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Channel 3 not working


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I just finished and tested my first 16 channel PC board. 15/16 channels worked. So I re-touched all of the joints to re-flow them and channel 3 is still not working.

I do not do electronics so what do I need to try and Ohm or Volt out?



Thanks,

Chris

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How is Channel 3 not working? Not turning on? Not turning all the way off?

Is the Opto in correctly? The opto is the 6 pin chip near the triac.

Chuck

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I used the hardware utility and turned on all channels. Then checked with a set of lights. the lights did not turn on at all for that channel.



I visually looked at all joints (opto, resistors, triac). I can see solder flow onto all of the pins and the boards. This opto is not 100% seated but I do have visual flow onto the pins and board.



What can I ohm or volt out? I may just have a bad opto??



Thanks,

Chris

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LightORamaDan

Reflow the solder on R15 and U4 as well as the triac, resistor and opto on channel 3.

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I tried this yesterday. Today I will try adding a touch more solder to each joint when I re-flow it.

On a good note my 2nd board worked perfect (put it together last night).

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