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 all
Just wanted to share my success in erasing and burning the SW EPROM for the older Beomaster and Beocenter systems :)
I had some spare original 27C512 EPROMS with SW for Beocenter 8500, Beomaster 3500 and BM4500 lying around. Rangin from version 1.0 to 2.2 between the different systems.
Found out that in most cases, B&O actually used the UV erasable versions in production, so decided to figure out if I could read and write from an to these EPROMS. That way I could upgrade especially BM3500 and 4500 systems, to the latest 2.2 SW with 2-way IR and timer :)
Created a DIY EPROM burner and fitted it on top of an Arduino Uno with en Ethernetshield. This shield is only because I had it lying around, and it has a SD Card slot where I could read the SW for burning from :)
And behold.... a great success, the pictures below shows the burner, some of the HEX code read from the burned EPROM, and a Beomaster 3500 running SW 2.2 with 2-way IR :)
/Jacob
Congratulation for your success.
How I wish you could do the same with the beosound 3000 Eprom!
I've got one almost brand new lying around, with the eprom fried.
And I suspect I'm not the only one ;-)
Regards
M.
matador43: Congratulation for your success. How I wish you could do the same with the beosound 3000 Eprom! I've got one almost brand new lying around, with the eprom fried. And I suspect I'm not the only one ;-) Regards M.
I've got 2 dead 3000's :( It is really incredible how they managed to design those processors to burn out like that. It happens also for the BV7 TV's, they use the same type.
It is not possible to burn those eproms on account of the pincode. At least to my understanding :)
Well done...you never know...you might figure out the Beosound 3000 issue eventually! You would make many people very happy. Are you going to be selling the updated Eproms for the Beomasters?
Jacob,
That really is a fantastic project and congratulations on getting it working which I am sure will inspire many other members.
Regards Keith....
BenSA: Well done...you never know...you might figure out the Beosound 3000 issue eventually! You would make many people very happy. Are you going to be selling the updated Eproms for the Beomasters?
I didn't do it with the plan of selling a lot of these eproms, after all, they are older systems, and at least the 2-way IR are limited in use, since most of the BL5000 remotes are dying, and the BL7000 are rare, but at least fixable :)
The thing that could help people, are the different SW for the 6500/7000 regarding link options and so on. It is now possible to burn these new SW versions, and this is also true for the BC2300/Ouverture if that is needed.
But of course I am willing to help out if people need new SW, and it is a version I have, or can get hold of :)
Keith Saunders: Jacob, That really is a fantastic project and congratulations on getting it working which I am sure will inspire many other members.
Thanks Keith..
It started out by scrapping an old VX7000 VCR, and noticed the 27C512 EPROM with the UV window, and decided to give it a try :) If it worked it was great, if not, so be it.. But after having read the EPROM, and actually reading stuff, I took out an existing BM4500 2.2SW Eprom, and compared my readings with an original HEX file I had for the 2.2SW, and saw that they matched 100%, so I knew that I had the wirering all right, then it was just a matter of figuring out the special voltages for when burning these eproms,
Did it all on a breadboard for the first try, but all the wires was not 100% reliable, in that the same chip could give a different reading each time I read it, so decided to make a better version on a prototype board instead. That worked like a charm, and all readings are 100% the same.
It was a learning project at first, and it worked :)
Nicely done Jakob!
Don't forget to check the Eprom after erasing with UV light.
I've collected all sorts of software and Eproms over the past years. Just for help to repair this kind of failures without being dependent from B&O.
I use a Mini Programmer with several boards for different packages (PLCC, DIP, QFP etc.)
Most times the Eprom and software are unaffected. It's the processor itself which fails due to the amount of heat it produces.
That same heat can also affect several other components around on the board.
If it is only the Eprom at yours, then another Eprom would be the solution. But I doubt that.
Beobuddy: Nicely done Jakob! Don't forget to check the Eprom after erasing with UV light. I've collected all sorts of software and Eproms over the past years. Just for help to repair this kind of failures without being dependent from B&O. I use a Mini Programmer with several boards for different packages (PLCC, DIP, QFP etc.)
I always check the EPROM after erasing, just to make sure it is empty and working :)
If this was something I would do a lot, and with other EPROMS, I definitely would by a professional programmer instead, but had everything for this prototype just lying around, so decided just to try as a "learn more" project :) Don't have any expectation that I am going to use it a lot :)
Maybe you're right. My knowledge on that matter is limited to running the test mode, which resulted in something like "eprom default" (can't remember accurately).
The symptoms are well know on this forum: power on, doors open, cd tray open and close and thats it.
Anyway, an official repair would be more expensive than the value of the 3000 itself (I got it for like 20€) and, just for fun, when i asked a official B&O retailer about the average cost for replacing the eprom I was told that there's NO eprom in the beosound 3000…
Now I'm just keeping it for spare parts like doors, power, maybe CD for my Ouverture but I secretly dream to see it work one day.
Would be the processor easier to fix than the eprom?
BS3 DVB-HD, BV7-40 MKIII, BC6-26, BC6-23, BV4-50/BS2, BS5, BS9000, BL3500, MLGW, BLGW, PlayMaker, - BS6500, BS4500, LX6000, VX7000, MX5500, VX5000 - Beo6, Beo5, BeoTimex2, Linctonic
Stefan E:Well done Jacob, Would it be possible to purchase a old sw of you for a BM4500 so I can downgrade it to non 2 way. I have a chip with sw1.6 on it, you can send me a private message, but why would you downgrade ? Stefan
Would it be possible to purchase a old sw of you for a BM4500 so I can downgrade it to non 2 way.
I have a chip with sw1.6 on it, you can send me a private message, but why would you downgrade ?
Stefan
Weebyx: Stefan E:Well done Jacob, Would it be possible to purchase a old sw of you for a BM4500 so I can downgrade it to non 2 way. Stefan
Stefan E:Well done Jacob, Would it be possible to purchase a old sw of you for a BM4500 so I can downgrade it to non 2 way. Stefan
GREAT project and well done! That could be well expaned to:
- Beolink 1611 converters
- Beolink passive
- Beolink active
- Beosound 3000
- Beosound 3200
- Beosound 9000
- ...
Weebyx:but why would you downgrade ?
Stefan E: Weebyx: but why would you downgrade ? Mainly due to that with sw versions before 2way you could set the BS4500/3500 system to work as slave in a system there you already have a master.
Weebyx: but why would you downgrade ?
but why would you downgrade ?
Mainly due to that with sw versions before 2way you could set the BS4500/3500 system to work as slave in a system there you already have a master.
Ok, you can email me if you need to know more :)