some leds working incorrectly

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relaxing
 
Posts: 60
Joined: Thu Mar 24, 2005 11:22 am

some leds working incorrectly

Post by relaxing »

Everyone is now functional on my b0x except...

None of the LEDs right of and including 22 and 34 on the bottom rows, and 15-17 on the top row light up. I've checked them and they're good, so something with the control is weird.

More weirdness: LED's 26, 27, 40, 15, 16, 17 light up all at once (dimly) if I press the done button, and after pushing it any of the white keys lights that same groups of leds.

all buttons function normally otherwise. I upgraded the latest firmware.

Thanks for any help... On the mainboard schematics gif it's imposibble to tell which leds are on which ICs.

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Post by Guest »

all of the leds that are out
are controlled by ic6 and ic8
check that these are soldered well and not in backwards

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relaxing
 
Posts: 60
Joined: Thu Mar 24, 2005 11:22 am

Post by relaxing »

The ICs have good solder joints and are in correctly. I checked continuity in all the places I could.

The behavior with the 'done' button seems weird to me. But then, I don't fully understand what's going on with all the shift registers.

Could it be the microcontroller issue? I have #52.

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