Thanks for the info.
Did you use bootsrtap mode for both downloading and uploading (burning) data from the MCU with jbug11 ?
Did you use bootsrtap mode for both downloading and uploading (burning) data from the MCU with jbug11 ?
Anyone found the way to get Krell Showcase Processor working on 230/50HZ ? I have used a transformer to 110V but when power on, the unit said AC Line error. So it should be the frequency lock, right ?
Any help would be appreciated.
Any help would be appreciated.
Hi Tor,
Thanks for reply. My unit is exactly the same as the photos posted by PS_Norway (same chip number as well) just different the third line (not sure, I'll check if you need it) i.e :
MC68HC16Z1VFC16
OH35S
ABCDXXXX1234
I managed to find the way to configure the wire connection to power up at 240V but don't know how to change it to 50HZ though...
If you can help me step by step how to do that, I'm really happy to donate a bit of cash for you to do further research and development 🙂 instead of paying it for those greedy dealers here....
I've also sent email to Krell to feedback about this problem as well, because by the time I bought the unit, I checked it carefully and it did has the label 50/60HZ right under power button at the back at the unit. It means it should work on any frequency though... Otherwise it's a very wrong information for customer and Krell needs to do something about that. It like you buy a brandname car and on the gas tank it says using premium unlead/Unlead (premium recommended). So what the driver would think when he fill up with unleaded petrol and it does not run !!!!
Thanks for your help. If you need more detail and photos, let me know and I can send them to you.
Thanks for reply. My unit is exactly the same as the photos posted by PS_Norway (same chip number as well) just different the third line (not sure, I'll check if you need it) i.e :
MC68HC16Z1VFC16
OH35S
ABCDXXXX1234
I managed to find the way to configure the wire connection to power up at 240V but don't know how to change it to 50HZ though...
If you can help me step by step how to do that, I'm really happy to donate a bit of cash for you to do further research and development 🙂 instead of paying it for those greedy dealers here....
I've also sent email to Krell to feedback about this problem as well, because by the time I bought the unit, I checked it carefully and it did has the label 50/60HZ right under power button at the back at the unit. It means it should work on any frequency though... Otherwise it's a very wrong information for customer and Krell needs to do something about that. It like you buy a brandname car and on the gas tank it says using premium unlead/Unlead (premium recommended). So what the driver would think when he fill up with unleaded petrol and it does not run !!!!
Thanks for your help. If you need more detail and photos, let me know and I can send them to you.
Krell avs
Hi, I have the problem of the chip in krell audio video standard.
Anyone can help me?
Is my first post, sorry if I have committed some error.
Thanks.
Hi, I have the problem of the chip in krell audio video standard.
Anyone can help me?
Is my first post, sorry if I have committed some error.
Thanks.
The same procedure applies;
1. identify the microcontroller, eg. take a photo of the PCB and post here.
2. find out how to connect to the microcontroller with a PC in development mode.
3. disassemble the microcontroller code to find the code preventing operation
4. burn path into microcontroller.
Step 2 - 4 requires a steady hand with development tools and some knowledge about electronics, so I'd recommend getting some help from people "in the know".
1. identify the microcontroller, eg. take a photo of the PCB and post here.
2. find out how to connect to the microcontroller with a PC in development mode.
3. disassemble the microcontroller code to find the code preventing operation
4. burn path into microcontroller.
Step 2 - 4 requires a steady hand with development tools and some knowledge about electronics, so I'd recommend getting some help from people "in the know".
Re: Krell avs
Email to this guy ybs274321@gmail.com, he'll help you out.
These answers overhere aren't help much for newbies.... and they don't really wanna help anyway....
MaxKrell said:
Email to this guy ybs274321@gmail.com, he'll help you out.
These answers overhere aren't help much for newbies.... and they don't really wanna help anyway....
The chip is a plain EPROM chip, and it is possible to read out the content of this one if you have a small EPROM programmer.
Is there any other chips on the PCB? Can you provide a overview photo of the inside of the case?
Is there any other chips on the PCB? Can you provide a overview photo of the inside of the case?
The microcontroller is probably the square one in the upper right corner, sitting in its own socket. Can you post a close up photo of it?
Yes, that's the microcontroller, an MC68HC11F1CFN3. I think that one is similar to the one in the 300iL, except that it doesn't have any internal (E)PROM, thus the external one you've posted pics of previously.
I think the easiest path forward is to get the data off the eeprom, then get the program disassembled using a 68hc11 disassembler. That would allow you to find the entry point where the code needs to be patched. jbug11 is such a disassembler. You can probably find an eeprom programmer on ebay.
I can't really support you on getting the data off the eprom into your computer, or programming it, as I've never done this myself. Time to call in your local electronics guy.
I think the easiest path forward is to get the data off the eeprom, then get the program disassembled using a 68hc11 disassembler. That would allow you to find the entry point where the code needs to be patched. jbug11 is such a disassembler. You can probably find an eeprom programmer on ebay.
I can't really support you on getting the data off the eprom into your computer, or programming it, as I've never done this myself. Time to call in your local electronics guy.
Hello iampivot,
I have a Krell SACD Standard, and it only work in 60Hz. I've just aske my friend to read data from 68HC711E9CFN2. And I attached this file to my post. Could you help me to patch this. Many thanks!
I have a Krell SACD Standard, and it only work in 60Hz. I've just aske my friend to read data from 68HC711E9CFN2. And I attached this file to my post. Could you help me to patch this. Many thanks!
Sorry, I can't attach file. Could you PM me your email, I'll send the code to you.
Thanks again!
Thanks again!
I've just uploaded the file to mediafire. Here is the link:
http://www.mediafire.com/?eigpsexjh1h
Please help me to patch this, mr iampivot. Many thanks.
http://www.mediafire.com/?eigpsexjh1h
Please help me to patch this, mr iampivot. Many thanks.
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