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Slide LED Problem
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Slide LED Problem

by RETRO_STU on Fri Jan 27, 2017 12:16 pm

Hi
I've just picked up a second hand x0xb0x and the slide LED is varying in brightness, I've resoldered the LED and R204 but its still the same. Has anyone got any ideas on what could be the problem ?
Thanks
Stu

RETRO_STU
 
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Re: Slide LED Problem

by antto on Fri Jan 27, 2017 1:02 pm

the actual voltage (and the current) for the LEDs comes from the shift registers (74xx595 iirc)
the resistor limits the current
so check the voltage from the pin on the shift register

does it get darker when some other LED(s) lights up or just randomly?

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Please be positive and constructive with your questions and comments.