In Philips vintage cd player models (so as in high grade brands like e. g. Krell, SAE, Proceed, Mark Levinson, Micromega) there are a often the MAB8441P in use but with a wide range of different programming codes.
The following versions of MAB8441P are very common:
T082 and T012.
But also I have found this versions:
T014-T016-T018-T078-T082-T105-T112-T146-T148-T162-T164
Probably there are many more.
But the associated datas so as information about compatibility I don't find on the web.
Please let me know, from where I can get this information ?
Follow threads don't provide the wanted informations:
Old Philips DAC module - info. required.
Help me I need MAB8441PT164 DataSheets
Help me I need MAB8441 PCF3523 PCF2705 DataSheets
Thanks for advices.
The following versions of MAB8441P are very common:
T082 and T012.
But also I have found this versions:
T014-T016-T018-T078-T082-T105-T112-T146-T148-T162-T164
Probably there are many more.
But the associated datas so as information about compatibility I don't find on the web.
Please let me know, from where I can get this information ?
Follow threads don't provide the wanted informations:
Old Philips DAC module - info. required.
Help me I need MAB8441PT164 DataSheets
Help me I need MAB8441 PCF3523 PCF2705 DataSheets
Thanks for advices.
Attachments
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This is a mask-programmable ROM controller. According to the datasheet (attached) the ROM is programmed in the factory. This is the version code you encounter. It is unique for a specific function. I am not aware of any lookup table/information source for these versions. I ran into this myself while repairing a Cyrus AM/FM tuner. I ended up writing my own firmware...
These controllers were available as spare parts from (apparently also) ASWO and others. They also rarely fail, usually they get locked up in some unexpected mode due to an unhandled/unforeseen combination of inputs or other bugs. As for spares, if they are indeed faulty you're dependant on old stock. I got lucky with a failed NEC controller in a Technics amp. A NOS one from an obscure source solved the issues completely.
You could have a go at MFBFreaks forum as there is a lot of Philips-specific information around.
These controllers were available as spare parts from (apparently also) ASWO and others. They also rarely fail, usually they get locked up in some unexpected mode due to an unhandled/unforeseen combination of inputs or other bugs. As for spares, if they are indeed faulty you're dependant on old stock. I got lucky with a failed NEC controller in a Technics amp. A NOS one from an obscure source solved the issues completely.
You could have a go at MFBFreaks forum as there is a lot of Philips-specific information around.
good advive:
MAB microcontroller versie overzicht - MFBfreaks.com
The efforts are only for the aim to find replacement devices in used condition to get the same device for the case, when it is necessary.
In the moment I need for Micromega top-loaders replacement cheap cd player models. In use are the follow:
Micromega SOLO mit CDM1-MKII/CDM4/25:
1) MAB 8441P T018 (Operating Unit/front PCB)
2) MAB 8441P T164 (Servoprozessor board)
3) SAA7310GP/SAA7321GP
Micromega DUO mit CDM9-pro:
1) MAB 8441P T018 (Operating board/front PCB)
2) MAB 8441P T162 (Servoprocessor)
Other devices with this versions:
NSM PickUp Driver Board:
1) MAB 8441P T018 (operating section)
2) MAB 8441P T164 (servo units TDA5708/TDA5709)
Krell CD-DSP
MAB 8441P T164
B&O Beocenter 8000 9000 9300 8500 9500 CD control board:
MAB 8441P T164 - go to one of the pictures under
CD Control Board for Beocenter 9500
GRUNDIG CD 35 (not CD-35X):
2xTDA1540P – SAA7030 CDM-2/10 MAB8441P-T018
Concerning this the MAB versions T162/T164 are not in use in single cd player models with loader/tray - this means only hifi consoles, music centers, hifi systems and ghetto-blasters equipped with CDM1-CDM9 (maybe with front loader but without loader with tray) uses this programmable version.
Where is such an overview/model list in the kind of those from the URL as follow ?
