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Need help troubleshooting 3" Happ Trackball

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nickbuol:
Ok.  Below are the pictures.  Board "1" is the first one in line from the USB/PS2 plug, board "2" is on the end (farthest from the USB/PS2 cable) and plugs into board "1"...

Kind of like this...

CABLE ---- Board 1 ---- Board 2

They show a copyright of 2001, but I bought this trackball new from Ponyboy here in July 2005.

Board 1 (PN 55-0301-00) front and back:



Board 2 (PN 55-0302-00) front and back:



rescue161:
Can you give me the numbers of of U1 (the chip) and if there are any, the numbers off of each of the optocouplers?

I'll look up what the chip actually does so we can get some proper voltage readings.  Those optocouplers have an LED inside of them that will drop some voltage ~1 to 2 volts.  I wouldn't imagine that both would go bad at the same time, especially with them being on different boards.  That's why I'm suspecting the chip.  Depending on what it is, they can be pretty cheap.  Soldering on the other hand can be tricky on a double-sided board like that if you've never done it before.

Get me the numbers and I'll get you the voltage readings that you're suppose to have.

Edit:  I forgot to ask if there is voltage on the red wire (V+).  With it plugged in, measure across the black wire (G) and the red one (V+) and tell me what you're getting.

nickbuol:
OK.  Let me take a shot at this:


The optical sensors are both ALPR0J0001-HC

Oh, and I get 5 Volts (4.999) on the V+ and G wires when plugged in to the board (and USB obviously)

rescue161:
I can't seem to find any info on the chip.  The 6.00L4P is a crystal.  Those rarely bite the dust, but it's possible.  I wish I could at least get a schematic of the chip that you have so I could at least come up with the voltage readings that you should be seeing.

nickbuol:
I had emailed the folks that are selling the boards and cables as a kit, and they would sell the boards for $28 total shipped to my door, so I always have that as an option too.  That is a little more reasonable of a cost than $48...  I would still love to try to fix this, but who knows if that is possible... 

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