New 4.3 build - No connection to PCB - AVR Fuses Error

[BrianL_STL]

Howdy,

Before I even get started asking for help just wanted to say thanks for this board and the HeaterMeter, such a cool project and tool. I've learned a lot just reading this board.

So I got my HeaterMeter going today after receiving my Pi3, but I am having some issues I'm hoping someone can assist with. I was able to boot the pi and connect just fine, once I got into the openWRT config the LinkMeter config showed a serial connection error and the LCD is blank (but has power/lights up). Flashing firmware gives the following output:

Stopping LinkMeter nil poll

LinkMeter platform is BCM2709
Loading SPI modules...
AVR fuses ERROR

Starting LinkMeter nil poll

After detaching everything, I cleaned the boards with alcohol and a toothbrush then inspected all the solders, I did not see any issues, although I am a novice with boards/soldering (my pops actually did the soldering).

I pulled out my meter and have been checking connections, the big thing I've noticed is the microcontroller solders have no voltage, but I cannot determine where the problem is. For example, looking at these schematics - http://heatermeter.com/devel/pcb/hm-4.3/HeaterMeter433BaseV.png, placing my meter on GND and VCC of the microcontroller i get 0 volts, as well as any other pad that should have 3.3V, the only thing that registers is the TX pad around 3V. Seems like I have 5/12v everywhere, but nothing has 3.3v.

Here are the best shots I can get of the boards.

http://imgur.com/a/mxILo
http://imgur.com/a/0PtLL

Any help you guys can give would be awesome, really want to get this up and running so I can get some nice smokes going.

TY, Brian

 

[John Bostwick]

Some of the soldering look like you need to take the soldering iron back over them and reflow the solder a bit. There may be some shorts on a couple of solder joints, buts kinda hard to see with the pictures provided.

Post a picture of component side of the board.

 

[BrianL_STL]

Some of the soldering look like you need to take the soldering iron back over them and reflow the solder a bit. There may be some shorts on a couple of solder joints, buts kinda hard to see with the pictures provided.

Post a picture of component side of the board.

I don't doubt it, he soldered it with a gun and tin from 1955, I may go back with a different gun and new tin. Sorry for the pics, the 6p doesn't do well with macro shots.

But I'm pretty sure I found the issue, I have a BS170 where a MCP1700-33 should be, looks like I was shipped with 4 BS170's and no MCP1700-33. Hopefully i can find parts locally since shipping will be $10 for a .40c part.

 

[Steve_M]

I had a look at your pics and you do have 5 x "3 pin" components installed. 4 on the main board and 1 on the LCD board. My guess is that one of those is the MCP1700-33. Might need a magnifying glass to tell which one is which.

An easy fix is to temporarily use the 3.3v supply from the raspi and order MCP1700-33 from somewhere cheap like ebay or track down a local(ish) electronics store.

Here's where the jumper should go

 

[BrianL_STL]

I had a look at your pics and you do have 5 x "3 pin" components installed. 4 on the main board and 1 on the LCD board. My guess is that one of those is the MCP1700-33. Might need a magnifying glass to tell which one is which.

An easy fix is to temporarily use the 3.3v supply from the raspi and order MCP1700-33 from somewhere cheap like ebay or track down a local(ish) electronics store.

Here's where the jumper should go

Ya it's there, but it's def a BS170, got my glasses out . Thx for the workaround, i'll give that a try.

Edit:

Whoops, just read that again and see what you're saying, looks like the MCP1700-33 is on the LCD board, so hopefully easy swap and fix. Nice catch!