Great job! I enjoyed all of the detailed information on the repair. Liked the Weather on the 8's-style music too. Any idea what took the transistor out? If you ever make a video on repairing power supplies I will be very interested.
thx! why the transistor died: I think it is because of a current transient when switching off and on the SY22 very quickly... stored energy in the coil of the Relais might have spiked the current through the transistor? But just a suspicion... anyways: when turning off and on a device, do it with TLC, and wait 3-5 seconds before turning it on again... Linear power supplies are easy-> fault is mostly faulty capacitors or regulators, Switch mode power supplies (SMPS)... that's more challenging and i also do not like working on them because of the intricate/sensitive designs of them; but there are some good videos on youtube explaining repairing SMPS. It is an advanced subject and requires some care and attention: voltage levels on SMPS can be deadly (300-400V DC...)
What is the function of the Yamaha sy22 aftertouch sensor bar. It contains a flat plastic strip with what looks like two black carbon strips running the length of the keyboard bed. One side is red felt. The plastic strip extends and terminates in a 3 pin white plastic connector soldered to the circuit board covering the kb bed with dual black sensors for each key to press into. Does the strip simply friction fit into connector? Do the 2 carbon strips carry current to complete a circuit? If the carbon becomes scratched does it break continuity? Thanks for your excellent comprehensive video. The sy22 is somewhat unique. The keys with their flat spring are a little fragile but I enjoy the feel and response.
@@jamesrmore the aftertouch strip is nothing more than a variable resistor: depress a section harder-> overall resistance of the strip reduces (you can measure this at the connector with a multimeter). The key pressing the hardest on the strip determ8nes the overall resistance. A circuit on the key contacts pcb underneath the keybed converts it into a voltage which the cpu measures and converts into a value between 0 (no aftertouch) and 127 (hard press on aftertouch). the aftertouch strip is glued with tape to the metal frame.
The end which goes into 3 pin connector, is it safe to just pull strip out? Is this a friction fit? I pulled strip out but not sure how to reattach. I get continuity between 3 pins and corresponding metal in connector but moving to carbon on strip is iffy.
@@reinardsynth6581variable resistor. So only affects after touch not modulation? How is modulation calculated? I like the Leslie-like effect of pushing harder on the key and getting modulation. Is this a separate path? Modulation also happens with the foot switch and modulation wheel. Thanks, I may need a new 3 pin connector, since I unsoldered it from PCB, haha 😛
Only 2 pins are used, you can take out the flatcable by moving up the retainer (top part of the connector) 0,5mm and pulling out the flatcable. The aftertouch value derived this way is used by the CPU to control whatever is programmed for the patch: lfo modulation depth, effects send? (don’t know by heart how flexible yamaha implemented it for the sy22) there is inly ine
Hello, greetings from Bogotá, Colombia. I have a Yamaha SY 35 synthesizer, and it has two problems, one is that the patch selection and function buttons must be pressed with some force because they do not seem to make good contact. The other problem it has is that one of the keys sounds louder than the others. I have to press the key very gently so that it doesn't sound so loud. What could be the cause of these failures? Thank you very much.
@@reinardsynth6581 Vielen Dank. Does this also work with typical Rubber contact strips for synthesizer keys that contains carbon contacts inside, like Roland in D-70 uses?
@@h.guntersson2243 no. I recommend using pure alcohol to clean the carbon-rubber contacts or strips used in keybeds. Have a look at fault #3 in m.th-cam.com/video/_YVlsIS3QSk/w-d-xo.html on how to do this.
Over time the keyboard loses sensitivity and response. What products do you recommend for cleaning keys, contacts and rubber like parts, please? Guessing IPA stands for Isopropyl alcohol? Guess it’s good for cleaning everything? Strength?
IPA (pure alcohol) works best: procedure is as shown in this episode… this keybed can be temperamental though: be precise when putting it back together again
@@morph-the-cat just noticed your comment. I have been successful. This is by far the best video on rehabilitating the sy22. I’ve taken it apart many times now. The author mentions putting it back together carefully and as it came apart. Recently I’ve replaced keys which I purchased on eBay. The tiny tab holding the flat flex spring breaks of so the key no longer pops back up. Again make sure you note the original configuration and orientation of each item. (I take photos). I’ll note 2 other issues. Each key has a complex shape pushing down on the rubberized panel. The white strip tends to stretch over time so treat it gently. Do not over tighten the many screws that hold it is place. Too much compression. Each key slides into place in a very specific manner and requires catching the spring in the metal slot just so. Taking the keyboard out from frame requires unhooking various connecting wire bundles and ground straps. Photo them, I marked the wire bundle straps with colored permanent marks. The most problematic issue for me was the flat plastic strip connecting the keyboard to the sensor panel**. I finally took a pointed solder tip and unsoldered the 3 pin connector from the board, freeing the two pieces ( keyboard and sensor panel). Along with unsoldering the one soldered ground strap allows taking all pieces completely apart. While you have apart make sure modulation wheels are tightly screw in and lubricated. They work lose over time. Parts can be found at several locations. Here is link: www.keyboardkountry.com/keyboard-parts/yamaha/sy-series/?page=3. Also the “**aftertouch sensor strip for $20” : www.keyboardkountry.com/yamaha-aftertouch-sensor-strip-for-sy22-and-possibly-others/ Good luck.
