メインコンテンツにスキップ

Digital multi effects processor.

1回答 すべてを表示

Why my SPX900 won't turn on?

I just bought a multi-efect procesor Yamaha SPX900 and I don't know where to start to repair. Thank you

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 0
5 件のコメント

ray salazar, what does it, or does it not, do?

さんによる

When I push the power button all LCD and indicator are off but you can hear a little click inside the unit 3 second later. When I turn the unit off I can see a couple of lights flashing in the dB meter. Any idea

さんによる

Sounds like a bad power supply. You'll have to open it up and take a closer look at the caps of the PSU.

さんによる

Dear oldturkey03,

Thank you very much. I finally have time to check it, and you are right 4 capacitors in the DC Circuit Board have leaked in the bottom. I'm gonna try to get new ones. Do you recommend to check something else? Regards

さんによる

Thanks to oldturkey03 we have the solution.

Some capacitors in the PSU were leaking. I replaced them and voilà now is working!!!

[image|619222]

さんによる

コメントを追加

1 件の回答

ベストアンサー

Change the leaking capacitors.

Block Image

このアンサーは役に立ちましたか?

スコア 0

1件のコメント:

This unit has a "switch mode" power supply. They lack the large power transformer of earlier "linear" power supply designs. The electrolytic capacitors in switchmode supplies are often the cause of failure. However without removing them one at a time and checking them each with an ESR meter, it is hard to tell which ones have failed. The down and dirty way is to replace them all. I have replaced all of them, only to find that was not the only failed part. There is a semiconductor that handles most of the current that may be hard to located a substitute for.

さんによる

コメントを追加

回答を追加する

ray salazar さん、ありがとうございました!
統計データ:

過去 24時間: 1

過去 7 日: 2

過去 30 日: 11

今までの合計 896