Teodice Posted January 12, 2021 Share Posted January 12, 2021 Hi I'd like to turn off the automatic shutdown on my CASIO HT-700 permanently. I use it only as an external instrument via MIDI. Its rigged up pretty far from my keyboard station (and computer) so when it turns itself off after only a few minutes its really frustrating to have to go back and forth. I havent found an option to turn it off in the manual but I am fully prepared to go into it and solder if that is necessary and possible. Can anyone help me? Manual can be found here: https://www.polynominal.com/site/studio/gear/sold/casio_ht700/casio-ht700-manual.pdf Quote Link to comment Share on other sites More sharing options...
giano Posted January 13, 2021 Share Posted January 13, 2021 Hi Teodice, the easiest solution I can think of is leaving the Rhythm playing with zero volume; the HT700 will send out some data via MIDI OUT though. In fact, also pressing SYNCRO would stop the clock, but I am not sure if incoming MIDI data would start the accompaniment. Quote Link to comment Share on other sites More sharing options...
Jokeyman123 Posted January 13, 2021 Share Posted January 13, 2021 Probably a timing IC somewhere-would have to have the schematic to be sure. These are usually tiny chips marked 555 with I recall 8 leads soldered onto an IC board, plus a few other components around it if the length of the timing can be varied. https://en.wikipedia.org/wiki/555_timer_IC Quote Link to comment Share on other sites More sharing options...
Chas Posted January 14, 2021 Share Posted January 14, 2021 Some small form factor Casios, such as the CZ101, have an APO (Auto Power Off) override switch. Unfortunately, the HT700 does not. There's a guy on YouTube that made a whole bunch of modifications to his HT700, and one of the mods was to add a small circuit to constantly reset the APO timer. He sent me the schematics for all these mods, and I have them on my main computer. When I'm next on it I'll dig them then out or find the link to his website. Quote Link to comment Share on other sites More sharing options...
Teodice Posted January 15, 2021 Author Share Posted January 15, 2021 On 1/14/2021 at 6:41 PM, Chas said: Some small form factor Casios, such as the CZ101, have an APO (Auto Power Off) override switch. Unfortunately, the HT700 does not. There's a guy on YouTube that made a whole bunch of modifications to his HT700, and one of the mods was to add a small circuit to constantly reset the APO timer. He sent me the schematics for all these mods, and I have them on my main computer. When I'm next on it I'll dig them then out or find the link to his website. Oh Wow, YES PLEASE! Thats exactly what I'm looking for, would be so grateful if you could help me! Quote Link to comment Share on other sites More sharing options...
Chas Posted January 16, 2021 Share Posted January 16, 2021 On 1/15/2021 at 3:47 PM, Teodice said: Oh Wow, YES PLEASE! Thats exactly what I'm looking for, would be so grateful if you could help me! Here you go! It's the link to a little website put up by the guy who made all the mods. There are two YouTube embedded videos in it demonstrating what the mods can do, and also downloadable PDF links to the schematics for a standard HT3000 (pretty much the same as an HT700), along with PDF links to his modified/ custom schematics showing how he built the additional circuits for some of the mods. https://synthstuff.wordpress.com/2012/01/04/casio-ht-700-mods/ Quote Link to comment Share on other sites More sharing options...
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