ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Hi,
i'm looking for an Eprom (or a copy file to create one) for my Beomaster 5500.
It has to be a beomaster with Beolink.
Someone could help ?
Thanks
Theo (zazou)
i was looking for the same thing and apparently B&O won't give the EEPROM info away just like that as in some cases the PIN number might be encrypted in there . Good luck anyway
Hi all, and Happy New Year !
I'll will answer to my question :
I received an PM from a German guy (Die Bogener) wich send me the file i wanted. But after this, i didn't really know how to do. So, he proposed me to send him the Cpu Board of my Beomaster 5500, what i did.
A few days later, after repairing, he returned the Cpu Board; i mounted it in my Beomaster , and voilà, it's working very well now. This guy was very helpfull and did the work for only some Euros.
So December was very happy for me:
- First : a nice beoworlder repaired my Beomaster
- Second: i won a pair of Beolab 8000 on Christmas Price Draw
What ask furthermore ....
Regards
Theoz (zazou)
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hello,
i have an eeprom problem with my bc1. how can i contact this miracle-worker to see if he can save my bc1 ? thanks !
- scott
Zazouzt: received an PM from a German guy (Die Bogener) wich send me the file i wanted. But after this, i didn't really know how to do
It's not that complicated. You need an Eeprom programmer (40 euro) in order to read the file, buy an Eeprom chip 27C512 approx. 1 euro and just copy the file to your chip.
Brengen & Ophalen
There is a huge difference between a Eprom and a EEprom.
The Eprom is only programmed one time, then never again.
The EEprom is programmed in System and can be rewritten by Software, like todays Flash Memory.
Programming a Eprom is easy... EEprom is much more difficult, because the data are unique. Every BC-1 contains its Serial number, theft protection inside this EEprom. You will not get this data...
I was talking about copying BC9000 series and Ouverture likes. Also BM3500/4500's. I meant Eeprom where E stands for Erasble right?
Right.
The EEprom can erase and rewrite a page of its Memory, some Bytes. It is usual, that there is also a protected area where data like series numbers and Access codes are stored. These data are unique and cannot be copied.... only if you copy the chip from a functioning BC-1 or whatever. Then you have a copy of this unit where you maybe have a lot of fun with if it comes to a Service...
Let's say, every B&O Hardware with an Access code to activate its function has a EEprom or a Flash Memory. And there the Problem with replacement Begins.
The old BM5500-7000 has also a EEPROM, but it uses this chip as a storage for the Station data, loudness, bass and treble, not for codes. This old stuff can be repaired easily.
Die_Bogener: The old BM5500-7000 has also a EEPROM, but it uses this chip as a storage for the Station data, loudness, bass and treble, not for codes. This old stuff can be repaired easily.
They have an EPROM (27c128 or 27c256 or something like that) for the CPU code whereas I always thought of theusers memory as being NVRAM rather than EEPROM?An EEPROM has no need for battery support.
Martin
It uses a 256bit x8 Serial NV chip with a battery backup, right. EEprom is wrong in this case. Some other Hardware of this time uses Serial 8-pin EEproms... MX tv, BS2500
Die_Bogener: Right. The EEprom can erase and rewrite a page of its Memory, some Bytes. It is usual, that there is also a protected area where data like series numbers and Access codes are stored. These data are unique and cannot be copied.... only if you copy the chip from a functioning BC-1 or whatever. Then you have a copy of this unit where you maybe have a lot of fun with if it comes to a Service... Let's say, every B&O Hardware with an Access code to activate its function has a EEprom or a Flash Memory. And there the Problem with replacement Begins. The old BM5500-7000 has also a EEPROM, but it uses this chip as a storage for the Station data, loudness, bass and treble, not for codes. This old stuff can be repaired easily.
Thanks both Martin's, interesting and usefull information!
Hello community, my beomaster 6500 gives me a "88" at self test of the Microcontroller. Nevertheless it hangs and does not accept IR commands. It does not the configuration command (option 1). Reason is that the microcontroller ends up in a state where the Port 3 output of the microcontroller (PIN 17) is 1.8V. That is odd because it mutes the IR Receiver input to the microcontroller but does not output anything to the IR transceiver inside the beomaster 6500
2 Possible reasons:
1.: Content of the EPROM 27C512 (SW-Version 1.4) now has an error after 27 years.
2. Microcontroller 8032 from Siemens in NMOS technology is broken. (I odered identical part)
Reason 1 is more probable. Unfortunately i cannot solve it myself.
This is the reason for my post. Can someone please send the correct Eprom file for version 1.4 or 1.5, please?
Thanks in advance. In exchange I can offer help in overhauling several B & O devices like Beolab 8000, Beocord 9000, Beomaster 6500 and Beogram 6500.
Greetings,
Geogandalf: Reason 1 is more probable.
Reason 1 is more probable.
Reason 2 is more probable.But first check the amount of ripple on the low voltage power supplies.
And ALWAYS ESD-safe when working with CMOS!
Thanks for that tip. I recapped the beomaster completely. This way ripple is probably not the problem. What level of ripple is critical? But that is probably how I zapped the Microcontroller, in case it is destroyed. Pin 17 of the 8032 is directly connected to a connector without pull down or pull-up resistor. Touching this connector and pulling it of an on probably was the failure mechanism in case you are right.
Edit: You were absolutely right. The identical Siemens Microcontroller which I managed to buy on ebay as an NOS part perfectly works now. If anyone has to exchange the microcontroller: Erase the static Ram by grounding its supply pin. Otherwise Beomaster won't work although you have a working circuit. And: I now own a mobile esd workplace...