Voting resources, early voting, and poll worker information - VOTE. ... Adafruit is open and shipping.
0

Ice Tube Clock controller chip seems dead
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Ice Tube Clock controller chip seems dead

by jayphantom on Sun Feb 16, 2014 4:59 pm

Hello. I purchased an Ice Tube Clock kit from Makershed, http://www.makershed.com/Ice_Tube_Clock ... mkad16.htm

I followed the instructions provided on the adafruit site, and at first it was working, albeit with a bit of a missing digits problem. It beeped a couple of times and voltage was good on D3, 57.3 vdc. The third time I turned it on, it did not beep. I checked my solder joints, and tested voltage again, this time at D3 it was 8.17 vdc. It continued to not beep, and show low voltage on D3 from that point on. I also followed the troubleshooting guide and same issue. I think my controller chip is bad. Pictures included.

Thanks!
Attachments
DSCN1603.jpg
DSCN1603.jpg (57.31 KiB) Viewed 806 times
DSCN1602.jpg
DSCN1602.jpg (57.67 KiB) Viewed 806 times
DSCN1600.jpg
DSCN1600.jpg (53.58 KiB) Viewed 806 times

jayphantom
 
Posts: 6
Joined: Sun Feb 16, 2014 4:52 pm

Re: Ice Tube Clock controller chip seems dead

by adafruit_support_rick on Mon Feb 17, 2014 10:28 am

I'm checking with someone who knows more about the ice-tube. But meanwhile, these solders look a bit dodgy in the picture. You might want to touch them up.
dodgy.png
dodgy.png (259.08 KiB) Viewed 787 times

adafruit_support_rick
 
Posts: 35095
Joined: Tue Mar 15, 2011 11:42 am
Location: Buffalo, NY

Re: Ice Tube Clock controller chip seems dead

by Russell 27 on Thu Feb 20, 2014 12:47 pm

HEY jayPhantom

You ever get your clock squared away?
Russell 27
 
Posts: 240
Joined: Thu Sep 12, 2013 3:59 pm

Re: Ice Tube Clock controller chip seems dead

by jayphantom on Sat Feb 22, 2014 1:46 am

Sorry Russell, was out of town. I'm gonna redo those joints tomorrow.

I'm pretty sure its the controller chip tho, because I was getting beep and good voltage prior to my diagnostics on the missing digits. Then it stopped giving good voltage all of a sudden, and no beep. I will repost pics of the board with touched up solder joints. Thanks for your time on this.

jayphantom
 
Posts: 6
Joined: Sun Feb 16, 2014 4:52 pm

Re: Ice Tube Clock controller chip seems dead

by Russell 27 on Sun Feb 23, 2014 11:30 am

DSCN1600.jpg
DSCN1600.jpg (49.32 KiB) Viewed 740 times


I marked out the pins. Pin 11, 14, 19, 21 don't appear to have much connection. The arrow points to what looks like a bridge. Pin 11 and 14 connect to switch 1 and 2. Pin 19 connects clock out to Maxim chip, important but not your issue. Pin 21 is AREF +5 Vcc Rail connection. This may be part of the problem. Pin 20 is a ground, and pin 12 oscillates , IRFD110 (Q2), the MOSFET that switches the inductor to make boost voltage. You could also check for Vdd on pin 7 and ground on pin 8. You can never be 100 percent on a connection until tested with a meter, either voltage or continuity.
Russell 27
 
Posts: 240
Joined: Thu Sep 12, 2013 3:59 pm

Re: Ice Tube Clock controller chip seems dead

by jayphantom on Thu Feb 27, 2014 9:59 pm

I shored up the solder joints indicated, and retested. Same results as previously reported. Here are pictures. The joint you indicated as being joined, was not. It was a play of the light, and the PCB resin. Here are new pics.

