Lavry Gold MkII Schematic??? Anybody???

[Andy Peters]

The benefits of reduced operating temperature are even lower distortions over the whole frequency range as well as increased flexibility in mounting and range of ambient operating temperatures."

The main benefit of reduced operating temperature is that the digital stuff doesn't go wonky. Without proper heat management, that DSP will fall down. Not long ago, I was bringing up a 16-channel ADC board (not for audio) which had two Xilinx Spartan-6 FPGAs on it, and without heatsinking and airflow, those FPGAs would stop working in short order.

-a

 

[drpat]

The one that reads "DSP56002FC66" looks slightly dis colored, like it may have undergone some heat damage.

Good luck finding those. We (day job) used to use a whole bunch of those Motorola DSPs back when, and the whole line was EOLed a couple of years ago.

-a

This part can still be found for a reasonable price

Without the binary design file used to burn the PAL, replacing the part won't help.

And TI is out of the PAL business. You might get lucky with Lattice.

-a

I'm assuming the "PAL" chip is different from the DSP56002FC66

 

[drpat]

The benefits of reduced operating temperature are even lower distortions over the whole frequency range as well as increased flexibility in mounting and range of ambient operating temperatures."

The main benefit of reduced operating temperature is that the digital stuff doesn't go wonky. Without proper heat management, that DSP will fall down.

I'm calling BS on Lavry's marketing hype. I think it serves two purposes...

1. Damage control to make people think that MKII Lavry AD122-96 units never had a heat issue

2. To give the appearance of a "new and improved" AD122-96... We (Lavry) reduced the operating temperature to reduce distortion and to give you more freedom to not have to mount the units vertically and you can now use our (Lavry) converters in non arctic regions of the world. Aren't we (Lavry) nice!

 

[radardoug]

Lavry, a ******** and jellybeans company.

Please dont support them.

 

[Gus]

Hopefully the heat did not erase the EPROMs
If you can find the DSP chip. I would find someone that can rework the board.

The issue is it might fail again
Is there any kind of enclosure around the clock crystal?
I think it will need to have some kind of cooling.

In the past PC builders that overclocked their systems would sometimes use chip heatsinks on the main board and  the graphics RAM chips. 
Even if you heatsink the chip(s) you will need to get some of the heat out the enclosure
Removing heat and keeping the crystal stable might be a concern.

 

[drpat]

Hopefully the heat did not erase the EPROMs
If you can find the DSP chip. I would find someone that can rework the board.

There are quite a few available on The Bay. They're all from china, so I'll order from a couple different venders just to be safe.

Is there any kind of enclosure around the clock crystal?

There is no enclosure around the clock crystal.

 

[home_listening]

I would try spraying around with a can of 'freeze spray' like super cold 134

 

[drpat]

I would try spraying around with a can of 'freeze spray' like super cold 134

I could do that, but the problem is immediate, from a dead cold start. I think the heat completely obliterated whatever part is causing the problem.