Samaudio
Everything is being run my a microcontroller, thats why they have a bootprom (I believe). So input selection, volume etc..
Everything is being run my a microcontroller, thats why they have a bootprom (I believe). So input selection, volume etc..
Good evening! Thank you for this answer, but I do not understand it well !
Can you explain?
Are the EEPROM data they significant?
Many thanks for your help !!
Sam🙂
Can you explain?
Are the EEPROM data they significant?
Many thanks for your help !!
Sam🙂
Not sure if this is a correct description (somebody may be able to explain it better) but think of it as pc without the OS. You can turn it on, but are not able to do anything at all. Pretty clever way of protecting a product from cross border imports..
....earlier on the ps audio ps300 was suggested as a solution.......there is no chance that it is able to supply a krell poweramp, it's only good for 300 watts.
it's only able to supply a cdplayer and a preamp and no more.......
it's only able to supply a cdplayer and a preamp and no more.......
TBLA
When I suggested it, it was for a cd player - not a power amp. All though PS audio makes bigger powerplants, I think the added cost makes it a better deal to pay for the conversion..
When I suggested it, it was for a cd player - not a power amp. All though PS audio makes bigger powerplants, I think the added cost makes it a better deal to pay for the conversion..
to
dear sir,
i gathered that you have done an oscilloscope for a few of your friends. can you tell me are the tracks in the same general location? ie is it near the microcontroller or near the transformer?
is there a specific number for the track? thanks
i have attached some pics of my eeprom
dear sir,
i gathered that you have done an oscilloscope for a few of your friends. can you tell me are the tracks in the same general location? ie is it near the microcontroller or near the transformer?
is there a specific number for the track? thanks
i have attached some pics of my eeprom
Attachments
chalky said:
The switches changes the main wiring of the transformer. If they are wrongly set and the amplifier is switched on, the amp receives the wrong voltage and something will surely get fried very badly.
Some more recent versions of Krell amps can operate at both frequencies. It seems all models originally produced for the european market fall into this category.
Re: Re: Re: Need Help !
Am not 100% sure but it seems to contain a few configuration parameters since a few address locations in eeprom space is referenced from the firmware. I think it's only like 6 bytes or so.
samaudio said:
Am not 100% sure but it seems to contain a few configuration parameters since a few address locations in eeprom space is referenced from the firmware. I think it's only like 6 bytes or so.
Re: to
Am a bit confused; you're interested in checking if a different device uses the same method of frequency check to limit operation at 50Hz? Can you shared with us what device it is?
What you will need to do is to check with an oscilloscope if any of the pins on the mcu carries something resembling a 50 or 100 Hz signal. If you look at my original discovery post at page 13, you'll see that for the 300iL, it's pin 31.
james559 said:
Am a bit confused; you're interested in checking if a different device uses the same method of frequency check to limit operation at 50Hz? Can you shared with us what device it is?
What you will need to do is to check with an oscilloscope if any of the pins on the mcu carries something resembling a 50 or 100 Hz signal. If you look at my original discovery post at page 13, you'll see that for the 300iL, it's pin 31.
to iampivot
actually my query was directed at philbyx. coz he mentioned that he has done the voltage mod for a few different units of krell by constructing the nand gates.
so i like to check with him if the track which he did the mod on(ie which detect the 60hz signal) is indentical across the different units.
you mean you did the mod too? and its done on pin 31 leading to the motorola microcontroller? not on the eeprom?
if u see my 1st pic, the eeprom containing the sofware version is above the microcontroller
😕
actually my query was directed at philbyx. coz he mentioned that he has done the voltage mod for a few different units of krell by constructing the nand gates.
so i like to check with him if the track which he did the mod on(ie which detect the 60hz signal) is indentical across the different units.
you mean you did the mod too? and its done on pin 31 leading to the motorola microcontroller? not on the eeprom?
if u see my 1st pic, the eeprom containing the sofware version is above the microcontroller
😕
Hello !
Is anybody can supply me the data to write in the EEPROM memory of the Krell 400 XI 68HC711E9 ??
Many thanks for your Help !!
Samuel
Is anybody can supply me the data to write in the EEPROM memory of the Krell 400 XI 68HC711E9 ??
Many thanks for your Help !!
Samuel
FPB-200
I live in the US and have a FPB-200. I am now moving to Bangladesh and I will bring the Krell.
I also wentg the firmware patch route the code in my 68HC711E9 was slightly different. I had version 1.16 60Hz.
I hope my Krell will work when I get to Bangladesh.
I live in the US and have a FPB-200. I am now moving to Bangladesh and I will bring the Krell.
I also wentg the firmware patch route the code in my 68HC711E9 was slightly different. I had version 1.16 60Hz.
I hope my Krell will work when I get to Bangladesh.
