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Author Topic: HELP Jalapeno USB connector fell off  (Read 2127 times)
bitpop
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September 04, 2013, 07:43:14 AM
 #1

I sold a jalapeno and it arrived there with the usb connector fallen off. I don't know how it happened.

Anyway, I got it back. When he first got it, it had great traces left. It seems the connector is soldered by the corners but the pins are just sprung down. I suggested he get it soldered. He took it to a computer? place instead of a real soldering place. The idiots destroyed what was left.

I wanted to solder just 2 wires from the board to the connector but they destroyed one of the important traces.

Anyone have any suggestions?? Can I use it through jtag or xchain? Anyone want to salvage the chips?

It was fixable:



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MRKLYE
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September 04, 2013, 07:51:13 AM
 #2

Need a hot air surface solder device!
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September 04, 2013, 08:13:35 AM
 #3

Try scraping away some of the soldermask from the traces to expose the copper. Or, solder the wires directly to the FTDI chip (Pin 6 = D-, Pin 7 = D+). You'll want to at least connect the GND pin to the connector also.
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September 04, 2013, 08:14:58 AM
 #4

Theres no way I'm getting at those ftdi pins.

Do you think the trace starts at the top or bottom?

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September 04, 2013, 08:17:26 AM
 #5

Maybe, Can you point out pin 6 and 7? I only need one. The other and ground I can get with the traces.

This may not work though. They may have inline resistors.

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September 04, 2013, 08:45:07 AM
 #6

Doesn't look like there are any traces on the top layer, they may be on the bottom.

Pin 6 and 7 on the ftdi chip are facing the edge of the board. The pad on the very left on the side facing the board edge is pin 1 (this is shown on the chip with a dot in the corner). The pad to the right of that one is pin 2 and so on. You'll want to do a continuity test with a multimeter to make sure they are the right pins.

There does not appear to be any inline resistors.
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September 04, 2013, 09:20:39 AM
 #7

Ok I wish I could solder to a resistor.

Can you open https://forums.butterflylabs.com/attachments/announcements/1328d1371408270-bitforce-sc-pcb-schematics-mainpcb.zip
And double check? I can't find altium designer viewer.

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September 04, 2013, 12:01:11 PM
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Are you in Texas?

Looking to review Bitcoin / Crypto mining Hardware.
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September 04, 2013, 12:05:21 PM
 #9

No west

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September 04, 2013, 12:05:57 PM
 #10

There's no way I'm soldering the ftdi chip. anyone want this thing?

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September 04, 2013, 12:08:18 PM
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There's no way I'm soldering the ftdi chip. anyone want this thing?
How much do you want for it?

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bitpop
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September 04, 2013, 12:12:07 PM
 #12

Maybe $500 half price

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September 04, 2013, 01:31:47 PM
 #13

Ouch... someone might want to call Rodney Copperbottom to help.

No electronics fix it places near buy to pop that back on with heat gun?

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September 04, 2013, 01:42:15 PM
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Ouch... someone might want to call Rodney Copperbottom to help.

No electronics fix it places near buy to pop that back on with heat gun?

it looks like the "repair guys" delaminated the traces and the mechanical support pads.

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September 04, 2013, 02:26:59 PM
 #15

That was an easy fix before it was butchered and had the pads ripped off..

It's hard to look at.

I would guess your options are to

1. Try to get a repair from BFL
2. try to solder wires to where the usb pins go to-- onto the side of whatever tiny SMD resistor or cap... not going to be fun.
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September 04, 2013, 02:33:16 PM
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I would buy it to fix it, but saying $500 is "half price", you might want to check the real market, seeing how some are going for 2.5-4 BTC, and consdering this a damaged unit, with even further damage done while trying to fix it... If you care to be reasonable about what you're asking for it (if you want to sell it), send me a message -- I wouldn't go by eBay prices

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September 04, 2013, 02:37:12 PM
 #17

Sure I'll auction here soon starting at 2 btc

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September 04, 2013, 03:18:14 PM
 #18

Note to self: Be extra careful not to jam the USB cable into something while it's connected to the Jally.

So far I've never had this happen to me yet, and I've mined with tons of naked FPGA boards.

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September 04, 2013, 03:19:53 PM
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Note to self: Be extra careful not to jam the USB cable into something while it's connected to the Jally.

So far I've never had this happen to me yet, and I've mined with tons of naked FPGA boards.

That style of smd usb mini connector is entirely too fragile... that's not the first instance I've seen of such a failure.

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September 04, 2013, 03:31:17 PM
 #20

It's bull. Something like that must be through hole.

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