Post
Topic
Board Mining (Altcoins)
Re: GridSeed 5-chip USB miner voltage mod
by
amix
on 28/04/2014, 13:43:26 UTC
I could screw up any mod  Smiley I bet.  Sorry ZiG - I'm not blaming you at all.  I did the first pod and it has run for several days.
Re: C35 - the clicking came before accidentally bridging that.  I took photos and planned to post them. It looked good from several angles.
I suspect the clicking has to do with me making a poor solder connection, maybe even up at con3.  The bridge to C35 came at a later attempt.  I was so surprised that I did it and even more surprised that I didn't notice it before testing the pod.

Looking at the brd file:
R46 Pin 1  goes something referenced N31930727 on the board
R46 Pin 2 goes to DGND

C35 Pin 1 goes to N31930727
C35 Pin 2 goes to N31930664

It looked like the short went from pin 1 to pin 1. The components are tiny so maybe I shorted C35 itself.

I also started the pod at 1200MHz - I feel kind of dumb admitting that.
I had to post my failure.  I want to focus on fixing it if I can.  Turn a negative into a positive.

ZiG - Can we put a resistor between Con3 pin3 and C38 pin1 or C40 pin1 or C41 pin1 or C43 pin1?  

Thank Amix for the helpful advice.  I'll focus on cleaning the pins for now.  The underside is clean.  

Any, all suggestions, tips, advice for what to do and what to check are welcome.

Check your crystal!!! just inspected mine and found a small dent in the top - caught possible from when fitting the top and maybe overtighted a bit too much. the dent fits exactly where the edge of the central heatsink block is. darn it. time to get the drimmel out again. hopefully it aint damaged it too much. oh well looks like crystal swap is in the pipline - upgrade the crystal anyone? thinking maybe a 33mhz in there Wink.

the frequency wont have fried it i had mine at over 2200MHZ back in the ealry days of this thread - got too many hadware errors though!

Oh something of importance :i just plugged my new gridseed into a 5v yes thats right 5v power supply.i had one laying around and was just about to chop the barrell connector off it when i had the idea. guess what its running fan going and its hashing away. i set it low so its hashing at 650mhz wiht the autotunne cpuminer so lets see how it goes. looks promising certainly for cutting the wattage down at any rate! 24hr from now ill be overclocking it.