REI_ARTHUR Posted October 23, 2019 Share Posted October 23, 2019 Hello, everyone. I would like some help from the tech guys. My Expression pedal stopped working. At first, it started to roll back to heel position constantly (0%) by itself. Now it's completely stuck on 0%. So i can't use it to control anything. If i assign it to a volume pedal the patch will go completely silent, for instance. The pedal switch is working normally and is changiing from EXP 1 to EXP, as it should. It just won't sweep, even when at pedal cal. screen. I've tried to flash it again with no luck, so it's probably hardware. After fighting it, I had it opened by a tech friend. He said the probable cause is an optical sensor pair malfunction. He said i should take it back to him when he has the time to work on it, but gave me the green light to research the part beforehand just in case he comes to the same conclusion after examination at his shop. So here i come... does anyone know the correct specs and ID for the part and where i could get it??? I attached some pics to help. Thanks !!!!!! Quote Link to comment Share on other sites More sharing options...
hurghanico Posted October 23, 2019 Share Posted October 23, 2019 The part you're looking for probably is the phototransistor Optek OP580.. I know they worked good as replacement for the POD X3L pedal optical sensors, and I strongly suspect that they would work perfectly on the HD500X too. datasheet As a possible fixing you could also try to heat the not working optical sensors with a hair dryer for 1 minute or 2.. Who knows?.. It could work. Also, make sure the cable plugs from the pedal pcb to the motherboard are firmly seated. _______________________________________________________________________________________________________________________________________________________________________ All about POD HD500/X help and useful tips 1 Quote Link to comment Share on other sites More sharing options...
REI_ARTHUR Posted October 23, 2019 Author Share Posted October 23, 2019 Awesome!!!!!!!!!! Thank you so very much!!!!!!!!!!!!!!! I really appreciate it. Quote Link to comment Share on other sites More sharing options...
laerciocfh Posted February 26, 2020 Share Posted February 26, 2020 On 10/23/2019 at 7:33 PM, REI_ARTHUR said: Awesome!!!!!!!!!! Thank you so very much!!!!!!!!!!!!!!! I really appreciate it. Hi there, could you fix your pedal? Please give us more details. Quote Link to comment Share on other sites More sharing options...
timoty_sofyan Posted April 11, 2020 Share Posted April 11, 2020 Amazing, its work!!!! My POD HD500 get same problem and i heat with hairdryer for 2 minute and the pedal back to normal. thank you Quote Link to comment Share on other sites More sharing options...
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