It's quite possible that the AMTEL microcontroller IS INDEED the correct replacement for the original Motorola microcontroller: 68HC705. But, I am not sure 100%. You can research this by yourself.
It seems that the amp has a lot of issues... burnt tweeter is a dead giveaway. Maybe try to find someone who has some experience with electronics to fix it for you.
Replacing the capacitors will not cut it; you need proper gear (variac, tone generator, oscilloscope, capacitive || resistive loads combinations as bare minimum) to get that amp going again.
Good luck,
Nick
It seems that the amp has a lot of issues... burnt tweeter is a dead giveaway. Maybe try to find someone who has some experience with electronics to fix it for you.
Replacing the capacitors will not cut it; you need proper gear (variac, tone generator, oscilloscope, capacitive || resistive loads combinations as bare minimum) to get that amp going again.
Good luck,
Nick
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This one is clear and i thought i explained it already: the amp was imported from the US and in order to make it compatible with 50Hz mains the micro was replaced with an emulation. It does only basic housekeeping inside the amp and checks the frequency. If the amp powers up and the front indication works the Atmel does its job. Apart from impossible to replace, there is also no need. And yes, the Atmel clearly does not check the frequency anymore 🙂
The OP should find a qualified repairman rather than look for parts.
This one is clear and i thought i explained it already:
It seems that the amp has a lot of issues... burnt tweeter is a dead giveaway. Maybe try to find someone who has some experience with electronics to fix it for you.
Replacing the capacitors will not cut it; you need proper gear (variac, tone generator, oscilloscope, capacitive || resistive loads combinations as bare minimum) to get that amp going again.
I do not know where this amplifier comes from, but it is from the factory 220V 50-60Hz. I repeat, this chip works, but I want to remove this hand-made chip and put the native chip or its analog to solder it into the native circuit, and remove this red one. If you find a new chip or an analog, do you need to program it?
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I think if you get an Original Chip from Krell then there is nothing to program. Place it in the circuit and it will work, Usually the chips are Factory programmed..
Please tell me where you can find, buy the original chip? I don't even know where to find him. Can you help me find and buy a chip? Please🙂
I really want to find the original programmed chip. If I can't find it, I'll have to rewrite the program from the chip that is on another one. The chip that costs, it is larger in size from the original, so it was taken out for a separate fee
Original chip comes from Krell only. They may be willing to sell you a chip if the amp was originally meant for export. Or direct you to a dealer. Alternatives...lots of microcontrollers will work, Arduino too. Someone just needs to write a bit of code. But why do you need this information? It has nothing to do with the issues your amp is experiencing.
Do you know how to use Google? or are you just lazy?
Do you know how to use GOOGLE. I see you use the Russian Flag, are you in Russia, not able to use google.?
Contact – Krell
You see, easy things you should be able to take care by yourself.
All here are willing to help you, but you should also be willing to help yourself.
This is the minimum one can do.
Then number of the chip you find in the circuit manual, Extreme_Boky has uploaded for you-.
Do you know how to use GOOGLE. I see you use the Russian Flag, are you in Russia, not able to use google.?
Contact – Krell
You see, easy things you should be able to take care by yourself.
All here are willing to help you, but you should also be willing to help yourself.
This is the minimum one can do.
Then number of the chip you find in the circuit manual, Extreme_Boky has uploaded for you-.
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In Russia, everything is fine with Google))
I didn't ask you because I don't want to or because I'm lazy. Because you need to know where to look, maybe there are specialized sites that I can't find or don't know. The scheme that Extreme_Boky uploaded, I sent to the master, he did not have it.
Thank you for contacting Krell. I will write to them now.
I didn't ask you because I don't want to or because I'm lazy. Because you need to know where to look, maybe there are specialized sites that I can't find or don't know. The scheme that Extreme_Boky uploaded, I sent to the master, he did not have it.
Thank you for contacting Krell. I will write to them now.
Guys, hello again! I wrote a letter to krell twice, but received no reply. For obvious reasons (politics). I've solved all the problems with my amp. All that remains is to buy a pre-programmed chip for my KSA 300S amplifier (240V 50-60Hz). Can any of you help me with the purchase of a pre-programmed chip? Because they don't send or respond to my country. Name of the microcontroller Motorola XC68HC705P9P. Thanks
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Krell distributor in Russia:
International Dealers & Distributors – Krell
Alcom Incorporated
129 k.2, s.2 Varshavskoe shosse
Moscow, Russia 117545
Tel: 7-495-249-04-36
audio@alcom.ru
Главная - Alcom
... see if they can help..?
Try German distributor as well...
Good luck!
International Dealers & Distributors – Krell
Alcom Incorporated
129 k.2, s.2 Varshavskoe shosse
Moscow, Russia 117545
Tel: 7-495-249-04-36
audio@alcom.ru
Главная - Alcom
... see if they can help..?
Try German distributor as well...
Good luck!
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Dear Boky, the Russian distributor krell also does not answer, I called them, described my problem, sent an email. I don't know what to do. Maybe someone has the right programmed?
i'm fixing my Krell KSA-300s and wanted to know what upgrades or other changes i should do while i have the Amp apart? The Krell chip is v1.3 for example. i'm fixing the faceplate board which arced and burned the relays, caps and resistors. for example changing the Memcor 1200ohm 20w resistors for a modern metal cased resistor.
Thanks
Thanks