I have other synths but the sy22 still has my favorite touch and response. I midi it to a 2nd synth. I have now taken mine apart many times. Keys tend to require replacement. See my notes elsewhere. The first time is the hardest. Now I’ve got it down. To take completely apart I use a pointed soldering iron to take lose one soldered ground strap and also unsolder the 3 pin connector holding the plastic strip from sensor strip. Favorite action and light weight compared to the sy99. Peace ✌️ all!
Both the SY22, SY35 and TG33 have the exact same sound generation chips and Digital-to-Analog converter. (so the myth that the SY35 uses better 16 bit DACs or samples is not true) I compared the schematics of the two and the only difference I can find: The SY35 has the same number of PCM waves (128), but double the wave memory (2Mbyte stead of the 1Mbyte of the SY22) so expect better quality samples because of more sample ROM. When from the factory, the SY35 has original sounds stored in it's user RAM in addition to the pre-set ons, so 128 in total, whereas the SY22 only has 64 original sounds, the sounds in user RAM are copies of these. The specially of the TG33 is, that is has double the polyphony for he SY22 (4 instead of 2 sound generation ICs), but the same ROM size for samples (1Mbyte)
Such a great and informative video, thanks! I have sy35 with dead pitchbend wheel also aftertouch is not working either.
Thanks! This was usefull video for me! 👍👍👍
Great job!
Great job! I enjoyed all of the detailed information on the repair. Liked the Weather on the 8's-style music too. Any idea what took the transistor out? If you ever make a video on repairing power supplies I will be very interested.
thx! why the transistor died: I think it is because of a current transient when switching off and on the SY22 very quickly... stored energy in the coil of the Relais might have spiked the current through the transistor? But just a suspicion... anyways: when turning off and on a device, do it with TLC, and wait 3-5 seconds before turning it on again... Linear power supplies are easy-> fault is mostly faulty capacitors or regulators, Switch mode power supplies (SMPS)... that's more challenging and i also do not like working on them because of the intricate/sensitive designs of them; but there are some good videos on youtube explaining repairing SMPS. It is an advanced subject and requires some care and attention: voltage
levels on SMPS can be deadly (300-400V DC...)
What is the function of the Yamaha sy22 aftertouch sensor bar. It contains a flat plastic strip with what looks like two black carbon strips running the length of the keyboard bed. One side is red felt. The plastic strip extends and terminates in a 3 pin white plastic connector soldered to the circuit board covering the kb bed with dual black sensors for each key to press into. Does the strip simply friction fit into connector? Do the 2 carbon strips carry current to complete a circuit? If the carbon becomes scratched does it break continuity? Thanks for your excellent comprehensive video. The sy22 is somewhat unique. The keys with their flat spring are a little fragile but I enjoy the feel and response.
@@jamesrmore the aftertouch strip is nothing more than a variable resistor: depress a section harder-> overall resistance of the strip reduces (you can measure this at the connector with a multimeter). The key pressing the hardest on the strip determ8nes the overall resistance. A circuit on the key contacts pcb underneath the keybed converts it into a voltage which the cpu measures and converts into a value between 0 (no aftertouch) and 127 (hard press on aftertouch). the aftertouch strip is glued with tape to the metal frame.
The end which goes into 3 pin connector, is it safe to just pull strip out? Is this a friction fit? I pulled strip out but not sure how to reattach. I get continuity between 3 pins and corresponding metal in connector but moving to carbon on strip is iffy.
@@reinardsynth6581variable resistor. So only affects after touch not modulation? How is modulation calculated? I like the Leslie-like effect of pushing harder on the key and getting modulation. Is this a separate path? Modulation also happens with the foot switch and modulation wheel.
Thanks, I may need a new 3 pin connector, since I unsoldered it from PCB, haha 😛
Only 2 pins are used, you can take out the flatcable by moving up the retainer (top part of the connector) 0,5mm and pulling out the flatcable. The aftertouch value derived this way is used by the CPU to control whatever is programmed for the patch: lfo modulation depth, effects send? (don’t know by heart how flexible yamaha implemented it for the sy22) there is inly ine
Hello, greetings from Bogotá, Colombia. I have a Yamaha SY 35 synthesizer, and it has two problems, one is that the patch selection and function buttons must be pressed with some force because they do not seem to make good contact. The other problem it has is that one of the keys sounds louder than the others. I have to press the key very gently so that it doesn't sound so loud. What could be the cause of these failures? Thank you very much.
clearly contact issues. clean the front panel pans like I did at 3.58 and clean the key bed contact strips and pcb as in step 2
@@reinardsynth6581 thank you so very much!!
