Beomaster 8000 - What Processor IC's Do You Have

6 replies
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sonavor (archived2)
Bronze
Posted October 25, 2019 at 16:10 GMT
#2210507

Hi,

In restoring quite a few Beomaster 8000 units over the last few years I have seen Beomaster 8000 Microcomputer boards with different parts. Most of those differences are documented and expected. However, there is one change that I don't have any documentation for...The "slave" processor, 9IC4 is usually identified as part number B08340239S (as seen in the attached photo). I have come across several Microcomputer boards where 9IC4 is marked with a part number as B08340265S. The boards appear to work the same but I am wondering if the new B08340265S firmware is different.

Note that all of the boards where I have come across the updated 9IC4 have been from Beomaster 8000 USA models. I am wondering if any European Beomaster 8000 owners have Microcomputer boards with 9IC4 part numbers B08340265S? 

I would also be interested in any information about the change of that part.

Here is a photo of two different Beomaster 8000 Microcomputer boards (the early version and the later version). It also shows the two different 9IC4 part numbers.

Thanks, -sonavor

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chartz (archived2)
Bronze
Posted October 25, 2019 at 18:44 GMT
#2210508

Hi John,

How are you?

I have two BM8000s and I have both versions.

The cases are different: one is easily opened and the other is a PITA.

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sonavor (archived2)
Bronze
Posted October 25, 2019 at 19:01 GMT
#2210509

Hi Jacques,

I'm doing well. Yes, the early version boards (8002401) are a real pain to open up for sure. Do you have any photos of the processor ICs from when you did your restoration?

John

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chartz (archived2)
Bronze
Posted October 25, 2019 at 19:05 GMT
#2210510
Just that one, sorry.

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sonavor (archived2)
Bronze
Posted October 25, 2019 at 19:45 GMT
#2210511

That's fine, thanks Jacques.

It has the expected B&O original B08340239S for 9IC4. Hopefully some other owners in the Europe market can see if anyone has the B08340265S chip.
I suspect is was produced (or licensed to be produced) by B&O as a replacement spare. Having a different part number though makes me think they updated the firmware. I haven't come across any different part numbers for 9IC3 yet. So far they are all B08340238M part numbers.


John

hamacbleu
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hamacbleu
Bronze
Posted December 8, 2019 at 19:52 GMT
#2210512

Hi John,

Did a few work today on my BM8000 in the microcomputer area, so I took the opportunity to take a photo of the IC. I also have a second BM8000 (most recent serial) that I keep for parts (but never took anything out of it since I would prefer repairing it instead.)

A strange thing I notice : on the recent one, jumpers are soldered directly to the ic pins. On my "working" unit, the jumpers are soldered on the back of the PCB...

Guillaume

Location: Québec, Québec

Guillaume
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