Casio SA21 (SA-21) Keyboard Repair & Restore

[@Boogie_the_cat]

I respect those old Casios. So much class and character. Glad you could save this one from the bin.

[@RetroTechRepair]

I agree. Nice thing. It's my most viewed video by a long way. Thanks for your comments

[@antaravaishnavi]

I also have the same one, my dad bought me this on my birthday in 2002as far as i can remember but he's no more! And I wanna fix it no matter what, since it was my first musical instrument, it's my favorite!

[@RetroTechRepair]

Oh Antara I am so sorry for the loss of your dad. I lost mine 10 years ago and I miss him every day. I hope you get your keyboard repaired. Thank you so much for your heartfelt messages ❤️ ♥️

[@skyway73]

It's fascinating how many comments from other nations this video has attracted! Nice repair, thanks for uploading (a UK fan 😁)

[@RetroTechRepair]

This is actually my most watched video by a good margin. Seems to be very popular in India where many views come from. Nice to have some international reach. I often get enquires how much it would be to ship the keyboard to India. Thanks again

[@animeshtirkey933]

@@RetroTechRepair This is one of the very popular musical instrument for the Indian kids in the late 90s and early 2000 almost all of my friends have it along with me. No doubt its worth watching n gives a nostalgic vibe.

[@RetroTechRepair]

@@animeshtirkey933 Thanks, it's my most popular video by a mile! Thanks so much for explaining why. I'm so glad you enjoyed the video thanks so much for explaining and for your comments.

[@vikeshkumar6855]

Sir eska addpter wala circuit me Jo ic LGA hai ..uska number btaye. Na

[@RetroTechRepair]

Sorry I can't help

[@techtinkerin]

I knew straight away it'd be the negative tip. All Casio's are negative tip. Love your videos so nice to see these cool things repaired! 😊👍 Funny how they always have a b c stuck on them..

[@RetroTechRepair]

Thanks.... yeah rookie mistake on my part oddly though this is my most viewed vid by a mile! Thanks for your comments hope you enjoy the channel.

[@nikunjpatel3874]

Piano me Apne aap tune back ragi he use kaise riperi kare

[@RetroTechRepair]

thanks for your comment

[@Thumkaa]

I have the same thing. But it is not running when I starting it, tune are not playing only the speaker is talking sssssssss. Please let me know what's happening.

[@RetroTechRepair]

Hi Jaydeep, sorry I don't have the keyboard anymore so I can't help diagnose much. Perhaps try checking the printed circuit board and test components on it.

[@Thumkaa]

@@RetroTechRepair thanks for your response

[@RetroTechRepair]

You are very welcome.

[@quelhas3821]

Mine is making a frequency sound that almost blows my ears i donde know what to do

[@RetroTechRepair]

Sorry Quelhas. This is quite an old video now and I don't have the keyboard any more. Sorry I cannot help

[@deodatgyorei]

I have an SA-20 and I can turn it on, the keys work but it only makes piano sound and none of the selector buttons work. Could You please point me in the right direction what to check?

[@RetroTechRepair]

I'm no expert I think I'd check for electrical continuity between the button contacts and connection to the processor on case their has been battery leak damage. I'd also clean the button contacts on the board and carbon pads on the back of the buttons I case it's had something spilled on it or they have oxidised. Like I say I'm not an expert so this isn't advice it's just what I would do. Cheers

[@deodatgyorei]

@@RetroTechRepair Thanks a lot for the answer, I'll try! :)

[@Exam4364]

My casio sa21 amp circuit transistor was burned so i remove it and lost it. Can you tell me your transister number ?

[@RetroTechRepair]

Sorry I don't have the keyboard anymore. So sorry

[@Exam4364]

@@RetroTechRepair ok. Thanks for replying 👍

[@dineshchaitanyafirozabad7614]

Ye mujhe chahiye kaha milega

[@RetroTechRepair]

kshama karen, mujhe nahin pata

[@beautyandnature4074]

How cani reapir sa21 resound problem sir

[@RetroTechRepair]

Sorry I do not know 😟

[@sudhirsinghania4938]

there is problem of black keys settings how to insert them

[@RetroTechRepair]

Sorry I can't help. Bit thanks so much for your question

[@sanjivansontakke5155]

Sir,wheni start this cassio then automatically change no.of keys please tale me what happened?

