メインコンテンツにスキップ

修理を始めるには

修理する権利

ストア

Repair and disassembly guides for electronic keyboards.

146回答 すべてを表示

keyboard won't power with adaptor - yamaha ac power adaptor class 2 12

my yamaha keyboard has worked fine until now. when i went to turn it on, there was a brief light & then dark again. sometimes i don't even get a blip. does the same thing on other outlets. how can i tell if it's the adaptor or keyboard & how can i fix it? thanks

回答がありました! 回答を表示 同じ問題があります

この質問は役に立ちましたか?

スコア 10

コメント:

I had the same problem. I tried to switch it on and then a brief light and noise from the speaker, then it went dead. I found another 12v adaptor plugged it in and the Keyboard sprung into life! Brilliant!

さんによる

my keyboard psr E433 TURN ON AND OFF ,WHATS THE PROBLEM

さんによる

My cord is fine. I tried more than one. It is the connection inside the keyboard that is loose. When I wiggle the cord, the power will come on. The little connector box inside is not study. Oh my god, my husband is going to sauder the thing to stable it. I hope he don't ruin it. This is my problem. I wanted to take it to be fixed.

さんによる

Hi @stubb,

What is the make and model number of your keyboard? It may be that there is a replacement part available which will make it easier to replace the power socket in the keyboard than to attempt a repair on one that may be broken.

さんによる

my keyboard psr e433 is not turning on,adapter is ok whats theb problem?

さんによる

10件以上のコメントを表示

コメントを追加

6件の回答

選択されたソリューション

arch, I would do this be exclusion. Use a multimeter and measure the voltage on your adapter. The inside of the barrel is positive and the outside negative. Set your voltmeter to DC voltage and see what you get. A lot of times the wire around the barrel breaks and you may have to wiggle the wire a bit. Should your voltage be as required, it is safe to say your adapter is working as designed. Then you have a keyboard issue.

このアンサーは役に立ちましたか?

スコア 5

コメント:

Thank you old turkey, I don't have a multimeter. Is there some other way to test the adaptor? when you say "wiggle the wire", do you mean the cord or do I need to strip something away? If a wire is actually broken, how do I access it to reconnect or is there something else I can do to fix the adaptor or is my only option to replace it? Thanks, again

さんによる

コメントを追加
最も参考になった回答

Hi @margarete ,

You will need to find an AC / DC adapter with the following specifications. Try local electronic spare parts stores or search online

INPUT - 100-240V AC 60Hz (Depending on where you are in Brazil you could also get a 127V AC 60Hz or a 220V AC 60 Hz Input Type

OUTPUT - 12V DC/ 2A (12 Volts DC 2000mA)

DC CONNECTOR SIZE - 2.1mm The DC output connector plug should be wired as a Positive Centre Tip type connection. An adapter power supply with a positive tip indicates that the centre (tip) of the output plug is positive (+) and the barrel of the output plug is negative (-). Here is an image which shows what to look for to ensure that the adapter's DC Output plug is a Centre positive tip. This picture is usually stamped on to the body of the unit or within the owners manual.

Block Image

(click on image to enlarge for better viewing).

Hopefully this is of some help.

このアンサーは役に立ちましたか?

スコア 6

コメント:

I have one Yamaha model PA-3B external AC power . I need to replace this model due to not find it a new one.

I am from Brazil, I need to know what is the replacement model that I can use it.

さんによる

Just did as you said Ellin and i resolved my problem, thumbs up for you and the staff of this website.

さんによる

My yamaha psr i455 keyboard, when connect adopter its on directly and no sound

feel like some loose contact.All things are working but no sound.Can help me to solve the problem.

さんによる

Hi @babuforjesus,

Try plugging in a set of headphones and check if there is sound there when you play on the keyboard.

If you do then it could be a dirty headphone socket contact. Try inserting / removing the headphone plug a few times and check if this resolves the problem

さんによる

When I press power button on my I455, the LCD comes ON and goes OFF when I release my finger from power button..I checked my charger with multimeter.. it seems ok.. Could anyone please help?

さんによる

3件以上のコメントを表示

コメントを追加

Hi @lctsr ,

According to the service manual the part number for part JK151- DC-In 12V socket (p.10 in the Parts list) is LB302260

Here’s a link to just one supplier. It is shown only to give an idea of the cost of the part. There are other suppliers that may suit you better.

Just search online by typing LB302260 only in the search box of your browser to get suppliers of the part.

このアンサーは役に立ちましたか?

スコア 2

コメント:

I just plugged my keyboard this morning and it makes one sound I'm not familiar with,then the sound stop and ,and again once I plugged the adapter it turns on automatically without pressing the power button

さんによる

コメントを追加

I had the same problem but with the E353. When Yamaha sold me this keyboard it came with an unregulated power supply (not fixed at 12V) so I changed to one fixed at 12Vdc (regulated) and was the end of the problem.

Sometimes is hard to turn-on the keyboard but it's not related to the power supply, it's about humidity or the contacts to be cleaned.

このアンサーは役に立ちましたか?

スコア 1

コメント:

Hi, my keyboard won't turn on. I check the power supply. Same at other outlet. I have wriggled the cord at connector. Could my adapter be dead. It worked perfectly yesterday.

さんによる

コメントを追加

Hi Arch,

It could simply be that the wire is loose, so twist it until you feel the click and it should be fine.

There are other options like getting a new cord though.

Hope everything works out!

このアンサーは役に立ちましたか?

スコア 1
コメントを追加

I have a PSR-550 didn’t work with AC power but OK with batteries. Wiggled DC connector in rear and power would sometimes come on.

Took out 14 screws on back and undid 2 leads carefully to separate base assembly from top. On rear of power connector soldered small piece of flexible wire from J503 link wire to adjacent pin. (Connects to the centre pin). As added mechanical support glued connector to the PCB. Re-connect 2 leads making sure to support the PCB while pressing the connectors. All OK now!

このアンサーは役に立ちましたか?

スコア 1

コメント:

My Yamaha R700 keyboard won't light if the charger isn't connected and if it didn't show "Yamaha, 888".

さんによる

コメントを追加

回答を追加する

arch さん、ありがとうございました!
統計データを表示:

過去 24時間: 22

過去 7 日: 202

過去 30 日: 992

今までの合計 78,595