Author Topic: Express Issue  (Read 3879 times)

Offline Donny M. Carter

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Express Issue
« on: October 28, 2014, »
I have an Express that will not light the display LEDs or output to lights. I checked the 2700pf cap and it seems fine. I tried a known working 24FJ32GA002 and also swapped out the display chip with no luck. I re-flowed all the joints. I've inspected the chip socket also with no luck. I also verified correct voltage at the regulators. Any ideas please?
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Offline Dennis Cherry

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Re: Express Issue
« Reply #1 on: October 28, 2014, »
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I have an Express that will not light the display LEDs or output to lights. I checked the 2700pf cap and it seems fine. I tried a known working 24FJ32GA002 and also swapped out the display chip with no luck. I re-flowed all the joints. I've inspected the chip socket also with no luck. I also verified correct voltage at the regulators. Any ideas please?

I was in your town last Wednesday.

Did you check that the LED's are inserted correctly?  If backward you will have those problems described.

Dennis
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Offline Donny M. Carter

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Re: Express Issue
« Reply #2 on: October 28, 2014, »

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I have an Express that will not light the display LEDs or output to lights. I checked the 2700pf cap and it seems fine. I tried a known working 24FJ32GA002 and also swapped out the display chip with no luck. I re-flowed all the joints. I've inspected the chip socket also with no luck. I also verified correct voltage at the regulators. Any ideas please?

I was in your town last Wednesday.

Did you check that the LED's are inserted correctly?  If backward you will have those problems described.

Dennis

Yes they are correct!
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Offline jnealand

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Re: Express Issue
« Reply #3 on: October 28, 2014, »
Have you checked the fuses with a multimeter?
Jim Nealand
Kennesaw, GA

Offline Donny M. Carter

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Re: Express Issue
« Reply #4 on: October 28, 2014, »

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Have you checked the fuses with a multimeter?

Yes! Good to go!
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Offline jnealand

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Re: Express Issue
« Reply #5 on: October 28, 2014, »
Is this a new build or an older one?  i.e., has it ever worked?  What version board?
Jim Nealand
Kennesaw, GA

Offline Donny M. Carter

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Re: Express Issue
« Reply #6 on: October 28, 2014, »

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Is this a new build or an older one?  i.e., has it ever worked?  What version board?

V5 board. Built it a few months ago and just trying it out.
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Offline tbone321

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Re: Express Issue
« Reply #7 on: October 28, 2014, »
As always, please post some close up pictures of the front and back of the board.  Did you apply power to both sides of the board?   
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Offline Donny M. Carter

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Re: Express Issue
« Reply #8 on: October 28, 2014, »
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As always, please post some close up pictures of the front and back of the board.  Did you apply power to both sides of the board?

I've tried to take a few photos and they look like crap. I'll take a few tomorrow in better light!

I do have power, verified with a meter, to both sides.
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Offline Dennis Cherry

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Re: Express Issue
« Reply #9 on: October 29, 2014, »
OK the other thing to check is the the push button switches. If they are inserted wrong they will keep the LE from operating.

check them all carefully.
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Offline Donny M. Carter

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Re: Express Issue
« Reply #10 on: October 29, 2014, »

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OK the other thing to check is the the push button switches. If they are inserted wrong they will keep the LE from operating.

check them all carefully.

They are correct. I can see the dimple sticking through.
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Offline Donny M. Carter

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Re: Express Issue
« Reply #11 on: October 29, 2014, »
Here are a few pics. The burn spot on the lower board just happened. I was rechecking the solder joints and didn't realized I still had the damn board plugged in! :(
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Offline KeithTarpley

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Re: Express Issue
« Reply #12 on: October 29, 2014, »
Greetings,,,

Double check that we haven't missed a reset button not in correctly.

Plug the unit in with the reset button held down continually, and see if that changes anything.

Keith
"Now I know the only foe is time." -Moody Blues

Offline Donny M. Carter

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Re: Express Issue
« Reply #13 on: October 29, 2014, »

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Greetings,,,

Double check that we haven't missed a reset button not in correctly.

Plug the unit in with the reset button held down continually, and see if that changes anything.

Keith

No change Keith!
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Offline KeithTarpley

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Re: Express Issue
« Reply #14 on: October 29, 2014, »
Greetings,,,

Could you try with a known good dmx signal to see if any of the 16 leds light up, with all channels on?

But it looks like I would check around the pic and the switches, based on what I've read.  If you've got another unit that's working, you can compare voltages between the two.

Keith
"Now I know the only foe is time." -Moody Blues