[@RetroTechRepair]

Sorry I don't know what happened

[@PranayBahekar]

Same problem

[@sunilrajak3486]

Sir I have not an adopter for as21 keyboards can u tell me How much volt and current adopter isrequired for Casio as21

[@RetroTechRepair]

I don't know for sure but Think it might be 7.5V centre -ve. Current is low maybe 500mA

[@drmahendrasingh9891]

Sir Mujhe 21 no casio chah eye .kya ye uplabdh h to Mujhe Batao or prise kitna have.

[@RetroTechRepair]

thanks for your comment

[@WeeMuseUK]

Very nice RTR. ;) I think we have all done that at one point!. It might be useful to detail how to retrofit a polarity protection diode, as not all keyboards/devices have this and it really is a device saver. FYI, if you like these sounds and want something with more range, there are 4 octave versions of this keyboard available. Although not as common as the SA series, look out for casio MA-101 and 201 on ebay, they do occasionally pop up for sale. ;)

[@RetroTechRepair]

Hi Chris, thanks for your detailed comments that's a good suggestion, I hope to do a few more keyboards soon. I don't play so I'm always concerned the keyboard repairs are a bit "light" as I just jab at buttons once I have fixed them. If I find one without a protection diode I will definitely do a mod video. Great idea. Nice feedback on alternative models too, I bet they use the exact same IC. Thanks again for feedback. Hope you enjoy the content

[@WeeMuseUK]

@@RetroTechRepair Yes same silicon chip inside, but many different IC packages. Have a lot of service manuals and have done some research as wanted to increase number of keys on a number of models, but its not possible on most. What Casio and Yamaha appeared to do (way back) is produce the same IC on same die, but package differently for different models, that is connect different pins to the silicon to the outer pins on the plastic package. Its cheaper to fabricate a single fully functional IC then do a different package run, it means that only certain features are available and there are limited easter eggs available. Some, but not the full potential of the silicon. Hope thats not too geeky! ;)

[@WeeMuseUK]

... Deductive reasoning. Going by service manuals, the SA series has half a dozen (or more) versions of same IC, same number, but with 'versions' e.g. -16, -08 at the end. They all have same sounds, but slightly varying pin-outs and in some case reduced pin numbers (cheapest ones). Bet its exactly the same silicone inside as silicon design & fabrication is the expensive bit. I guess the best potential for easter eggs would come from the most functional models with most number of pins.

[@Charles-ef2rf]

hey can you help me with that amplifier circuit on the keyboard based on an8053n circuit!! I lost that circuit while repairing my sa-21.Just provide me the circuit diagram of that amplifier.

[@RetroTechRepair]

Hi Charles thanks for watching the video. This was a simple repair and I didn't need the circuit diagram so I don't have it. But I typed Casio SA-21 schematic into google and it identified several free sources. Sorry I can't be more help

[@ErkEdaR]

Sir I want to IC AN8053n please help me where is found???

[@ErkEdaR]

I am belonging from Maharashtra

[@RetroTechRepair]

Sorry I can't help. Thanks for your question

[@PranayBahekar]

I have this keyboard . From where can I get that power supply pcb

[@RetroTechRepair]

Sorry I don't know

[@yashmore719]

Please can u repair cjarger of this keyboard 🙏🙏🙏

[@RetroTechRepair]

Sorry I don't have it anymore

[@surajp2322]

I didnt use my keyboard for 4 tot 5 years And now i tried to turn it on but it didnt turn on what should i dod for that.......pls help me if you know

[@RetroTechRepair]

I can't give advice but if it were my keyboard. I would try cleaning the battery terminals. You may need to remove the back cover to access the spring terminal and clean off any rust

[@vanithapar4921]

Hey i am facing the same problem.. pls suggest anything that worked for you

[@joy-qh3oq]

What you do electric city

[@RetroTechRepair]

yes do electricity! Thanks so much for your comment.

[@nirbhayjariwala]

How did you reverse the power supply, i have an adaptor

[@RetroTechRepair]

My power supply was a universal adapter which had a reversible DC plug.

