven't made the time to do it yet.

Mitch.

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by oPossum on Sun Dec 09, 2007 3:23 am

B&O is 455 kHz. The IR receivers in their equipment use 455 kHz ceramic filters - the same part used in the IF stage of an AM radio. They are very sensitive and quite selective (high Q).

The code is very unique. It uses three times to send the data bits rather than the usual two. There is a "one" and a "zero" as expected, and also a "same as last" code. The protocol prohibits sending consecutive ones or zeroes. There is also a start and stop time. Most codes are 17 bits. This IR coding has been in use wolrdwide since 1986.

Time intervals (from B&O docs):
T1 - 3.125 mS - Zero
T2 - 6.250 mS - Same as last
T3 - 9.375 mS - One
T4 - 12.500 mS - Stop
T5 - 15.625 mS - Start

The video power toggle code is (one uS unit of measure):

200,2925
200,2925
200,15425
200,2925
200,6050
200,6050
200,6050
200,6050
200,6050
200,6050
200,6050
200,6050
200,6050
200,6050
200,6050
200,6050
200,9175
200,6050
200,2925
200,6050
200,12300
200,0

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by maltman23 on Sun Dec 09, 2007 5:16 pm

Thanks, oPossum. I'm curious: how did you get the code? Do you have a B&O remote control?

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by oPossum on Mon Dec 10, 2007 6:20 am

I have several B&O remotes - Beo4 (Mk1 & Mk3), Beolink 1000, A9, MCP5500. All the unidirectional remotes use the same IR codes. The bidirectional remotes are all different to some degree. I don't think there where any TVs with bidirectional remotes, so the code posted above should work will all B&O TVs from 1986 to present.

Here is the A9 (and some other gadget)...

Image

It has a 8 pin microcontroller inside...

Image
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by caitsith2 on Mon Dec 10, 2007 6:54 am

oPossum wrote:Here is the A9 (and some other gadget)...

Image


That "some other gadget" wouldn't happen to be your TV-B-Gone second generation would it?
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by oPossum on Fri Dec 14, 2007 4:30 pm

caitsith2 wrote:That "some other gadget" wouldn't happen to be your TV-B-Gone second generation would it?


Just found out it is a generation 1.3, so I ordered a gen 2 & 3 to complete the collection. The gen 2 is on clearance at tvbgone.com for 5.95!
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