Thats a great video. What kind of fluid you use for the ultrasound cleaner?
Water with a small drip of dishwasher liquid
@@reinardsynth6581 Vielen Dank. Does this also work with typical Rubber contact strips for synthesizer keys that contains carbon contacts inside, like Roland in D-70 uses?
@@h.guntersson2243 no. I recommend using pure alcohol to clean the carbon-rubber contacts or strips used in keybeds. Have a look at fault #3 in m.th-cam.com/video/_YVlsIS3QSk/w-d-xo.html on how to do this.
@@reinardsynth6581 Much thanks. Zen work.
did anyone try to upgrade DAC on sy 22? I have both sy22 and sy35 and really preffer 35's sound more
Over time the keyboard loses sensitivity and response.
What products do you recommend for cleaning keys, contacts and rubber like parts, please? Guessing IPA stands for Isopropyl alcohol? Guess it’s good for cleaning everything? Strength?
IPA (pure alcohol) works best: procedure is as shown in this episode… this keybed can be temperamental though: be precise when putting it back together again
Did you manage to fix this James? Mine has the same issue
@@morph-the-cat just noticed your comment. I have been successful. This is by far the best video on rehabilitating the sy22. I’ve taken it apart many times now. The author mentions putting it back together carefully and as it came apart. Recently I’ve replaced keys which I purchased on eBay. The tiny tab holding the flat flex spring breaks of so the key no longer pops back up. Again make sure you note the original configuration and orientation of each item. (I take photos). I’ll note 2 other issues. Each key has a complex shape pushing down on the rubberized panel. The white strip tends to stretch over time so treat it gently. Do not over tighten the many screws that hold it is place. Too much compression. Each key slides into place in a very specific manner and requires catching the spring in the metal slot just so.
Taking the keyboard out from frame requires unhooking various connecting wire bundles and ground straps. Photo them, I marked the wire bundle straps with colored permanent marks. The most problematic issue for me was the flat plastic strip connecting the keyboard to the sensor panel**. I finally took a pointed solder tip and unsoldered the 3 pin connector from the board, freeing the two pieces ( keyboard and sensor panel). Along with unsoldering the one soldered ground strap allows taking all pieces completely apart. While you have apart make sure modulation wheels are tightly screw in and lubricated. They work lose over time. Parts can be found at several locations. Here is link: www.keyboardkountry.com/keyboard-parts/yamaha/sy-series/?page=3.
Also the “**aftertouch sensor strip for $20” : www.keyboardkountry.com/yamaha-aftertouch-sensor-strip-for-sy22-and-possibly-others/
Good luck.
I have other synths but the sy22 still has my favorite touch and response. I midi it to a 2nd synth. I have now taken mine apart many times. Keys tend to require replacement. See my notes elsewhere. The first time is the hardest. Now I’ve got it down. To take completely apart I use a pointed soldering iron to take lose one soldered ground strap and also unsolder the 3 pin connector holding the plastic strip from sensor strip. Favorite action and light weight compared to the sy99.
Peace ✌️ all!
@@jamesrmore Thank you so much! That's really helpful
I had to put this on 0.25x speed to really see what’s going on!
Me too 😅
Whats actually the difference between the sy 22 and the sy35?and from which sy is the tg33 the tabletopversion?
Both the SY22, SY35 and TG33 have the exact same sound generation chips and Digital-to-Analog converter. (so the myth that the SY35 uses better 16 bit DACs or samples is not true) I compared the schematics of the two and the only difference I can find: The SY35 has the same number of PCM waves (128), but double the wave memory (2Mbyte stead of the 1Mbyte of the SY22) so expect better quality samples because of more sample ROM. When from the factory, the SY35 has original sounds stored in it's user RAM in addition to the pre-set ons, so 128 in total, whereas the SY22 only has 64 original sounds, the sounds in user RAM are copies of these. The specially of the TG33 is, that is has double the polyphony for he SY22 (4 instead of 2 sound generation ICs), but the same ROM size for samples (1Mbyte)
Your eBay site is in German. Do you have English version?
Eh… texts are in english, location is Austria; true and therefor prices in Euro. Ebay should present UK/USA browsers with an english version?
Howto factory reset sy 22
www.yamahamusicians.com/forum/download/file.php?id=9879&sid=7942b807ec3373134c4109fbd5cc83d2
promosm 😭