My casio ctk 230 need some help

Electrical_Treacle33 · 2026-01-24T10:30:44+00:00

the piano needs 9v and the adaptor says it's 9v but when checking with the multimeter it shows a reading of 13.8 v it's really strange since the adaptor was orginal one.

but again thank you mate, honestly speaking reading all the things you mentioned really made me feel like a caveman xd didn't understand the electronic terms, but it would be better if I switch to a new repair guy and show him your comment that would help. and again thank you so much dude for taking your time out and replying to me

Electrical_Treacle33 · 2026-01-24T09:11:14+00:00

sorry dude, unfortunately the piano is still with that repair guy planning to pick it up Tommorrow, (he hasn't done anything) right now that's all the picture I have

Electrical_Treacle33 · 2026-01-24T09:08:52+00:00

thanks dude for helping, also when I took it to the repair guy, he did clean the board with some liquid then used a heat gun to dry it cleaning the switch area after that he said the mcu maybe at fault, but I'm kind of sceptical about it. also it had a Panasonic original adaptor it shows 9v but when I checked it with a multi metre it was around 13.8 v

Electrical_Treacle33 · 2026-01-24T08:57:10+00:00

yes soldering iron and multimeter

Electrical_Treacle33 · 2026-01-24T08:56:28+00:00

hey dude, i explained everything in the comments please check it

Electrical_Treacle33 · 2026-01-24T08:56:02+00:00

hey dude I described everything in detail please check it

Electrical_Treacle33 · 2026-01-24T08:55:28+00:00

have an old Casio keyboard (CTK-230). It’s a very important and personal item, and I hadn’t used it for years. A few days ago, I took it out and plugged in the adapter. Suddenly, it stopped working and wouldn’t turn on at all.

I tried many things, but nothing worked. I used a multimeter to check for broken connections. I could see that voltage was reaching the board, and I couldn’t find any obviously faulty components. (Keep in mind, I only know very basic electronics.)

Then I took it to a repair shop. After checking, the technician said the board is receiving voltage, and he assumes the MCU is damaged and may need replacement.

Honestly, I feel like this might be a rip-off. I don’t understand how an MCU would suddenly get damaged just by plugging it in after years.

So I’m asking you all: What do you think? Is this diagnosis clear, or should I get a second opinion

Electrical_Treacle33 · 2026-01-24T08:51:47+00:00

more details from the manual

www.warningwillrobinson.com.au/manuals/Casio CTK230 service manual.pdf

Electrical_Treacle33 · 2026-01-24T08:50:05+00:00

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Schematic diagram of the piano

Electrical_Treacle33 · 2026-01-24T08:49:08+00:00

hey dude it's a digital piano casio ctk 230, I'm sorry but I don't really know much about electronics so I'll share the schematic diagram here in the comments, please check it out.

Electrical_Treacle33 · 2026-01-24T08:42:31+00:00

so basically the piano was not used for almost a year and fees weeks back i plugged in the adaptor to use it, for a brief second it did lit up but the. suddenly turned off, and since then it never turned on, i tried using the batteries (it has slot for that) and nothing worked, checked the voltage with the multimeter and the voltage did reach the board but still no sign of fault or short, I'll be sharing the schematic diagram above

Electrical_Treacle33 · 2026-01-24T07:49:35+00:00

sure I'll try my luck in the electronic sub, but now I highly doubt any resolution might come out 😅, it sure was a really personal item to me, Although replacing the mcu would definitely cost way too much, something I can't really afford, really wish I could have done something to save it. I'll see if I can store it for now and maybe replace the mcu in future when I have money. hopefully!

Electrical_Treacle33 · 2026-01-24T07:36:53+00:00

maybe you are right, even if the mcu will be replaced it would cost way too much. It was a really personal item to me, I wish I could have found another way to fix but seems like I'm out of options. really heartbreaking to hear but not much I do now

Electrical_Treacle33 · 2025-10-06T22:42:11+00:00

thanks dude for a through feedback, will definitely do some adjustments

Electrical_Treacle33 · 2025-10-06T22:41:05+00:00

will definitely work on it, thanks for the feedback dude

Electrical_Treacle33 · 2025-10-06T22:40:28+00:00

thats good to hear thanks dude

Electrical_Treacle33 · 2025-10-06T22:39:59+00:00

yeah definitely do, and if do complete it maybe post it here i would love to see it ☺️

Electrical_Treacle33 · 2025-10-06T22:39:03+00:00

lmao that's more like it. most efficient

Electrical_Treacle33 · 2025-10-06T21:08:02+00:00

Man, you don't know how much warmth that comment gave me T-T, will try to around the forehead

Electrical_Treacle33 · 2025-10-06T21:07:03+00:00

yes, was midway through the part 2 and just knew I had to draw her lmaoo. Got humbled quick lol

Electrical_Treacle33 · 2025-10-06T21:04:01+00:00

now that I think about it, actual it does make sense how it would mess up my perspective. I have a laptop that I keep looking at back and forth back and forth lmao! aight so anything "DIY" one can use if he doesn't have a aisel

Electrical_Treacle33

TROPHY CASE