Quote from: Roger100 on August 16, 2013, 04:19:52 AM

Did you change both R1 and R2 resistors?

Also, any detailed info you may give about the best way to desolder and solder the new crystals and resistors in would be hugely appreciated. What i really need to know is how much heat can these little crystals take?

I was using 280*C for hot air there are temperatures and times in the datasheet on what the crystals can handle.

Quote from: Dimrain13 on August 16, 2013, 04:18:32 PM

Quote from: Roger100 on August 16, 2013, 03:20:16 PM

Quote from: jshinra on August 16, 2013, 04:43:35 AM

So I went ahead and replaced R1 with the 1.2k Ohm resistor and put in a 16.384 MHz crystal and cgminer gives the error:

Code:

[2013-08-16 00:41:09] Icarus Detect: Test failed at /dev/ttyUSB2: get 00000000,
should: 000187a2

Any ideas? I'm not the best solderer but it looks like I have everything ok. Also tried flipping the oscillator in case that was it but same thing.

How are you now powering the usb miner? I believe that using a 16mhz crystal will require more power, hence you not being able to use it in a usb port anymore. You will have to hook it up (via the pads on the end of the miner board) to a pc power supply (or similar) equivalent that has a proper 5V connection with a decent amount of amps.

No thats just for the 20 and up. he should be good, not sure what wrong. did you use flux?

You have to use a external 5v supply for anything over the stock voltage, otherwise you will just see timeouts and errors from usb overcurrent. Thats why these were only built with a 12mhz crystal so that they meet usb spec.