[@priteshjani797]

Mine isn't working via power supply. I don't know how to fix it. Can you please help, can you please elaborate how to get that working.

[@sreeraj200]

You can connect adopter also , don't connect more than 5.5 v power

[@aaradhanaaaradhan6070]

Sir ye casio mojhe bhi cahiye kaise mangaye

[@RetroTechRepair]

Thanks for your comment

[@nbyhbovivekanandanofu912]

Sir can you tell me a repair shop of this key

[@RetroTechRepair]

Hi! Thanks for your comments. Unfortunately I do not know of a repair shop. Sorry

[@gatikrushnadas369]

Only piano sound come no other saound what is the reason

[@RetroTechRepair]

Sorry I do not know

[@sudhirsinghania4938]

where do I get the Black keys sets full

[@RetroTechRepair]

Thanks for your comments. The keyboard is not for sale

[@RetroTechRepair]

Sorry I do not know

[@gulzarmedia3131]

Sir.... How much price is in shop... Of these product

[@RetroTechRepair]

Sorry. I don't sell products

[@drmahendrasingh9891]

Sir ji kya aapke pass ye 21 no ka casio mill jayega.

[@RetroTechRepair]

Interesting

[@narasimharaolakamala8519]

Sir I want black and white keys set

[@RetroTechRepair]

Sorry I can't help

[@vinodsoni7511]

Where buy

[@RetroTechRepair]

Sorry not for sale

[@sobujmediahd]

Sent to Bangladesh....?

[@RetroTechRepair]

Sorry no. The keyboard is not for sale

[@sobujmediahd]

@@RetroTechRepair ok,, tnx

[@yogeshhode236]

Sa 41 service center plz send repair store

[@RetroTechRepair]

thanks for your comment

[@santoshsahoo8772]

Now sa21casio available or not?

[@RetroTechRepair]

Sorry. Not available. Thanks for looking.

[@pangeranzal0978]

is the sa 21 piano sold ?? can i buy it tanks

[@RetroTechRepair]

Sorry it's gone. it was donated to charity.

[@pangeranzal0978]

what's still there. type sa 45 and 21 keyboard I was looking for. for extracurricular music school br

[@RetroTechRepair]

@@pangeranzal0978 sorry it's gone

[@pangeranzal0978]

do you have an fb account so that I can get to know me from Indonesia ..😊

[@RetroTechRepair]

@@pangeranzal0978 @retrotechrepair

[@goluvinayak3038]

Price

[@RetroTechRepair]

Hi, this was a lot of 2 keyboards I bought on eBay. I paid 15 GBP for the two. The other one will feature in a future vids. I gave this SA21 to charity. I dont repair professionally, just for fun. The cost to me of this repair was very little. Thanks for your comments

[@laxminarayanlaxminarayan2131]

41no. Caisio kaise milegi

[@RetroTechRepair]

thanks for your comment

[@JayBmusic]

Thanks for the flowers. :D Nice work on this one!

[@RetroTechRepair]

Glad you enjoyed the video!

[@sathishbyndoor8785]

Sir Casio sa 21 available??

[@RetroTechRepair]

Sorry no. It is not

[@PappuKumar-ud1nt]

guitar net price Koto

[@RetroTechRepair]

Yup

[@sprtjnke]

Thanks to My Mate Vince for sending me over. Time for a Cuppa now, cheers.

[@RetroTechRepair]

Great to have you along Dave 👍 and another huge thanks to MMV.

[@ximenaontiveros7183]

Buen video, me sirvio mucho nueva suscriptora saludos!

[@RetroTechRepair]

Thanks!

[@Lets-Drone-With-Bone]

Another great video, another fix :-) have you ever tried wd40 or gt85 for removing sticky labels and glue etc, works great, just have to leave it to soak in for a while.

[@RetroTechRepair]

Great tip. Thanks. I haven't tried GT65 but did try WD40 and it worked a treat. Thanks 👍

[@HyperMotionDX]

Sound 62: "Wah voice" was used in Sicko Mode

[@RetroTechRepair]

Cool!

[@nidhi4079]

I cannot thank you enough , it turned out i was using the wrong polarity

[@RetroTechRepair]

Great! Happened to me too. The polarity Casio chose for their keyboards seems far less common than the other way around.