Thank you all for your time on this,

Jason
Attachments
photo.jpg
photo.jpg (631.31 KiB) Viewed 701 times
photo (1).jpg
photo (1).jpg (491.48 KiB) Viewed 701 times

jayphantom
 
Posts: 6
Joined: Sun Feb 16, 2014 4:52 pm

Re: Ice Tube Clock controller chip seems dead

by adafruit_support_bill on Fri Feb 28, 2014 6:41 am

All the soldering related to the processor looks good. Let's try replacing the processor. If you contact support@adafruit.com with a link to this thread we can get one out to you.

adafruit_support_bill
 
Posts: 78986
Joined: Sat Feb 07, 2009 10:11 am

Re: Ice Tube Clock controller chip seems dead

by jayphantom on Fri Mar 07, 2014 2:42 pm

So I replaced the chip, and ended up with my original problem. I took a video so you could see what happens better than I could explain it. Let me know what you think.

http://www.youtube.com/watch?v=Rr4NWlETAIc

Thanks,

J

jayphantom
 
Posts: 6
Joined: Sun Feb 16, 2014 4:52 pm

Re: Ice Tube Clock controller chip seems dead

by adafruit_support_bill on Fri Mar 07, 2014 2:53 pm

That looks like the 'fading digits' problem. Most likely due to a bad Q3 MOSFET. If you contact support@adafruit.com with a link to this thread, we can get a new one out to you.

We tend to see more of these issues in the winter. We suspect that it may be due to the increased risk of static damage to the sensitive MOSFET device. Try to work with all parts on an anti-static surface and ground yourself to it before handling the MOSFET.

adafruit_support_bill
 
Posts: 78986
Joined: Sat Feb 07, 2009 10:11 am

Re: Ice Tube Clock controller chip seems dead

by jarchie on Fri Mar 07, 2014 4:52 pm

I agree with Bill, but also think that the last digit is a bit dimmer than the others.

In a recent thread, both issues are discussed and resolved by replacing Q3 with a ZVP2110A from Digi-Key. Another other option is to replace Q3 with a PN2907 and resistor, which should also solve both problems.
--John <www.jarchie.com/email>

jarchie
 
Posts: 595
Joined: Sun Jun 24, 2012 2:16 pm
Location: Santa Cruz, California, United States

Re: Ice Tube Clock controller chip seems dead

by Russell 27 on Fri Mar 07, 2014 5:18 pm

One thing you should try; is jumpering the two outside pins of the MOSFET together. If your Tube does not light up fully, the problem lies else ware.

MOSFET JUMPER.png
MOSFET JUMPER.png (6.16 KiB) Viewed 648 times
Russell 27
 
Posts: 240
Joined: Thu Sep 12, 2013 3:59 pm

Re: Ice Tube Clock controller chip seems dead

by jayphantom on Mon Mar 10, 2014 11:50 pm

Thank you both for your replies. I think I may have a PN2907 laying around. I will breadboard it. If that doesn't work then I will try the alternative mosfet.

jayphantom
 
Posts: 6
Joined: Sun Feb 16, 2014 4:52 pm

Re: Ice Tube Clock controller chip seems dead

by jarchie on Tue Mar 11, 2014 12:21 am

jayPhantom wrote:Thank you both for your replies. I think I may have a PN2907 laying around. I will breadboard it. If that doesn't work then I will try the alternative mosfet.

If a PN2907A+resistor doesn't work, the ZVP2110A probably won't either. The only advantage of the ZVP2110A over the PN2907A+resistor is that the ZVP2110A eliminates the need for a resistor.

Rather than trying the PN2907A straight off, I recommend doing as Russell suggests: jumper the outer pins of Q3 (more details here here). If jumpering the outer pins fixes the display, then replacing Q3 with a PN2907A+resistor or ZVP2110A should solve your problem. In my opinion, both solutions are equally good.
--John <www.jarchie.com/email>

jarchie
 
Posts: 595
Joined: Sun Jun 24, 2012 2:16 pm
Location: Santa Cruz, California, United States

Please be positive and constructive with your questions and comments.