ReinardSynth#6 SY22 „no audio“ Repair

[@felippeboulderdash8453]

Thanks! This was usefull video for me! 👍👍👍

[@_P_M_]

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.

[@reinardsynth6581]

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...)

[@dariovicenzo8139]

Great job!

[@alejoromero]

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]

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

[@alejoromero]

@@reinardsynth6581 thank you so very much!!

[@johangroen3570]

Whats actually the difference between the sy 22 and the sy35?and from which sy is the tg33 the tabletopversion?

[@reinardsynth6581]

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)

[@jamesrmore]

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?

[@reinardsynth6581]

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]

Did you manage to fix this James? Mine has the same issue

[@morph-the-cat]

I had to put this on 0.25x speed to really see what’s going on!

[@felippeboulderdash8453]

Me too 😅

[@chamindacolabamudalige5884]

Howto factory reset sy 22

[@reinardsynth6581]

www.yamahamusicians.com/forum/download/file.php?id=9879&sid=7942b807ec3373134c4109fbd5cc83d2

[@giraudabbatiello5477]

promosm 😭