CD-Player-DAC-Transport List
MAB microcontroller versie overzicht - MFBfreaks.com
The efforts are only for the aim to find replacement devices in used condition to get the same device for the case, when it is necessary.
In the moment I need for Micromega top-loaders replacement cheap cd player models. In use are the follow:
Micromega SOLO mit CDM1-MKII/CDM4/25:
1) MAB 8441P T018 (Operating Unit/front PCB)
2) MAB 8441P T164 (Servoprozessor board)
3) SAA7310GP/SAA7321GP
Micromega DUO mit CDM9-pro:
1) MAB 8441P T018 (Operating board/front PCB)
2) MAB 8441P T162 (Servoprocessor)
Other devices with this versions:
NSM PickUp Driver Board:
1) MAB 8441P T018 (operating section)
2) MAB 8441P T164 (servo units TDA5708/TDA5709)
Krell CD-DSP
MAB 8441P T164
B&O Beocenter 8000 9000 9300 8500 9500 CD control board:
MAB 8441P T164 - go to one of the pictures under
CD Control Board for Beocenter 9500
GRUNDIG CD 35 (not CD-35X):
2xTDA1540P – SAA7030 CDM-2/10 MAB8441P-T018
Concerning this the MAB versions T162/T164 are not in use in single cd player models with loader/tray - this means only hifi consoles, music centers, hifi systems and ghetto-blasters equipped with CDM1-CDM9 (maybe with front loader but without loader with tray) uses this programmable version.
Where is such an overview/model list in the kind of those from the URL as follow ?
CD-Player-DAC-Transport List
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How did you go tiefbassuebertr ?
Any news from Dutch Audio Classics people?
I am working on this Cambridge Audio which has two of them, T065 and T082 variety and they might be cooked. I wanted to get some just in case without realising that they are programmable...
Please keep us updated.
Roman
Any news from Dutch Audio Classics people?
I am working on this Cambridge Audio which has two of them, T065 and T082 variety and they might be cooked. I wanted to get some just in case without realising that they are programmable...
Please keep us updated.
Roman
yes, as long as no details available concerning the Txxx programm version.
That was the reason to start this thread.
Has anyone been able to find more on the Txxx program versions and possible backward/forward compatibility? A friend of mine and I have an PHILIPS CD304 (MK I) that needs the IC replacement; funny thing - on the board is the MAB8441P-T016, while the service manual states that MAB8440P-D060 is used (!)
That T016 must be a bugfix version. There may be a service manual erratum listing that version. Or even a part number that is identical so when you would order the old chip you get the new one. AFAIK there is no manufacturing information about mask versions and their purpose except for the thread in MFBFreaksforu.
I can still remember that Philips had released numerous updates (Service Bulletin, sometimes called "Revision Manual") for authorized dealers after the service manual was already published.
Service-manuals without this information are not always helpful.
https://nanocamp.de/12-revision/philips-cd304-revision-manual.pdf
Interesting to know.
In order to the age of this information it isn't to understand, why Philips and Motorola are still not releasing them.
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Than T for that link.
From this manual, I followed a link to page:
dindiki audio with CDM-1 TDA1540 TDA1541.
What a wealth of service info there!
And a lot of nice products like belt kits, remote controllers for old players, streaming inputs for TDA-1540 & TDA-1541.
Wehnever I can, I'll be purchasing belts from them to support them.
Thanks again
Roman
this thread seems to be interesting for translate (google language tools don't work good enough):
http://bbs.hifidiy.net/thread-540709-1-1.html
http://bbs.hifidiy.net/thread-540709-1-1.html
T,
Get yourself a Vivaldi browser and in there, there is an option to translate from "any to any" language.
In this case, Simplified Chinese to English works reasonably well and is quite readable.
Vivaldi is a browser written by people from Telecom Norway who brought us the best browser ever, the Opera (after it was sold).
Originally the aim was to re-create best features of the Original Opera (which every other browser copied), but now, they - as they did before - invent all these new features for the competition to follow.
Cheers
Roman