[@nidhi4079]

RetroTechRepair exactlyy , also really appreciate you doing such a thing , wholesome!!!

[@antaravaishnavi]

I may sound stupid but what's "polarity" in keyboards?

[@Surajkumar-dp4er]

Sir SA 41 keyboard in awlebel

[@RetroTechRepair]

Sorry no :( thanks for enjoying the video

[@singerjsrawat8138]

can it be in hindi?because we don't know English

[@RetroTechRepair]

Sorry. I don't speak Hindi but if somebody wants to translate and add subtitles let me know

[@singerjsrawat8138]

thanks for it

[@pendorvissu]

How much money is the casio sir

[@RetroTechRepair]

Sorry it is sold.

[@pendorvissu]

casio price sir plz

[@pianoharmoniumsong3355]

ভাই কেচিও টা বিক্রি হবে নাকি।

[@RetroTechRepair]

Thanks for your comment

[@தமிழன்தளபதி-ப3ந]

Casio sa21 kidaikkuma bro

[@RetroTechRepair]

Thanks for your comments

[@satyram7967]

Sir casio sa 21 कहां मिलता है

[@RetroTechRepair]

Thanks for the comment. I have no idea what it says, but thanks anyway!

[@marcinfilimoniuk5160]

@@RetroTechRepair he says "Where do you get" ( google translate XD)

[@do-tu5wz]

It's actually from the 90's.

[@RetroTechRepair]

Actually, yes 1991 I think. Thanks SO much for the clarification 😊

[@do-tu5wz]

@@RetroTechRepair you are welcome 👍

[@vibhavnaik3346]

Bhai muje ye keyboard chahiye plz reply karo

[@RetroTechRepair]

Sorry I don't have the keyboard anymore. Glad you enjoyed the video.

[@vibhavnaik3346]

@@RetroTechRepair Bhai sa21 keyboard he kya

[@RamukumarPrajapatj]

Vehicles over here tonight

[@RetroTechRepair]

That's nice.

[@zsathiya1514]

Indiya me nahi milta

[@nbyhbovivekanandanofu912]

Ma'am milta hai

[@sagartamhankar2360]

Kaha milta hai

[@RetroTechRepair]

thanks for your comment

[@RetroTechRepair]

thanks for your comment

[@RetroTechRepair]

thanks for your comment

[@badhonebrahim7707]

you couldve converted to a lithium ion powered keyboard

[@RetroTechRepair]

Hi Badhon. Good idea., I'm sure there are many mods that can be done. Maybe we cam circuit bend one on day. Thanks so muchbfor your feedback

[@RikkaYeet]

I also have it working in good condition

[@RetroTechRepair]

Good to hear!

[@RikkaYeet]

@@RetroTechRepair :)

[@shamsherdeep1986]

Mere paas hai uski suply jall gayi

[@RetroTechRepair]

Sorry I can't help

[@हिमांशुराजपूत-ख2व]

Super

[@RetroTechRepair]

thanks for your comment. Glad you enjoyed the video

[@goluvinayak3038]

Stor kaha hai

[@RetroTechRepair]

England

[@judhisthirapati]

I want sa 21

[@RetroTechRepair]

Great little keyboard. Sadly I don't have mine anymore

[@gemcolaton7126]

Kapareha ng keyboard ko padala pa saken nun 1993 ng tatay ko

[@RetroTechRepair]

Happy to bring back some fond memories

[@RULLES_SKY]

I Like keyboards sa21 cek in KZbin channeLLs

[@RetroTechRepair]

Great. Thanks for your comment

[@mdhelal6599]

Akta Casio kinbo

[@RetroTechRepair]

Thanks for your comment

[@msdc301]

Money point

[@RetroTechRepair]

Sorry I don't have it anymore

[@bablupaswan3389]

Ic no ask yoy

[@RetroTechRepair]

Thanks

[@bablupaswan3389]

ic reapaar

[@RetroTechRepair]

Thanks

[@zsathiya1514]

India me bhejo mal

[@RetroTechRepair]

thanks for your comment

[@udshehan4794]

I have so many great memory's with this Keyboard 🥲

[@RetroTechRepair]

Good to hear. Glad you enjoyed the video. Thanks so much for your feedback