[sdiy] Glowing diode on Casio CT-510 analog board?

Benjamin Tremblay btremblay at me.com
Tue May 23 14:03:54 CEST 2023


The PCM drums on the CT-510 are delightfully cheesy. Turn down the treble and it’s lo-fi. 
I have a couple of crosspoint switch ics. This is a candidate for adding crosspoint switching, a small arduino board, and midi ports. 

Benjamin Tremblay

> On May 23, 2023, at 7:57 AM, Benjamin Tremblay <btremblay at me.com> wrote:
> 
> I do think the LED is related to power and possibly the LED was part of a unit test on the assembly line. 
> I was able to get the CT-510 repaired last night. There’s a serious crack in the underside of that PCB, cutting off the audio traces going to the power amplifiers. 
> One more trace went from the base of a transistor to the ribbon cable to the CPU. This seems like a muting/battery-save control line. After I restored that trace, things came back online and voltage was around 5.2V. Good enough for me.
> 
> Thanks for the spiritual guidance!
> Ben
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