Code:
Second_function_call
0400: D394 CE1000 LDX #$1000 Set index X to register base
0401: D397 8655 LDAA #$55
0402: D399 A73A STAA $3A,X Arm the COP timer clearing mechanism
0403: D39B 86AA LDAA #$AA
0404: D39D A73A STAA $3A,X Clear the COP timer
0405: D39F 18CE0000CE LDY #$0000 clear 16 bit index register Y
0406: D3A3 1E0002FC BRSET $00,X,%00000010,$D3A3 Stay at this address while 1st bit is set in Port A
0407: D3A7 1F0002FC BRCLR $00,X,%00000010,$D3A7 Stay at this address while 1st bit is clear in Port A (wait a full cycle )
0408: D3AB 180808 INY increase Y
0409: D3AD 01 NOP delay
0410: D3AE 01 NOP delay ( I think this is done to not have an overflow in Y and to debounce the cycle switch)
0411: D3AF 1E0002F8 BRSET $00,X,%00000010,$D3AB jump back if the cycle has not changed to increase y
0412: D3B3 180808 INY increase Y
0413: D3B5 01 NOP delay
0414: D3B6 01 NOP delay ( I think this is done to not have an overflow in Y and to debounce the cycle switch)
0415: D3B7 1F0002F8 BRCLR $00,X,%00000010,$D3B3 Jump to increase Y as long as cyckle hasn't changed
0416: D3BB 188C09238C CPY #$0923 At this point Y contains a relattive value of the duration for one cycle period its compared to #$0923
0417: D3BF 2201 BHI $D3C2 Branch if Y > $D3C2 i.e jump if less then 60Hz
0418: D3C1 39 RTS
0419: D3C2 0F SEI enble interrupt
0420: D3C3 8655 LDAA #$55
0421: D3C5 A73A STAA $3A,X Arm the COP timer clearing mechanism
0422: D3C7 86AA LDAA #$AA
0423: D3C9 A73A STAA $3A,X Clear the COP timer
0424: D3CB 20F5 BRA $D3C2 Branch always to D3C2 loop here infitely or a bugg occurs that enebles the COP reset.Hi
I have a Krell KSA50S and i have SW1=1 Open and 2 open
SW2=2? or 1 and it work on 110 50HZ(in live in europe and i use a big transformer 230>110)
I don't have a SW3
What is the modification for 230V 50HZ please?
Thanks you
Coronado
I have a Krell KSA50S and i have SW1=1 Open and 2 open
SW2=2? or 1 and it work on 110 50HZ(in live in europe and i use a big transformer 230>110)
I don't have a SW3
What is the modification for 230V 50HZ please?
Thanks you
Coronado
What kind of microcontroller does it have? It might need som patched software to workaround the '60Hz bug'.
In the FPB-200 it was a motorola/freescale MC68HC711E9CFN2. It might be different between series and models.
/// Carl
/// Carl
samaudio said:
If you have the amp then you already have the data, you just read it out from the existing microcontroller in the amp.
Help me please.coronado2048 said:Hi
I have a Krell KSA50S and i have SW1=1 Open and 2 open
SW2=2? or 1 and it work on 110V 50HZ(in live in europe and i use a big transformer 230>110)
I don't have a SW3
What is the modification for 230V 50HZ please?
Thanks you
Coronado
Hi
thanks you for your help.
I take a picture but my APN is bad.
PIC 0192: Powerplug black is Line and white is Neu.(neutre)
http://img433.imageshack.us/img433/3985/10001923pw.jpg
0194: left is switch2 in postion: UP(no label) or down(postion 1).
rigth is switch 1(clip1 in position 1 and clip2 is position2)You have a choice :for clip1 postion 1 or postion OPEN.
And for clip2 ,position 2 or OPEN.
Switch 1:
clip1 clip2
------------------
- * - * -
- - -
- - -
- - -
- - -
- - -
-------------------
OPEN
http://img352.imageshack.us/img352/5189/10001947mn.jpg
PIC 196:Transofrmer to switch card. LEFT to right is: Black,White,Big Black,brown,orange,Big Grey,Black,Withe.
http://img171.imageshack.us/img171/108/10001962nq.jpg
PCI:198: Transformer to amplifier card channel left.Up to Down is :Grey,blue,yellow,red
Channel right Up to Down :red,yellow,blue,Grey.
http://img132.imageshack.us/img132/440/10001986xe.jpg
ouch.
thanks you for your help.
I take a picture but my APN is bad.
PIC 0192: Powerplug black is Line and white is Neu.(neutre)
http://img433.imageshack.us/img433/3985/10001923pw.jpg
0194: left is switch2 in postion: UP(no label) or down(postion 1).
rigth is switch 1(clip1 in position 1 and clip2 is position2)You have a choice :for clip1 postion 1 or postion OPEN.
And for clip2 ,position 2 or OPEN.
Switch 1:
clip1 clip2
------------------
- * - * -
- - -
- - -
- - -
- - -
- - -
-------------------
OPEN
http://img352.imageshack.us/img352/5189/10001947mn.jpg
PIC 196:Transofrmer to switch card. LEFT to right is: Black,White,Big Black,brown,orange,Big Grey,Black,Withe.
http://img171.imageshack.us/img171/108/10001962nq.jpg
PCI:198: Transformer to amplifier card channel left.Up to Down is :Grey,blue,yellow,red
Channel right Up to Down :red,yellow,blue,Grey.
http://img132.imageshack.us/img132/440/10001986xe.jpg
ouch.
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